Removed unit tests that couldn't work without a database (nil db would
panic). Added comprehensive integration tests for the PreviewCollection
endpoint covering:
- Authentication (no auth, valid auth)
- Input validation (missing/invalid library ID, invalid JSON)
- Manual book selection
- Rule-based filtering
- Limit parameter handling
- Duplicate and invalid book ID handling
Phase 11 - Unit and Integration Tests
Service Layer Tests (dashboard_service_test.go):
- Test filterHiddenCollections with multiple scenarios
- Test reorderCollections with custom orders
- Test sortByPriority sorting logic
- All 6 tests passing
Handler Tests (dashboard_test.go):
- Test BuildSections type conversion
- Test textToString helper function
- Test getViewAllURL mapping
- All 7 tests passing
Preview Tests (collections_preview_test.go):
- Test preview endpoint validation
- Test limit validation
- Test rule validation
- 6 test scenarios
Integration Tests (dashboard_integration_test.go):
- Test GET /api/dashboard/sections end-to-end
- Test PUT /api/dashboard/preferences
- Test POST /api/dashboard/restore-system-collection
- Test authentication and validation
- 9 test scenarios total
Part of Carousel Dashboard Plan completion
john-okeefe