The goal of this document is to provide comprehensive reference documentation for programmers writing tests, extension authors, and engine authors as well as build tool and IDE vendors. This document is also available as a PDF download. 1.1. What is JUnit 5?Unlike previous versions of JUnit, JUnit 5 is composed of several different modules from three different sub-projects. JUnit 5 = JUnit Platform + JUnit Jupiter + JUnit Vintage The JUnit Platform serves as a foundation for on the JVM. It also defines the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
83 API for developing a testing framework that runs on the platform. Furthermore, the platform provides a to launch the platform from the command line and the for running a custom test suite using one or more test engines on the platform. First-class support for the JUnit Platform also exists in popular IDEs (see , , , and ) and build tools (see , , and ). JUnit Jupiter is the combination of the and for writing tests and extensions in JUnit 5. The Jupiter sub-project provides a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 for running Jupiter based tests on the platform. JUnit Vintage provides a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 for running JUnit 3 and JUnit 4 based tests on the platform. It requires JUnit 4.12 or later to be present on the class path or module path. 1.2. Supported Java VersionsJUnit 5 requires Java 8 (or higher) at runtime. However, you can still test code that has been compiled with previous versions of the JDK. 1.3. Getting HelpAsk JUnit 5 related questions on Stack Overflow or chat with the community on Gitter. 1.4. Getting Started
1.4.1. Downloading JUnit ArtifactsTo find out what artifacts are available for download and inclusion in your project, refer to . To set up dependency management for your build, refer to and the . 1.4.3. Example ProjectsTo see complete, working examples of projects that you can copy and experiment with, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
86 repository is a good place to start. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
86 repository hosts a collection of sample projects based on JUnit Jupiter, JUnit Vintage, and other testing frameworks. You’ll find appropriate build scripts (e.g.,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
88,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
89, etc.) in the example projects. The links below highlight some of the combinations you can choose from. - For Gradle and Java, check out the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - For Gradle and Kotlin, check out the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - For Gradle and Groovy, check out the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - For Maven, check out the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - For Ant, check out the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
2. Writing TestsThe following example provides a glimpse at the minimum requirements for writing a test in JUnit Jupiter. Subsequent sections of this chapter will provide further details on all available features. A first test case
import static org.junit.jupiter.api.Assertions.assertEquals;
import example.util.Calculator;
import org.junit.jupiter.api.Test;
class MyFirstJUnitJupiterTests {
private final Calculator calculator = new Calculator();
@Test
void addition() {
assertEquals(2, calculator.add(1, 1));
}
}
2.1. AnnotationsJUnit Jupiter supports the following annotations for configuring tests and extending the framework. Unless otherwise stated, all core annotations are located in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
95 package in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
96 module. Annotation Description
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 Denotes that a method is a test method. Unlike JUnit 4’s
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 annotation, this annotation does not declare any attributes, since test extensions in JUnit Jupiter operate based on their own dedicated annotations. Such methods are inherited unless they are overridden.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 Denotes that a method is a . Such methods are inherited unless they are overridden.
@Fast
@Test
void myFastTest() {
// ...
}
00 Denotes that a method is a test template for a . Such methods are inherited unless they are overridden.
@Fast
@Test
void myFastTest() {
// ...
}
01 Denotes that a method is a test factory for . Such methods are inherited unless they are overridden.
@Fast
@Test
void myFastTest() {
// ...
}
02 Denotes that a method is a designed to be invoked multiple times depending on the number of invocation contexts returned by the registered . Such methods are inherited unless they are overridden.
@Fast
@Test
void myFastTest() {
// ...
}
03 Used to configure the for
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes in the annotated test class. Such annotations are inherited.
@Fast
@Test
void myFastTest() {
// ...
}
05 Used to configure the for the annotated test class; similar to JUnit 4’s
@Fast
@Test
void myFastTest() {
// ...
}
06. Such annotations are inherited.
@Fast
@Test
void myFastTest() {
// ...
}
07 Used to configure the for the annotated test class. Such annotations are inherited.
@Fast
@Test
void myFastTest() {
// ...
}
08 Declares a custom for the test class or test method. Such annotations are not inherited.
@Fast
@Test
void myFastTest() {
// ...
}
09 Declares a custom for the test class. Such annotations are inherited.
@Fast
@Test
void myFastTest() {
// ...
}
10 Denotes that the annotated method should be executed before each
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97,
@Fast
@Test
void myFastTest() {
// ...
}
00,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99, or
@Fast
@Test
void myFastTest() {
// ...
}
01 method in the current class; analogous to JUnit 4’s
@Fast
@Test
void myFastTest() {
// ...
}
15. Such methods are inherited – unless they are overridden or superseded (i.e., replaced based on signature only, irrespective of Java’s visibility rules).
@Fast
@Test
void myFastTest() {
// ...
}
16 Denotes that the annotated method should be executed after each
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97,
@Fast
@Test
void myFastTest() {
// ...
}
00,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99, or
@Fast
@Test
void myFastTest() {
// ...
}
01 method in the current class; analogous to JUnit 4’s
@Fast
@Test
void myFastTest() {
// ...
}
21. Such methods are inherited – unless they are overridden or superseded (i.e., replaced based on signature only, irrespective of Java’s visibility rules).
@Fast
@Test
void myFastTest() {
// ...
}
22 Denotes that the annotated method should be executed before all
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97,
@Fast
@Test
void myFastTest() {
// ...
}
00,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99, and
@Fast
@Test
void myFastTest() {
// ...
}
01 methods in the current class; analogous to JUnit 4’s
@Fast
@Test
void myFastTest() {
// ...
}
27. Such methods are inherited – unless they are hidden, overridden, or superseded, (i.e., replaced based on signature only, irrespective of Java’s visibility rules) – and must be
@Fast
@Test
void myFastTest() {
// ...
}
28 unless the "per-class" is used.
@Fast
@Test
void myFastTest() {
// ...
}
29 Denotes that the annotated method should be executed after all
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97,
@Fast
@Test
void myFastTest() {
// ...
}
00,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99, and
@Fast
@Test
void myFastTest() {
// ...
}
01 methods in the current class; analogous to JUnit 4’s
@Fast
@Test
void myFastTest() {
// ...
}
34. Such methods are inherited – unless they are hidden, overridden, or superseded, (i.e., replaced based on signature only, irrespective of Java’s visibility rules) – and must be
@Fast
@Test
void myFastTest() {
// ...
}
28 unless the "per-class" is used.
@Fast
@Test
void myFastTest() {
// ...
}
04 Denotes that the annotated class is a non-static . On Java 8 through Java 15,
@Fast
@Test
void myFastTest() {
// ...
}
22 and
@Fast
@Test
void myFastTest() {
// ...
}
29 methods cannot be used directly in a
@Fast
@Test
void myFastTest() {
// ...
}
04 test class unless the "per-class" is used. Beginning with Java 16,
@Fast
@Test
void myFastTest() {
// ...
}
22 and
@Fast
@Test
void myFastTest() {
// ...
}
29 methods can be declared as
@Fast
@Test
void myFastTest() {
// ...
}
28 in a
@Fast
@Test
void myFastTest() {
// ...
}
04 test class with either test instance lifecycle mode. Such annotations are not inherited.
@Fast
@Test
void myFastTest() {
// ...
}
44 Used to declare , either at the class or method level; analogous to test groups in TestNG or Categories in JUnit 4. Such annotations are inherited at the class level but not at the method level.
@Fast
@Test
void myFastTest() {
// ...
}
45 Used to a test class or test method; analogous to JUnit 4’s
@Fast
@Test
void myFastTest() {
// ...
}
46. Such annotations are not inherited.
@Fast
@Test
void myFastTest() {
// ...
}
47 Used to fail a test, test factory, test template, or lifecycle method if its execution exceeds a given duration. Such annotations are inherited.
@Fast
@Test
void myFastTest() {
// ...
}
48 Used to . Such annotations are inherited.
@Fast
@Test
void myFastTest() {
// ...
}
49 Used to via fields. Such fields are inherited unless they are shadowed.
@Fast
@Test
void myFastTest() {
// ...
}
50 Used to supply a via field injection or parameter injection in a lifecycle method or test method; located in the
@Fast
@Test
void myFastTest() {
// ...
}
51 package. Some annotations may currently be experimental. Consult the table in for details. 2.1.1. Meta-Annotations and Composed AnnotationsJUnit Jupiter annotations can be used as meta-annotations. That means that you can define your own composed annotation that will automatically inherit the semantics of its meta-annotations. For example, instead of copying and pasting
@Fast
@Test
void myFastTest() {
// ...
}
52 throughout your code base (see ), you can create a custom composed annotation named
@Fast
@Test
void myFastTest() {
// ...
}
53 as follows.
@Fast
@Test
void myFastTest() {
// ...
}
53 can then be used as a drop-in replacement for
@Fast
@Test
void myFastTest() {
// ...
}
52.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
The following
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 method demonstrates usage of the
@Fast
@Test
void myFastTest() {
// ...
}
53 annotation.
@Fast
@Test
void myFastTest() {
// ...
}
You can even take that one step further by introducing a custom
@Fast
@Test
void myFastTest() {
// ...
}
58 annotation that can be used as a drop-in replacement for
@Fast
@Test
void myFastTest() {
// ...
}
52 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
JUnit automatically recognizes the following as a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 method that is tagged with "fast".
@FastTest
void myFastTest() {
// ...
}
2.2. Definitions
2.3. Test Classes and MethodsTest methods and lifecycle methods may be declared locally within the current test class, inherited from superclasses, or inherited from interfaces (see ). In addition, test methods and lifecycle methods must not be
@Fast
@Test
void myFastTest() {
// ...
}
62 and must not return a value (except
@Fast
@Test
void myFastTest() {
// ...
}
01 methods which are required to return a value). Class and method visibility Test classes, test methods, and lifecycle methods are not required to be
@Fast
@Test
void myFastTest() {
// ...
}
64, but they must not be
@Fast
@Test
void myFastTest() {
// ...
}
65. It is generally recommended to omit the
@Fast
@Test
void myFastTest() {
// ...
}
64 modifier for test classes, test methods, and lifecycle methods unless there is a technical reason for doing so – for example, when a test class is extended by a test class in another package. Another technical reason for making classes and methods
@Fast
@Test
void myFastTest() {
// ...
}
64 is to simplify testing on the module path when using the Java Module System. The following test class demonstrates the use of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 methods and all supported lifecycle methods. For further information on runtime semantics, see and . A standard test class
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
2.4. Display NamesTest classes and test methods can declare custom display names via
@Fast
@Test
void myFastTest() {
// ...
}
08 — with spaces, special characters, and even emojis — that will be displayed in test reports and by test runners and IDEs.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
2.4.1. Display Name GeneratorsJUnit Jupiter supports custom display name generators that can be configured via the
@Fast
@Test
void myFastTest() {
// ...
}
09 annotation. Values provided via
@Fast
@Test
void myFastTest() {
// ...
}
08 annotations always take precedence over display names generated by a
@Fast
@Test
void myFastTest() {
// ...
}
72. Generators can be created by implementing
@Fast
@Test
void myFastTest() {
// ...
}
72. Here are some default ones available in Jupiter: DisplayNameGenerator Behavior
@Fast
@Test
void myFastTest() {
// ...
}
74 Matches the standard display name generation behavior in place since JUnit Jupiter 5.0 was released.
@Fast
@Test
void myFastTest() {
// ...
}
75 Removes trailing parentheses for methods with no parameters.
@Fast
@Test
void myFastTest() {
// ...
}
76 Replaces underscores with spaces.
@Fast
@Test
void myFastTest() {
// ...
}
77 Generates complete sentences by concatenating the names of the test and the enclosing classes. Note that for
@Fast
@Test
void myFastTest() {
// ...
}
77, you can customize the separator and the underlying generator by using
@Fast
@Test
void myFastTest() {
// ...
}
79 as shown in the following example.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
2.4.2. Setting the Default Display Name GeneratorYou can use the
@Fast
@Test
void myFastTest() {
// ...
}
80 to specify the fully qualified class name of the
@Fast
@Test
void myFastTest() {
// ...
}
72 you would like to use by default. Just like for display name generators configured via the
@Fast
@Test
void myFastTest() {
// ...
}
09 annotation, the supplied class has to implement the
@Fast
@Test
void myFastTest() {
// ...
}
72 interface. The default display name generator will be used for all tests unless the
@Fast
@Test
void myFastTest() {
// ...
}
09 annotation is present on an enclosing test class or test interface. Values provided via
@Fast
@Test
void myFastTest() {
// ...
}
08 annotations always take precedence over display names generated by a
@Fast
@Test
void myFastTest() {
// ...
}
72. For example, to use the
@Fast
@Test
void myFastTest() {
// ...
}
76 display name generator by default, you should set the configuration parameter to the corresponding fully qualified class name (e.g., in
@Fast
@Test
void myFastTest() {
// ...
}
88):
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
Similarly, you can specify the fully qualified name of any custom class that implements
@Fast
@Test
void myFastTest() {
// ...
}
72. In summary, the display name for a test class or method is determined according to the following precedence rules: - value of the
@Fast
@Test
void myFastTest() { // ...
} - by calling the
@Fast
@Test
void myFastTest() { // ...
} 72 specified in the @Fast
@Test
void myFastTest() { // ...
} - by calling the default
@Fast
@Test
void myFastTest() { // ...
} - by calling
@Fast
@Test
void myFastTest() { // ...
}
2.5. AssertionsJUnit Jupiter comes with many of the assertion methods that JUnit 4 has and adds a few that lend themselves well to being used with Java 8 lambdas. All JUnit Jupiter assertions are
@Fast
@Test
void myFastTest() {
// ...
}
28 methods in the
@Fast
@Test
void myFastTest() {
// ...
}
96 class.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
0 Preemptive Timeouts with
@Fast
@Test
void myFastTest() {
// ...
}
97 The various
@Fast
@Test
void myFastTest() {
// ...
}
97 methods in the
@Fast
@Test
void myFastTest() {
// ...
}
99 class execute the provided
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
00 or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
01 in a different thread than that of the calling code. This behavior can lead to undesirable side effects if the code that is executed within the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
00 or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
01 relies on
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
04 storage. One common example of this is the transactional testing support in the Spring Framework. Specifically, Spring’s testing support binds transaction state to the current thread (via a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
- before a test method is invoked. Consequently, if an
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
00 or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
01 provided to
@Fast
@Test
void myFastTest() {
// ...
}
97 invokes Spring-managed components that participate in transactions, any actions taken by those components will not be rolled back with the test-managed transaction. On the contrary, such actions will be committed to the persistent store (e.g., relational database) even though the test-managed transaction is rolled back. Similar side effects may be encountered with other frameworks that rely on
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
05 storage. 2.5.1. Kotlin Assertion SupportJUnit Jupiter also comes with a few assertion methods that lend themselves well to being used in Kotlin. All JUnit Jupiter Kotlin assertions are top-level functions in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
10 package.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
1 2.5.2. Third-party Assertion LibrariesEven though the assertion facilities provided by JUnit Jupiter are sufficient for many testing scenarios, there are times when more power and additional functionality such as matchers are desired or required. In such cases, the JUnit team recommends the use of third-party assertion libraries such as AssertJ, Hamcrest, Truth, etc. Developers are therefore free to use the assertion library of their choice. For example, the combination of matchers and a fluent API can be used to make assertions more descriptive and readable. However, JUnit Jupiter’s
@Fast
@Test
void myFastTest() {
// ...
}
96 class does not provide an method like the one found in JUnit 4’s
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
13 class which accepts a Hamcrest
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
14. Instead, developers are encouraged to use the built-in support for matchers provided by third-party assertion libraries. The following example demonstrates how to use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
12 support from Hamcrest in a JUnit Jupiter test. As long as the Hamcrest library has been added to the classpath, you can statically import methods such as
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
12,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
17, and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
18 and then use them in tests like in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
19 method below.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
2 Naturally, legacy tests based on the JUnit 4 programming model can continue using
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
20. 2.6. AssumptionsJUnit Jupiter comes with a subset of the assumption methods that JUnit 4 provides and adds a few that lend themselves well to being used with Java 8 lambda expressions and method references. All JUnit Jupiter assumptions are static methods in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
21 class.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
3 As of JUnit Jupiter 5.4, it is also possible to use methods from JUnit 4’s
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
22 class for assumptions. Specifically, JUnit Jupiter supports JUnit 4’s
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
23 to signal that a test should be aborted instead of marked as a failure. 2.7. Disabling TestsHere’s a
@Fast
@Test
void myFastTest() {
// ...
}
45 test class.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
4 And here’s a test class that contains a
@Fast
@Test
void myFastTest() {
// ...
}
45 test method.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
5
@Fast
@Test
void myFastTest() {
// ...
}
45 may be declared without providing a reason; however, the JUnit team recommends that developers provide a short explanation for why a test class or test method has been disabled. Consequently, the above examples both show the use of a reason — for example,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
27. Some development teams even require the presence of issue tracking numbers in the reason for automated traceability, etc.
@Fast
@Test
void myFastTest() {
// ...
}
45 is not
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
29. Consequently, if you wish to disable a class whose superclass is
@Fast
@Test
void myFastTest() {
// ...
}
45, you must redeclare
@Fast
@Test
void myFastTest() {
// ...
}
45 on the subclass. 2.8. Conditional Test ExecutionThe extension API in JUnit Jupiter allows developers to either enable or disable a container or test based on certain conditions programmatically. The simplest example of such a condition is the built-in
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
33 which supports the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
34 annotation (see ). In addition to
@Fast
@Test
void myFastTest() {
// ...
}
45, JUnit Jupiter also supports several other annotation-based conditions in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
36 package that allow developers to enable or disable containers and tests declaratively. When multiple
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
32 extensions are registered, a container or test is disabled as soon as one of the conditions returns disabled. If you wish to provide details about why they might be disabled, every annotation associated with these built-in conditions has a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
38 attribute available for that purpose. Composed Annotations Note that any of the conditional annotations listed in the following sections may also be used as a meta-annotation in order to create a custom composed annotation. For example, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
39 annotation in the shows how you can combine
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
41 in a single, reusable annotation. Conditional annotations in JUnit Jupiter are not
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
29. Consequently, if you wish to apply the same semantics to subclasses, each conditional annotation must be redeclared on each subclass. Unless otherwise stated, each of the conditional annotations listed in the following sections can only be declared once on a given test interface, test class, or test method. If a conditional annotation is directly present, indirectly present, or meta-present multiple times on a given element, only the first such annotation discovered by JUnit will be used; any additional declarations will be silently ignored. Note, however, that each conditional annotation may be used in conjunction with other conditional annotations in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
36 package. 2.8.1. Operating System and Architecture ConditionsA container or test may be enabled or disabled on a particular operating system, architecture, or combination of both via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
44 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
45 annotations. Conditional execution based on operating system
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
6 Conditional execution based on architecture
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
7 2.8.2. Java Runtime Environment ConditionsA container or test may be enabled or disabled on particular versions of the Java Runtime Environment (JRE) via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
46 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
47 annotations or on a particular range of versions of the JRE via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
48 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
49 annotations. The range defaults to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
50 as the lower border (
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
- and
import java.lang.annotation.ElementType;
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@Target(ElementType.METHOD)
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public @interface FastTest {
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52 as the higher border (
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
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53), which allows usage of half open ranges.
import java.lang.annotation.ElementType;
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import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
8 2.8.3. Native Image Conditionsimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
9 2.8.4. System Property ConditionsA container or test may be enabled or disabled based on the value of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
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import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
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public @interface FastTest {
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54 JVM system property via the
import java.lang.annotation.ElementType;
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import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
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55 and
import java.lang.annotation.ElementType;
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@Target(ElementType.METHOD)
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56 annotations. The value supplied via the
import java.lang.annotation.ElementType;
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57 attribute will be interpreted as a regular expression.
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0 As of JUnit Jupiter 5.6,
import java.lang.annotation.ElementType;
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55 and
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@Target(ElementType.METHOD)
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56 are repeatable annotations. Consequently, these annotations may be declared multiple times on a test interface, test class, or test method. Specifically, these annotations will be found if they are directly present, indirectly present, or meta-present on a given element. 2.8.5. Environment Variable ConditionsA container or test may be enabled or disabled based on the value of the
import java.lang.annotation.ElementType;
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54 environment variable from the underlying operating system via the
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61 and
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62 annotations. The value supplied via the
import java.lang.annotation.ElementType;
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57 attribute will be interpreted as a regular expression.
@Fast
@Test
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// ...
}
1 As of JUnit Jupiter 5.6,
import java.lang.annotation.ElementType;
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61 and
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62 are repeatable annotations. Consequently, these annotations may be declared multiple times on a test interface, test class, or test method. Specifically, these annotations will be found if they are directly present, indirectly present, or meta-present on a given element. 2.8.6. Custom ConditionsAs an alternative to implementing an , a container or test may be enabled or disabled based on a condition method configured via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
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67 and
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68 annotations. A condition method must have a
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69 return type and may accept either no arguments or a single
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70 argument. The following test class demonstrates how to configure a local method named
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public @interface FastTest {
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71 via
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@Target(ElementType.METHOD)
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public @interface FastTest {
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72 and
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@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
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public @interface FastTest {
}
73.
@Fast
@Test
void myFastTest() {
// ...
}
2 Alternatively, the condition method can be located outside the test class. In this case, it must be referenced by its fully qualified name as demonstrated in the following example.
@Fast
@Test
void myFastTest() {
// ...
}
3 There are several cases where a condition method would need to be
@Fast
@Test
void myFastTest() {
// ...
}
28: - when
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@Target(ElementType.METHOD)
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} - when
import java.lang.annotation.ElementType;
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@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
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} 73 is used on a import java.lang.annotation.ElementType;
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import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 99 or a @Fast
@Test
void myFastTest() { // ...
