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

**Last Updated**: 2025-10-20  
**Test Coverage**: 50%  
**Accessibility Score**: In Progress ⚠️

## 🧪 Test Summary

### Unit Tests (Vitest)

✅ **53 unit tests** implemented

- Component rendering, properties, events, and methods tested

### ♿ Accessibility Tests

✅ **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

- 5 visual test scenarios

### 🔧 E2E Integration Tests

⚠️ **E2E tests recommended** for complex workflows

## 📊 Detailed Accessibility Compliance

### WCAG 2.1 AA Requirements

⚠️ **ARIA Implementation**: Needs validation for roles and labels
⚠️ **Keyboard Navigation**: Needs keyboard accessibility testing
⚠️ **Focus Management**: Focus behavior needs validation
⚠️ **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 53 unit tests ensure comprehensive validation of the component:

### Default Properties
- **should have correct default properties**: Should have correct default properties.

### Basic Rendering
- **should render slot when items array is empty**: Verifies slot renders correctly when items array is empty
- **should render ordered list when items are provided**: Verifies ordered list renders correctly when items are provided
- **should render correct number of list items**: Should render correct number of list items.
- **should apply USWDS process list classes**: Should apply USWDS process list classes.

### Process Item Content
- **should render item headings**: Should render item headings.
- **should render item content**: Should render item content.
- **should render HTML content correctly**: Should render HTML content correctly.
- **should handle complex HTML content**: Should handle complex HTML content.

### Heading Level Customization
- **should use default h4 heading level**: Should use default h4 heading level.
- **should render h1 headings when specified**: Verifies h1 headings renders correctly when specified
- **should render h2 headings when specified**: Verifies h2 headings renders correctly when specified
- **should render h3 headings when specified**: Verifies h3 headings renders correctly when specified
- **should render h5 headings when specified**: Verifies h5 headings renders correctly when specified
- **should render h6 headings when specified**: Verifies h6 headings renders correctly when specified
- **should fall back to h4 for invalid heading level**: Should fall back to h4 for invalid heading level.
- **should update heading level dynamically**: Should update heading level dynamically.

### Slot Content
- **should render slot content when no items provided**: Verifies slot content renders correctly when no items provided
- **should override slot content when items are provided**: Should override slot content when items are provided.

### Dynamic Updates
- **should update when items are added**: Should update when items are added.
- **should update when items are removed**: Should update when items are removed.
- **should update when item content changes**: Should update when item content changes.
- **should clear list when items are emptied**: Should clear list when items are emptied.

### Accessibility Features
- **should use semantic ordered list**: Should use semantic ordered list.
- **should maintain proper heading hierarchy**: Should maintain proper heading hierarchy.
- **should structure content semantically**: Should structure content semantically.

### Edge Cases
- **should handle empty headings**: Tests behavior with empty headings values
- **should handle empty content**: Tests behavior with empty content values
- **should handle special characters in heading**: Should handle special characters in heading.
- **should handle script tags in content safely**: Should handle script tags in content safely.
- **should handle very long content**: Should handle very long content.
- **should handle unicode characters**: Should handle unicode characters.

### Light DOM Rendering
- **should render in light DOM for USWDS compatibility**: Should render in light DOM for USWDS compatibility.

### USWDS CSS Classes
- **should apply all required USWDS classes**: Should apply all required USWDS classes.

### Performance Considerations
- **should handle large lists efficiently**: Should handle large lists efficiently.
- **should handle rapid updates efficiently**: Should handle rapid updates efficiently.

### CRITICAL: Component Lifecycle Stability
- **should remain in DOM after property changes**: Should remain in DOM after property changes.
- **should maintain element stability during process item updates**: Should maintain element stability during process item updates.
- **should preserve DOM connection through heading level changes**: Should preserve DOM connection through heading level changes.
- **should maintain stability during complex content updates**: Should maintain stability during complex content updates.

### CRITICAL: Event System Stability
- **should not pollute global event handling**: Should not pollute global event handling.
- **should maintain stability during rapid property changes**: Should maintain stability during rapid property changes.
- **should maintain stability during rapid item array changes**: Should maintain stability during rapid item array changes.

### CRITICAL: Process List State Management Stability
- **should maintain DOM connection during slot to items transition**: Should maintain DOM connection during slot to items transition.
- **should preserve element stability during content rendering**: Should preserve element stability during content rendering.
- **should maintain stability during large list operations**: Should maintain stability during large list operations.

### CRITICAL: Storybook Integration
- **should render in Storybook-like environment without auto-dismiss**: Should render in Storybook-like environment without auto-dismiss.
- **should handle Storybook args updates without component removal**: Should handle Storybook args updates without component removal.
- **should maintain stability during complex Storybook interactions**: Should maintain stability during complex Storybook interactions.

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

### Accessibility Compliance (CRITICAL)
- **should pass comprehensive accessibility tests (same as Storybook)**: Should pass comprehensive accessibility tests (same as Storybook).
- **should maintain accessibility during dynamic updates**: Should maintain accessibility during dynamic updates.
- **should pass accessibility with government use cases**: Should pass accessibility with government use cases.


## 🚨 Testing Gaps & Recommendations

### ⚠️ Coverage Below 70%

Current coverage is 50%. Consider adding:

- More comprehensive accessibility testing
- 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

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