springboot-tdd

Spring Boot TDD patterns structure tests across unit, slice, and integration layers using JUnit 5, Mockito, MockMvc, and Testcontainers to ensure reliable and deterministic test execution in your application.

Testing Spring Boot controllers with MockMvc uses focused web-layer slice tests to verify HTTP request and response behavior in isolation, ensuring your controller endpoints function correctly without loading the full application context.

Setting up Testcontainers for Spring Boot integration tests verifies application behavior against real services by spinning up disposable Docker containers, providing deterministic and reproducible test execution environments for your CI pipelines.

Yes, this TDD approach works with standard Java tooling like Gradle or Maven in Spring Boot 3.x projects, assuming you have the widely used Spring testing libraries and JUnit 5 dependencies available in your build configuration.

Use Mockito mocks for isolated service-layer unit testing with clear expectations, and switch to Testcontainers for integration tests that must verify behavior against real external services for deterministic and reproducible results.

Keeping Spring Boot test configuration deterministic for CI pipelines involves applying structured test configuration patterns that make tests easy to reproduce, ensuring reliable integration and slice test execution across different environments.