controller-testing

You can test Spring Boot controllers without a real database by using @WebMvcTest with MockMvc to slice the web layer and Mockito to mock service dependencies, ensuring fully deterministic and isolated endpoint tests.

Writing JUnit 5 tests for CRUD API validation involves using MockMvc to simulate HTTP requests and assert status codes, response bodies, and error messages for invalid inputs and not found edge cases.

Yes, @WebMvcTest supports CI-ready test suites by providing repeatable, isolated tests with clear naming conventions that verify API correctness without relying on external database infrastructure during pipeline execution.

The best way to verify status codes and error messages is using MockMvc to perform requests and assert exact HTTP responses, combined with JUnit 5 and Mockito to validate controller behavior deterministically.

Yes, you can use Mockito to mock service dependencies when testing Spring Boot web layers with @WebMvcTest, ensuring controller tests remain isolated and fully deterministic without requiring real database connections.