Learn how to tag and filter JUnit 5 tests in this tutorial. Part VII of our JUnit 5 series will walk you through the process.

Tagging and filtering JUnit 5 tests is like creating a playlist for your favorite tunes. You can tag tests with different categories, like "integration" or "performance", and then include or exclude them to run only the ones you want. It’s like being the DJ of your test suite! ๐ŸŽต #TagItLikeAJUnitPro

Overview ๐Ÿ“

In this JUnit 5 tutorial, we will cover the benefit of tagging tests and how to filter them. We will learn how to tag test methods and classes, as well as include and exclude specific tests. Additionally, we will explore how to execute tests using Maven’s Surefire plugin and in an IDE.

Syntax Rules for Tagging

Rules for Tagging a Class

RuleDescription
1Tag must not be null or blank
2Trimmed tag must not contain white space
3Trim tag must not contain ISO control characters
4Trim tag must not contain reserved characters (e.g., comma, parenthesis, ampersand, bar, and pipe)

Now, let’s take a look at the syntax rules for tagging a class and how to implement tagging a method.

Implementing Tagging a Method

StepDescription
1. Create ClassesCreate new classes in the IDE
2. Tag Test MethodsUse annotations to tag test methods
3. Run TestsExecute tests and verify the tagged results

Let’s transition to tagging a class and understand how to tag a class and execute tests using Maven’s Surefire plugin and in an IDE.

Executing Tests with Maven’s Surefire Plugin and in an IDE

Executing Tests with Maven’s Surefire Plugin

CommandDescription
mvn test -Dgroups=<group name>Execute tests by specifying a group

When using Maven’s Surefire plugin, we can include and exclude specific tests by using tag expressions. Additionally, we can run tests with specific tags directly from the Integrated Development Environment (IDE). Let’s explore how to execute tests using Maven’s Surefire plugin and in an IDE.

Tag Expressions

OperationDescription
<Include both tags
!Exclude the tag
|Include either tag

Example of Tag Expressions

When executing tests with tag expressions, we can include and exclude specific tags to filter our test results. The tag expressions provide a flexible way to execute tests based on specific criteria.

Conclusion

In conclusion, tagging and filtering tests in JUnit 5 allows us to organize and manage test suites effectively. By understanding the syntax rules for tagging classes and methods, utilizing tag expressions, and leveraging Maven’s Surefire plugin and IDE execution options, we can efficiently execute and manage our test suites.

Key Takeaways ๐Ÿš€

  • Tagging tests helps in organizing and managing test suites.
  • Syntax rules for tagging classes and methods are essential for proper implementation.
  • Tag expressions provide a flexible way to execute tests based on specific criteria.
  • Maven’s Surefire plugin and IDE options offer convenient ways to execute and manage tests.

FAQ

  1. How can I include and exclude specific tests using Maven’s Surefire plugin?

    • You can include and exclude specific tests by using the -Dgroups command with the desired group names.
  2. What are tag expressions, and how can they be used to filter test results?

    • Tag expressions are Boolean operators that allow you to include or exclude specific tags when executing tests. They provide a flexible way to filter test results based on specific criteria.
  3. Can tag expressions be used in IDE execution options?

    • Yes, tag expressions can be used in IDE execution options to run tests with specific tags directly from the IDE.

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