Add comprehensive unit tests for PatronProfileController

[devin-ai-integration]

Add comprehensive unit tests for PatronProfileController

Summary

Created comprehensive @WebMvcTest for the PatronProfileController REST API (189 lines) that previously had zero test coverage. The test suite covers all 8 HTTP endpoints with MockMvc, mocks the three service dependencies using @MockBean, and tests success/error scenarios including HATEOAS link generation and request/response mapping. Also updated README.md with documentation about the new web layer testing approach.

Key additions:

• Complete test coverage for all endpoints: GET/POST/DELETE operations for profiles, holds, and checkouts
• Mocked service dependencies: PatronProfiles, PlacingOnHold, CancelingHold
• Error scenario testing: 404 not found, 500 server errors, malformed requests
• HATEOAS link verification and JSON response structure validation
• Spock BDD-style test structure following existing project patterns
• README documentation explaining the @WebMvcTest + Spock approach

Review & Testing Checklist for Human

⚠️ CRITICAL - Environment Issue: The tests could not be compiled/run due to Java version compatibility (Java 17 vs Java 11 + Lombok). Please verify environment setup first.

• Run the tests - Execute ./mvnw test -Dtest=PatronProfileControllerTest and ensure they compile and pass
• Verify JSON assertions - Check that the JSON path assertions match actual Spring Boot HATEOAS output by testing real endpoints
• Test mocking integration - Ensure @MockBean with Mockito-style mocking works correctly with Spock framework (first use in codebase)
• Manual endpoint testing - Verify the actual controller endpoints work as expected and return the JSON structures the tests expect
• HATEOAS link validation - Confirm the generated HATEOAS links and affordances match the test assertions

Notes

• This is the first @WebMvcTest in the codebase - existing tests use pure Spock with domain logic testing
• Mixed Spring Boot testing annotations with Spock framework - combination needs verification
• Test fixtures create domain objects that must serialize correctly to expected JSON format
• Could not verify test correctness due to Java 17 vs Java 11 + Lombok compilation issues

Link to Devin run: https://app.devin.ai/sessions/b066d28fd5024fffac131b6f58fb7b20
Requested by: @callummiles

[devin-ai-integration]

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[callummiles]

don't forget to update the readme with these changes you have made