java-test-engineer

To write unit tests for a Spring Boot service layer, use JUnit 5 with MockitoExtension to create mock objects for dependencies. AssertJ provides fluent assertions to verify behaviors and maintain test structure.

Integration tests in a Java Spring Boot project should span service, repository, and controller layers. Using JUnit 5 and AssertJ ensures high coverage and stable validation across architectural boundaries.

TDD workflow in Java testing involves a strict test-first cycle using AssertJ for assertions and Mockito for mocking. This approach ensures reliable test creation and conventional naming patterns for maintainability.

Yes, you can apply this JUnit 5, Mockito, and AssertJ testing approach to existing Java and Spring Boot projects. It provides systematic examples to build your first unit test without altering core logic.

High regression costs and inconsistency in Java tests often stem from a lack of systematic unit and integration testing. Implementing strict TDD with Mockito and AssertJ structural patterns resolves these maintenance challenges.