spring-boot-testing
Spring Boot Testing
This skill provides expert guide for testing Spring Boot 4 applications with modern patterns and best practices.
Core Principles
- Test Pyramid: Unit (fast) > Slice (focused) > Integration (complete)
- Right Tool: Use the narrowest slice that gives you confidence
- AssertJ Style: Fluent, readable assertions over verbose matchers
- Modern APIs: Prefer MockMvcTester and RestTestClient over legacy alternatives
Which Test Slice?
| Scenario | Annotation | Reference |
|---|---|---|
| Controller + HTTP semantics | @WebMvcTest |
references/webmvctest.md |
| Repository + JPA queries | @DataJpaTest |
references/datajpatest.md |
| REST client + external APIs | @RestClientTest |
references/restclienttest.md |
| JSON (de)serialization | @JsonTest |
references/test-slices-overview.md |
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