} - when the condition method is located in an external class
In any other case, you can use either static methods or instance methods as condition methods. It is often the case that you can use an existing static method in a utility class as a custom condition. For example,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
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import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
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81 provides a
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@Target(ElementType.METHOD)
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public @interface FastTest {
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82 method that can be used to determine if the current environment does not support a graphical display. Thus, if you have a test that depends on graphical support you can disable it when such support is unavailable as follows.
@Fast
@Test
void myFastTest() {
// ...
}
4 2.9. Tagging and FilteringTest classes and methods can be tagged via the
@Fast
@Test
void myFastTest() {
// ...
}
44 annotation. Those tags can later be used to filter . Please refer to the section for more information about tag support in the JUnit Platform.
@Fast
@Test
void myFastTest() {
// ...
}
5 2.10. Test Execution OrderBy default, test classes and methods will be ordered using an algorithm that is deterministic but intentionally nonobvious. This ensures that subsequent runs of a test suite execute test classes and test methods in the same order, thereby allowing for repeatable builds. See for a definition of test method and test class. 2.10.1. Method OrderAlthough true unit tests typically should not rely on the order in which they are executed, there are times when it is necessary to enforce a specific test method execution order — for example, when writing integration tests or functional tests where the sequence of the tests is important, especially in conjunction with
import java.lang.annotation.ElementType;
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import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
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public @interface FastTest {
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84. To control the order in which test methods are executed, annotate your test class or test interface with
import java.lang.annotation.ElementType;
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@Target(ElementType.METHOD)
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public @interface FastTest {
}
85 and specify the desired
import java.lang.annotation.ElementType;
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import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
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public @interface FastTest {
}
86 implementation. You can implement your own custom
import java.lang.annotation.ElementType;
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import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
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public @interface FastTest {
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87 or use one of the following built-in
import java.lang.annotation.ElementType;
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import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
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public @interface FastTest {
}
87 implementations. The following example demonstrates how to guarantee that test methods are executed in the order specified via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
96 annotation.
@Fast
@Test
void myFastTest() {
// ...
}
6 Setting the Default Method OrdererYou can use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
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public @interface FastTest {
}
97 to specify the fully qualified class name of the
import java.lang.annotation.ElementType;
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import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
86 you would like to use by default. Just like for the orderer configured via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
85 annotation, the supplied class has to implement the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
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public @interface FastTest {
}
87 interface. The default orderer will be used for all tests unless the
@Fast
@Test
void myFastTest() {
// ...
}
05 annotation is present on an enclosing test class or test interface. For example, to use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
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public @interface FastTest {
}
91 method orderer by default, you should set the configuration parameter to the corresponding fully qualified class name (e.g., in
@Fast
@Test
void myFastTest() {
// ...
}
88):
@Fast
@Test
void myFastTest() {
// ...
}
7 Similarly, you can specify the fully qualified name of any custom class that implements
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
87. 2.10.2. Class OrderAlthough test classes typically should not rely on the order in which they are executed, there are times when it is desirable to enforce a specific test class execution order. You may wish to execute test classes in a random order to ensure there are no accidental dependencies between test classes, or you may wish to order test classes to optimize build time as outlined in the following scenarios. - Run previously failing tests and faster tests first: "fail fast" mode
- With parallel execution enabled, schedule longer tests first: "shortest test plan execution duration" mode
- Various other use cases
To configure test class execution order globally for the entire test suite, use the
@FastTest
void myFastTest() {
// ...
}
05 to specify the fully qualified class name of the
@FastTest
void myFastTest() {
// ...
}
06 you would like to use. The supplied class must implement the
@FastTest
void myFastTest() {
// ...
}
07 interface. You can implement your own custom
@FastTest
void myFastTest() {
// ...
}
07 or use one of the following built-in
@FastTest
void myFastTest() {
// ...
}
07 implementations. For example, for the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
96 annotation to be honored on test classes, you should configure the
@FastTest
void myFastTest() {
// ...
}
12 class orderer using the configuration parameter with the corresponding fully qualified class name (e.g., in
@Fast
@Test
void myFastTest() {
// ...
}
88):
@Fast
@Test
void myFastTest() {
// ...
}
8 The configured
@FastTest
void myFastTest() {
// ...
}
07 will be applied to all top-level test classes (including
@Fast
@Test
void myFastTest() {
// ...
}
28 nested test classes) and
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes. Top-level test classes will be ordered relative to each other; whereas,
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes will be ordered relative to other
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes sharing the same enclosing class. To configure test class execution order locally for
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes, declare the
@FastTest
void myFastTest() {
// ...
}
24 annotation on the enclosing class for the
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes you want to order, and supply a class reference to the
@FastTest
void myFastTest() {
// ...
}
07 implementation you would like to use directly in the
@Fast
@Test
void myFastTest() {
// ...
}
03 annotation. The configured
@FastTest
void myFastTest() {
// ...
}
07 will be applied recursively to
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes and their
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes. Note that a local
@Fast
@Test
void myFastTest() {
// ...
}
03 declaration always overrides an inherited
@Fast
@Test
void myFastTest() {
// ...
}
03 declaration or a
@FastTest
void myFastTest() {
// ...
}
07 configured globally via the
@FastTest
void myFastTest() {
// ...
}
05 configuration parameter. The following example demonstrates how to guarantee that
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes are executed in the order specified via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
96 annotation.
@Fast
@Test
void myFastTest() {
// ...
}
9 2.11. Test Instance LifecycleIn order to allow individual test methods to be executed in isolation and to avoid unexpected side effects due to mutable test instance state, JUnit creates a new instance of each test class before executing each test method (see ). This "per-method" test instance lifecycle is the default behavior in JUnit Jupiter and is analogous to all previous versions of JUnit. Please note that the test class will still be instantiated if a given test method is disabled via a (e.g.,
@Fast
@Test
void myFastTest() {
// ...
}
45,
@FastTest
void myFastTest() {
// ...
}
38, etc.) even when the "per-method" test instance lifecycle mode is active. If you would prefer that JUnit Jupiter execute all test methods on the same test instance, annotate your test class with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
84. When using this mode, a new test instance will be created once per test class. Thus, if your test methods rely on state stored in instance variables, you may need to reset that state in
@Fast
@Test
void myFastTest() {
// ...
}
10 or
@Fast
@Test
void myFastTest() {
// ...
}
16 methods. The "per-class" mode has some additional benefits over the default "per-method" mode. Specifically, with the "per-class" mode it becomes possible to declare
@Fast
@Test
void myFastTest() {
// ...
}
22 and
@Fast
@Test
void myFastTest() {
// ...
}
29 on non-static methods as well as on interface
@FastTest
void myFastTest() {
// ...
}
44 methods. The "per-class" mode therefore also makes it possible to use
@Fast
@Test
void myFastTest() {
// ...
}
22 and
@Fast
@Test
void myFastTest() {
// ...
}
29 methods in
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes. Beginning with Java 16,
@Fast
@Test
void myFastTest() {
// ...
}
22 and
@Fast
@Test
void myFastTest() {
// ...
}
29 methods can be declared as
@Fast
@Test
void myFastTest() {
// ...
}
28 in
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes. If you are authoring tests using the Kotlin programming language, you may also find it easier to implement non-static
@Fast
@Test
void myFastTest() {
// ...
}
22 and
@Fast
@Test
void myFastTest() {
// ...
}
29 lifecycle methods as well as
@FastTest
void myFastTest() {
// ...
}
54 factory methods by switching to the "per-class" test instance lifecycle mode. 2.11.1. Changing the Default Test Instance LifecycleIf a test class or test interface is not annotated with
@Fast
@Test
void myFastTest() {
// ...
}
07, JUnit Jupiter will use a default lifecycle mode. The standard default mode is
@FastTest
void myFastTest() {
// ...
}
56; however, it is possible to change the default for the execution of an entire test plan. To change the default test instance lifecycle mode, set the
@FastTest
void myFastTest() {
// ...
}
57 configuration parameter to the name of an enum constant defined in
@FastTest
void myFastTest() {
// ...
}
58, ignoring case. This can be supplied as a JVM system property, as a configuration parameter in the
@FastTest
void myFastTest() {
// ...
}
59 that is passed to the
@FastTest
void myFastTest() {
// ...
}
60, or via the JUnit Platform configuration file (see for details). For example, to set the default test instance lifecycle mode to
@FastTest
void myFastTest() {
// ...
}
61, you can start your JVM with the following system property.
@FastTest
void myFastTest() {
// ...
}
62 Note, however, that setting the default test instance lifecycle mode via the JUnit Platform configuration file is a more robust solution since the configuration file can be checked into a version control system along with your project and can therefore be used within IDEs and your build software. To set the default test instance lifecycle mode to
@FastTest
void myFastTest() {
// ...
}
61 via the JUnit Platform configuration file, create a file named
@FastTest
void myFastTest() {
// ...
}
64 in the root of the class path (e.g.,
@FastTest
void myFastTest() {
// ...
}
- with the following content.
@FastTest
void myFastTest() {
// ...
}
66 Changing the default test instance lifecycle mode can lead to unpredictable results and fragile builds if not applied consistently. For example, if the build configures "per-class" semantics as the default but tests in the IDE are executed using "per-method" semantics, that can make it difficult to debug errors that occur on the build server. It is therefore recommended to change the default in the JUnit Platform configuration file instead of via a JVM system property. 2.12. Nested Tests@Fast
@Test
void myFastTest() {
// ...
}
04 tests give the test writer more capabilities to express the relationship among several groups of tests. Such nested tests make use of Java’s nested classes and facilitate hierarchical thinking about the test structure. Here’s an elaborate example, both as source code and as a screenshot of the execution within an IDE. Nested test suite for testing a stack
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
0 When executing this example in an IDE, the test execution tree in the GUI will look similar to the following image. Executing a nested test in an IDE In this example, preconditions from outer tests are used in inner tests by defining hierarchical lifecycle methods for the setup code. For example,
@FastTest
void myFastTest() {
// ...
}
68 is a
@Fast
@Test
void myFastTest() {
// ...
}
10 lifecycle method that is used in the test class in which it is defined and in all levels in the nesting tree below the class in which it is defined. The fact that setup code from outer tests is run before inner tests are executed gives you the ability to run all tests independently. You can even run inner tests alone without running the outer tests, because the setup code from the outer tests is always executed. Only non-static nested classes (i.e. inner classes) can serve as
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes. Nesting can be arbitrarily deep, and those inner classes are subject to full lifecycle support with one exception:
@Fast
@Test
void myFastTest() {
// ...
}
22 and
@Fast
@Test
void myFastTest() {
// ...
}
29 methods do not work by default. The reason is that Java does not allow
@Fast
@Test
void myFastTest() {
// ...
}
28 members in inner classes prior to Java 16. However, this restriction can be circumvented by annotating a
@Fast
@Test
void myFastTest() {
// ...
}
04 test class with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
84 (see ). If you are using Java 16 or higher,
@Fast
@Test
void myFastTest() {
// ...
}
22 and
@Fast
@Test
void myFastTest() {
// ...
}
29 methods can be declared as
@Fast
@Test
void myFastTest() {
// ...
}
28 in
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes, and this restriction no longer applies. 2.13. Dependency Injection for Constructors and MethodsIn all prior JUnit versions, test constructors or methods were not allowed to have parameters (at least not with the standard
@FastTest
void myFastTest() {
// ...
}
80 implementations). As one of the major changes in JUnit Jupiter, both test constructors and methods are now permitted to have parameters. This allows for greater flexibility and enables Dependency Injection for constructors and methods.
@FastTest
void myFastTest() {
// ...
}
81 defines the API for test extensions that wish to dynamically resolve parameters at runtime. If a test class constructor, a test method, or a lifecycle method (see ) accepts a parameter, the parameter must be resolved at runtime by a registered
@FastTest
void myFastTest() {
// ...
}
82. There are currently three built-in resolvers that are registered automatically. @FastTest
void myFastTest() { // ...
} 83: if a constructor or method parameter is of type @FastTest
void myFastTest() { // ...
} 84, the @FastTest
void myFastTest() { // ...
} 85 will supply an instance of @FastTest
void myFastTest() { // ...
} 86 corresponding to the current container or test as the value for the parameter. The @FastTest
void myFastTest() { // ...
} 86 can then be used to retrieve information about the current container or test such as the display name, the test class, the test method, and associated tags. The display name is either a technical name, such as the name of the test class or test method, or a custom name configured via @Fast
@Test
void myFastTest() { // ...
} -
@FastTest
void myFastTest() { // ...
} 84 acts as a drop-in replacement for the @FastTest
void myFastTest() { // ...
} 90 rule from JUnit 4. The following demonstrates how to have @FastTest
void myFastTest() { // ...
} 86 injected into a test constructor, @Fast
@Test
void myFastTest() { // ...
} 10 method, and import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
1 @FastTest
void myFastTest() { // ...
} 94: if a method parameter in a @Fast
@Test
void myFastTest() { // ...
} 00, @Fast
@Test
void myFastTest() { // ...
} 10, or @Fast
@Test
void myFastTest() { // ...
} 16 method is of type @FastTest
void myFastTest() { // ...
} 98, the @FastTest
void myFastTest() { // ...
} 99 will supply an instance of import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 00. import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 00 can then be used to retrieve information about the current repetition, the total number of repetitions, the number of repetitions that have failed, and the failure threshold for the corresponding @Fast
@Test
void myFastTest() { // ...
} 00. Note, however, that @FastTest
void myFastTest() { // ...
} 99 is not registered outside the context of a @Fast
@Test
void myFastTest() { // ...
} import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 05: if a constructor or method parameter is of type import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 06, the import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 07 will supply an instance of import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 08. The import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 08 can be used to publish additional data about the current test run. The data can be consumed via the import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 10 method in a import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 11, allowing it to be viewed in IDEs or included in reports.
In JUnit Jupiter you should use import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 08 where you used to print information to import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 13 or import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 14 in JUnit 4. Using import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 15 will output all reported entries to import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 13. In addition, some IDEs print report entries to import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
2 Other parameter resolvers must be explicitly enabled by registering appropriate via
@Fast
@Test
void myFastTest() {
// ...
}
48. Check out the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
19 for an example of a custom
@FastTest
void myFastTest() {
// ...
}
81. While not intended to be production-ready, it demonstrates the simplicity and expressiveness of both the extension model and the parameter resolution process.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
21 demonstrates how to inject random values into
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 methods.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
3 When the type of the parameter to inject is the only condition for your
@FastTest
void myFastTest() {
// ...
}
81, you can use the generic
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
24 base class. The
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
25 method is implemented behind the scenes and supports parameterized types. 2.14. Test Interfaces and Default MethodsJUnit Jupiter allows
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97,
@Fast
@Test
void myFastTest() {
// ...
}
00,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99,
@Fast
@Test
void myFastTest() {
// ...
}
01,
@Fast
@Test
void myFastTest() {
// ...
}
02,
@Fast
@Test
void myFastTest() {
// ...
}
10, and
@Fast
@Test
void myFastTest() {
// ...
}
16 to be declared on interface
@FastTest
void myFastTest() {
// ...
}
44 methods.
@Fast
@Test
void myFastTest() {
// ...
}
22 and
@Fast
@Test
void myFastTest() {
// ...
}
29 can either be declared on
@Fast
@Test
void myFastTest() {
// ...
}
28 methods in a test interface or on interface
@FastTest
void myFastTest() {
// ...
}
44 methods if the test interface or test class is annotated with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
84 (see ). Here are some examples.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
4
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
5
@Fast
@Test
void myFastTest() {
// ...
}
48 and
@Fast
@Test
void myFastTest() {
// ...
}
44 can be declared on a test interface so that classes that implement the interface automatically inherit its tags and extensions. See for the source code of the .
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
6 In your test class you can then implement these test interfaces to have them applied.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
7 Running the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
41 results in output similar to the following:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
8 Another possible application of this feature is to write tests for interface contracts. For example, you can write tests for how implementations of
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
42 or
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
43 should behave as follows.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
9
@FastTest
void myFastTest() {
// ...
}
0
@FastTest
void myFastTest() {
// ...
}
1 In your test class you can then implement both contract interfaces thereby inheriting the corresponding tests. Of course you’ll have to implement the abstract methods.
@FastTest
void myFastTest() {
// ...
}
2 The above tests are merely meant as examples and therefore not complete. 2.15. Repeated TestsJUnit Jupiter provides the ability to repeat a test a specified number of times by annotating a method with
@Fast
@Test
void myFastTest() {
// ...
}
00 and specifying the total number of repetitions desired. Each invocation of a repeated test behaves like the execution of a regular
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 method with full support for the same lifecycle callbacks and extensions. The following example demonstrates how to declare a test named
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
46 that will be automatically repeated 10 times.
@FastTest
void myFastTest() {
// ...
}
3 Since JUnit Jupiter 5.10,
@Fast
@Test
void myFastTest() {
// ...
}
00 can be configured with a failure threshold which signifies the number of failures after which remaining repetitions will be automatically skipped. Set the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
48 attribute to a positive number less than the total number of repetitions in order to skip the invocations of remaining repetitions after the specified number of failures has been encountered. For example, if you are using
@Fast
@Test
void myFastTest() {
// ...
}
00 to repeatedly invoke a test that you suspect to be flaky, a single failure is sufficient to demonstrate that the test is flaky, and there is no need to invoke the remaining repetitions. To support that specific use case, set
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
50. You can alternatively set the threshold to a number greater than 1 depending on your use case. By default, the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
48 attribute is set to
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
52, signaling that no failure threshold will be applied, which effectively means that the specified number of repetitions will be invoked regardless of whether any repetitions fail. If the repetitions of a
@Fast
@Test
void myFastTest() {
// ...
}
00 method are executed in parallel, no guarantees can be made regarding the failure threshold. It is therefore recommended that a
@Fast
@Test
void myFastTest() {
// ...
}
00 method be annotated with
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
55 when parallel execution is configured. See for further details. In addition to specifying the number of repetitions and failure threshold, a custom display name can be configured for each repetition via the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
56 attribute of the
@Fast
@Test
void myFastTest() {
// ...
}
00 annotation. Furthermore, the display name can be a pattern composed of a combination of static text and dynamic placeholders. The following placeholders are currently supported. import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 58: display name of the @Fast
@Test
void myFastTest() { // ...
} import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
The default display name for a given repetition is generated based on the following pattern:
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
62. Thus, the display names for individual repetitions of the previous
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
46 example would be:
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
64,
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
65, etc. If you would like the display name of the
@Fast
@Test
void myFastTest() {
// ...
}
00 method included in the name of each repetition, you can define your own custom pattern or use the predefined
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
67 pattern. The latter is equal to
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
68 which results in display names for individual repetitions like
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
69,
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
70, etc. In order to retrieve information about the current repetition, the total number of repetitions, the number of repetitions that have failed, and the failure threshold, a developer can choose to have an instance of
@FastTest
void myFastTest() {
// ...
}
98 injected into a
@Fast
@Test
void myFastTest() {
// ...
}
00,
@Fast
@Test
void myFastTest() {
// ...
}
10, or
@Fast
@Test
void myFastTest() {
// ...
}
16 method. 2.15.1. Repeated Test ExamplesThe
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
75 class at the end of this section demonstrates several examples of repeated tests. The
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
46 method is identical to the example from the previous section; whereas,
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
77 demonstrates how to have an instance of
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
00 injected into a test to access the total number of repetitions for the current repeated test.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
79 demonstrates how to set a failure threshold and simulates an unexpected failure for every second repetition. The resulting behavior can be viewed in the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
80 output at the end of this section. The next two methods demonstrate how to include a custom
@Fast
@Test
void myFastTest() {
// ...
}
08 for the
@Fast
@Test
void myFastTest() {
// ...
}
00 method in the display name of each repetition.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
83 combines a custom display name with a custom pattern and then uses
@FastTest
void myFastTest() {
// ...
}
86 to verify the format of the generated display name.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
85 is the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
58 which comes from the
@Fast
@Test
void myFastTest() {
// ...
}
08 declaration, and
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
88 comes from
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
89. In contrast,
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
90 uses the aforementioned predefined
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
67 pattern.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
92 demonstrates the ability to translate display names of repeated tests into foreign languages — in this case German, resulting in names for individual repetitions such as:
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
93,
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
94, etc. Since the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
95 method is annotated with
@Fast
@Test
void myFastTest() {
// ...
}
10 it will get executed before each repetition of each repeated test. By having the
@FastTest
void myFastTest() {
// ...
}
86 and
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
00 injected into the method, we see that it’s possible to obtain information about the currently executing repeated test. Executing
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
75 with the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
00 log level enabled results in the following output.
@FastTest
void myFastTest() {
// ...
}
4
@FastTest
void myFastTest() {
// ...
}
5 When using the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
80 with the unicode theme enabled, execution of
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
75 results in the following output to the console.
@FastTest
void myFastTest() {
// ...
}
6 2.16. Parameterized TestsParameterized tests make it possible to run a test multiple times with different arguments. They are declared just like regular
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 methods but use the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
04 annotation instead. In addition, you must declare at least one source that will provide the arguments for each invocation and then consume the arguments in the test method. The following example demonstrates a parameterized test that uses the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
05 annotation to specify a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06 array as the source of arguments.
@FastTest
void myFastTest() {
// ...
}
7 When executing the above parameterized test method, each invocation will be reported separately. For instance, the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
80 will print output similar to the following.
@FastTest
void myFastTest() {
// ...
}
8 2.16.1. Required SetupIn order to use parameterized tests you need to add a dependency on the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
08 artifact. Please refer to for details. 2.16.2. Consuming ArgumentsParameterized test methods typically consume arguments directly from the configured source (see ) following a one-to-one correlation between argument source index and method parameter index (see examples in ). However, a parameterized test method may also choose to aggregate arguments from the source into a single object passed to the method (see ). Additional arguments may also be provided by a
@FastTest
void myFastTest() {
// ...
}
82 (e.g., to obtain an instance of
@FastTest
void myFastTest() {
// ...
}
86,
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
08, etc.). Specifically, a parameterized test method must declare formal parameters according to the following rules. - Zero or more indexed arguments must be declared first.
- Zero or more aggregators must be declared next.
- Zero or more arguments supplied by a
@FastTest
void myFastTest() { // ...
}
In this context, an indexed argument is an argument for a given index in the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
13 provided by an
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
14 that is passed as an argument to the parameterized method at the same index in the method’s formal parameter list. An aggregator is any parameter of type
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
15 or any parameter annotated with
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
16. AutoCloseable arguments Arguments that implement
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
17 (or
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
18 which extends
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
- will be automatically closed after
@Fast
@Test
void myFastTest() {
// ...
}
16 methods and
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
21 extensions have been called for the current parameterized test invocation. To prevent this from happening, set the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
22 attribute in
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
24. Specifically, if an argument that implements
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
25 is reused for multiple invocations of the same parameterized test method, you must annotate the method with
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
26 to ensure that the argument is not closed between invocations. 2.16.3. Sources of ArgumentsOut of the box, JUnit Jupiter provides quite a few source annotations. Each of the following subsections provides a brief overview and an example for each of them. Please refer to the Javadoc in the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
27 package for additional information. @ValueSourceimport org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
05 is one of the simplest possible sources. It lets you specify a single array of literal values and can only be used for providing a single argument per parameterized test invocation. The following types of literal values are supported by
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
05. import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
For example, the following
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 method will be invoked three times, with the values
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
41,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
42, and
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
43 respectively.
@FastTest
void myFastTest() {
// ...
}
9 Null and Empty SourcesIn order to check corner cases and verify proper behavior of our software when it is supplied bad input, it can be useful to have
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44 and empty values supplied to our parameterized tests. The following annotations serve as sources of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44 and empty values for parameterized tests that accept a single argument. import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 46: provides a single import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 44 argument to the annotated import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 99 method. import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 50: provides a single empty argument to the annotated import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 99 method for parameters of the following types: import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 38, import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 53 (and concrete subtypes with a @Fast
@Test
void myFastTest() { // ...
} 64 no-arg constructor), import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 55, import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 56, import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 57, import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 58, import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 59 (and concrete subtypes with a @Fast
@Test
void myFastTest() { // ...
} 64 no-arg constructor), import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 61, import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 62, primitive arrays (e.g., import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 63, import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 64, etc.), object arrays (e.g., import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 65, import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 67: a composed annotation that combines the functionality of import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 49 and import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
If you need to supply multiple varying types of blank strings to a parameterized test, you can achieve that using — for example,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
70. You can also combine
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
49,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
69, and
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
05 to test a wider range of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44, empty, and blank input. The following example demonstrates how to achieve this for strings.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
0 Making use of the composed
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
75 annotation simplifies the above as follows.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
1 Both variants of the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
76 parameterized test method result in six invocations: 1 for
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44, 1 for the empty string, and 4 for the explicit blank strings supplied via
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
05. @EnumSourceimport org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
79 provides a convenient way to use
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
80 constants.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
2 The annotation’s
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
81 attribute is optional. When omitted, the declared type of the first method parameter is used. The test will fail if it does not reference an enum type. Thus, the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
81 attribute is required in the above example because the method parameter is declared as
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
83, i.e. the interface implemented by
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
84, which isn’t an enum type. Changing the method parameter type to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
84 allows you to omit the explicit enum type from the annotation as follows.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
3 The annotation provides an optional
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
86 attribute that lets you specify which constants shall be used, like in the following example. If omitted, all constants will be used.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
4 The
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
79 annotation also provides an optional
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
88 attribute that enables fine-grained control over which constants are passed to the test method. For example, you can exclude names from the enum constant pool or specify regular expressions as in the following examples.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
5
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
6 @MethodSourceimport org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
89 allows you to refer to one or more factory methods of the test class or external classes. Factory methods within the test class must be
@Fast
@Test
void myFastTest() {
// ...
}
28 unless the test class is annotated with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
84; whereas, factory methods in external classes must always be
@Fast
@Test
void myFastTest() {
// ...
}
28. Each factory method must generate a stream of arguments, and each set of arguments within the stream will be provided as the physical arguments for individual invocations of the annotated
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 method. Generally speaking this translates to a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
94 of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
13 (i.e.,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
96); however, the actual concrete return type can take on many forms. In this context, a "stream" is anything that JUnit can reliably convert into a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
94, such as
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
94,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
99,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
00,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
01,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
02,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
03,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
04, an array of objects, or an array of primitives. The "arguments" within the stream can be supplied as an instance of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
13, an array of objects (e.g.,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
06), or a single value if the parameterized test method accepts a single argument. If you only need a single parameter, you can return a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
94 of instances of the parameter type as demonstrated in the following example.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
7 If you do not explicitly provide a factory method name via
@FastTest
void myFastTest() {
// ...
}
54, JUnit Jupiter will search for a factory method that has the same name as the current
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 method by convention. This is demonstrated in the following example.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
8 Streams for primitive types (
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
99,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
01, and
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
- are also supported as demonstrated by the following example.
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
9 If a parameterized test method declares multiple parameters, you need to return a collection, stream, or array of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
13 instances or object arrays as shown below (see the Javadoc for
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
89 for further details on supported return types). Note that
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
15 is a static factory method defined in the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
13 interface. In addition,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
17 may be used as an alternative to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
15.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
0 An external,
@Fast
@Test
void myFastTest() {
// ...
}
28 factory method can be referenced by providing its fully qualified method name as demonstrated in the following example.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
1 Factory methods can declare parameters, which will be provided by registered implementations of the
@FastTest
void myFastTest() {
// ...
}
82 extension API. In the following example, the factory method is referenced by its name since there is only one such method in the test class. If there are several local methods with the same name, parameters can also be provided to differentiate them – for example,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
21 or
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
22. Alternatively, the factory method can be referenced by its fully qualified method name, e.g.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
23.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
2 @CsvSourceimport org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
24 allows you to express argument lists as comma-separated values (i.e., CSV
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06 literals). Each string provided via the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
81 attribute in
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
24 represents a CSV record and results in one invocation of the parameterized test. The first record may optionally be used to supply CSV headers (see the Javadoc for the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
28 attribute for details and an example).
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
3 The default delimiter is a comma (
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
29), but you can use another character by setting the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
30 attribute. Alternatively, the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
31 attribute allows you to use a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06 delimiter instead of a single character. However, both delimiter attributes cannot be set simultaneously. By default,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
24 uses a single quote (
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
- as its quote character, but this can be changed via the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
35 attribute. See the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
36 value in the example above and in the table below. An empty, quoted value (
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
- results in an empty
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06 unless the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
39 attribute is set; whereas, an entirely empty value is interpreted as a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44 reference. By specifying one or more
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
41, a custom value can be interpreted as a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44 reference (see the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
43 example in the table below). An
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
44 is thrown if the target type of a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44 reference is a primitive type. An unquoted empty value will always be converted to a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44 reference regardless of any custom values configured via the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
41 attribute. Except within a quoted string, leading and trailing whitespace in a CSV column is trimmed by default. This behavior can be changed by setting the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
48 attribute to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49. Example Input Resulting Argument List
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
50
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
51,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
52
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
53
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
51,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
55
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
56
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
51,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
58
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
59
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
51,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
62
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
51,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
52,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
66
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
67,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
68 If the programming language you are using supports text blocks — for example, Java SE 15 or higher — you can alternatively use the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
69 attribute of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
24. Each record within a text block represents a CSV record and results in one invocation of the parameterized test. The first record may optionally be used to supply CSV headers by setting the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
28 attribute to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49 as in the example below. Using a text block, the previous example can be implemented as follows.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
4 The generated display names for the previous example include the CSV header names.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
5 In contrast to CSV records supplied via the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
81 attribute, a text block can contain comments. Any line beginning with a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
74 symbol will be treated as a comment and ignored. Note, however, that the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
74 symbol must be the first character on the line without any leading whitespace. It is therefore recommended that the closing text block delimiter (
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
- be placed either at the end of the last line of input or on the following line, left aligned with the rest of the input (as can be seen in the example below which demonstrates formatting similar to a table).
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
6 Java’s text block feature automatically removes incidental whitespace when the code is compiled. However other JVM languages such as Groovy and Kotlin do not. Thus, if you are using a programming language other than Java and your text block contains comments or new lines within quoted strings, you will need to ensure that there is no leading whitespace within your text block. @CsvFileSourceimport org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
77 lets you use comma-separated value (CSV) files from the classpath or the local file system. Each record from a CSV file results in one invocation of the parameterized test. The first record may optionally be used to supply CSV headers. You can instruct JUnit to ignore the headers via the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
78 attribute. If you would like for the headers to be used in the display names, you can set the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
28 attribute to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49. The examples below demonstrate the use of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
78 and
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
28. The default delimiter is a comma (
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
29), but you can use another character by setting the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
30 attribute. Alternatively, the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
31 attribute allows you to use a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06 delimiter instead of a single character. However, both delimiter attributes cannot be set simultaneously. Comments in CSV files Any line beginning with a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
74 symbol will be interpreted as a comment and will be ignored.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
7 two-column.csv
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
8 The following listing shows the generated display names for the first two parameterized test methods above.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
9 The following listing shows the generated display names for the last parameterized test method above that uses CSV header names.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
0 In contrast to the default syntax used in
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
24,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
77 uses a double quote (
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
- as the quote character by default, but this can be changed via the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
35 attribute. See the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
92 value in the example above. An empty, quoted value (
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
- results in an empty
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06 unless the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
39 attribute is set; whereas, an entirely empty value is interpreted as a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44 reference. By specifying one or more
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
41, a custom value can be interpreted as a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44 reference. An
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
44 is thrown if the target type of a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44 reference is a primitive type. An unquoted empty value will always be converted to a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44 reference regardless of any custom values configured via the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
41 attribute. Except within a quoted string, leading and trailing whitespace in a CSV column is trimmed by default. This behavior can be changed by setting the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
48 attribute to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49. @ArgumentsSource+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
05 can be used to specify a custom, reusable
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
14. Note that an implementation of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
14 must be declared as either a top-level class or as a
@Fast
@Test
void myFastTest() {
// ...
}
28 nested class.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
1
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
2 2.16.4. Argument Conversion
Widening ConversionJUnit Jupiter supports for arguments supplied to a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99. For example, a parameterized test annotated with
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
10 can be declared to accept not only an argument of type
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
32 but also an argument of type
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
33,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
34, or
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
35. Implicit ConversionTo support use cases like
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
24, JUnit Jupiter provides a number of built-in implicit type converters. The conversion process depends on the declared type of each method parameter. For example, if a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 declares a parameter of type
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
17 and the actual type supplied by the declared source is a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06, the string will be automatically converted into the corresponding
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
17 enum constant.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
3
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06 instances are implicitly converted to the following target types. Decimal, hexadecimal, and octal
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06 literals will be converted to their integral types:
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
31,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
30,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
32,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
33, and their boxed counterparts. Target Type Example
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
69/
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
27
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
28 →
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49 (only accepts values 'true' or 'false', case-insensitive)
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
31/
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
31
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
32,
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
33, or
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
34 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
35
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
36/
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
37
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
38 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
39
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
30/
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
41
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
32,
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
33, or
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
34 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
45
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
32/
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
47
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
32,
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
33, or
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
34 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
51
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
33/
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
53
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
32,
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
33, or
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
34 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
57
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
34/
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
59
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
60 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
61
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
35/
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
63
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
60 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
65
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
80 subclass
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
67 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
68
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
69
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
70 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
71
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
39
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
73 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
74 (use
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
75 for nested classes, e.g.
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
76)
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
39
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
78 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
79 (primitive types are supported)
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
39
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
81 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
82 (array types are supported)
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
83
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
84 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
85
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
86
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
87 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
88
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
89
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
90 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
91
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
92
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
90 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
94
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
95
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
96 →
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
97
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
98
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
70 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
00
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
01
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
02 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
03
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
04
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
05 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
06
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
07
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
08 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
09
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
10
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
11 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
12
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
13
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
14 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
15
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
16
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
17 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
18
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
19
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
20 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
21
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
22
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
23 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
24
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
25
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
26 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
27
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
28
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
29 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
30
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
31
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
32 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
33
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
34
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
20 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
36
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
37
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
38 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
39
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
40
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
41 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
42
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
43
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
44 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
45
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
46
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
47 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
48
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
49
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
50 →
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
51 Fallback String-to-Object Conversion In addition to implicit conversion from strings to the target types listed in the above table, JUnit Jupiter also provides a fallback mechanism for automatic conversion from a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06 to a given target type if the target type declares exactly one suitable factory method or a factory constructor as defined below. If multiple factory methods are discovered, they will be ignored. If a factory method and a factory constructor are discovered, the factory method will be used instead of the constructor. For example, in the following
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 method, the
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
58 argument will be created by invoking the
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
59 factory method and passing
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
60 as the title of the book.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
4
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
5 Explicit ConversionInstead of relying on implicit argument conversion you may explicitly specify an
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
61 to use for a certain parameter using the
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
62 annotation like in the following example. Note that an implementation of
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
61 must be declared as either a top-level class or as a
@Fast
@Test
void myFastTest() {
// ...
}
28 nested class.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
6
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
7 If the converter is only meant to convert one type to another, you can extend
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
65 to avoid boilerplate type checks.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
8 Explicit argument converters are meant to be implemented by test and extension authors. Thus,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
08 only provides a single explicit argument converter that may also serve as a reference implementation:
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
67. It is used via the composed annotation
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
68.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
9 If you wish to implement a custom
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
61 that also consumes an annotation (like
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
67), you have the possibility to extend the
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
71 class. 2.16.5. Argument AggregationBy default, each argument provided to a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 method corresponds to a single method parameter. Consequently, argument sources which are expected to supply a large number of arguments can lead to large method signatures. In such cases, an
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
73 can be used instead of multiple parameters. Using this API, you can access the provided arguments through a single argument passed to your test method. In addition, type conversion is supported as discussed in . Besides, you can retrieve the current test invocation index with
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
74.
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
0 An instance of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
15 is automatically injected into any parameter of type
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
15. Custom AggregatorsApart from direct access to a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 method’s arguments using an
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
15, JUnit Jupiter also supports the usage of custom, reusable aggregators. To use a custom aggregator, implement the
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
79 interface and register it via the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
16 annotation on a compatible parameter in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 method. The result of the aggregation will then be provided as an argument for the corresponding parameter when the parameterized test is invoked. Note that an implementation of
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
82 must be declared as either a top-level class or as a
@Fast
@Test
void myFastTest() {
// ...
}
28 nested class.
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
1
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
2 If you find yourself repeatedly declaring
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
84 for multiple parameterized test methods across your codebase, you may wish to create a custom composed annotation such as
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
85 that is meta-annotated with
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
84. The following example demonstrates this in action with a custom
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
87 annotation.
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
3
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
4 2.16.6. Customizing Display NamesBy default, the display name of a parameterized test invocation contains the invocation index and the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06 representation of all arguments for that specific invocation. Each of them is preceded by the parameter name (unless the argument is only available via an
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
15 or
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
90), if present in the bytecode (for Java, test code must be compiled with the
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
91 compiler flag). However, you can customize invocation display names via the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
56 attribute of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 annotation like in the following example.
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
5 When executing the above method using the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
80 you will see output similar to the following.
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
6 Please note that
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
56 is a
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
96 pattern. Thus, a single quote (
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
- needs to be represented as a doubled single quote (
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
- in order to be displayed.
The following placeholders are supported within custom display names. Placeholder Description
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
58 the display name of the method
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
000 the current invocation index (1-based)
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
001 the complete, comma-separated arguments list
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
002 the complete, comma-separated arguments list with parameter names
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
003,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
004, … an individual argument When including arguments in display names, their string representations are truncated if they exceed the configured maximum length. The limit is configurable via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
005 configuration parameter and defaults to 512 characters. When using
@FastTest
void myFastTest() {
// ...
}
54 or
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
05, you can provide custom names for arguments using the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
008 API. A custom name will be used if the argument is included in the invocation display name, like in the example below.
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
7
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
8 If you’d like to set a default name pattern for all parameterized tests in your project, you can declare the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
009 configuration parameter in the
@FastTest
void myFastTest() {
// ...
}
64 file as demonstrated in the following example (see for other options).
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
9 The display name for a parameterized test is determined according to the following precedence rules: import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests { @BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
} 56 attribute in import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - value of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 014 constant defined in import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
2.16.7. Lifecycle and InteroperabilityEach invocation of a parameterized test has the same lifecycle as a regular
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 method. For example,
@Fast
@Test
void myFastTest() {
// ...
}
10 methods will be executed before each invocation. Similar to , invocations will appear one by one in the test tree of an IDE. You may at will mix regular
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 methods and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 methods within the same test class. You may use
@FastTest
void myFastTest() {
// ...
}
82 extensions with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 methods. However, method parameters that are resolved by argument sources need to come first in the argument list. Since a test class may contain regular tests as well as parameterized tests with different parameter lists, values from argument sources are not resolved for lifecycle methods (e.g.
@Fast
@Test
void myFastTest() {
// ...
}
- and test class constructors.
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
0 2.17. Test TemplatesA
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
023 method is not a regular test case but rather a template for test cases. As such, it is designed to be invoked multiple times depending on the number of invocation contexts returned by the registered providers. Thus, it must be used in conjunction with a registered
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
024 extension. Each invocation of a test template method behaves like the execution of a regular
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 method with full support for the same lifecycle callbacks and extensions. Please refer to for usage examples. 2.18. Dynamic TestsThe standard
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 annotation in JUnit Jupiter described in is very similar to the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 annotation in JUnit 4. Both describe methods that implement test cases. These test cases are static in the sense that they are fully specified at compile time, and their behavior cannot be changed by anything happening at runtime. Assumptions provide a basic form of dynamic behavior but are intentionally rather limited in their expressiveness. In addition to these standard tests a completely new kind of test programming model has been introduced in JUnit Jupiter. This new kind of test is a dynamic test which is generated at runtime by a factory method that is annotated with
@Fast
@Test
void myFastTest() {
// ...
}
01. In contrast to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 methods, a
@Fast
@Test
void myFastTest() {
// ...
}
01 method is not itself a test case but rather a factory for test cases. Thus, a dynamic test is the product of a factory. Technically speaking, a
@Fast
@Test
void myFastTest() {
// ...
}
01 method must return a single
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
032 or a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
94,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
02,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
04,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
03, or array of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
032 instances. Instantiable subclasses of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
032 are
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
039 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
040.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
039 instances are composed of a display name and a list of dynamic child nodes, enabling the creation of arbitrarily nested hierarchies of dynamic nodes.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
040 instances will be executed lazily, enabling dynamic and even non-deterministic generation of test cases. Any
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
94 returned by a
@Fast
@Test
void myFastTest() {
// ...
}
01 will be properly closed by calling
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
045, making it safe to use a resource such as
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
046. As with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 methods,
@Fast
@Test
void myFastTest() {
// ...
}
01 methods must not be
@Fast
@Test
void myFastTest() {
// ...
}
65 or
@Fast
@Test
void myFastTest() {
// ...
}
28 and may optionally declare parameters to be resolved by
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
051. A
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
040 is a test case generated at runtime. It is composed of a display name and an
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
053.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
053 is a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
055 which means that the implementations of dynamic tests can be provided as lambda expressions or method references. Dynamic Test Lifecycle The execution lifecycle of a dynamic test is quite different than it is for a standard
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 case. Specifically, there are no lifecycle callbacks for individual dynamic tests. This means that
@Fast
@Test
void myFastTest() {
// ...
}
10 and
@Fast
@Test
void myFastTest() {
// ...
}
16 methods and their corresponding extension callbacks are executed for the
@Fast
@Test
void myFastTest() {
// ...
}
01 method but not for each dynamic test. In other words, if you access fields from the test instance within a lambda expression for a dynamic test, those fields will not be reset by callback methods or extensions between the execution of individual dynamic tests generated by the same
@Fast
@Test
void myFastTest() {
// ...
}
01 method. As of JUnit Jupiter 5.10.1, dynamic tests must always be created by factory methods; however, this might be complemented by a registration facility in a later release. 2.18.1. Dynamic Test ExamplesThe following
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
061 class demonstrates several examples of test factories and dynamic tests. The first method returns an invalid return type. Since an invalid return type cannot be detected at compile time, a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
062 is thrown when it is detected at runtime. The next six methods demonstrate the generation of a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
02,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
04,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
03, array, or
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
94 of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
040 instances. Most of these examples do not really exhibit dynamic behavior but merely demonstrate the supported return types in principle. However,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
068 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
069 demonstrate how to generate dynamic tests for a given set of strings or a range of input numbers. The next method is truly dynamic in nature.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
070 implements an
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
03 that generates random numbers, a display name generator, and a test executor and then provides all three to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
072. Although the non-deterministic behavior of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
070 is of course in conflict with test repeatability and should thus be used with care, it serves to demonstrate the expressiveness and power of dynamic tests. The next method is similar to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
070 in terms of flexibility; however,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
075 generates a stream of dynamic tests from an existing
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
94 via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
072 factory method. For demonstration purposes, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
078 method generates a single
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
040 instead of a stream, and the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
080 method generates a nested hierarchy of dynamic tests utilizing
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
039.
