Junit 5 @DisplayName : In Junit 5 test classes and test methods can declare custom display names via Junit 5 @DisplayName annotation.

We can display names with spaces, special characters, and even emojis. That names will be displayed in test reports and by test runners and IDEs. Let’s go through an example to see how the Junit 5 @DispalyName works.

Technologies used :

1. Junit 5.5.2
2. Maven 3
3. Java 8
4. Spring Tool Suite 3.9.8

Junit 5 Dispaly Names example maven project :

2.1. JUnit Jupiter supports custom display name generators that can be configured via the @DisplayNameGeneration annotation.

2.2. Values provided via @DisplayName annotations always take precedence over display names generated by a DisplayNameGenerator.

2.3. This example uses the JUnit ReplaceUnderscores generator to replace the underscores with spaces.

3.1. We can extend the JUnit DisplayNameGenerator to create our custom display name generator.

4.1. We can also set default DisplayNameGenerator that can be used by default if we do not use @DisplayName annotation explicitly to the each Junit 5 test case.

4.2. We need to set junit.jupiter.displayname.generator.default configuration parameter to specify the fully qualified class name of the DisplayNameGenerator you would like to use by default.you can specify the fully qualified name of any custom class that implements DisplayNameGenerator.

junit-platform.properties in src/test/resources :