springboot-tdd

This skill provides a comprehensive TDD workflow tailored for Spring Boot services, focusing on maintaining 80%+ code coverage through robust unit, integration, and persistence testing strategies. It is designed for software engineers and backend developers who need to implement new features, resolve bugs, or perform refactoring while ensuring system reliability. By integrating standard tools such as JUnit 5, Mockito, MockMvc, and Testcontainers, the skill guides the AI to follow the Arrange-Act-Assert pattern, enforce JaCoCo coverage metrics, and maintain deterministic test environments using real database containers.

• Streamlines the TDD lifecycle: write failing tests, implement minimal code, refactor, and verify coverage.

• Configures web-layer testing with MockMvc for RESTful API endpoint validation.

• Facilitates persistence layer verification using @DataJpaTest and Testcontainers for Postgres/Redis isolation.

• Promotes best practices including AssertJ for fluent assertions, parameterized testing for edge cases, and test data builders for clean setup.

• Includes CI/CD automation snippets for Maven and Gradle to ensure continuous integration readiness.

• Supports integration testing with @SpringBootTest to mimic production configuration profiles.

• Provides clear, copy-pasteable templates for common Spring Boot testing scenarios.

• The skill assumes a Java/Maven or Gradle ecosystem and expects standard Spring Boot project structures.

• Recommended for developers prioritizing maintainability and test coverage who want to reduce the risk of regressions during complex refactors.

• Users should ensure their environment supports Docker for Testcontainers integration.

• Inputs involve existing service logic or new requirement specifications; outputs are structured test classes and coverage reports.

• Prioritizes behavior-driven testing over implementation-specific details to keep test suites decoupled from structural changes.