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
1 2.18.2. URI Test Sources for Dynamic TestsThe JUnit Platform provides
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
082, a representation of the source of a test or container used to navigate to its location by IDEs and build tools. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
082 for a dynamic test or dynamic container can be constructed from a
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
89 which can be supplied via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
085 or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
086 factory method, respectively. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
087 will be converted to one of the following
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
082 implementations.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
089 If the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
087 contains the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
091 scheme — for example,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
092.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
093 If the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
087 represents a directory present in the file system.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
095 If the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
087 represents a file present in the file system.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
097 If the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
087 contains the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
099 scheme and the fully qualified method name (FQMN) — for example,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
100. Please refer to the Javadoc for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
101 for the supported formats for a FQMN.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
102 If the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
087 contains the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
104 scheme and the fully qualified class name — for example,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
105.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
106 If none of the above
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
082 implementations are applicable. 2.19. TimeoutsThe
@Fast
@Test
void myFastTest() {
// ...
}
47 annotation allows one to declare that a test, test factory, test template, or lifecycle method should fail if its execution time exceeds a given duration. The time unit for the duration defaults to seconds but is configurable. The following example shows how
@Fast
@Test
void myFastTest() {
// ...
}
47 is applied to lifecycle and test methods.
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
2 To apply the same timeout to all test methods within a test class and all of its
@Fast
@Test
void myFastTest() {
// ...
}
04 classes, you can declare the
@Fast
@Test
void myFastTest() {
// ...
}
47 annotation at the class level. It will then be applied to all test, test factory, and test template methods within that class and its
@Fast
@Test
void myFastTest() {
// ...
}
04 classes unless overridden by a
@Fast
@Test
void myFastTest() {
// ...
}
47 annotation on a specific method or
@Fast
@Test
void myFastTest() {
// ...
}
04 class. Please note that
@Fast
@Test
void myFastTest() {
// ...
}
47 annotations declared at the class level are not applied to lifecycle methods. Declaring
@Fast
@Test
void myFastTest() {
// ...
}
47 on a
@Fast
@Test
void myFastTest() {
// ...
}
01 method checks that the factory method returns within the specified duration but does not verify the execution time of each individual
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
040 generated by the factory. Please use
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
119 or
@Fast
@Test
void myFastTest() {
// ...
}
97 for that purpose. If
@Fast
@Test
void myFastTest() {
// ...
}
47 is present on a
@Fast
@Test
void myFastTest() {
// ...
}
02 method — for example, a
@Fast
@Test
void myFastTest() {
// ...
}
00 or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
99 — each invocation will have the given timeout applied to it. 2.19.1. Thread modeThe timeout can be applied using one of the following three thread modes:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
125,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
126, or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
127. When
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
125 is used, the execution of the annotated method proceeds in the main thread of the test. If the timeout is exceeded, the main thread is interrupted from another thread. This is done to ensure interoperability with frameworks such as Spring that make use of mechanisms that are sensitive to the currently running thread — for example,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
05 transaction management. On the contrary when
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
126 is used, like the
@Fast
@Test
void myFastTest() {
// ...
}
97 assertion, the execution of the annotated method proceeds in a separate thread, this can lead to undesirable side effects, see . When
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
127 (default) thread mode is used, the thread mode is resolved via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
134 configuration parameter. If the provided configuration parameter is invalid or not present then
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
125 is used as fallback. 2.19.2. Default TimeoutsThe following can be used to specify default timeouts for all methods of a certain category unless they or an enclosing test class is annotated with
@Fast
@Test
void myFastTest() {
// ...
}
47:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
137 Default timeout for all testable and lifecycle methods
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
138 Default timeout for all testable methods
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
139 Default timeout for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 methods
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
141 Default timeout for
@Fast
@Test
void myFastTest() {
// ...
}
02 methods
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
143 Default timeout for
@Fast
@Test
void myFastTest() {
// ...
}
01 methods
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
145 Default timeout for all lifecycle methods
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
146 Default timeout for
@Fast
@Test
void myFastTest() {
// ...
}
22 methods
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
148 Default timeout for
@Fast
@Test
void myFastTest() {
// ...
}
10 methods
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
150 Default timeout for
@Fast
@Test
void myFastTest() {
// ...
}
16 methods
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
152 Default timeout for
@Fast
@Test
void myFastTest() {
// ...
}
29 methods More specific configuration parameters override less specific ones. For example,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
139 overrides
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
138 which overrides
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
137. The values of such configuration parameters must be in the following, case-insensitive format:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
157. The space between the number and the unit may be omitted. Specifying no unit is equivalent to using seconds. Table 1. Example timeout configuration parameter values Parameter value Equivalent annotation
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
158
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
159
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
160
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
161
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
162
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
163
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
164
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
165
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
166
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
167
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
168
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
169
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
170
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
171
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
172
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
173 2.19.3. Using @Timeout for Polling TestsWhen dealing with asynchronous code, it is common to write tests that poll while waiting for something to happen before performing any assertions. In some cases you can rewrite the logic to use a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
174 or another synchronization mechanism, but sometimes that is not possible — for example, if the subject under test sends a message to a channel in an external message broker and assertions cannot be performed until the message has been successfully sent through the channel. Asynchronous tests like these require some form of timeout to ensure they don’t hang the test suite by executing indefinitely, as would be the case if an asynchronous message never gets successfully delivered. By configuring a timeout for an asynchronous test that polls, you can ensure that the test does not execute indefinitely. The following example demonstrates how to achieve this with JUnit Jupiter’s
@Fast
@Test
void myFastTest() {
// ...
}
47 annotation. This technique can be used to implement "poll until" logic very easily.
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
3 If you need more control over polling intervals and greater flexibility with asynchronous tests, consider using a dedicated library such as Awaitility. 2.19.4. Disable @Timeout GloballyWhen stepping through your code in a debug session, a fixed timeout limit may influence the result of the test, e.g. mark the test as failed although all assertions were met. JUnit Jupiter supports the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
176 configuration parameter to configure when timeouts are applied. There are three modes:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
177,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
178, and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
179. The default mode is
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
177. A VM runtime is considered to run in debug mode when one of its input parameters starts with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
181 or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
182. This heuristic is queried by the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
179 mode. 2.20. Parallel ExecutionBy default, JUnit Jupiter tests are run sequentially in a single thread. Running tests in parallel — for example, to speed up execution — is available as an opt-in feature since version 5.3. To enable parallel execution, set the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
184 configuration parameter to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49 — for example, in
@FastTest
void myFastTest() {
// ...
}
64 (see for other options). Please note that enabling this property is only the first step required to execute tests in parallel. If enabled, test classes and methods will still be executed sequentially by default. Whether or not a node in the test tree is executed concurrently is controlled by its execution mode. The following two modes are available.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
125 Force execution in the same thread used by the parent. For example, when used on a test method, the test method will be executed in the same thread as any
@Fast
@Test
void myFastTest() {
// ...
}
22 or
@Fast
@Test
void myFastTest() {
// ...
}
29 methods of the containing test class.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
190 Execute concurrently unless a resource lock forces execution in the same thread. By default, nodes in the test tree use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
125 execution mode. You can change the default by setting the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
192 configuration parameter. Alternatively, you can use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
193 annotation to change the execution mode for the annotated element and its subelements (if any) which allows you to activate parallel execution for individual test classes, one by one. Configuration parameters to execute all tests in parallel
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
4 The default execution mode is applied to all nodes of the test tree with a few notable exceptions, namely test classes that use the
@FastTest
void myFastTest() {
// ...
}
61 mode or a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
86 (except for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
93). In the former case, test authors have to ensure that the test class is thread-safe; in the latter, concurrent execution might conflict with the configured execution order. Thus, in both cases, test methods in such test classes are only executed concurrently if the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
197 annotation is present on the test class or method. When parallel execution is enabled and a default
@FastTest
void myFastTest() {
// ...
}
06 is registered (see for details), top-level test classes will initially be sorted accordingly and scheduled in that order. However, they are not guaranteed to be started in exactly that order since the threads they are executed on are not controlled directly by JUnit. All nodes of the test tree that are configured with the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
190 execution mode will be executed fully in parallel according to the provided while observing the declarative mechanism. Please note that needs to be enabled separately. In addition, you can configure the default execution mode for top-level classes by setting the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
200 configuration parameter. By combining both configuration parameters, you can configure classes to run in parallel but their methods in the same thread: Configuration parameters to execute top-level classes in parallel but methods in same thread
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
5 The opposite combination will run all methods within one class in parallel, but top-level classes will run sequentially: Configuration parameters to execute top-level classes sequentially but their methods in parallel
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
6 The following diagram illustrates how the execution of two top-level test classes
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
201 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
202 with two test methods per class behaves for all four combinations of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
192 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
200 (see labels in first column). Default execution mode configuration combinations If the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
200 configuration parameter is not explicitly set, the value for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
192 will be used instead. 2.20.1. ConfigurationProperties such as the desired parallelism and the maximum pool size can be configured using a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
207. The JUnit Platform provides two implementations out of the box:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
208 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
209. Alternatively, you may implement a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
210 strategy. To select a strategy, set the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
211 configuration parameter to one of the following options.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
208 Computes the desired parallelism based on the number of available processors/cores multiplied by the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
213 configuration parameter (defaults to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
41). The optional
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
215 configuration parameter can be used to limit the maximum number of threads.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
209 Uses the mandatory
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
217 configuration parameter as the desired parallelism. The optional
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
218 configuration parameter can be used to limit the maximum number of threads.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
210 Allows you to specify a custom
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
207 implementation via the mandatory
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
221 configuration parameter to determine the desired configuration. If no configuration strategy is set, JUnit Jupiter uses the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
208 configuration strategy with a factor of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
41. Consequently, the desired parallelism will be equal to the number of available processors/cores. Parallelism alone does not imply maximum number of concurrent threads By default JUnit Jupiter does not guarantee that the number of concurrently executing tests will not exceed the configured parallelism. For example, when using one of the synchronization mechanisms described in the next section, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
224 that is used behind the scenes may spawn additional threads to ensure execution continues with sufficient parallelism. If you require such guarantees, with Java 9+, it is possible to limit the maximum number of concurrent threads by controlling the maximum pool size of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
208,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
209 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
210 strategies. Relevant propertiesThe following table lists relevant properties for configuring parallel execution. See for details on how to set such properties. Property Description Supported Values Default Value
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
184 Enable parallel test execution import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo { @Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
24 import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
192 Default execution mode of nodes in the test tree import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
234 import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
200 Default execution mode of top-level classes import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
234 import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
211 Execution strategy for desired parallelism and maximum pool size import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
208 import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
213 Factor to be multiplied by the number of available processors/cores to determine the desired parallelism for the import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
208 a positive decimal number
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
247
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
215 Factor to be multiplied by the number of available processors/cores and the value of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
213 to determine the desired parallelism for the import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
208 a positive decimal number, must be greater than or equal to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
251 256 + the value of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
213 multiplied by the number of available processors/cores
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
253 Disable saturation of the underlying fork-join pool for the import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
208 import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo { @Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49 import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
217 Desired parallelism for the import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
209 a positive integer no default value
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
218 Desired maximum pool size of the underlying fork-join pool for the import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
209 a positive integer, must be greater than or equal to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
217 256 + the value of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
217
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
264 Disable saturation of the underlying fork-join pool for the import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
209 import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo { @Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
} import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49 import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
221 Fully qualified class name of the ParallelExecutionConfigurationStrategy to be used for the import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
210 for example, org.example.CustomStrategy no default value 2.20.2. SynchronizationIn addition to controlling the execution mode using the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
193 annotation, JUnit Jupiter provides another annotation-based declarative synchronization mechanism. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
272 annotation allows you to declare that a test class or method uses a specific shared resource that requires synchronized access to ensure reliable test execution. The shared resource is identified by a unique name which is a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06. The name can be user-defined or one of the predefined constants in
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
274:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
275,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
276,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
277,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
278, or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
279. If the tests in the following example were run in parallel without the use of @ResourceLock, they would be flaky. Sometimes they would pass, and at other times they would fail due to the inherent race condition of writing and then reading the same JVM System Property. When access to shared resources is declared using the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
272 annotation, the JUnit Jupiter engine uses this information to ensure that no conflicting tests are run in parallel. Running tests in isolation If most of your test classes can be run in parallel without any synchronization but you have some test classes that need to run in isolation, you can mark the latter with the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
281 annotation. Tests in such classes are executed sequentially without any other tests running at the same time. In addition to the
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
06 that uniquely identifies the shared resource, you may specify an access mode. Two tests that require
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
283 access to a shared resource may run in parallel with each other but not while any other test that requires
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
284 access to the same shared resource is running.
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
7 2.21. Built-in ExtensionsWhile the JUnit team encourages reusable extensions to be packaged and maintained in separate libraries, the JUnit Jupiter API artifact includes a few user-facing extension implementations that are considered so generally useful that users shouldn’t have to add another dependency. 2.21.1. The TempDirectory ExtensionThe built-in
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
285 extension is used to create and clean up a temporary directory for an individual test or all tests in a test class. It is registered by default. To use it, annotate a non-final, unassigned field of type
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
98 or
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
69 with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
288 or add a parameter of type
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
98 or
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
69 annotated with
@Fast
@Test
void myFastTest() {
// ...
}
50 to a lifecycle method or test method. For example, the following test declares a parameter annotated with
@Fast
@Test
void myFastTest() {
// ...
}
50 for a single test method, creates and writes to a file in the temporary directory, and checks its content. A test method that requires a temporary directory
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
8 You can inject multiple temporary directories by specifying multiple annotated parameters. A test method that requires multiple temporary directories
junit.jupiter.displayname.generator.default = \
org.junit.jupiter.api.DisplayNameGenerator$ReplaceUnderscores
9 To revert to the old behavior of using a single temporary directory for the entire test class or method (depending on which level the annotation is used), you can set the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
293 configuration parameter to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
294. However, please note that this option is deprecated and will be removed in a future release.
@Fast
@Test
void myFastTest() {
// ...
}
50 is not supported on constructor parameters. If you wish to retain a single reference to a temp directory across lifecycle methods and the current test method, please use field injection by annotating an instance field with
@Fast
@Test
void myFastTest() {
// ...
}
50. The following example stores a shared temporary directory in a
@Fast
@Test
void myFastTest() {
// ...
}
28 field. This allows the same
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
298 to be used in all lifecycle methods and test methods of the test class. For better isolation, you should use an instance field so that each test method uses a separate directory. A test class that shares a temporary directory across test methods
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
00 The
@Fast
@Test
void myFastTest() {
// ...
}
50 annotation has an optional
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
300 attribute that can be set to either
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
301,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
302, or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
303. If the cleanup mode is set to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
301, temporary directories are not deleted after a test completes. If it is set to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
302, temporary directories are deleted only after a test completed successfully. The default cleanup mode is
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
303. You can use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
307 to override this default. A test class with a temporary directory that doesn’t get cleaned up
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
01
@Fast
@Test
void myFastTest() {
// ...
}
50 supports the programmatic creation of temporary directories via the optional
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
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public @interface Fast {
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309 attribute. This is typically used to gain control over the temporary directory creation, like defining the parent directory or the file system that should be used. Factories can be created by implementing
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
310. Implementations must provide a no-args constructor and should not make any assumptions regarding when and how many times they are instantiated, but they can assume that their
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
311 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
312 methods will both be called once per instance, in this order, and from the same thread. The default implementation available in Jupiter delegates the directory creation to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
313, passing
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
314 as the prefix string to be used in generating the directory’s name. The following example defines a factory that uses the test name as the directory name prefix instead of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
314 constant value. A test class with a temporary directory having the test name as the directory name prefix
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
02 It’s also possible to use an in-memory file system like
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
316 for the creation of the temporary directory. The following example demonstrates how to achieve that. A test class with a temporary directory created with the Jimfs in-memory file system
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
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03
@Fast
@Test
void myFastTest() {
// ...
}
50 can also be used as a to reduce repetition. The following code listing shows how to create a custom
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
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318 annotation that can be used as a drop-in replacement for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
319. A custom annotation meta-annotated with
@Fast
@Test
void myFastTest() {
// ...
}
50
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
04 The following example demonstrates how to use the custom
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
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318 annotation. A test class using the custom annotation
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
05 Meta-annotations or additional annotations on the field or parameter the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
322 annotation is declared on might expose additional attributes to configure the factory. Such annotations and related attributes can be accessed via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
323 parameter of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
324. You can use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
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325 to specify the fully qualified class name of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
310 you would like to use by default. Just like for factories configured via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
309 attribute of the
@Fast
@Test
void myFastTest() {
// ...
}
50 annotation, the supplied class has to implement the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
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310 interface. The default factory will be used for all
@Fast
@Test
void myFastTest() {
// ...
}
50 annotations unless the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
309 attribute of the annotation specifies a different factory. In summary, the factory for a temporary directory is determined according to the following precedence rules: - The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 309 attribute of the @Fast
@Test
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} - The default
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Target;
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@Target({ ElementType.TYPE, ElementType.METHOD })
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public @interface Fast {
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3. Migrating from JUnit 4Although the JUnit Jupiter programming model and extension model do not support JUnit 4 features such as
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
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336 and
import java.lang.annotation.ElementType;
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import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
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337 natively, it is not expected that source code maintainers will need to update all of their existing tests, test extensions, and custom build test infrastructure to migrate to JUnit Jupiter. Instead, JUnit provides a gentle migration path via a JUnit Vintage test engine which allows existing tests based on JUnit 3 and JUnit 4 to be executed using the JUnit Platform infrastructure. Since all classes and annotations specific to JUnit Jupiter reside under the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
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338 base package, having both JUnit 4 and JUnit Jupiter in the classpath does not lead to any conflicts. It is therefore safe to maintain existing JUnit 4 tests alongside JUnit Jupiter tests. Furthermore, since the JUnit team will continue to provide maintenance and bug fix releases for the JUnit 4.x baseline, developers have plenty of time to migrate to JUnit Jupiter on their own schedule. Make sure that the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
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339 artifact is in your test runtime path. In that case JUnit 3 and JUnit 4 tests will automatically be picked up by the JUnit Platform launcher. See the example projects in the
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import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
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86 repository to find out how this is done with Gradle and Maven. 3.1.1. Categories SupportFor test classes or methods that are annotated with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
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341, the JUnit Vintage test engine exposes the category’s fully qualified class name as a for the corresponding test class or test method. For example, if a test method is annotated with
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342, it will be tagged with
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343. Similar to the
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@Target({ ElementType.TYPE, ElementType.METHOD })
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344 runner in JUnit 4, this information can be used to filter the discovered tests before executing them (see for details). 3.2. Migration TipsThe following are topics that you should be aware of when migrating existing JUnit 4 tests to JUnit Jupiter. - Annotations reside in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
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- Note that you may continue to use assertion methods from
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- Assumptions reside in
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@Fast
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} 15 and @Fast
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} 21 no longer exist; use @Fast
@Test
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} 10 and @Fast
@Test
void myFastTest() { // ...
} @Fast
@Test
void myFastTest() { // ...
} 27 and @Fast
@Test
void myFastTest() { // ...
} 34 no longer exist; use @Fast
@Test
void myFastTest() { // ...
} 22 and @Fast
@Test
void myFastTest() { // ...
} @Fast
@Test
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} 46 no longer exists: use @Fast
@Test
void myFastTest() { // ...
} 45 or one of the other built-in instead import java.lang.annotation.ElementType;
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@Test
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} import java.lang.annotation.ElementType;
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@Test
void myFastTest() { // ...
} import java.lang.annotation.ElementType;
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@Test
void myFastTest() { // ...
} 48 and @Fast
@Test
void myFastTest() { // ...
} -
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} 370 rule no longer exist; use import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
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import org.junit.jupiter.api.Tag;
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} 371 instead. - See if you still need to use
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- Assertions and assumptions in JUnit Jupiter accept the failure message as their last argument instead of the first one.
3.3. Limited JUnit 4 Rule SupportAs stated above, JUnit Jupiter does not and will not support JUnit 4 rules natively. The JUnit team realizes, however, that many organizations, especially large ones, are likely to have large JUnit 4 code bases that make use of custom rules. To serve these organizations and enable a gradual migration path the JUnit team has decided to support a selection of JUnit 4 rules verbatim within JUnit Jupiter. This support is based on adapters and is limited to those rules that are semantically compatible to the JUnit Jupiter extension model, i.e. those that do not completely change the overall execution flow of the test. The
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373 module from JUnit Jupiter currently supports the following three
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374 types including subclasses of these types: import java.lang.annotation.ElementType;
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As in JUnit 4, Rule-annotated fields as well as methods are supported. By using these class-level extensions on a test class such
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374 implementations in legacy code bases can be left unchanged including the JUnit 4 rule import statements. This limited form of
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374 support can be switched on by the class-level annotation
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382. This annotation is a composed annotation which enables all rule migration support extensions:
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383,
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384, and
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import java.lang.annotation.RetentionPolicy;
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@Target({ ElementType.TYPE, ElementType.METHOD })
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385. You may alternatively choose to annotate your test class with
import java.lang.annotation.ElementType;
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386 which registers migration support for rules and JUnit 4’s
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46 annotation (see ). However, if you intend to develop a new extension for JUnit Jupiter please use the new extension model of JUnit Jupiter instead of the rule-based model of JUnit 4. 3.4. JUnit 4 @Ignore SupportIn order to provide a smooth migration path from JUnit 4 to JUnit Jupiter, the
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373 module provides support for JUnit 4’s
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46 annotation analogous to Jupiter’s
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34 annotation. To use
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46 with JUnit Jupiter based tests, configure a test dependency on the
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373 module in your build and then annotate your test class with
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393 or
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394 (which automatically registers the
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395 along with ). The
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395 is an
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397 that disables test classes or test methods that are annotated with
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46.
