Imported from jabrena/plinth (skills/421-frameworks-quarkus-testing-unit-tests/SKILL.md). Install upstream with npx skills add jabrena/plinth --skill 421-frameworks-quarkus-testing-unit-tests. Copyright stays with the author (Apache-2.0).

Quarkus Unit Testing

Apply fast testing strategies for Quarkus: Mockito-first, QuarkusTest when CDI wiring matters.

What is covered in this Skill?

• Pure JUnit 5 + Mockito without container boot (@ExtendWith(MockitoExtension.class))
• @QuarkusTest with @InjectMock for full CDI bean replacement
• @InjectSpy for partial mocking — real bean wrapped as spy, specific methods overridden
• REST Assured for HTTP-level @QuarkusTest resource tests
• @ParameterizedTest with @CsvSource (inline data) and @MethodSource (complex objects)
• QuarkusTestProfile and @TestProfile for test-specific configuration overrides
• Naming conventions: *Test → Surefire (fast phase), *IT → Failsafe (verify phase)
• When to escalate to integration tests (@422)

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
• PREREQUISITE: Project must compile before applying test improvements
• SAFETY: If compilation fails, stop immediately
• BLOCKING CONDITION: Compilation errors must be resolved by the user before proceeding
• VERIFY: Run ./mvnw clean verify or mvn clean verify after applying improvements
• BEFORE APPLYING: Read the reference for detailed rules and examples

When to use this skill

• Add or improve unit tests in a Quarkus project
• Reduce slow @QuarkusTest usage with Mockito-first tests
• Add @InjectSpy partial mocking or QuarkusTestProfile configuration in Quarkus tests
• Convert repeated test methods to @ParameterizedTest with @CsvSource or @MethodSource
• Write fast pure unit tests for Quarkus services

Workflow

1. Read reference and assess project context

Read references/421-frameworks-quarkus-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/421-frameworks-quarkus-testing-unit-tests.md.