What problem does it solve?
Spring Boot teams often ship changes that break existing behavior, and regression bugs slip in when tests are added late or written inconsistently. This Skill helps you implement test-driven development (TDD) with clear structure across unit, web, and integration layers so you can refactor safely and keep coverage high.
Core Features & Use Cases
- Unit testing with JUnit 5 + Mockito: Validate service logic with Arrange-Act-Assert and deterministic stubbing, including edge cases via parameterized tests.
- Web layer testing with MockMvc: Verify controller behavior and JSON responses without running the full application.
- Integration testing with SpringBootTest + Testcontainers: Confirm persistence and wiring against realistic infrastructure while keeping tests isolated and reproducible.
- Coverage enforcement with JaCoCo: Encourage 80%+ unit and integration coverage as part of the workflow.
Use case: When adding a new endpoint to a Spring Boot REST API, first write a failing controller/service/repository test that captures the expected behavior, then implement the minimal code to make it pass, and finally refactor while maintaining green tests and coverage.
Quick Start
Use springboot-tdd to plan and implement a failing test first for your new Spring Boot endpoint, then iterate until the unit, web, and integration tests pass with JaCoCo coverage checks.