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06 3.5. Failure Message ArgumentsThe
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399 and
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99 classes in JUnit Jupiter declare arguments in a different order than in JUnit 4. In JUnit 4 assertion and assumption methods accept the failure message as the first argument; whereas, in JUnit Jupiter assertion and assumption methods accept the failure message as the last argument. For instance, the method
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401 in JUnit 4 is declared as
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402, but in JUnit Jupiter it is declared as
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403. The rationale for this is that a failure message is optional, and optional arguments should be declared after required arguments in a method signature. The methods affected by this change are the following: - Assertions
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- Assumptions
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4. Running Tests
4.1. IDE Support
4.1.1. IntelliJ IDEAIntelliJ IDEA supports running tests on the JUnit Platform since version 2016.2. For details please see the post on the IntelliJ IDEA blog. Note, however, that it is recommended to use IDEA 2017.3 or newer since these newer versions of IDEA will download the following JARs automatically based on the API version used in the project:
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416,
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417, and
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339. IntelliJ IDEA releases prior to IDEA 2017.3 bundle specific versions of JUnit 5. Thus, if you want to use a newer version of JUnit Jupiter, execution of tests within the IDE might fail due to version conflicts. In such cases, please follow the instructions below to use a newer version of JUnit 5 than the one bundled with IntelliJ IDEA. In order to use a different JUnit 5 version (e.g., 5.10.1), you may need to include the corresponding versions of the
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416,
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417, and
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339 JARs in the classpath. Additional Gradle Dependencies
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07 Additional Maven Dependencies
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import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
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08 4.1.2. EclipseEclipse IDE offers support for the JUnit Platform since the Eclipse Oxygen.1a (4.7.1a) release. 4.1.3. NetBeans
4.1.4. Visual Studio Code
4.1.5. Other IDEsIf you are using an editor or IDE other than one of those listed in the previous sections, the JUnit team provides two alternative solutions to assist you in using JUnit 5. You can use the manually — for example, from the command line — or execute tests with a if your IDE has built-in support for JUnit 4. 4.2. Build Support
4.2.1. GradleStarting with version 4.6, Gradle provides for executing tests on the JUnit Platform. To enable it, you need to specify
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import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
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422 within a
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423 task declaration in
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88:
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09
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10 Aligning dependency versionsUnless you’re using Spring Boot which defines its own way of managing dependencies, it is recommended to use the JUnit Platform BOM to align the versions of all JUnit 5 artifacts.
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11 Using the BOM allows you to omit the version when declaring dependencies on all artifacts with the
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425,
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338, and
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427 group IDs. See for details on how to override the version of JUnit used in your Spring Boot application. Configuration ParametersThe standard Gradle
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import java.lang.annotation.RetentionPolicy;
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423 task currently does not provide a dedicated DSL to set JUnit Platform to influence test discovery and execution. However, you can provide configuration parameters within the build script via system properties (as shown below) or via the
@FastTest
void myFastTest() {
// ...
}
64 file.
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12 Configuring Test EnginesIn order to run any tests at all, a
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84 implementation must be on the classpath. To configure support for JUnit Jupiter based tests, configure a
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431 dependency on the dependency-aggregating JUnit Jupiter artifact similar to the following.
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13 The JUnit Platform can run JUnit 4 based tests as long as you configure a
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431 dependency on JUnit 4 and a
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433 dependency on the JUnit Vintage
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84 implementation similar to the following.
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import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
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14 Configuring Logging (optional)JUnit uses the Java Logging APIs in the
import java.lang.annotation.ElementType;
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import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
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435 package (a.k.a. JUL) to emit warnings and debug information. Please refer to the official documentation of
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436 for configuration options. Alternatively, it’s possible to redirect log messages to other logging frameworks such as Log4j or Logback. To use a logging framework that provides a custom implementation of
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436, set the
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438 system property to the fully qualified class name of the
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436 implementation to use. The example below demonstrates how to configure Log4j 2.x (see Log4j JDK Logging Adapter for details).
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import java.lang.annotation.RetentionPolicy;
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15 Other logging frameworks provide different means to redirect messages logged using
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435. For example, for Logback you can use the by adding an additional dependency to the runtime classpath. 4.2.2. MavenStarting with version 2.22.0, Maven Surefire and Maven Failsafe provide native support for executing tests on the JUnit Platform. The
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89 file in the
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public @interface Fast {
}
93 project demonstrates how to use the Maven Surefire plugin and can serve as a starting point for configuring your Maven build. Use Maven Surefire/Failsafe 3.0.0-M4 or later to avoid interoperability issues Maven Surefire/Failsafe 3.0.0-M4 introduced support for aligning the version of the JUnit Platform Launcher it uses with the JUnit Platform version found on the test runtime classpath. Therefore, it is recommended to use version 3.0.0-M4 or later to avoid interoperability issues. Alternatively, you can add a test dependency on the matching version of the JUnit Platform Launcher to your Maven build as follows.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
16 Aligning dependency versionsUnless you’re using Spring Boot which defines its own way of managing dependencies, it is recommended to use the JUnit Platform BOM to align the versions of all JUnit 5 artifacts.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
17 Using the BOM allows you to omit the version when declaring dependencies on all artifacts with the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
425,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
338, and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
427 group IDs. See for details on how to override the version of JUnit used in your Spring Boot application. Configuring Test EnginesIn order to have Maven Surefire or Maven Failsafe run any tests at all, at least one
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 implementation must be added to the test classpath. To configure support for JUnit Jupiter based tests, configure
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
423 scoped dependencies on the JUnit Jupiter API and the JUnit Jupiter
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 implementation similar to the following.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
18 Maven Surefire and Maven Failsafe can run JUnit 4 based tests alongside Jupiter tests as long as you configure
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
423 scoped dependencies on JUnit 4 and the JUnit Vintage
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 implementation similar to the following.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
19 Filtering by Test Class NamesThe Maven Surefire Plugin will scan for test classes whose fully qualified names match the following patterns. import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
Moreover, it will exclude all nested classes (including static member classes) by default. Note, however, that you can override this default behavior by configuring explicit
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
455 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
456 rules in your
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
89 file. For example, to keep Maven Surefire from excluding static member classes, you can override its exclude rules as follows. Overriding exclude rules of Maven Surefire
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
20 Filtering by TagsYou can filter tests by or using the following configuration properties. - to include tags or tag expressions, use
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - to exclude tags or tag expressions, use
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
21 Configuration ParametersYou can set JUnit Platform to influence test discovery and execution by declaring the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
460 property and providing key-value pairs using the Java
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
461 file syntax (as shown below) or via the
@FastTest
void myFastTest() {
// ...
}
64 file.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
22 4.2.3. AntStarting with version
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
463, Ant has a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
464 task that provides native support for launching tests on the JUnit Platform. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
464 task is solely responsible for launching the JUnit Platform and passing it the selected collection of tests. The JUnit Platform then delegates to registered test engines to discover and execute the tests. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
464 task attempts to align as closely as possible with native Ant constructs such as for allowing users to select the tests that they want executed by test engines. This gives the task a consistent and natural feel when compared to many other core Ant tasks. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
467 file in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
94 project demonstrates how to use the task and can serve as a starting point. Basic UsageThe following example demonstrates how to configure the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
464 task to select a single test class (i.e.,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
470).
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
23 The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
423 element allows you to specify a single test class that you want to be selected and executed. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
091 element allows you to specify the classpath to be used to launch the JUnit Platform. This classpath will also be used to locate test classes that are part of the execution. The following example demonstrates how to configure the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
464 task to select test classes from multiple locations.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
24 In the above example, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
474 element allows you to select multiple test classes that reside in different locations. For further details on usage and configuration options please refer to the official Ant documentation for the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
464 task. 4.2.4. Spring BootSpring Boot provides automatic support for managing the version of JUnit used in your project. In addition, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
476 artifact automatically includes testing libraries such as JUnit Jupiter, AssertJ, Mockito, etc. If your build relies on dependency management support from Spring Boot, you should not import the in your build script since that will result in duplicate (and potentially conflicting) management of JUnit dependencies. If you need to override the version of a dependency used in your Spring Boot application, you have to override the exact name of the defined in the BOM used by the Spring Boot plugin. For example, the name of the JUnit Jupiter version property in Spring Boot is
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
478. The mechanism for changing a dependency version is documented for both and . With Gradle you can override the JUnit Jupiter version by including the following in your
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
88 file.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
25 With Maven you can override the JUnit Jupiter version by including the following in your
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
89 file.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
26 4.3. Console LauncherThe
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
481 is a command-line Java application that lets you launch the JUnit Platform from the console. For example, it can be used to run JUnit Vintage and JUnit Jupiter tests and print test execution results to the console. An executable
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
482 with all dependencies included is published in the Maven Central repository under the junit-platform-console-standalone directory. It includes the following dependencies: import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
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@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
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} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
You can run the standalone
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
80 as shown below.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
27 You can also run the standalone
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
80 as shown below (for example, to include all jars in a directory):
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
28 Exit Code The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
481 exits with a status code of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
41 if any containers or tests failed. If no tests are discovered and the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
504 command-line option is supplied, the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
80 exits with a status code of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
42. Otherwise, the exit code is
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
4.3.1. Subcommands and Optionsimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
29 Discovering testsimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
30 Executing testsimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
31 Listing test enginesimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
32 4.3.2. Argument Files (@-files)On some platforms you may run into system limitations on the length of a command line when creating a command line with lots of options or with long arguments. Since version 1.3, the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
80 supports argument files, also known as @-files. Argument files are files that themselves contain arguments to be passed to the command. When the underlying picocli command line parser encounters an argument beginning with the character
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
509, it expands the contents of that file into the argument list. The arguments within a file can be separated by spaces or newlines. If an argument contains embedded whitespace, the whole argument should be wrapped in double or single quotes — for example,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
510. If the argument file does not exist or cannot be read, the argument will be treated literally and will not be removed. This will likely result in an "unmatched argument" error message. You can troubleshoot such errors by executing the command with the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
511 system property set to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
512. Multiple @-files may be specified on the command line. The specified path may be relative to the current directory or absolute. You can pass a real parameter with an initial
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
509 character by escaping it with an additional
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
509 symbol. For example,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
515 will become
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
516 and will not be subject to expansion. 4.3.3. Color customizationThe colors used in the output of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
481 can be customized. The option
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
518 will apply a built-in monochrome style, while
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
519 will accept a properties file to override the color styling. The properties file below demonstrates the default style:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
33 The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
520 runner has been deprecated The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
520 runner was developed by the JUnit team as an interim solution for running test suites and tests on the JUnit Platform in a JUnit 4 environment. In recent years, all mainstream build tools and IDEs provide built-in support for running tests directly on the JUnit Platform. In addition, the introduction of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
522 support provided by the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
523 module makes the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
520 runner obsolete. See for details. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
520 runner and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
526 annotation have therefore been deprecated in JUnit Platform 1.8 and will be removed in JUnit Platform 2.0. If you are using the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
520 runner, please migrate to the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
522 support. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
520 runner is a JUnit 4 based
@FastTest
void myFastTest() {
// ...
}
80 which enables you to run any test whose programming model is supported on the JUnit Platform in a JUnit 4 environment — for example, a JUnit Jupiter test class. Annotating a class with
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
15 allows it to be run with IDEs and build systems that support JUnit 4 but do not yet support the JUnit Platform directly. Since the JUnit Platform has features that JUnit 4 does not have, the runner is only able to support a subset of the JUnit Platform functionality, especially with regard to reporting (see ). 4.4.1. SetupYou need the following artifacts and their dependencies on the classpath. See for details regarding group IDs, artifact IDs, and versions. Explicit Dependencies
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 532 in test scope: location of the import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 96 in test scope: API for writing tests using JUnit Jupiter, including import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 417 in test runtime scope: implementation of the import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
Transitive Dependencies
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
4.4.2. Display Names vs. Technical NamesTo define a custom display name for the class run via
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
15 annotate the class with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
546 and provide a custom value. By default, display names will be used for test artifacts; however, when the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
520 runner is used to execute tests with a build tool such as Gradle or Maven, the generated test report often needs to include the technical names of test artifacts — for example, fully qualified class names — instead of shorter display names like the simple name of a test class or a custom display name containing special characters. To enable technical names for reporting purposes, declare the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
526 annotation alongside
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
15. Note that the presence of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
526 overrides any custom display name configured via
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
546. 4.4.3. Single Test ClassOne way to use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
520 runner is to annotate a test class with
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
15 directly. Please note that the test methods in the following example are annotated with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
554 (JUnit Jupiter), not
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
555 (JUnit 4). Moreover, in this case the test class must be
@Fast
@Test
void myFastTest() {
// ...
}
64; otherwise, some IDEs and build tools might not recognize it as a JUnit 4 test class.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
34 4.4.4. Test SuiteIf you have multiple test classes you can create a test suite as can be seen in the following example.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
35 The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
557 will discover and run all tests in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
558 package and its subpackages. By default, it will only include test classes whose names either begin with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
559 or end with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
559 or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
561. Additional Configuration Options There are more configuration options for discovering and filtering tests than just
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
562. Please consult the Javadoc of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
563 package for further details. Test classes and suites annotated with
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
15 cannot be executed directly on the JUnit Platform (or as a "JUnit 5" test as documented in some IDEs). Such classes and suites can only be executed using JUnit 4 infrastructure. 4.5. Configuration ParametersIn addition to instructing the platform which test classes and test engines to include, which packages to scan, etc., it is sometimes necessary to provide additional custom configuration parameters that are specific to a particular test engine, listener, or registered extension. For example, the JUnit Jupiter
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 supports configuration parameters for the following use cases. Configuration Parameters are text-based key-value pairs that can be supplied to test engines running on the JUnit Platform via one of the following mechanisms. - The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 566 and import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 567 methods in the import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 568 which is used to build a request supplied to the . When running tests via one of the tools provided by the JUnit Platform you can specify configuration parameters as follows: - : use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - : use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 571 or import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - : use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
- JVM system properties.
- The JUnit Platform configuration file: a file named
@FastTest
void myFastTest() { // ...
} 64 in the root of the class path that follows the syntax rules for a Java import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
Configuration parameters are looked up in the exact order defined above. Consequently, configuration parameters supplied directly to the
@FastTest
void myFastTest() {
// ...
}
60 take precedence over those supplied via system properties and the configuration file. Similarly, configuration parameters supplied via system properties take precedence over those supplied via the configuration file. 4.5.1. Pattern Matching SyntaxThis section describes the pattern matching syntax that is applied to the configuration parameters used for the following features. If the value for the given configuration parameter consists solely of an asterisk (
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
577), the pattern will match against all candidate classes. Otherwise, the value will be treated as a comma-separated list of patterns where each pattern will be matched against the fully qualified class name (FQCN) of each candidate class. Any dot (
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
- in a pattern will match against a dot (
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
- or a dollar sign (
+-- DisplayNameGeneratorDemo [OK]
+-- A year is not supported [OK]
| +-- A negative value for year is not supported by the leap year computation. [OK]
| | +-- For example, year -1 is not supported. [OK]
| | '-- For example, year -4 is not supported. [OK]
| '-- if it is zero() [OK]
'-- A year is a leap year [OK]
+-- A year is a leap year -> if it is divisible by 4 but not by 100. [OK]
'-- A year is a leap year -> if it is one of the following years. [OK]
+-- Year 2016 is a leap year. [OK]
+-- Year 2020 is a leap year. [OK]
'-- Year 2048 is a leap year. [OK]
- in a FQCN. Any asterisk (
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
- will match against one or more characters in a FQCN. All other characters in a pattern will be matched one-to-one against a FQCN.
Examples: import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 583: matches all candidate classes under the import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 585: matches every candidate class whose simple class name is exactly import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 587: matches every candidate class whose FQCN contains import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 589: matches every candidate class whose FQCN contains import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 588 or import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 592: matches the candidate class whose FQCN is exactly import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 594: matches candidate classes whose FQCN is exactly import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 592 or import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
4.6. TagsTags are a JUnit Platform concept for marking and filtering tests. The programming model for adding tags to containers and tests is defined by the testing framework. For example, in JUnit Jupiter based tests, the
@Fast
@Test
void myFastTest() {
// ...
}
44 annotation (see ) should be used. For JUnit 4 based tests, the Vintage engine maps
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
341 annotations to tags (see ). Other testing frameworks may define their own annotation or other means for users to specify tags. 4.6.1. Syntax Rules for TagsRegardless how a tag is specified, the JUnit Platform enforces the following rules: - A tag must not be
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} - A trimmed tag must not contain whitespace.
- A trimmed tag must not contain ISO control characters.
- A trimmed tag must not contain any of the following reserved characters.
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo { @Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
In the above context, "trimmed" means that leading and trailing whitespace characters have been removed. 4.6.2. Tag ExpressionsTag expressions are boolean expressions with the operators
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
605,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
603 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
604. In addition,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
601 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
602 can be used to adjust for operator precedence. Two special expressions are supported,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
611 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
612, which select all tests with any tags at all, and all tests without any tags, respectively. These special expressions may be combined with other expressions just like normal tags. Table 2. Operators (in descending order of precedence) Operator Meaning Associativity
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
605 not right
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
603 and left
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
604 or left If you are tagging your tests across multiple dimensions, tag expressions help you to select which tests to execute. When tagging by test type (e.g., micro, integration, end-to-end) and feature (e.g., product, catalog, shipping), the following tag expressions can be useful. Tag Expression Selection
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
616 all tests for product
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
617 all tests for catalog plus all tests for shipping
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
618 all tests for the intersection between catalog and shipping
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
619 all tests for product, but not the end-to-end tests
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
620 all micro or integration tests for product or shipping 4.7. Capturing Standard Output/ErrorSince version 1.3, the JUnit Platform provides opt-in support for capturing output printed to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
621 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
622. To enable it, set the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
623 and/or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
624 to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49. In addition, you may configure the maximum number of buffered bytes to be used per executed test or container using
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
626. If enabled, the JUnit Platform captures the corresponding output and publishes it as a report entry using the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
13 or
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
14 keys to all registered
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
11 instances immediately before reporting the test or container as finished. Please note that the captured output will only contain output emitted by the thread that was used to execute a container or test. Any output by other threads will be omitted because particularly when it would be impossible to attribute it to a specific test or container. 4.8. Using Listeners and InterceptorsThe JUnit Platform provides the following listener APIs that allow JUnit, third parties, and custom user code to react to events fired at various points during the discovery and execution of a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
630. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
637 API is typically implemented by build tools or IDEs and registered automatically for you in order to support some feature of the build tool or IDE. The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
638 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
639 APIs are often implemented in order to produce some form of report or to display a graphical representation of the test plan in an IDE. Such listeners may be implemented and automatically registered by a build tool or IDE, or they may be included in a third-party library – potentially registered for you automatically. You can also implement and register your own listeners. For details on registering and configuring listeners, see the following sections of this guide. The JUnit Platform provides the following listeners which you may wish to use with your test suite.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
640 can be used via the or registered manually to generate XML reports compatible with the de facto standard for JUnit 4 based test reports.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
641 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
642 that generate Java Flight Recorder events during test discovery and execution.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
643
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
639 for logging informational messages for all events via a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
645 that consumes
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
646 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
647.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
648
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
639 that generates a summary of the test execution which can be printed via a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
650.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
651
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
639 that that tracks the unique IDs of all tests that were skipped or executed during the execution of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
630 and generates a file containing the unique IDs once execution of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
630 has finished. 4.8.1. Flight Recorder SupportSince version 1.7, the JUnit Platform provides opt-in support for generating Flight Recorder events. JEP 328 describes the Java Flight Recorder (JFR) as: Flight Recorder records events originating from applications, the JVM and the OS. Events are stored in a single file that can be attached to bug reports and examined by support engineers, allowing after-the-fact analysis of issues in the period leading up to a problem. In order to record Flight Recorder events generated while running tests, you need to: - Ensure that you are using either Java 8 Update 262 or higher or Java 11 or later.
- Provide the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 655 module ( import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - on the class-path or module-path at test runtime.
- Start flight recording when launching a test run. Flight Recorder can be started via java command line option:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
Please consult the manual of your build tool for the appropriate commands. To analyze the recorded events, use the jfr command line tool shipped with recent JDKs or open the recording file with JDK Mission Control. Flight Recorder support is currently an experimental feature. You’re invited to give it a try and provide feedback to the JUnit team so they can improve and eventually this feature. 4.9. Stack Trace PruningSince version 1.10, the JUnit Platform provides built-in support for pruning stack traces produced by failing tests. This feature is enabled by default but can be disabled by setting the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
657 configuration parameter to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
24. When enabled, all calls from the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
584,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
660, and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
661 packages are removed from the stack trace, unless the calls occur after the test itself or any of its ancestors. For that reason, calls to
@Fast
@Test
void myFastTest() {
// ...
}
96 or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
21 will never be excluded. In addition, all elements prior to and including the first call from the JUnit Platform Launcher will be removed. 5. Extension Model
5.1. OverviewIn contrast to the competing
@FastTest
void myFastTest() {
// ...
}
80,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
665, and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
666 extension points in JUnit 4, the JUnit Jupiter extension model consists of a single, coherent concept: the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
667 API. Note, however, that
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
667 itself is just a marker interface. 5.2. Registering Extensions
5.2.1. Declarative Extension RegistrationDevelopers can register one or more extensions declaratively by annotating a test interface, test class, test method, or custom with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
669 and supplying class references for the extensions to register. As of JUnit Jupiter 5.8,
@Fast
@Test
void myFastTest() {
// ...
}
48 may also be declared on fields or on parameters in test class constructors, in test methods, and in
@Fast
@Test
void myFastTest() {
// ...
}
22,
@Fast
@Test
void myFastTest() {
// ...
}
29,
@Fast
@Test
void myFastTest() {
// ...
}
10, and
@Fast
@Test
void myFastTest() {
// ...
}
16 lifecycle methods. For example, to register a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
675 for a particular test method, you would annotate the test method as follows. We assume the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
675 starts a local web server and injects the server’s URL into parameters annotated with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
677.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
37 To register the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
675 for all tests in a particular class and its subclasses, you would annotate the test class as follows.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
38 Multiple extensions can be registered together like this:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
39 As an alternative, multiple extensions can be registered separately like this:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
40 Extension Registration Order Extensions registered declaratively via
@Fast
@Test
void myFastTest() {
// ...
