Enhance NormalizeISBN to validate and convert ISBNs:
- Validate length (10 or 13 digits), return error if invalid
- Convert ISBN-10 to ISBN-13 by prefixing '978' and recalculating checksum
- Add NormalizeISBNSafe for backward compatibility in scanners
This ensures all ISBNs stored in database are valid ISBN-13 format.
- Remove handler parameter from test function calls
- Update test signatures to match new setupTestServer return values
- Fix compilation errors after test helper refactoring
- Maintain test functionality for kobo and media endpoints
New test file with 5 test suites:
- TestMediaItemISBNNormalization (8 test cases)
- TestMediaItemISBNEdgeCases (3 test cases)
- TestMediaItemsPagination (5 test cases)
- TestMediaItemLibraryRequirement (2 test cases)
- TestUpdateMediaItemISBN (1 test case)
Features:
- Tests use /api/media-items endpoint (not deprecated /api/ebooks)
- Real API calls (not mock handlers)
- Comprehensive ISBN-10/ISBN-13 normalization coverage
- Pagination validation with limit/offset edge cases
- Library requirement validation
This replaces the functionality lost from isbn_and_library_test.go
with modern, working tests using current API endpoints.
Phase 3: Test Suite Cleanup - Replacement Tests
john-okeefe