unit-test-controller-layer

Unit testing REST controllers in isolation with MockMvc and mocked service dependencies. Provides patterns for unit testing @RestController and @Controller classes using MockMvc. Covers request/response handling, HTTP status codes, request parameter binding, validation, content negotiation, response headers, and exception handling with mocked service dependencies. Use for: controller tests, API endpoint testing, Spring MVC tests, mock HTTP requests, unit testing web layer endpoints, verifying REST controllers in isolation. - Covers testing all HTTP methods (GET, POST, PUT, PATCH, DELETE) with status code and response body validation using JsonPath assertions - Includes patterns for request parameter binding, validation errors, exception handling, and content negotiation across different Accept and Content-Type headers - Uses standalone MockMvc setup with Mockito to mock service layer dependencies, keeping tests focused on HTTP handling without integration test overhead - Provides examples for testing request/response headers, path variables, query parameters, and error scenarios (404, 400, 401, 500) - Setup standalone MockMvc : MockMvcBuilders.standaloneSetup(controller) for isolated testing - Mock service dependencies : Use @Mock for all services, @InjectMocks for the controller - Test HTTP methods : GET, POST, PUT, PATCH, DELETE with correct status codes - Validate responses...