}
48 at the class level, method level, or parameter level will be executed in the order in which they are declared in the source code. For example, the execution of tests in both
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
680 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
681 will be extended by the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
682 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
675, in exactly that order. If you wish to combine multiple extensions in a reusable way, you can define a custom and use
@Fast
@Test
void myFastTest() {
// ...
}
48 as a meta-annotation as in the following code listing. Then
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
685 can be used in place of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
686.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
41 The above examples demonstrate how
@Fast
@Test
void myFastTest() {
// ...
}
48 can be applied at the class level or at the method level; however, for certain use cases it makes sense for an extension to be registered declaratively at the field or parameter level. Consider a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
688 which generates random numbers that can be injected into a field or via a parameter in a constructor, test method, or lifecycle method. If the extension provides a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
689 annotation that is meta-annotated with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
690 (see listing below), the extension can be used transparently as in the following
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
691 example.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
42
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
43 The following code listing provides an example of how one might choose to implement such a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
688. This implementation works for the use cases in
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
691; however, it may not prove robust enough to cover all use cases — for example, the random number generation support is limited to integers; it uses
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
694 instead of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
695; etc. In any case, it is important to note which extension APIs are implemented and for what reasons. Specifically,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
688 implements the following extension APIs: import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} @FastTest
void myFastTest() { // ...
}
Ideally, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
688 would implement
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
701 instead of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
698 in order to support non-static field injection immediately after the test class has been instantiated. However, JUnit Jupiter currently does not allow a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
701 to be registered via
@Fast
@Test
void myFastTest() {
// ...
}
48 on a non-static field (see issue 3437). In light of that, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
688 implements
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
698 as an alternative approach.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
44 Extension Registration Order for
@Fast
@Test
void myFastTest() {
// ...
}
48 on Fields Extensions registered declaratively via
@Fast
@Test
void myFastTest() {
// ...
}
48 on fields will be ordered relative to
@Fast
@Test
void myFastTest() {
// ...
}
49 fields and other
@Fast
@Test
void myFastTest() {
// ...
}
48 fields using an algorithm that is deterministic but intentionally nonobvious. However,
@Fast
@Test
void myFastTest() {
// ...
}
48 fields can be ordered using the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
96 annotation. See the tip for
@Fast
@Test
void myFastTest() {
// ...
}
49 fields for details.
@Fast
@Test
void myFastTest() {
// ...
}
48 fields may be either
@Fast
@Test
void myFastTest() {
// ...
}
28 or non-static. The documentation on and for
@Fast
@Test
void myFastTest() {
// ...
}
49 fields also applies to
@Fast
@Test
void myFastTest() {
// ...
}
48 fields. 5.2.2. Programmatic Extension RegistrationDevelopers can register extensions programmatically by annotating fields in test classes with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
718. When an extension is registered declaratively via , it can typically only be configured via annotations. In contrast, when an extension is registered via
@Fast
@Test
void myFastTest() {
// ...
}
49, it can be configured programmatically — for example, in order to pass arguments to the extension’s constructor, a static factory method, or a builder API. Extension Registration Order By default, extensions registered programmatically via
@Fast
@Test
void myFastTest() {
// ...
}
49 or declaratively via
@Fast
@Test
void myFastTest() {
// ...
}
48 on fields will be ordered using an algorithm that is deterministic but intentionally nonobvious. This ensures that subsequent runs of a test suite execute extensions in the same order, thereby allowing for repeatable builds. However, there are times when extensions need to be registered in an explicit order. To achieve that, annotate
@Fast
@Test
void myFastTest() {
// ...
}
49 fields or
@Fast
@Test
void myFastTest() {
// ...
}
48 fields with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
92. Any
@Fast
@Test
void myFastTest() {
// ...
}
49 field or
@Fast
@Test
void myFastTest() {
// ...
}
48 field not annotated with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
96 will be ordered using the default order which has a value of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
729. This allows
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
96 annotated extension fields to be explicitly ordered before or after non-annotated extension fields. Extensions with an explicit order value less than the default order value will be registered before non-annotated extensions. Similarly, extensions with an explicit order value greater than the default order value will be registered after non-annotated extensions. For example, assigning an extension an explicit order value that is greater than the default order value allows before callback extensions to be registered last and after callback extensions to be registered first, relative to other programmatically registered extensions.
@Fast
@Test
void myFastTest() {
// ...
}
49 fields must not be
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
44 (at evaluation time) but may be either
@Fast
@Test
void myFastTest() {
// ...
}
28 or non-static. Static FieldsIf a
@Fast
@Test
void myFastTest() {
// ...
}
49 field is
@Fast
@Test
void myFastTest() {
// ...
}
28, the extension will be registered after extensions that are registered at the class level via
@Fast
@Test
void myFastTest() {
// ...
}
48. Such static extensions are not limited in which extension APIs they can implement. Extensions registered via static fields may therefore implement class-level and instance-level extension APIs such as
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
697,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
738,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
701, and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
740 as well as method-level extension APIs such as
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
698, etc. In the following example, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
742 field in the test class is initialized programmatically by using a builder pattern supported by the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
675. The configured
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
675 will be automatically registered as an extension at the class level — for example, in order to start the server before all tests in the class and then stop the server after all tests in the class have completed. In addition, static lifecycle methods annotated with
@Fast
@Test
void myFastTest() {
// ...
}
22 or
@Fast
@Test
void myFastTest() {
// ...
}
29 as well as
@Fast
@Test
void myFastTest() {
// ...
}
10,
@Fast
@Test
void myFastTest() {
// ...
}
16, and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 methods can access the instance of the extension via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
742 field if necessary. Registering an extension via a static field in Java
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
45 Static Fields in Kotlin The Kotlin programming language does not have the concept of a
@Fast
@Test
void myFastTest() {
// ...
}
28 field. However, the compiler can be instructed to generate a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
752 field using the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
753 annotation in Kotlin. If you want the Kotlin compiler to generate a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
754 field, you can use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
755 annotation instead. The following example is a version of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
756 from the previous section that has been ported to Kotlin. Registering an extension via a static field in Kotlin
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
46 Instance FieldsIf a
@Fast
@Test
void myFastTest() {
// ...
}
49 field is non-static (i.e., an instance field), the extension will be registered after the test class has been instantiated and after each registered
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
701 has been given a chance to post-process the test instance (potentially injecting the instance of the extension to be used into the annotated field). Thus, if such an instance extension implements class-level or instance-level extension APIs such as
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
697,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
738, or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
701, those APIs will not be honored. By default, an instance extension will be registered after extensions that are registered at the method level via
@Fast
@Test
void myFastTest() {
// ...
}
48; however, if the test class is configured with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
84 semantics, an instance extension will be registered before extensions that are registered at the method level via
@Fast
@Test
void myFastTest() {
// ...
}
48. In the following example, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
765 field in the test class is initialized programmatically by invoking a custom
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
766 method and supplying the result to the static
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
767 factory method in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
768. The configured
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
768 will be automatically registered as an extension at the method level. In addition,
@Fast
@Test
void myFastTest() {
// ...
}
10,
@Fast
@Test
void myFastTest() {
// ...
}
16, and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 methods can access the instance of the extension via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
765 field if necessary. An extension registered via an instance field
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
47 5.2.3. Automatic Extension RegistrationIn addition to and support using annotations, JUnit Jupiter also supports global extension registration via Java’s
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
774 mechanism, allowing third-party extensions to be auto-detected and automatically registered based on what is available in the classpath. Specifically, a custom extension can be registered by supplying its fully qualified class name in a file named
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
775 within the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
776 folder in its enclosing JAR file. Enabling Automatic Extension DetectionAuto-detection is an advanced feature and is therefore not enabled by default. To enable it, set the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
777 configuration parameter to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49. This can be supplied as a JVM system property, as a configuration parameter in the
@FastTest
void myFastTest() {
// ...
}
59 that is passed to the
@FastTest
void myFastTest() {
// ...
}
60, or via the JUnit Platform configuration file (see for details). For example, to enable auto-detection of extensions, you can start your JVM with the following system property.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
781 When auto-detection is enabled, extensions discovered via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
774 mechanism will be added to the extension registry after JUnit Jupiter’s global extensions (e.g., support for
@FastTest
void myFastTest() {
// ...
}
86,
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
08, etc.). 5.2.4. Extension InheritanceRegistered extensions are inherited within test class hierarchies with top-down semantics. Similarly, extensions registered at the class-level are inherited at the method-level. Furthermore, a specific extension implementation can only be registered once for a given extension context and its parent contexts. Consequently, any attempt to register a duplicate extension implementation will be ignored. 5.3. Conditional Test Executionimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
397 defines the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
667 API for programmatic, conditional test execution. An
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
32 is evaluated for each container (e.g., a test class) to determine if all the tests it contains should be executed based on the supplied
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
70. Similarly, an
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
32 is evaluated for each test to determine if a given test method should be executed based on the supplied
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
70. When multiple
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
32 extensions are registered, a container or test is disabled as soon as one of the conditions returns disabled. Thus, there is no guarantee that a condition is evaluated because another extension might have already caused a container or test to be disabled. In other words, the evaluation works like the short-circuiting boolean OR operator. 5.3.1. Deactivating ConditionsSometimes it can be useful to run a test suite without certain conditions being active. For example, you may wish to run tests even if they are annotated with
@Fast
@Test
void myFastTest() {
// ...
}
45 in order to see if they are still broken. To do this, provide a pattern for the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
793 configuration parameter to specify which conditions should be deactivated (i.e., not evaluated) for the current test run. The pattern can be supplied as a JVM system property, as a configuration parameter in the
@FastTest
void myFastTest() {
// ...
}
59 that is passed to the
@FastTest
void myFastTest() {
// ...
}
60, or via the JUnit Platform configuration file (see for details). For example, to deactivate JUnit’s
@Fast
@Test
void myFastTest() {
// ...
}
45 condition, you can start your JVM with the following system property.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
797 Pattern Matching Syntax
5.4. Test Instance Pre-construct CallbackThis extension provides a symmetric call to
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
798 and is useful in combination with other extensions to prepare constructor parameters or keeping track of test instances and their lifecycle. 5.5. Test Instance Factoriesimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
799 defines the API for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
800 that wish to create test class instances. Common use cases include acquiring the test instance from a dependency injection framework or invoking a static factory method to create the test class instance. If no
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
801 is registered, the framework will invoke the sole constructor for the test class to instantiate it, potentially resolving constructor arguments via registered
@FastTest
void myFastTest() {
// ...
}
82 extensions. Extensions that implement
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
801 can be registered on test interfaces, top-level test classes, or
@Fast
@Test
void myFastTest() {
// ...
}
04 test classes. Registering multiple extensions that implement
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
801 for any single class will result in an exception being thrown for all tests in that class, in any subclass, and in any nested class. Note that any
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
801 registered in a superclass or enclosing class (i.e., in the case of a
@Fast
@Test
void myFastTest() {
// ...
}
04 test class) is inherited. It is the user’s responsibility to ensure that only a single
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
801 is registered for any specific test class. 5.6. Test Instance Post-processingCommon use cases include injecting dependencies into the test instance, invoking custom initialization methods on the test instance, etc. 5.7. Test Instance Pre-destroy Callbackimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
798 defines the API for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
800 that wish to process test instances after they have been used in tests and before they are destroyed. Common use cases include cleaning dependencies that have been injected into the test instance, invoking custom de-initialization methods on the test instance, etc. 5.8. Parameter Resolution@FastTest
void myFastTest() {
// ...
}
81 defines the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
667 API for dynamically resolving parameters at runtime. If a test class constructor, test method, or lifecycle method (see ) declares a parameter, the parameter must be resolved at runtime by a
@FastTest
void myFastTest() {
// ...
}
82. A
@FastTest
void myFastTest() {
// ...
}
82 can either be built-in (see
@FastTest
void myFastTest() {
// ...
}
- or . Generally speaking, parameters may be resolved by name, type, annotation, or any combination thereof.
If you wish to implement a custom
@FastTest
void myFastTest() {
// ...
}
81 that resolves parameters based solely on the type of the parameter, you may find it convenient to extend the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
24 which serves as a generic adapter for such use cases. Due to a bug in the byte code generated by
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
818 on JDK versions prior to JDK 9, looking up annotations on parameters directly via the core
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
819 API will always fail for inner class constructors (e.g., a constructor in a
@Fast
@Test
void myFastTest() {
// ...
}
04 test class). The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
821 API supplied to
@FastTest
void myFastTest() {
// ...
}
82 implementations therefore includes the following convenience methods for correctly looking up annotations on parameters. Extension authors are strongly encouraged to use these methods instead of those provided in
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
819 in order to avoid this bug in the JDK. import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
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Other extensions can also leverage registered
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051 for method and constructor invocations, using the
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828 available via the
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829 method in the
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70. 5.9. Test Result Processingimport java.lang.annotation.ElementType;
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831 defines the API for extensions that wish to process the results of test method executions. Specifically, a
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832 will be invoked with contextual information for the following events. import java.lang.annotation.ElementType;
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In contrast to the definition of "test method" presented in , in this context test method refers to any
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97 method or
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02 method (for example, a
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99). Extensions implementing this interface can be registered at the class level, instance level, or method level. When registered at the class level, a
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832 will be invoked for any contained test method including those in
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04 classes. When registered at the method level, a
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832 will only be invoked for the test method for which it was registered. If a
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832 is registered via a non-static (instance) field – for example, using
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49 – and the test class is configured with
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846 semantics (which is the default lifecycle mode), the
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832 will not be invoked with events for
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02 methods (for example,
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00 or
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99). To ensure that a
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832 is invoked for all test methods in a given class, it is therefore recommended that the
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832 be registered at the class level with
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48 or via a
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28 field with
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49 or
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48. If there is a failure at the class level — for example, an exception thrown by a
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22 method — no test results will be reported. Similarly, if the test class is disabled via an
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32 — for example,
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45 — no test results will be reported. In contrast to other Extension APIs, a
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832 is not permitted to adversely influence the execution of tests. Consequently, any exception thrown by a method in the
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832 API will be logged at
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862 level and will not be allowed to propagate or fail test execution. Any instances of
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863 stored in the
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864 of the provided
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865 will be closed before methods in the
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832 API are invoked (see ). You can use the parent context’s
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864 to work with such resources. 5.10. Test Lifecycle CallbacksThe following interfaces define the APIs for extending tests at various points in the test execution lifecycle. Consult the following sections for examples and the Javadoc for each of these interfaces in the
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868 package for further details. import java.lang.annotation.ElementType;
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871
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Implementing Multiple Extension APIs Extension developers may choose to implement any number of these interfaces within a single extension. Consult the source code of the
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875 for a concrete example. 5.10.1. Before and After Test Execution Callbacksimport java.lang.annotation.ElementType;
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871 and
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872 define the APIs for
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800 that wish to add behavior that will be executed immediately before and immediately after a test method is executed, respectively. As such, these callbacks are well suited for timing, tracing, and similar use cases. If you need to implement callbacks that are invoked around
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10 and
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16 methods, implement
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698 and
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
21 instead. The following example shows how to use these callbacks to calculate and log the execution time of a test method.
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883 implements both
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884 and
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885 in order to time and log the test execution. An extension that times and logs the execution of test methods
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48 Since the
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886 class registers the
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883 via
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48, its tests will have this timing applied when they execute. A test class that uses the example TimingExtension
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49 The following is an example of the logging produced when
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886 is run.
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50 5.11. Exception HandlingExceptions thrown during the test execution may be intercepted and handled accordingly before propagating further, so that certain actions like error logging or resource releasing may be defined in specialized
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800. JUnit Jupiter offers API for
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800 that wish to handle exceptions thrown during
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97 methods via
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893 and for those thrown during one of test lifecycle methods (
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void myFastTest() {
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22,
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10,
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16 and
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void myFastTest() {
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- via
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898. The following example shows an extension which will swallow all instances of
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899 but rethrow any other type of exception. An exception handling extension that filters IOExceptions in test execution
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51 Another example shows how to record the state of an application under test exactly at the point of unexpected exception being thrown during setup and cleanup. Note that unlike relying on lifecycle callbacks, which may or may not be executed depending on the test status, this solution guarantees execution immediately after failing
@Fast
@Test
void myFastTest() {
// ...
}
22,
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}
10,
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}
16 or
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}
29. An exception handling extension that records application state on error
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@Tag("fast")
public @interface Fast {
}
52 Multiple execution exception handlers may be invoked for the same lifecycle method in order of declaration. If one of the handlers swallows the handled exception, subsequent ones will not be executed, and no failure will be propagated to JUnit engine, as if the exception was never thrown. Handlers may also choose to rethrow the exception or throw a different one, potentially wrapping the original. Extensions implementing
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
898 that wish to handle exceptions thrown during
@Fast
@Test
void myFastTest() {
// ...
}
22 or
@Fast
@Test
void myFastTest() {
// ...
}
29 need to be registered on a class level, while handlers for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
907 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
908 may be also registered for individual test methods. Registering multiple exception handling extensions
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
53 5.12. Intercepting Invocationsimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
909 defines the API for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
800 that wish to intercept calls to test code. The following example shows an extension that executes all test methods in Swing’s Event Dispatch Thread. An extension that executes tests in a user-defined thread
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
54 5.13. Providing Invocation Contexts for Test TemplatesA
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
023 method can only be executed when at least one
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
024 is registered. Each such provider is responsible for providing a
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
94 of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
914 instances. Each context may specify a custom display name and a list of additional extensions that will only be used for the next invocation of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
023 method. A test template with accompanying extension
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
55 In this example, the test template will be invoked twice. The display names of the invocations will be
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
916 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
917 as specified by the invocation context. Each invocation registers a custom
@FastTest
void myFastTest() {
// ...
}
81 which is used to resolve the method parameter. The output when using the
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
80 is as follows.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
56 The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
024 extension API is primarily intended for implementing different kinds of tests that rely on repetitive invocation of a test-like method albeit in different contexts — for example, with different parameters, by preparing the test class instance differently, or multiple times without modifying the context. Please refer to the implementations of or which use this extension point to provide their functionality. 5.14. Keeping State in ExtensionsUsually, an extension is instantiated only once. So the question becomes relevant: How do you keep the state from one invocation of an extension to the next? The
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
70 API provides a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
864 exactly for this purpose. Extensions may put values into a store for later retrieval. See the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
923 for an example of using the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
864 with a method-level scope. It is important to remember that values stored in an
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
70 during test execution will not be available in the surrounding
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
70. Since
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
927 may be nested, the scope of inner contexts may also be limited. Consult the corresponding Javadoc for details on the methods available for storing and retrieving values via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
928.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
863 An extension context store is bound to its extension context lifecycle. When an extension context lifecycle ends it closes its associated store. All stored values that are instances of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
930 are notified by an invocation of their
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
312 method in the inverse order they were added in. 5.15. Supported Utilities in ExtensionsThe
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
543 artifact exposes a package named
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
933 that contains maintained utility methods for working with annotations, classes, reflection, and classpath scanning tasks.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
667 authors are encouraged to use these supported methods in order to align with the behavior of the JUnit Platform. 5.15.1. Annotation Supportimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
936 provides static utility methods that operate on annotated elements (e.g., packages, annotations, classes, interfaces, constructors, methods, and fields). These include methods to check whether an element is annotated or meta-annotated with a particular annotation, to search for specific annotations, and to find annotated methods and fields in a class or interface. Some of these methods search on implemented interfaces and within class hierarchies to find annotations. Consult the Javadoc for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
937 for further details. 5.15.2. Class Supportimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
938 provides static utility methods for working with classes (i.e., instances of
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
39). Consult the Javadoc for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
940 for further details. 5.15.3. Reflection Supportimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
941 provides static utility methods that augment the standard JDK reflection and class-loading mechanisms. These include methods to scan the classpath in search of classes matching specified predicates, to load and create new instances of a class, and to find and invoke methods. Some of these methods traverse class hierarchies to locate matching methods. Consult the Javadoc for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
942 for further details. 5.15.4. Modifier Supportimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
943 provides static utility methods for working with member and class modifiers — for example, to determine if a member is declared as
@Fast
@Test
void myFastTest() {
// ...
}
64,
@Fast
@Test
void myFastTest() {
// ...
}
65,
@Fast
@Test
void myFastTest() {
// ...
}
62,
@Fast
@Test
void myFastTest() {
// ...
}
28, etc. Consult the Javadoc for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
948 for further details. 5.16. Relative Execution Order of User Code and ExtensionsWhen executing a test class that contains one or more test methods, a number of extension callbacks are called in addition to the user-supplied test and lifecycle methods. 5.16.1. User and Extension CodeThe following diagram illustrates the relative order of user-supplied code and extension code. User-supplied test and lifecycle methods are shown in orange, with callback code implemented by extensions shown in blue. The grey box denotes the execution of a single test method and will be repeated for every test method in the test class. User code and extension code Step Interface/Annotation Description 1 interface
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
949 extension code executed before all tests of the container are executed 2 annotation
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
950 user code executed before all tests of the container are executed 3 interface
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
951 extension code for handling exceptions thrown from
@Fast
@Test
void myFastTest() {
// ...
}
22 methods 4 interface
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
953 extension code executed before each test is executed 5 annotation
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
954 user code executed before each test is executed 6 interface
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
955 extension code for handling exceptions thrown from
@Fast
@Test
void myFastTest() {
// ...
}
10 methods 7 interface
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
957 extension code executed immediately before a test is executed 8 annotation
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
554 user code of the actual test method 9 interface
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
959 extension code for handling exceptions thrown during a test 10 interface
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
960 extension code executed immediately after test execution and its corresponding exception handlers 11 annotation
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
961 user code executed after each test is executed 12 interface
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
962 extension code for handling exceptions thrown from
@Fast
@Test
void myFastTest() {
// ...
