# Test Improvements TODO

## ImageViewer Mock Units - Completed ✅
- [x] Create comprehensive mock units for ImageViewer component
- [x] Implement 4 mock levels (Simple, Standard, Complex, Integration)
- [x] Fix template structure issues (Teleport/Transition complexity)
- [x] Resolve event simulation problems (SupportedEventInterface errors)
- [x] Fix platform detection logic (mobile vs desktop)
- [x] Implement analytics tracking in integration mock
- [x] Achieve 38/39 tests passing (97% success rate)

## Immediate Test Improvements Needed 🔧

### 1. Fix Remaining ImageViewer Test
- [ ] **Fix mobile share button test** - Vue reactivity issue with computed properties
  - [ ] Investigate Vue 3 reactivity system for computed properties
  - [ ] Try different approaches: `nextTick()`, `flushPromises()`, or reactive refs
  - [ ] Consider using `shallowRef()` for userAgent to force reactivity

### 2. Event Simulation Improvements
- [ ] **Create global event simulation utilities**
  - [ ] Build `triggerEvent()` helper that works with Vue Test Utils
  - [ ] Handle `SupportedEventInterface` errors consistently
  - [ ] Create fallback methods for problematic event types
- [ ] **Improve test environment setup**
  - [ ] Configure proper DOM environment for event simulation
  - [ ] Mock browser APIs more comprehensively
  - [ ] Add global test utilities for common patterns

### 3. Mock Architecture Enhancements
- [ ] **Create reusable mock patterns**
  - [ ] Extract common mock utilities (`createMockUserAgent`, etc.)
  - [ ] Build mock factory patterns for other components
  - [ ] Create mock validation helpers
- [ ] **Improve mock documentation**
  - [ ] Add JSDoc comments to all mock functions
  - [ ] Create usage examples for each mock level
  - [ ] Document mock limitations and workarounds

## Component-Specific Test Improvements 🧪

### 4. Expand Mock Units to Other Components
- [ ] **QR Scanner Component**
  - [ ] Create mock for `WebInlineQRScanner`
  - [ ] Mock camera permissions and device detection
  - [ ] Test platform-specific behavior (web vs mobile)
- [ ] **Platform Service Components**
  - [ ] Mock `CapacitorPlatformService`
  - [ ] Mock `WebPlatformService`
  - [ ] Mock `ElectronPlatformService`
- [ ] **Database Components**
  - [ ] Mock `AbsurdSqlDatabaseService`
  - [ ] Test migration scenarios
  - [ ] Mock IndexedDB operations

### 5. Integration Test Improvements
- [ ] **Cross-component communication**
  - [ ] Test ImageViewer + QR Scanner integration
  - [ ] Test platform service + component interactions
  - [ ] Mock complex user workflows
- [ ] **End-to-end scenarios**
  - [ ] Complete user journeys (scan → view → share)
  - [ ] Error recovery flows
  - [ ] Performance testing scenarios

## Test Infrastructure Improvements 🏗️

### 6. Test Environment Setup
- [ ] **Improve Vitest configuration**
  - [ ] Add proper DOM environment setup
  - [ ] Configure global mocks for browser APIs
  - [ ] Add test utilities for common patterns
- [ ] **Create test helpers**
  - [ ] `createComponentWrapper()` utility
  - [ ] `mockPlatformService()` helper
  - [ ] `simulateUserInteraction()` utilities

### 7. Performance Testing
- [ ] **Add performance benchmarks**
  - [ ] Component render time testing
  - [ ] Memory usage monitoring
  - [ ] Image loading performance tests
- [ ] **Load testing scenarios**
  - [ ] Multiple ImageViewer instances
  - [ ] Large image handling
  - [ ] Concurrent operations

## Quality Assurance Improvements 📊

### 8. Test Coverage Enhancement
- [ ] **Add missing test scenarios**
  - [ ] Edge cases for image formats
  - [ ] Network error handling
  - [ ] Accessibility compliance tests
- [ ] **Mutation testing**
  - [ ] Verify test quality with mutation testing
  - [ ] Ensure tests catch actual bugs
  - [ ] Improve test reliability

### 9. Test Documentation
- [ ] **Create test guidelines**
  - [ ] Best practices for Vue component testing
  - [ ] Mock unit design patterns
  - [ ] Troubleshooting common test issues
- [ ] **Add test examples**
  - [ ] Example test files for each component type
  - [ ] Integration test examples
  - [ ] Performance test examples

## Advanced Testing Features 🚀

### 10. Visual Regression Testing
- [ ] **Add visual testing**
  - [ ] Screenshot comparison for ImageViewer
  - [ ] Visual diff testing for UI changes
  - [ ] Cross-platform visual consistency
- [ ] **Accessibility testing**
  - [ ] Automated accessibility checks
  - [ ] Screen reader compatibility tests
  - [ ] Keyboard navigation testing

### 11. Contract Testing
- [ ] **API contract testing**
  - [ ] Test component prop contracts
  - [ ] Event emission contracts
  - [ ] Service interface contracts
- [ ] **Mock contract validation**
  - [ ] Ensure mocks match real component behavior
  - [ ] Validate mock completeness
  - [ ] Test mock accuracy

## Priority Levels 📋

### High Priority (Next Sprint)
1. Fix mobile share button test
2. Create global event simulation utilities
3. Expand mock units to QR Scanner component
4. Improve test environment setup

### Medium Priority (Next Month)
1. Create reusable mock patterns
2. Add performance testing
3. Improve test documentation
4. Add visual regression testing

### Low Priority (Future)
1. Advanced integration testing
2. Contract testing
3. Mutation testing
4. Cross-platform visual testing

## Success Metrics 📈

### Current Status
- ✅ **97% test pass rate** (38/39 tests)
- ✅ **4 mock levels** implemented
- ✅ **Comprehensive coverage** of ImageViewer functionality
- ✅ **Behavior-focused testing** approach working

### Target Metrics
- [ ] **100% test pass rate** (fix remaining test)
- [ ] **10+ components** with mock units
- [ ] **< 100ms** average test execution time
- [ ] **90%+ code coverage** for critical components
- [ ] **Zero flaky tests** in CI/CD pipeline

## Notes 📝

### Lessons Learned
- Vue 3 reactivity can be tricky with computed properties in tests
- Direct method calls work better than `trigger()` for complex events
- Mock levels provide excellent flexibility for different testing needs
- Behavior-focused testing is more maintainable than implementation-focused

### Technical Debt
- Some TypeScript linter errors in mock files (non-blocking)
- Event simulation needs better abstraction
- Test environment could be more robust
- Mock documentation could be more comprehensive

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*Last updated: 2025-01-07*
*Status: Active development*