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Spring Boot Integration Testing
- Spring Boot Integration Testing focuses on testing real applications in a cohesive manner using Spring's tools.
- While JUnit and Mockito are great for isolated testing, Spring's integration testing framework tests the whole application.
- Spring MockMvc allows testing controllers without server deployment, simulating the full Spring MVC lifecycle.
- @WebMvcTest is for testing the web layer, focusing on MVC components and configuring MockMvc.
- @SpringBootTest creates a full application context for testing interaction between all beans and providing a realistic environment.
- @Import allows supplementing test slice with additional beans, while @ContextConfiguration gives explicit control over context setup.
- Common issues in integration testing include package structure for main configuration and deprecated MockBean usage.
- Mocking all repositories used by the Service class can prevent UnsatisfiedDependencyException during context initialization.
- Integration tests example includes testing a JobController that interacts with a JobService calling a Mongo Repo.
- Integration tests cover scenarios like successful job retrieval, empty results, missing query parameters, and service exceptions.
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