521-frameworks-micronaut-testing-unit-tests

# Micronaut Unit Testing Apply fast testing strategies for Micronaut: Mockito-first, narrow @MicronautTest when HTTP or DI replacement is required. **What is covered in this Skill?** - Pure JUnit 5 + Mockito without container boot - @MicronautTest with @MockBean factory methods for collaborators - HttpClient blocking exchanges against the embedded server - @Property for deterministic configuration in tests - @ParameterizedTest with @CsvSource / @MethodSource - Naming: *Test → Surefire; *IT → Failsafe when configured - When to escalate to `@522` **Scope:** Apply recommendations based on the reference rules and good/bad code examples. ## Constraints Compile before test refactors; verify the full suite after. - **MANDATORY**: Run `./mvnw compile` or `mvn compile` before applying any change - **SAFETY**: If compilation fails, stop immediately - **VERIFY**: Run `./mvnw clean verify` or `mvn clean verify` after applying improvements - **BEFORE APPLYING**: Read the reference for detailed rules and examples - **EDGE CASE**: If request scope is ambiguous, stop and ask a clarifying question before applying changes - **EDGE CASE**: If required inputs, files, or tooling are missing, report what is missing and ask whether to proceed with setup guidance ## When to use this skill - Add or improve unit tests in a Micronaut project - Reduce unnecessary @MicronautTest usage with Mockito-first tests ## Workflow 1. **Read reference and assess project context** Read `references/521-frameworks-micronaut-testing-unit-tests.md` and inspect the current project setup before proposing changes. 2. **Gather scope and decide target improvements** Identify requested outcomes, constraints, and the minimum safe set of changes to apply. 3. **Apply framework-aligned changes** Implement or refactor configuration/code following the reference patterns and project conventions. 4. **Run verification and report results** Execute appropriate build/tests and summarize what changed, what was verified, and any follow-up actions. ## Reference For detailed guidance, examples, and constraints, see [references/521-frameworks-micronaut-testing-unit-tests.md](references/521-frameworks-micronaut-testing-unit-tests.md).