Spring Boot Testing
This is a comprehensive testing guide for Spring Boot 4 applications that cuts through the noise with a clear decision tree: use @WebMvcTest for controllers, @DataJpaTest for repositories, and plain JUnit for business logic. It emphasizes modern tools like MockMvcTester and RestTestClient over legacy alternatives, pairs everything with AssertJ for readable assertions, and includes practical references for each test slice. The best practices section is pragmatic, recommending 80% coverage with Jacoco and suggesting refactoring when a method needs more than 5-7 test cases. It's opinionated about the test pyramid and context caching, which is exactly what you want when learning a testing stack this deep.
- skills.sh installs
- 2.1K
- GitHub stars
- 41K
- last updated
- Aug 21, 2026
Install
$ npx -y skills add github/awesome-copilot --skill spring-boot-testing --agent claude-codeInstalls into .claude/skills of the current project.
Files
Spring Boot Testing
This skill provides expert guidance for testing Spring Boot applications with modern patterns and best practices. Examples target Spring Boot 4; see the compatibility note below for Boot 3.
Compatibility: detect first
Read the project's Spring Boot version and test dependencies before writing tests, and do not upgrade them implicitly.
| Spring Boot 3.x | Spring Boot 4.x | |
|---|---|---|
| JUnit | 5 (Jupiter) | 6 by default (same org.junit.jupiter.api annotations; JUnit 5 tests keep working) |
| Mock beans | @MockitoBean / @MockitoSpyBean from 3.4 (Spring Framework 6.2); @MockBean / @SpyBean are deprecated | @MockitoBean replaces @MockBean (do not use the old ones) |
| Test starters | spring-boot-starter-test covers everything | modular: add spring-boot-starter-webmvc-test, spring-boot-starter-data-jpa-test, ... |
| Slice imports | org.springframework.boot.test.autoconfigure... | moved, e.g. org.springframework.boot.webmvc.test.autoconfigure.WebMvcTest |
| Testcontainers | 1.x names | 2.x names (testcontainers-postgresql) |
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- Repository
- github.com/github/awesome-copilot
- Categories
- Testing & QA, Git & Pull Requests, AI & Agent Building, Java & JVM
- First seen
- Apr 16, 2026
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