M04 Q41 How do you perform integration testing with @SpringBootTest for a web application?

Integration Test by definition, should check interactions between few components of the system (at least two real, not-mocked components) to check if those components are delivering expected functionalities when working together. In each case when writing Integration Test you should decide how many components should interact in the test for it to be meaningful. Usually, you should decide on smallest possible amount of components that are enough to test specific functionality. Components that are not meaningful can be omitted, or mocked with usage of @MockBean annotation.

Web components tests (Controller Tests, Rest Controller Tests), if tested in Integration way, should be written in a way for test to make a HTTP Request and check HTTP Response. This kind of approach results in meaningful test, which delivers feedback that actually checks if component works correctly.

Spring Boot allows you to write Integration Tests for Web Components in two ways: