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

Reference

For detailed guidance, examples, and constraints, see references/421-frameworks-quarkus-testing-unit-tests.md.