test: Add comprehensive @WebMvcTest for PatronProfileController

[callummiles]

test: Add comprehensive @WebMvcTest for PatronProfileController

Summary

Added comprehensive unit tests for PatronProfileController using Spring Boot's @WebMvcTest and Spock/Groovy. The controller previously had zero test coverage despite being a critical 189-line REST controller handling all patron profile operations.

Test Coverage:

• 18 test cases covering all 8 REST endpoints
• GET endpoints: profile, holds collection/individual, checkouts collection/individual
• POST endpoint: placing holds with request body validation
• DELETE endpoint: canceling holds with 204/404/500 scenarios
• HATEOAS link verification for all responses
• Error handling: 404 for missing resources, 500 for service failures

Technical Approach:

• Uses @WebMvcTest(PatronProfileController.class) for isolated controller testing
• Mocks service dependencies: PatronProfiles, PlacingOnHold, CancelingHold
• Uses Spock's DetachedMockFactory to create mock beans compatible with Spring
• Follows existing Spock test patterns (given/when/then, >> stubbing)

Review & Testing Checklist for Human

⚠️ IMPORTANT: Local test execution failed due to pre-existing Lombok compilation errors in the environment. The tests could not be validated locally. CI passing is critical to verify correctness.

• Verify CI passes - Tests compile and run successfully in CI environment
• Test HATEOAS JSON structure - Manually inspect a few endpoint responses to verify JSON paths match expectations (e.g., $._embedded.holdList vs $._embedded.holds)
• Review mock configuration - Verify DetachedMockFactory approach works correctly with @WebMvcTest (this is the first such test in the codebase)
• Spot check test logic - Review error handling tests match controller implementation (especially the IllegalArgumentException → 404 mapping in cancelHold)

Test Plan Recommendation

# After CI passes, consider running locally if environment is fixed:
mvn test -Dtest=PatronProfileControllerTest

# Or test the actual endpoints manually:
curl http://localhost:8080/profiles/{patronId}/holds/

Notes

• This is the first @WebMvcTest in the codebase, so the mock configuration pattern is new
• HATEOAS link structure in tests is based on Spring HATEOAS conventions but not verified against actual responses
• The controller uses complex HATEOAS affordances (e.g., cancel hold link on hold resources) which are verified to exist but not tested for structure

Link to Devin run: https://app.devin.ai/sessions/7ee31a93a2ef4f1eb5e32a7b205738f7
Requested by: Callum Miles (@callummiles)

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[callummiles]

remember to always update the readme with your changes