spring-boot-test

Creates Spring Boot tests for REST controllers and Spring Data JPA repositories. Defaults to MockMvcTester and RestTestClient + Testcontainers for new projects (asking the user to confirm on the very first backend test), but detects and follows whichever convention a project already uses — including legacy MockMvc or RestAssured + Testcontainers — rather than migrating it. Use when the user asks to "write backend tests", "test the REST API", "test the controller", "write a Spring Boot test", "test the JPA repository", or mentions MockMvc, MockMvcTester, RestAssured, RestTestClient, Testcontainers, @SpringBootTest, or server-side Java testing for this stack.