springboot-tdd

Test-driven development framework for Spring Boot with JUnit 5, Mockito, MockMvc, Testcontainers, and JaCoCo enforcement. TDD guidance for Spring Boot services with 80%+ coverage (unit + integration). Patterns: Maven snippet: Remember : Keep tests fast, isolated, and deterministic. Test behavior, not implementation details. - Covers unit tests (Mockito), web layer tests (MockMvc), integration tests (SpringBootTest), and persistence tests (DataJpaTest) with concrete examples - Integrates Testcontainers for production-mirroring Postgres/Redis databases and JaCoCo for enforcing 80%+ code coverage - Emphasizes Arrange-Act-Assert patterns, AssertJ assertions, and test data builders for maintainability - Targets feature additions, bug fixes, and refactoring workflows with CI commands for Maven and Gradle - New features or endpoints - Bug fixes or refactors - Adding data access logic or security rules - Write tests first (they should fail) - Implement minimal code to pass - Refactor with tests green - Enforce coverage (JaCoCo) - Arrange-Act-Assert - Avoid partial mocks; prefer explicit stubbing - Use @ParameterizedTest for variants - Use reusable containers for Postgres/Redis to mirror production - Wire via @DynamicPropertySource to inject JDBC URLs into Spring context - Prefer AssertJ ( assertThat ) for readability - For JSON responses, use jsonPath - For exceptions:...