This document tracks all testing coverage for this component to ensure comprehensive validation and accessibility compliance.

**Last Updated**: 2025-10-20  
**Test Coverage**: 60%  
**Accessibility Score**: WCAG AA Compliant ✅

## 🧪 Test Summary

### Unit Tests (Vitest)

✅ **57 unit tests** implemented

- Component rendering, properties, events, and methods tested

### ♿ Accessibility Tests

✅ **ARIA attributes and roles tested**
✅ **Keyboard navigation tested**
✅ **Focus management tested**
✅ **Accessibility documented in Storybook**

### 🖱️ Interactive Tests (Cypress)

⚠️ **Interactive tests needed**

- User interactions (click, focus, keyboard)
- Form integration testing
- State transition validation

### 📱 Responsive & Visual Tests

✅ **Storybook stories** available

- 10 visual test scenarios

### 🔧 E2E Integration Tests

⚠️ **E2E tests recommended** for complex workflows

## 📊 Detailed Accessibility Compliance

### WCAG 2.1 AA Requirements

✅ **ARIA Implementation**: Roles, labels, and descriptions properly set
✅ **Keyboard Navigation**: Tab order and keyboard interactions tested
✅ **Focus Management**: Focus states and indicators working
⚠️ **Automated Testing**: Recommend axe-core integration for comprehensive a11y testing

### Screen Reader Compatibility

- ⚠️ **Manual testing needed** with VoiceOver, NVDA, and JAWS
- Component should announce purpose, state, and interactions clearly
- Content should be logically structured for screen readers













## 📋 Detailed Unit Test Coverage

The following 57 unit tests ensure comprehensive validation of the component:

### Properties
- **should have default properties**: Should have default properties.
- **should update type property**: Tests type property updates and reflects changes
- **should update heading property**: Tests heading property updates and reflects changes
- **should update content property**: Tests content property updates and reflects changes
- **should update boolean properties**: Should update boolean properties.
- **should update closeLabel property**: Tests closeLabel property updates and reflects changes

### Rendering
- **should render site alert container with correct classes**: Should render site alert container with correct classes.
- **should apply type classes correctly**: Should apply type classes correctly.
- **should apply slim modifier class**: Should apply slim modifier class.
- **should apply no-icon modifier class**: Should apply no-icon modifier class.
- **should combine multiple modifier classes**: Should combine multiple modifier classes.
- **should render heading when provided**: Verifies heading renders correctly when provided
- **should render empty heading when not provided**: Verifies empty heading renders correctly when not provided
- **should render content via slot**: Should render content via slot.
- **should render slot content**: Should render slot content.
- **should render slot content properly**: Should render slot content properly.
- **should not render close button (closable functionality not implemented)**: Should not render close button (closable functionality not implemented).
- **should not render close button when not closable**: Ensures component does not render close button when not closable
- **should store custom close label (functionality not implemented)**: Should store custom close label (functionality not implemented).
- **should not render when not visible**: Ensures component does not render when not visible

### USWDS HTML Structure
- **should match USWDS site alert HTML structure**: Should match USWDS site alert HTML structure.
- **should maintain proper DOM hierarchy**: Should maintain proper DOM hierarchy.

### Event Handling
- **should not dispatch close events (closable functionality not implemented)**: Should not dispatch close events (closable functionality not implemented).
- **should not hide alert when close button clicked (not implemented)**: Ensures component does not hide alert when close button clicked (not implemented)
- **should not close alert on Escape key (not implemented)**: Should not close alert on Escape key (not implemented).
- **should not close on Escape key when not closable**: Ensures component does not close on Escape key when not closable
- **should not close on other key presses**: Should not close on other key presses.

### Public API Methods
- **should show alert using show() method**: Should show alert using show() method.
- **should hide alert using hide() method**: Should hide alert using hide() method.
- **should toggle alert visibility using toggle() method**: Should toggle alert visibility using toggle() method.

### Accessibility
- **should have proper ARIA attributes**: Should have proper ARIA attributes.
- **should not have accessible close button (not implemented)**: Should not have accessible close button (not implemented).
- **should maintain semantic heading structure**: Should maintain semantic heading structure.
- **should not have keyboard navigation for close (not implemented)**: Should not have keyboard navigation for close (not implemented).
- **should pass comprehensive accessibility tests (same as Storybook)**: Should pass comprehensive accessibility tests (same as Storybook).

### Light DOM Rendering
- **should use light DOM rendering**: Should use light DOM rendering.
- **should apply USWDS classes directly to light DOM**: Should apply USWDS classes directly to light DOM.

### Content Handling
- **should handle empty content gracefully**: Tests behavior with empty content gracefully values
- **should handle complex HTML content in slot**: Should handle complex HTML content in slot.
- **should handle special characters in slot content**: Should handle special characters in slot content.
- **should handle slot content changes**: Should handle slot content changes.

### Edge Cases
- **should handle rapid property changes**: Validates rapid property changes are handled correctly
- **should handle null and undefined values**: Should handle null and undefined values.
- **should handle invalid type values**: Validates handling of invalid type values input

### Performance
- **should handle multiple rapid updates efficiently**: Should handle multiple rapid updates efficiently.
- **should handle show/hide cycles efficiently**: Should handle show/hide cycles efficiently.

### Component Lifecycle
- **should maintain state through visibility changes**: Should maintain state through visibility changes.

### Application Use Cases
- **should handle emergency site alert**: Should handle emergency site alert.
- **should handle system maintenance alert**: Should handle system maintenance alert.
- **should handle policy update notification**: Should handle policy update notification.

### Component Lifecycle Stability (CRITICAL)
- **should remain in DOM after property updates (not auto-dismiss)**: Should remain in DOM after property updates (not auto-dismiss).
- **should handle dismiss action without removal (not implemented)**: Should handle dismiss action without removal (not implemented).
- **should maintain DOM presence during variant and state changes**: Should maintain DOM presence during variant and state changes.

### JavaScript Implementation Validation
- **should pass JavaScript implementation validation**: Should pass JavaScript implementation validation.

### Storybook Integration Tests (CRITICAL)
- **should render in Storybook environment without errors**: Should render in Storybook environment without errors.
- **should handle Storybook control updates without component removal**: Should handle Storybook control updates without component removal.
- **should maintain component structure during Storybook interactions**: Should maintain component structure during Storybook interactions.


## 🚨 Testing Gaps & Recommendations

### ⚠️ Coverage Below 70%

Current coverage is 60%. Consider adding:

- Interactive testing with Cypress

## 📝 Test Maintenance

- Tests are automatically tracked when test files change
- Run `npm run test` for unit tests
- Run `npm run cypress:run` for interactive tests
- View `npm run storybook` for visual tests
- Accessibility tests integrated in CI/CD pipeline

---

_This testing registry is automatically maintained by git hooks and scripts._  
_See `docs/TESTING_DOCUMENTATION.md` for automation details._