A practical guide to writing unit, slice, and integration tests for Spring Boot applications. Covers unit testing with JUnit 5 and Mockito using @Mock and @InjectMocks, slice testing the web layer with @WebMvcTest and @MockBean, and full integration testing with @SpringBootTest and @AutoConfigureMockMvc. Includes annotated code examples for each test type and explains the trade-offs between test speed and coverage scope.
Table of contents
Testing Spring Boot applicationsTypes of TestsUnit Testing with JUnit 5 and MockitoTesting application slices using Spring’s Test Slice annotationsIntegration Tests using @SpringBootTestRun testsSummarySort: