JUnit 5 Exception Handling and Test Execution Extensions

Writing reliable unit tests requires more than just simple assertions; you must also manage unexpected runtime behavior and customize the test execution flow. This course teaches you how to leverage the powerful JUnit 5 extension model to intercept exceptions, customize test failure behavior, and ensure your test suite remains stable and maintainable. This is what you will learn: * Understand the fundamental architecture and lifecycle of JUnit 5 tests, including setup and teardown methods. * Apply the TestExecutionExceptionHandler extension to intercept and manage runtime exceptions that occur during test runs. * Practice implementing custom extensions for logging, reporting, and modifying test outcomes based on intercepted exceptions. * Master modern JUnit 5 assertion techniques, including using assertThrows for testing expected exception scenarios. * Configure conditional test execution and manage test instances using built-in JUnit 5 annotations. We start by defining the JUnit 5 architecture and progress through implementing lifecycle callbacks before focusing on advanced exception handling patterns and creating custom extensions. This course is designed for beginner Java developers who want to improve the robustness and reliability of their unit tests in new or existing projects. No prior experience with JUnit extensions is required. Start building more resilient test suites today.