322-frameworks-spring-boot-testing-integration-tests
Spring Boot Integration Testing
Apply Spring Boot integration testing guidelines for Spring Boot 4.0.x.
What is covered in this Skill?
- Integration test scope and purpose (verify wiring and contracts, not unit-test duplication)
- Testcontainers with @ServiceConnection for zero-config wiring (preferred)
- @DynamicPropertySource as fallback for containers without built-in service connection support
- Static @Container instances shared across test methods for performance
- MockMvcTester for fluent AssertJ-based HTTP assertions (Spring Boot 4.0.x)
- TestRestTemplate for full HTTP stack testing
- @DataJdbcTest / @DataJpaTest persistence slices (load only persistence layer, start faster)
- Data isolation: each test owns its scenario; no shared mutable state or ordering assumptions
- @MockitoBean for mock registration (Spring Boot 4.0.x — @MockBean removed)
- Resource lifecycle: Testcontainers JUnit integration for teardown; *IT / integration test separation
Scope: Apply recommendations based on the reference rules and good/bad code examples.
Constraints
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