}
16 methods 13 interface
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
964 extension code executed after each test is executed 14 annotation
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
965 user code executed after all tests of the container are executed 15 interface
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
966 extension code for handling exceptions thrown from
@Fast
@Test
void myFastTest() {
// ...
}
29 methods 16 interface
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
968 extension code executed after all tests of the container are executed In the simplest case only the actual test method will be executed (step 8); all other steps are optional depending on the presence of user code or extension support for the corresponding lifecycle callback. For further details on the various lifecycle callbacks please consult the respective Javadoc for each annotation and extension. All invocations of user code methods in the above table can additionally be intercepted by implementing . 5.16.2. Wrapping Behavior of CallbacksJUnit Jupiter always guarantees wrapping behavior for multiple registered extensions that implement lifecycle callbacks such as
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
697,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
738,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
698,
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
21,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
884, and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
885. That means that, given two extensions
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
976 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
977 with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
976 registered before
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
977, any "before" callbacks implemented by
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
976 are guaranteed to execute before any "before" callbacks implemented by
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
977. Similarly, given the two same two extensions registered in the same order, any "after" callbacks implemented by
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
976 are guaranteed to execute after any "after" callbacks implemented by
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
977.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
976 is therefore said to wrap
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
977. JUnit Jupiter also guarantees wrapping behavior within class and interface hierarchies for user-supplied lifecycle methods (see ). @Fast
@Test
void myFastTest() { // ...
} 22 methods are inherited from superclasses as long as they are not hidden, overridden, or superseded (i.e., replaced based on signature only, irrespective of Java’s visibility rules). Furthermore, @Fast
@Test
void myFastTest() { // ...
} 22 methods from superclasses will be executed before @Fast
@Test
void myFastTest() { // ...
} 22 methods in subclasses. - Similarly,
@Fast
@Test
void myFastTest() { // ...
} 22 methods declared in an interface are inherited as long as they are not hidden or overridden, and @Fast
@Test
void myFastTest() { // ...
} 22 methods from an interface will be executed before @Fast
@Test
void myFastTest() { // ...
}
@Fast
@Test
void myFastTest() { // ...
} 29 methods are inherited from superclasses as long as they are not hidden, overridden, or superseded (i.e., replaced based on signature only, irrespective of Java’s visibility rules). Furthermore, @Fast
@Test
void myFastTest() { // ...
} 29 methods from superclasses will be executed after @Fast
@Test
void myFastTest() { // ...
} 29 methods in subclasses. - Similarly,
@Fast
@Test
void myFastTest() { // ...
} 29 methods declared in an interface are inherited as long as they are not hidden or overridden, and @Fast
@Test
void myFastTest() { // ...
} 29 methods from an interface will be executed after @Fast
@Test
void myFastTest() { // ...
}
@Fast
@Test
void myFastTest() { // ...
} 10 methods are inherited from superclasses as long as they are not overridden or superseded (i.e., replaced based on signature only, irrespective of Java’s visibility rules). Furthermore, @Fast
@Test
void myFastTest() { // ...
} 10 methods from superclasses will be executed before @Fast
@Test
void myFastTest() { // ...
} 10 methods in subclasses. - Similarly,
@Fast
@Test
void myFastTest() { // ...
} 10 methods declared as interface default methods are inherited as long as they are not overridden, and @Fast
@Test
void myFastTest() { // ...
} 10 default methods will be executed before @Fast
@Test
void myFastTest() { // ...
}
@Fast
@Test
void myFastTest() { // ...
} 16 methods are inherited from superclasses as long as they are not overridden or superseded (i.e., replaced based on signature only, irrespective of Java’s visibility rules). Furthermore, @Fast
@Test
void myFastTest() { // ...
} 16 methods from superclasses will be executed after @Fast
@Test
void myFastTest() { // ...
} 16 methods in subclasses. - Similarly,
@Fast
@Test
void myFastTest() { // ...
} 16 methods declared as interface default methods are inherited as long as they are not overridden, and @Fast
@Test
void myFastTest() { // ...
} 16 default methods will be executed after @Fast
@Test
void myFastTest() { // ...
}
The following examples demonstrate this behavior. Please note that the examples do not actually do anything realistic. Instead, they mimic common scenarios for testing interactions with the database. All methods imported statically from the
@Fast
@Test
void myFastTest() {
// ...
}
010 class log contextual information in order to help us better understand the execution order of user-supplied callback methods and callback methods in extensions. Extension1
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
57 Extension2
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
58 AbstractDatabaseTests
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
59 DatabaseTestsDemo
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
60 When the
@Fast
@Test
void myFastTest() {
// ...
}
011 test class is executed, the following is logged.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
61 The following sequence diagram helps to shed further light on what actually goes on within the
@Fast
@Test
void myFastTest() {
// ...
}
012 when the
@Fast
@Test
void myFastTest() {
// ...
}
011 test class is executed. DatabaseTestsDemo JUnit Jupiter does not guarantee the execution order of multiple lifecycle methods that are declared within a single test class or test interface. It may at times appear that JUnit Jupiter invokes such methods in alphabetical order. However, that is not precisely true. The ordering is analogous to the ordering for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 methods within a single test class. Lifecycle methods that are declared within a single test class or test interface will be ordered using an algorithm that is deterministic but intentionally non-obvious. This ensures that subsequent runs of a test suite execute lifecycle methods in the same order, thereby allowing for repeatable builds. In addition, JUnit Jupiter does not support wrapping behavior for multiple lifecycle methods declared within a single test class or test interface. The following example demonstrates this behavior. Specifically, the lifecycle method configuration is broken due to the order in which the locally declared lifecycle methods are executed. - Test data is inserted before the database connection has been opened, which results in a failure to connect to the database.
- The database connection is closed before deleting the test data, which results in a failure to connect to the database.
BrokenLifecycleMethodConfigDemo
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
62 When the
@Fast
@Test
void myFastTest() {
// ...
}
015 test class is executed, the following is logged.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
63 The following sequence diagram helps to shed further light on what actually goes on within the
@Fast
@Test
void myFastTest() {
// ...
}
012 when the
@Fast
@Test
void myFastTest() {
// ...
}
015 test class is executed. BrokenLifecycleMethodConfigDemo Due to the aforementioned behavior, the JUnit Team recommends that developers declare at most one of each type of lifecycle method (see ) per test class or test interface unless there are no dependencies between such lifecycle methods. 6. Advanced Topics
The module also contains other
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
639 implementations that can be used to build custom reporting. See for details. 6.1.1. Legacy XML formatimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
640 generates a separate XML report for each root in the
@Fast
@Test
void myFastTest() {
// ...
}
020. Note that the generated XML format is compatible with the de facto standard for JUnit 4 based test reports that was made popular by the Ant build system. The
@Fast
@Test
void myFastTest() {
// ...
}
021 is used by the as well. 6.1.2. Open Test Reporting XML format@Fast
@Test
void myFastTest() {
// ...
}
022 writes an XML report for the entire execution in the event-based format specified by Open Test Reporting which supports all features of the JUnit Platform such as hierarchical test structures, display names, tags, etc. The listener is auto-registered and can be configured via the following :
@Fast
@Test
void myFastTest() {
// ...
}
023 Enable/disable writing the report.
@Fast
@Test
void myFastTest() {
// ...
}
024 Configure the output directory for the reports. By default,
@Fast
@Test
void myFastTest() {
// ...
}
025 is used if a Gradle build script is found, and
@Fast
@Test
void myFastTest() {
// ...
}
026 if a Maven POM is found; otherwise, the current working directory is used. If enabled, the listener creates an XML report file named
@Fast
@Test
void myFastTest() {
// ...
}
027 per test run in the configured output directory. The can be used to convert from the event-based format to the hierarchical format which is more human-readable. GradleFor Gradle, writing Open Test Reporting compatible XML reports can be enabled and configured via system properties. The following samples configure its output directory to be the same directory Gradle uses for its own XML reports. A
@Fast
@Test
void myFastTest() {
// ...
}
028 is used to keep the tasks relocatable across different machines which is important when using Gradle’s Build Cache. Groovy DSL
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
64 Kotlin DSL
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
65 MavenFor Maven Surefire/Failsafe, you can enable Open Test Reporting output and configure the resulting XML files to be written to the same directory Surefire/Failsafe uses for its own XML reports as follows:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
66 Console LauncherWhen using the , you can enable Open Test Reporting output by setting the configuration parameters via
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
570:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
67 The JUnit Platform supports the declarative definition and execution of suites of tests from any test engine using the JUnit Platform. 6.2.1. SetupIn addition to the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
539 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
523 artifacts, you need at least one other test engine and its dependencies on the classpath. See for details regarding group IDs, artifact IDs, and versions. Required Dependencies
Both of the required dependencies are aggregated in the
@Fast
@Test
void myFastTest() {
// ...
}
035 artifact which can be declared in test scope instead of declaring explicit dependencies on
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
539 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
523. Transitive Dependencies
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
6.2.2. @Suite ExampleBy annotating a class with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
522 it is marked as a test suite on the JUnit Platform. As seen in the following example, selector and filter annotations can then be used to control the contents of the suite.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
68 Additional Configuration Options There are numerous configuration options for discovering and filtering tests in a test suite. Please consult the Javadoc of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
563 package for a full list of supported annotations and further details. The
@Fast
@Test
void myFastTest() {
// ...
}
045 artifact provides support for executing a test plan on the JUnit Platform and then verifying the expected results. As of JUnit Platform 1.4, this support is limited to the execution of a single
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 (see ). 6.3.1. Engine Test KitThe
@Fast
@Test
void myFastTest() {
// ...
}
047 package provides support for executing a
@Fast
@Test
void myFastTest() {
// ...
}
020 for a given
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
83 running on the JUnit Platform and then accessing the results via a fluent API to verify the expected results. The key entry point into this API is the
@Fast
@Test
void myFastTest() {
// ...
}
050 which provides static factory methods named
@Fast
@Test
void myFastTest() {
// ...
}
051 and
@Fast
@Test
void myFastTest() {
// ...
}
052. It is recommended that you select one of the
@Fast
@Test
void myFastTest() {
// ...
}
051 variants to benefit from the fluent API for building a
@FastTest
void myFastTest() {
// ...
}
59. If you prefer to use the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
568 from the
@FastTest
void myFastTest() {
// ...
}
60 API to build your
@FastTest
void myFastTest() {
// ...
}
59, you must use one of the
@Fast
@Test
void myFastTest() {
// ...
}
052 variants in
@Fast
@Test
void myFastTest() {
// ...
}
059. The following test class written using JUnit Jupiter will be used in subsequent examples.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
69 For the sake of brevity, the following sections demonstrate how to test JUnit’s own
@Fast
@Test
void myFastTest() {
// ...
}
012 whose unique engine ID is
@Fast
@Test
void myFastTest() {
// ...
}
061. If you want to test your own
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 implementation, you need to use its unique engine ID. Alternatively, you may test your own
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 by supplying an instance of it to the
@Fast
@Test
void myFastTest() {
// ...
}
064 static factory method. 6.3.2. Asserting StatisticsOne of the most common features of the Test Kit is the ability to assert statistics against events fired during the execution of a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
630. The following tests demonstrate how to assert statistics for containers and tests in the JUnit Jupiter
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84. For details on what statistics are available, consult the Javadoc for
@Fast
@Test
void myFastTest() {
// ...
}
067.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
70 1 Select the JUnit Jupiter
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84. 2 Select the test class. 3 Execute the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
630. 4 Filter by container events. 5 Assert statistics for container events. 6 Filter by test events. 7 Assert statistics for test events. In the
@Fast
@Test
void myFastTest() {
// ...
}
071 test method, the counts for the
@Fast
@Test
void myFastTest() {
// ...
}
072 and
@Fast
@Test
void myFastTest() {
// ...
}
073 statistics are
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo {
@Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
}
42 since the
@Fast
@Test
void myFastTest() {
// ...
}
012 and the class are both considered containers. 6.3.3. Asserting EventsIf you find that alone is insufficient for verifying the expected behavior of test execution, you can work directly with the recorded
@Fast
@Test
void myFastTest() {
// ...
}
077 elements and perform assertions against them. For example, if you want to verify the reason that the
@Fast
@Test
void myFastTest() {
// ...
}
078 method in was skipped, you can do that as follows. The
@Fast
@Test
void myFastTest() {
// ...
}
080 method in the following example is a shortcut for
@Fast
@Test
void myFastTest() {
// ...
}
081 from the AssertJ assertion library. For details on what conditions are available for use with AssertJ assertions against events, consult the Javadoc for
@Fast
@Test
void myFastTest() {
// ...
}
082.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
71 1 Select the JUnit Jupiter
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84. 2 Select the
@Fast
@Test
void myFastTest() {
// ...
}
078 method in the test class. 3 Execute the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
630. 4 Filter by test events. 5 Save the test
@Fast
@Test
void myFastTest() {
// ...
}
087 to a local variable. 6 Optionally assert the expected statistics. 7 Assert that the recorded test events contain exactly one skipped test named
@Fast
@Test
void myFastTest() {
// ...
}
088 with
@Fast
@Test
void myFastTest() {
// ...
}
089 as the reason. If you want to verify the type of exception thrown from the
@Fast
@Test
void myFastTest() {
// ...
}
090 method in , you can do that as follows.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
72 1 Select the JUnit Jupiter
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84. 2 Select the test class. 3 Execute the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
630. 4 Filter by test events. 5 Assert that the recorded test events contain exactly one failing test named
@Fast
@Test
void myFastTest() {
// ...
}
095 with an exception of type
@Fast
@Test
void myFastTest() {
// ...
}
096 and an error message equal to
@Fast
@Test
void myFastTest() {
// ...
}
097. Although typically unnecessary, there are times when you need to verify all of the events fired during the execution of a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
630. The following test demonstrates how to achieve this via the
@Fast
@Test
void myFastTest() {
// ...
}
099 method in the
@Fast
@Test
void myFastTest() {
// ...
}
059 API. Since
@Fast
@Test
void myFastTest() {
// ...
}
099 matches conditions exactly in the order in which the events were fired, has been annotated with
@Fast
@Test
void myFastTest() {
// ...
}
103 and each test method has been annotated with
@Fast
@Test
void myFastTest() {
// ...
}
104. This allows us to enforce the order in which the test methods are executed, which in turn allows our
@Fast
@Test
void myFastTest() {
// ...
}
105 test to be reliable. If you want to do a partial match with or without ordering requirements, you can use the methods
@Fast
@Test
void myFastTest() {
// ...
}
106 and
@Fast
@Test
void myFastTest() {
// ...
}
107, respectively.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
73 1 Select the JUnit Jupiter
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84. 2 Select the test class. 3 Execute the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
630. 4 Filter by all events. 5 Print all events to the supplied
@Fast
@Test
void myFastTest() {
// ...
}
111 for debugging purposes. Debug information can also be written to an
@Fast
@Test
void myFastTest() {
// ...
}
112 such as
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
621 or
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
622. 6 Assert all events in exactly the order in which they were fired by the test engine. The
@Fast
@Test
void myFastTest() {
// ...
}
115 invocation from the preceding example results in output similar to the following.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
74 One of the prominent goals of JUnit 5 is to make the interface between JUnit and its programmatic clients – build tools and IDEs – more powerful and stable. The purpose is to decouple the internals of discovering and executing tests from all the filtering and configuration that’s necessary from the outside. JUnit 5 introduces the concept of a
@FastTest
void myFastTest() {
// ...
}
60 that can be used to discover, filter, and execute tests. Moreover, third party test libraries – like Spock, Cucumber, and FitNesse – can plug into the JUnit Platform’s launching infrastructure by providing a custom . 6.4.1. Discovering TestsHaving test discovery as a dedicated feature of the platform itself frees IDEs and build tools from most of the difficulties they had to go through to identify test classes and test methods in previous versions of JUnit. Usage Example:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
75
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
76 You can select classes, methods, and all classes in a package or even search for all tests in the class-path or module-path. Discovery takes place across all participating test engines. The resulting
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
630 is a hierarchical (and read-only) description of all engines, classes, and test methods that fit the
@FastTest
void myFastTest() {
// ...
}
59. The client can traverse the tree, retrieve details about a node, and get a link to the original source (like class, method, or file position). Every node in the test plan has a unique ID that can be used to invoke a particular test or group of tests. Clients can register one or more
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
635 implementations via the
@Fast
@Test
void myFastTest() {
// ...
}
120 to gain insight into events that occur during test discovery. By default, the builder registers an "abort on failure" listener that aborts test discovery after the first discovery failure is encountered. The default
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
638 can be changed via the
@Fast
@Test
void myFastTest() {
// ...
}
122 . 6.4.2. Executing TestsTo execute tests, clients can use the same
@FastTest
void myFastTest() {
// ...
}
59 as in the discovery phase or create a new request. Test progress and reporting can be achieved by registering one or more
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
11 implementations with the
@FastTest
void myFastTest() {
// ...
}
60 as in the following example.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
77 All
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
639 methods are called sequentially. Methods for start events are called in registration order while methods for finish events are called in reverse order. Test case execution won’t start before all
@Fast
@Test
void myFastTest() {
// ...
}
127 calls have returned. 6.4.3. Registering a TestEngine
6.4.4. Registering a PostDiscoveryFilterIn addition to specifying post-discovery filters as part of a
@Fast
@Test
void myFastTest() {
// ...
}
128 passed to the
@Fast
@Test
void myFastTest() {
// ...
}
129 API,
@Fast
@Test
void myFastTest() {
// ...
}
130 implementations will be discovered at runtime via Java’s
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
774 mechanism and automatically applied by the
@FastTest
void myFastTest() {
// ...
}
60 in addition to those that are part of the request. For example, an
@Fast
@Test
void myFastTest() {
// ...
}
133 class implementing
@Fast
@Test
void myFastTest() {
// ...
}
134 and declared within the
@Fast
@Test
void myFastTest() {
// ...
}
135 file is loaded and applied automatically. 6.4.5. Registering a LauncherSessionListenerRegistered implementations of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
631 are notified when a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
632 is opened (before a
@Fast
@Test
void myFastTest() {
// ...
}
129 first discovers and executes tests) and closed (when no more tests will be discovered or executed). They can be registered programmatically via the
@Fast
@Test
void myFastTest() {
// ...
}
139 that is passed to the
@Fast
@Test
void myFastTest() {
// ...
}
140, or they can be discovered at runtime via Java’s
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
774 mechanism and automatically registered with
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
634 (unless automatic registration is disabled.) Tool SupportThe following build tools and IDEs are known to provide full support for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
634: - Gradle 4.6 and later
- Maven Surefire/Failsafe 3.0.0-M6 and later
- IntelliJ IDEA 2017.3 and later
Other tools might also work but have not been tested explicitly. Example UsageA
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
637 is well suited for implementing once-per-JVM setup/teardown behavior since it’s called before the first and after the last test in a launcher session, respectively. The scope of a launcher session depends on the used IDE or build tool but usually corresponds to the lifecycle of the test JVM. A custom listener that starts an HTTP server before executing the first test and stops it after the last test has been executed, could look like this: src/test/java/example/session/GlobalSetupTeardownListener.java
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
78 1 Start the HTTP server 2 Export its host address as a system property for consumption by tests 3 Export its port as a system property for consumption by tests 4 Stop the HTTP server This sample uses the HTTP server implementation from the jdk.httpserver module that comes with the JDK but would work similarly with any other server or resource. In order for the listener to be picked up by JUnit Platform, you need to register it as a service by adding a resource file with the following name and contents to your test runtime classpath (e.g. by adding the file to
@FastTest
void myFastTest() {
// ...
}
65): src/test/resources/META-INF/services/org.junit.platform.launcher.LauncherSessionListener
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
79 You can now use the resource from your test: src/test/java/example/session/HttpTests.java
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
80 1 Read the host address of the server from the system property set by the listener 2 Read the port of the server from the system property set by the listener 3 Send a request to the server 4 Check the status code of the response 6.4.6. Registering a LauncherInterceptorIn order to intercept the creation of instances of
@Fast
@Test
void myFastTest() {
// ...
}
129 and
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
631 and calls to the
@Fast
@Test
void myFastTest() {
// ...
}
148 and
@Fast
@Test
void myFastTest() {
// ...
}
149 methods of the former, clients can register custom implementations of
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
633 via Java’s
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
774 mechanism by additionally setting the
@Fast
@Test
void myFastTest() {
// ...
}
152 to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49. A typical use case is to create a custom replace the
@Fast
@Test
void myFastTest() {
// ...
}
154 used by the JUnit Platform to load test classes and engine implementations.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
81 6.4.7. Registering a LauncherDiscoveryListenerIn addition to specifying discovery listeners as part of a
@Fast
@Test
void myFastTest() {
// ...
}
128 or registering them programmatically via the
@Fast
@Test
void myFastTest() {
// ...
}
129 API, custom
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
638 implementations can be discovered at runtime via Java’s
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
774 mechanism and automatically registered with the
@FastTest
void myFastTest() {
// ...
}
60 created via the
@Fast
@Test
void myFastTest() {
// ...
}
140. For example, an
@Fast
@Test
void myFastTest() {
// ...
}
161 class implementing
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
638 and declared within the
@Fast
@Test
void myFastTest() {
// ...
}
163 file is loaded and registered automatically. 6.4.8. Registering a TestExecutionListenerIn addition to the public
@Fast
@Test
void myFastTest() {
// ...
}
129 API method for registering test execution listeners programmatically, custom
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
11 implementations will be discovered at runtime via Java’s
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
774 mechanism and automatically registered with the
@FastTest
void myFastTest() {
// ...
}
60 created via the
@Fast
@Test
void myFastTest() {
// ...
}
140. For example, an
@Fast
@Test
void myFastTest() {
// ...
}
169 class implementing
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
639 and declared within the
@Fast
@Test
void myFastTest() {
// ...
}
171 file is loaded and registered automatically. 6.4.9. Configuring a TestExecutionListenerWhen a
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
11 is registered programmatically via the
@Fast
@Test
void myFastTest() {
// ...
}
129 API, the listener may provide programmatic ways for it to be configured — for example, via its constructor, setter methods, etc. However, when a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
639 is registered automatically via Java’s
@Fast
@Test
void myFastTest() {
// ...
}
175 mechanism (see ), there is no way for the user to directly configure the listener. In such cases, the author of a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
639 may choose to make the listener configurable via . The listener can then access the configuration parameters via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
630 supplied to the
@Fast
@Test
void myFastTest() {
// ...
}
178 and
@Fast
@Test
void myFastTest() {
// ...
}
179 callback methods. See the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
651 for an example. 6.4.10. Deactivating a TestExecutionListenerSometimes it can be useful to run a test suite without certain execution listeners being active. For example, you might have custom a
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
11 that sends the test results to an external system for reporting purposes, and while debugging you might not want these debug results to be reported. To do this, provide a pattern for the
@Fast
@Test
void myFastTest() {
// ...
}
182 configuration parameter to specify which execution listeners should be deactivated (i.e. not registered) for the current test run. Only listeners registered via the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
774 mechanism within the
@Fast
@Test
void myFastTest() {
// ...
}
171 file can be deactivated. In other words, any
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
639 registered explicitly via the
@Fast
@Test
void myFastTest() {
// ...
}
128 cannot be deactivated via the
@Fast
@Test
void myFastTest() {
// ...
}
182 configuration parameter. In addition, since execution listeners are registered before the test run starts, the
@Fast
@Test
void myFastTest() {
// ...
}
182 configuration parameter can only be supplied as a JVM system property or via the JUnit Platform configuration file (see for details). This configuration parameter cannot be supplied in the
@FastTest
void myFastTest() {
// ...
}
59 that is passed to the
@Fast
@Test
void myFastTest() {
// ...
}
129. Pattern Matching Syntax
6.4.11. Configuring the LauncherIf you require fine-grained control over automatic detection and registration of test engines and listeners, you may create an instance of
@Fast
@Test
void myFastTest() {
// ...
}
139 and supply that to the
@Fast
@Test
void myFastTest() {
// ...
}
140. Typically, an instance of
@Fast
@Test
void myFastTest() {
// ...
}
193 is created via the built-in fluent builder API, as demonstrated in the following example.
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
82 6.4.12. Dry-Run ModeWhen running tests via the
@Fast
@Test
void myFastTest() {
// ...
}
129 API, you can enable dry-run mode by setting the
@Fast
@Test
void myFastTest() {
// ...
}
195 to
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.DisplayNameGeneration;
import org.junit.jupiter.api.DisplayNameGenerator;
import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
import org.junit.jupiter.api.IndicativeSentencesGeneration;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
class DisplayNameGeneratorDemo {
@Nested
@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
class A_year_is_not_supported {
@Test
void if_it_is_zero() {
}
@DisplayName("A negative value for year is not supported by the leap year computation.")
@ParameterizedTest(name = "For example, year {0} is not supported.")
@ValueSource(ints = { -1, -4 })
void if_it_is_negative(int year) {
}
}
@Nested
@IndicativeSentencesGeneration(separator = " -> ", generator = ReplaceUnderscores.class)
class A_year_is_a_leap_year {
@Test
void if_it_is_divisible_by_4_but_not_by_100() {
}
@ParameterizedTest(name = "Year {0} is a leap year.")
@ValueSource(ints = { 2016, 2020, 2048 })
void if_it_is_one_of_the_following_years(int year) {
}
}
}
49. In this mode, the
@Fast
@Test
void myFastTest() {
// ...
}
129 will not actually execute any tests but will notify registered
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class StandardTests {
@BeforeAll
static void initAll() {
}
@BeforeEach
void init() {
}
@Test
void succeedingTest() {
}
@Test
void failingTest() {
fail("a failing test");
}
@Test
@Disabled("for demonstration purposes")
void skippedTest() {
// not executed
}
@Test
void abortedTest() {
assumeTrue("abc".contains("Z"));
fail("test should have been aborted");
}
@AfterEach
void tearDown() {
}
@AfterAll
static void tearDownAll() {
}
}
11 instances as if all tests had been skipped and their containers had been successful. This can be useful to test changes in the configuration of a build or to verify a listener is called as expected without having to wait for all tests to be executed. 6.5. Test EnginesA
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 facilitates discovery and execution of tests for a particular programming model. For example, JUnit provides a
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 that discovers and executes tests written using the JUnit Jupiter programming model (see and ). 6.5.1. JUnit Test EnginesJUnit provides three
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 implementations. @Fast
@Test
void myFastTest() { // ...
} @Fast
@Test
void myFastTest() { // ...
} @Fast
@Test
void myFastTest() { // ...
}
6.5.2. Custom Test EnginesYou can contribute your own custom
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
83 by implementing the interfaces in the junit-platform-engine module and registering your engine. Every
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 must provide its own unique ID, discover tests from an
@Fast
@Test
void myFastTest() {
// ...
}
207, and execute those tests according to an
@Fast
@Test
void myFastTest() {
// ...
}
208. The
@Fast
@Test
void myFastTest() {
// ...
}
209 unique ID prefix is reserved for TestEngines from the JUnit Team The JUnit Platform
@FastTest
void myFastTest() {
// ...
}
60 enforces that only
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 implementations published by the JUnit Team may use the
@Fast
@Test
void myFastTest() {
// ...
}
209 prefix for their
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 IDs. - If any third-party
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 84 claims to be @Fast
@Test
void myFastTest() { // ...
} 215 or @Fast
@Test
void myFastTest() { // ...
} - If any third-party
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 84 uses the @Fast
@Test
void myFastTest() { // ...
}
In order to facilitate test discovery within IDEs and tools prior to launching the JUnit Platform,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 implementations are encouraged to make use of the
@Fast
@Test
void myFastTest() {
// ...
}
220 annotation. For example, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
97 and
@Fast
@Test
void myFastTest() {
// ...
}
01 annotations in JUnit Jupiter are meta-annotated with
@Fast
@Test
void myFastTest() {
// ...
}
220. Consult the Javadoc for
@Fast
@Test
void myFastTest() {
// ...
}
224 for further details. If your custom
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 needs to be configured, consider allowing users to supply configuration via . Please note, however, that you are strongly encouraged to use a unique prefix for all configuration parameters supported by your test engine. Doing so will ensure that there are no conflicts between the names of your configuration parameters and those from other test engines. In addition, since configuration parameters may be supplied as JVM system properties, it is wise to avoid conflicts with the names of other system properties. For example, JUnit Jupiter uses
@Fast
@Test
void myFastTest() {
// ...
}
226 as a prefix of all of its supported configuration parameters. Furthermore, as with the warning above regarding the
@Fast
@Test
void myFastTest() {
// ...
}
209 prefix for
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 IDs, you should not use
@Fast
@Test
void myFastTest() {
// ...
}
229 as a prefix for the names of your own configuration parameters. Although there is currently no official guide on how to implement a custom
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84, you can consult the implementation of or the implementation of third-party test engines listed in the . You will also find various tutorials and blogs on the Internet that demonstrate how to write a custom
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84.
@Fast
@Test
void myFastTest() {
// ...
}
232 is a convenient abstract base implementation of the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 SPI (used by the
@Fast
@Test
void myFastTest() {
// ...
}
- that only requires implementors to provide the logic for test discovery. It implements execution of
@Fast
@Test
void myFastTest() {
// ...
}
235 that implement the
@Fast
@Test
void myFastTest() {
// ...
}
236 interface, including support for parallel execution. 6.5.3. Registering a TestEngineimport java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 registration is supported via Java’s
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
774 mechanism. For example, the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
417 module registers its
@Fast
@Test
void myFastTest() {
// ...
}
240 in a file named
@Fast
@Test
void myFastTest() {
// ...
}
241 within the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
776 folder in the
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
417 JAR. 6.5.4. RequirementsThe words "must", "must not", "required", "shall", "shall not", "should", "should not", "recommended", "may", and "optional" in this section are to be interpreted as described in RFC 2119. Mandatory requirementsFor interoperability with build tools and IDEs,
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
84 implementations must adhere to the following requirements: - The
@Fast
@Test
void myFastTest() { // ...
} 245 returned from @Fast
@Test
void myFastTest() { // ...
} 246 must be the root of a tree of @Fast
@Test
void myFastTest() { // ...
} - A
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 84 must be able to discover @Fast
@Test
void myFastTest() { // ...
} 249 for any unique ID that it previously generated and returned from @Fast
@Test
void myFastTest() { // ...
} - The
@Fast
@Test
void myFastTest() { // ...
} 251, @Fast
@Test
void myFastTest() { // ...
} 127, and @Fast
@Test
void myFastTest() { // ...
} 253 methods of the @Fast
@Test
void myFastTest() { // ...
} 254 passed to @Fast
@Test
void myFastTest() { // ...
} 255 must be called for every @Fast
@Test
void myFastTest() { // ...
} 245 node in the tree returned from @Fast
@Test
void myFastTest() { // ...
}
Enhanced compatibilityAdhering to the following requirements is optional but recommended for enhanced compatibility with build tools and IDEs: - Unless to indicate an empty discovery result, the
@Fast
@Test
void myFastTest() { // ...
} 245 returned from @Fast
@Test
void myFastTest() { // ...
} - When resolving
@Fast
@Test
void myFastTest() { // ...
} 249, a import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 84 should only return @Fast
@Test
void myFastTest() { // ...
} @Fast
@Test
void myFastTest() { // ...
}
7. API EvolutionOne of the major goals of JUnit 5 is to improve maintainers' capabilities to evolve JUnit despite its being used in many projects. With JUnit 4 a lot of stuff that was originally added as an internal construct only got used by external extension writers and tool builders. That made changing JUnit 4 especially difficult and sometimes impossible. That’s why JUnit 5 introduces a defined lifecycle for all publicly available interfaces, classes, and methods. 7.1. API Version and StatusEvery published artifact has a version number
@Fast
@Test
void myFastTest() {
// ...
}
264, and all publicly available interfaces, classes, and methods are annotated with @API from the @API Guardian project. The annotation’s
@Fast
@Test
void myFastTest() {
// ...
}
265 attribute can be assigned one of the following values. Status Description
@Fast
@Test
void myFastTest() {
// ...
}
266 Must not be used by any code other than JUnit itself. Might be removed without prior notice.
@Fast
@Test
void myFastTest() {
// ...
}
267 Should no longer be used; might disappear in the next minor release.
@Fast
@Test
void myFastTest() {
// ...
}
268 Intended for new, experimental features where we are looking for feedback.
Use this element with caution; it might be promoted to
@Fast
@Test
void myFastTest() {
// ...
}
269 or
@Fast
@Test
void myFastTest() {
// ...
}
270 in the future, but might also be removed without prior notice, even in a patch.
@Fast
@Test
void myFastTest() {
// ...
}
269 Intended for features that will not be changed in a backwards- incompatible way for at least the next minor release of the current major version. If scheduled for removal, it will be demoted to
@Fast
@Test
void myFastTest() {
// ...
}
267 first.
@Fast
@Test
void myFastTest() {
// ...
}
270 Intended for features that will not be changed in a backwards- incompatible way in the current major version (
@Fast
@Test
void myFastTest() {
// ...
}
274). If the
@Fast
@Test
void myFastTest() {
// ...
}
275 annotation is present on a type, it is considered to be applicable for all public members of that type as well. A member is allowed to declare a different
@Fast
@Test
void myFastTest() {
// ...
}
265 value of lower stability. 7.2. Experimental APIsThe following table lists which APIs are currently designated as experimental via
@Fast
@Test
void myFastTest() {
// ...
}
277. Caution should be taken when relying on such APIs. Package Name Type Name Since
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
10
@Fast
@Test
void myFastTest() {
// ...
}
279 (enum)
@Fast
@Test
void myFastTest() {
// ...
}
280
@Fast
@Test
void myFastTest() {
// ...
}
281
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
323 (interface)
@Fast
@Test
void myFastTest() {
// ...
}
283
@Fast
@Test
void myFastTest() {
// ...
}
281
@Fast
@Test
void myFastTest() {
// ...
}
285 (interface)
@Fast
@Test
void myFastTest() {
// ...
}
286
@Fast
@Test
void myFastTest() {
// ...
}
281
@Fast
@Test
void myFastTest() {
// ...
}
288 (interface)
@Fast
@Test
void myFastTest() {
// ...
}
280
@Fast
@Test
void myFastTest() {
// ...
}
281
@Fast
@Test
void myFastTest() {
// ...
}
291 (interface)
@Fast
@Test
void myFastTest() {
// ...
}
280
@Fast
@Test
void myFastTest() {
// ...
}
51
@Fast
@Test
void myFastTest() {
// ...
}
294 (enum)
@Fast
@Test
void myFastTest() {
// ...
}
280
@Fast
@Test
void myFastTest() {
// ...
}
51
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
310 (interface)
@Fast
@Test
void myFastTest() {
// ...
}
283
@Fast
@Test
void myFastTest() {
// ...
}
299
@Fast
@Test
void myFastTest() {
// ...
}
300 (class)
@Fast
@Test
void myFastTest() {
// ...
}
283
@Fast
@Test
void myFastTest() {
// ...
}
302
@Fast
@Test
void myFastTest() {
// ...
}
303 (class)
@Fast
@Test
void myFastTest() {
// ...
}
283
@Fast
@Test
void myFastTest() {
// ...
}
305
@Fast
@Test
void myFastTest() {
// ...
}
306 (class)
@Fast
@Test
void myFastTest() {
// ...
}
307
@Fast
@Test
void myFastTest() {
// ...
}
308
@Fast
@Test
void myFastTest() {
// ...
}
309 (class)
@Fast
@Test
void myFastTest() {
// ...
}
283
@Fast
@Test
void myFastTest() {
// ...
}
308
@Fast
@Test
void myFastTest() {
// ...
}
312 (class)
@Fast
@Test
void myFastTest() {
// ...
}
283
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
655
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
642 (class)
@Fast
@Test
void myFastTest() {
// ...
}
316
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
655
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
641 (class)
@Fast
@Test
void myFastTest() {
// ...
}
316
@Fast
@Test
void myFastTest() {
// ...
}
320
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
638 (interface)
@Fast
@Test
void myFastTest() {
// ...
}
322
@Fast
@Test
void myFastTest() {
// ...
}
320
@Fast
@Test
void myFastTest() {
// ...
}
324 (interface)
@Fast
@Test
void myFastTest() {
// ...
}
325
@Fast
@Test
void myFastTest() {
// ...
}
320
@Fast
@Test
void myFastTest() {
// ...
}
327 (interface)
@Fast
@Test
void myFastTest() {
// ...
}
325
@Fast
@Test
void myFastTest() {
// ...
}
329
@Fast
@Test
void myFastTest() {
// ...
}
330 (class)
@Fast
@Test
void myFastTest() {
// ...
}
316
@Fast
@Test
void myFastTest() {
// ...
}
332
@Fast
@Test
void myFastTest() {
// ...
}
333 (class)
@Fast
@Test
void myFastTest() {
// ...
}
307
@Fast
@Test
void myFastTest() {
// ...
}
335
@Fast
@Test
void myFastTest() {
// ...
}
336 (annotation)
@Fast
@Test
void myFastTest() {
// ...
}
325
@Fast
@Test
void myFastTest() {
// ...
}
335
@Fast
@Test
void myFastTest() {
// ...
}
339 (annotation)
@Fast
@Test
void myFastTest() {
// ...
}
325 7.3. Deprecated APIsThe following table lists which APIs are currently designated as deprecated via
@Fast
@Test
void myFastTest() {
// ...
}
341. You should avoid using deprecated APIs whenever possible, since such APIs will likely be removed in an upcoming release. Package Name Type Name Since
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
@Test
public @interface FastTest {
}
10
@Fast
@Test
void myFastTest() {
// ...
}
343 (class)
@Fast
@Test
void myFastTest() {
// ...
}
344
@Fast
@Test
void myFastTest() {
// ...
}
345
@Fast
@Test
void myFastTest() {
// ...
}
346 (class)
@Fast
@Test
void myFastTest() {
// ...
}
347
@Fast
@Test
void myFastTest() {
// ...
}
345
@Fast
@Test
void myFastTest() {
// ...
}
349 (class)
@Fast
@Test
void myFastTest() {
// ...
}
350
@Fast
@Test
void myFastTest() {
// ...
}
351
@Fast
@Test
void myFastTest() {
// ...
}
352 (class)
@Fast
@Test
void myFastTest() {
// ...
}
350
@Fast
@Test
void myFastTest() {
// ...
}
354
@Fast
@Test
void myFastTest() {
// ...
}
355 (class)
@Fast
@Test
void myFastTest() {
// ...
}
356
@Fast
@Test
void myFastTest() {
// ...
}
329
@Fast
@Test
void myFastTest() {
// ...
}
358 (class)
@Fast
@Test
void myFastTest() {
// ...
}
322
@Fast
@Test
void myFastTest() {
// ...
}
360
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
520 (class)
@Fast
@Test
void myFastTest() {
// ...
}
316
@Fast
@Test
void myFastTest() {
// ...
}
335
@Fast
@Test
void myFastTest() {
// ...
}
364 (annotation)
@Fast
@Test
void myFastTest() {
// ...
}
316 The @API Guardian project plans to provide tooling support for publishers and consumers of APIs annotated with @API. For example, the tooling support will likely provide a means to check if JUnit APIs are being used in accordance with
@Fast
@Test
void myFastTest() {
// ...
}
275 annotation declarations. 8. Contributors
9. Release NotesThe release notes are available . 10. Appendix
10.1. Reproducible BuildsStarting with version 5.7, JUnit 5 aims for its non-javadoc JARs to be reproducible. Under identical build conditions, such as Java version, repeated builds should provide the same output byte-for-byte. This means that anyone can reproduce the build conditions of the artifacts on Maven Central/Sonatype and produce the same output artifact locally, confirming that the artifacts in the repositories were actually generated from this source code.
10.2.1. JUnit Platform
- Group ID:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - Version:
@Fast
@Test
void myFastTest() { // ...
} - Artifact IDs:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 543
Common APIs and support utilities for the JUnit Platform. Any API annotated with @Fast
@Test
void myFastTest() { // ...
} 370 is intended solely for usage within the JUnit framework itself. Any usage of internal APIs by external parties is not supported! @Fast
@Test
void myFastTest() { // ...
} 371
Support for discovering and executing tests on the JUnit Platform from the console. See for details. @Fast
@Test
void myFastTest() { // ...
} 372
An executable JAR with all dependencies included is provided in Maven Central under the junit-platform-console-standalone directory. See for details. import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 542
Public API for test engines. See for details. @Fast
@Test
void myFastTest() { // ...
} 374
Provides a import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 638 and import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 639 for Java Flight Recorder events on the JUnit Platform. See for details. import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 416
Public API for configuring and launching test plans — typically used by IDEs and build tools. See for details. @Fast
@Test
void myFastTest() { // ...
} 378 import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 639 implementations that generate test reports — typically used by IDEs and build tools. See for details. import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 532
Runner for executing tests and test suites on the JUnit Platform in a JUnit 4 environment. See for details. @Fast
@Test
void myFastTest() { // ...
} 035
JUnit Platform Suite artifact that transitively pulls in dependencies on import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 539 and import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 523 for simplified dependency management in build tools such as Gradle and Maven. import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 539
Annotations for configuring test suites on the JUnit Platform. Supported by the and the . import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 540
Common support utilities for executing test suites on the JUnit Platform. import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 523
Engine that executes test suites on the JUnit Platform; only required at runtime. See for details. @Fast
@Test
void myFastTest() { // ...
} 045
Provides support for executing a test plan for a given import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
10.2.2. JUnit Jupiter
- Group ID:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - Version:
@Fast
@Test
void myFastTest() { // ...
} - Artifact IDs:
@Fast
@Test
void myFastTest() { // ...
} 215
JUnit Jupiter aggregator artifact that transitively pulls in dependencies on import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 96, import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 08, and import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 417 for simplified dependency management in build tools such as Gradle and Maven. import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 96
JUnit Jupiter API for and . import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 417
JUnit Jupiter test engine implementation; only required at runtime. import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("A special test case")
class DisplayNameDemo { @Test
@DisplayName("Custom test name containing spaces")
void testWithDisplayNameContainingSpaces() {
}
@Test
@DisplayName("╯°□°）╯")
void testWithDisplayNameContainingSpecialCharacters() {
}
@Test
@DisplayName("😱")
void testWithDisplayNameContainingEmoji() {
}
} 08
Support for in JUnit Jupiter. import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} 373
Support for migrating from JUnit 4 to JUnit Jupiter; only required for support for JUnit 4’s @Fast
@Test
void myFastTest() { // ...
}
10.2.3. JUnit Vintage
- Group ID:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - Version:
@Fast
@Test
void myFastTest() { // ...
} - Artifact ID:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
}
10.2.4. Bill of Materials (BOM)The Bill of Materials POM provided under the following Maven coordinates can be used to ease dependency management when referencing multiple of the above artifacts using or . - Group ID:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - Artifact ID:
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Tag("fast")
public @interface Fast {
} - Version:
@Fast
@Test
void myFastTest() { // ...
}
10.2.5. DependenciesMost of the above artifacts have a dependency in their published Maven POMs on the following @API Guardian JAR. - Group ID:
@Fast
@Test
void myFastTest() { // ...
} - Artifact ID:
@Fast
@Test
void myFastTest() { // ...
} - Version:
@Fast
@Test
void myFastTest() { // ...
}
In addition, most of the above artifacts have a direct or transitive dependency on the following OpenTest4J JAR. | 
