spring-testing

Spring Boot integration tests using Testcontainers validate full application contexts by configuring @SpringBootTest with containerized dependencies, ensuring reliable and maintainable test execution across controllers, services, and repositories.

Slice testing in Spring Boot loads minimal application contexts for specific layers like @WebMvcTest or @DataJpaTest, whereas unit testing uses pure Mockito to validate individual components without loading the Spring context.

Yes, you can use Mockito with @WebMvcTest to test Spring Boot controllers by mocking service layers, allowing fast and reliable validation of REST API endpoints without starting a full server context.

The best way to organize Spring Boot test data is applying reusable patterns like data builders and object mother, combined with clear naming conventions to enforce test scope and maintainability across unit and integration tests.

Spring Boot test context failures during slice testing often occur when environment configuration guardrails are violated; this skill helps debug context failures by enforcing minimal context configuration and clear testing scope boundaries.