Summary
This is a comprehensive testing guide for Spring Boot 4 that actually tells you which annotation to use when. It's built around the test pyramid and includes decision trees for choosing between @WebMvcTest, @DataJpaTest, @RestClientTest, and friends. The best part is the practical coverage: it shows you MockMvcTester (the new AssertJ-style API), Testcontainers for real database tests, and Instancio for generating test data. It also covers the Spring Boot 4 migration path from deprecated @MockBean to @MockitoBean. The complexity assessment section is refreshingly honest about when to refactor instead of writing 50 test cases for a god method. If you're moving to Spring Boot 4 or just tired of guessing which test slice to use, this gets you unstuck fast.
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npx -y skills add marcelorodrigo/agent-skills --skill spring-boot-testing --agent claude-codeInstalls into .claude/skills of the current project.
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belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
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Connect your Claude agent to live crypto prices and trading routes via 1inch
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Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
Try free for 7 days →Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.
Block now (100% free) →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Free an open-source skills that make AI coding agents easier to understand, verify, and control.
Download for free →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →
