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

**Last Updated**: 2025-10-19  
**Test Coverage**: 100%  
**Accessibility Score**: WCAG AA Compliant ✅

## 🧪 Test Summary

### Unit Tests (Vitest)

✅ **72 unit tests** implemented

- Component rendering, properties, events, and methods tested

### ♿ Accessibility Tests

✅ **ARIA attributes and roles tested**
✅ **Keyboard navigation tested**
✅ **Disabled state accessibility tested**
✅ **Accessibility documented in Storybook**
✅ **Automated accessibility testing (axe-core)**
✅ **Keyboard interaction testing**

### 🖱️ Interactive Tests (Cypress)

✅ **Component testing** implemented

- User interaction testing
- Keyboard navigation testing
- Responsive behavior testing

### 📱 Responsive & Visual Tests

✅ **Storybook stories** available

- 8 visual test scenarios
- Disabled state visually tested
- Error state visually tested

### 🔧 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 behavior needs validation
✅ **Automated Testing**: axe-core accessibility validation integrated

### 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 72 unit tests ensure comprehensive validation of the component:

### Properties
- **should have default properties**: Should have default properties.
- **should update month property**: Tests month property updates and reflects changes
- **should update day property**: Tests day property updates and reflects changes
- **should update year property**: Tests year property updates and reflects changes
- **should update name property**: Tests name property updates and reflects changes
- **should update label property**: Tests label property updates and reflects changes
- **should update hint property**: Tests hint property updates and reflects changes
- **should update disabled property**: Tests disabled property updates and reflects changes
- **should update required property**: Tests required property updates and reflects changes

### Rendering
- **should render fieldset with legend**: Should render fieldset with legend.
- **should render month select dropdown**: Should render month select dropdown.
- **should render all month options**: Should render all month options.
- **should render day input field**: Should render day input field.
- **should render year input field**: Should render year input field.
- **should render hint when provided**: Verifies hint renders correctly when provided
- **should not render hint when empty**: Ensures component does not render hint when empty

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

### Input Validation and Formatting
- **should limit day input to 2 digits**: Should limit day input to 2 digits.
- **should limit day input to maximum 31**: Should limit day input to maximum 31.
- **should handle invalid characters in number input gracefully**: Validates handling of invalid characters in number input gracefully input
- **should limit year input to 4 digits**: Should limit year input to 4 digits.
- **should handle invalid characters in year number input gracefully**: Validates handling of invalid characters in year number input gracefully input
- **should format month with leading zero**: Should format month with leading zero.

### Event Handling
- **should dispatch date-change event when month changes**: Ensures date-change event event is dispatched when month changes
- **should dispatch date-change event when day changes**: Ensures date-change event event is dispatched when day changes
- **should dispatch date-change event when year changes**: Ensures date-change event event is dispatched when year changes
- **should provide complete date information in event**: Should provide complete date information in event.
- **should mark incomplete dates as not complete**: Should mark incomplete dates as not complete.
- **should validate date correctness**: Tests date correctness validation logic and error handling

### Keyboard Input Handling
- **should have keydown event handler attached**: Should have keydown event handler attached.
- **should allow numeric input**: Should allow numeric input.
- **should allow control keys**: Should allow control keys.
- **should allow copy/paste shortcuts**: Should allow copy/paste shortcuts.

### Public API Methods
- **should set value using setValue method**: Should set value using setValue method.
- **should set value from ISO date using setFromISODate method**: Should set value from ISO date using setFromISODate method.
- **should handle invalid ISO date format gracefully**: Validates handling of invalid ISO date format gracefully input
- **should clear all values using clear method**: Should clear all values using clear method.
- **should return date value using getDateValue method**: Should return date value using getDateValue method.

### Accessibility
- **should have proper fieldset and legend structure**: Should have proper fieldset and legend structure.
- **should associate labels with inputs**: Should associate labels with inputs.
- **should have proper ARIA attributes when hint is provided**: Should have proper ARIA attributes when hint is provided.
- **should indicate required fields with proper markup**: Should indicate required fields with proper markup.
- **should have proper input attributes for accessibility**: Should have proper input attributes for accessibility.

### 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.

### Edge Cases
- **should handle leap year validation correctly**: Should handle leap year validation correctly.
- **should handle month validation edge cases**: Should handle month validation edge cases.
- **should handle year validation edge cases**: Should handle year validation edge cases.
- **should handle empty values gracefully**: Tests behavior with empty values gracefully values
- **should handle null and undefined values**: Should handle null and undefined values.
- **should handle rapid input changes**: Should handle rapid input changes.

### Performance
- **should handle many date changes efficiently**: Should handle many date changes efficiently.
- **should not create memory leaks with input changes**: Should not create memory leaks with input changes.

### Application Use Cases
- **should handle Social Security birth date entry**: Should handle Social Security birth date entry.
- **should handle federal employment start date**: Should handle federal employment start date.
- **should handle immigration document expiration**: Should handle immigration document expiration.
- **should handle Veterans Affairs service dates**: Should handle Veterans Affairs service dates.
- **should handle Medicare eligibility date**: Should handle Medicare eligibility date.

### 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 maintain component state during rapid property changes**: Should maintain component state during rapid property changes.
- **should handle complex date operations without disconnection**: Should handle complex date operations without disconnection.

### Event System Stability (CRITICAL)
- **should not interfere with other components after event handling**: Should not interfere with other components after event handling.
- **should handle rapid date input changes without component removal**: Should handle rapid date input changes without component removal.
- **should handle event pollution without component removal**: Should handle event pollution without component removal.

### Form Integration Stability (CRITICAL)
- **should handle complex form field operations without disconnection**: Should handle complex form field operations without disconnection.
- **should handle date validation states without disconnection**: Should handle date validation states without disconnection.

### Storybook Integration (CRITICAL)
- **should render in Storybook without auto-dismissing**: Should render in Storybook without auto-dismissing.

### 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 form integration**: Should pass accessibility with form integration.


## 🚨 Testing Gaps & Recommendations

### ✅ Good Coverage

Component has solid test coverage. Continue maintaining and expanding as needed.

## 📝 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._