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)

✅ **69 unit tests** implemented

- Component rendering, properties, events, and methods tested

### ♿ Accessibility Tests

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

### 🖱️ Interactive Tests (Cypress)

✅ **Component testing** implemented

- User interaction testing
- Keyboard navigation testing

### 📱 Responsive & Visual Tests

✅ **Storybook stories** available

- 15 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 65 unit tests ensure comprehensive validation of the component:

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

### Input Types
- **should support all standard input types**: Should support all standard input types.

### Width Modifiers
- **should apply correct width classes**: Should apply correct width classes.
- **should not apply width class when width is empty**: Ensures component does not apply width class when width is empty

### Label Rendering
- **should render label when provided**: Verifies label renders correctly when provided
- **should not render label when empty**: Ensures component does not render label when empty
- **should show required indicator when required is true**: Should show required indicator when required is true.

### Hint Text
- **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
- **should have correct ID for ARIA association**: Should have correct ID for ARIA association.

### Error State
- **should render error message when provided**: Verifies error message renders correctly when provided
- **should apply error class to input**: Should apply error class to input.
- **should set aria-invalid when error exists**: Should set aria-invalid when error exists.
- **should not render error message when empty**: Ensures component does not render error message when empty

### Input Properties
- **should set basic input properties**: Should set basic input properties.
- **should set length constraints**: Should set length constraints.
- **should set autocomplete attribute**: Ensures autocomplete attribute is set properly on element

### ARIA Attributes
- **should associate input with hint via aria-describedby**: Should associate input with hint via aria-describedby.
- **should associate input with error via aria-describedby**: Should associate input with error via aria-describedby.
- **should associate input with both hint and error**: Should associate input with both hint and error.
- **should pass comprehensive accessibility tests (same as Storybook)**: Should pass comprehensive accessibility tests (same as Storybook).

### Event Handling
- **should update value property when input event occurs**: Tests value property updates and reflects changes
- **should update value property when change event occurs**: Tests value property updates and reflects changes
- **should dispatch custom events with proper detail**: Should dispatch custom events with proper detail.

### USWDS CSS Classes
- **should always have base usa-input class**: Should always have base usa-input class.
- **should have proper USWDS structure**: Should have proper USWDS structure.

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

### ID Generation
- **should use provided ID**: Should use provided ID.
- **should generate ID when not provided**: Should generate ID when not provided.

### USWDS HTML Structure Compliance
- **should maintain USWDS label structure**: Should maintain USWDS label structure.
- **should properly associate hint with input via aria-describedby**: Should properly associate hint with input via aria-describedby.
- **should properly associate error with input**: Should properly associate error with input.
- **should combine hint and error in aria-describedby**: Should combine hint and error in aria-describedby.
- **should show required indicator in label**: Should show required indicator in label.
- **should include screen reader text in error messages**: Should include screen reader text in error messages.

### Form Integration and Validation
- **should integrate with native form validation**: Should integrate with native form validation.
- **should handle form reset**: Should handle form reset.
- **should support HTML5 validation attributes**: Should support HTML5 validation attributes.

### Application Use Cases
- **should handle federal tax ID input (EIN)**: Should handle federal tax ID input (EIN).
- **should handle Social Security Number input**: Should handle Social Security Number input.
- **should handle federal employee ID input**: Should handle federal employee ID input.
- **should handle DUNS number input**: Should handle DUNS number input.
- **should handle government email addresses**: Should handle government email addresses.
- **should handle court case numbers**: Should handle court case numbers.
- **should handle federal grant numbers**: Should handle federal grant numbers.

### Accessibility and Section 508 Compliance
- **should maintain proper label association**: Should maintain proper label association.
- **should support screen readers with proper ARIA**: Should support screen readers with proper ARIA.
- **should announce errors to screen readers**: Should announce errors to screen readers.
- **should support keyboard navigation**: Should support keyboard navigation.
- **should handle disabled state accessibly**: Should handle disabled state accessibly.
- **should handle readonly state properly**: Should handle readonly state properly.

### Performance and Edge Cases
- **should handle rapid property changes efficiently**: Validates rapid property changes are handled correctly
- **should handle empty and null values gracefully**: Tests behavior with empty and null values gracefully values
- **should handle special characters in content**: Should handle special characters in content.
- **should maintain functionality after DOM manipulation**: Should maintain functionality after DOM manipulation.
- **should clean up event listeners properly**: Should clean up event listeners properly.

### Width Variants
- **should apply all width variant classes correctly**: Should apply all width variant classes correctly.
- **should remove width classes when width is cleared**: Should remove width classes when width is cleared.

### 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 not fire unintended events on property changes**: Should not fire unintended events on property changes.
- **should handle rapid property updates without breaking**: Should handle rapid property updates without breaking.

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

### Storybook Integration Tests (CRITICAL)
- **should render correctly when created via Storybook patterns**: Verifies correctly renders correctly when created via Storybook patterns
- **should handle Storybook controls updates without breaking**: Should handle Storybook controls updates without breaking.
- **should maintain visual state during hot reloads**: Should maintain visual state during hot reloads.


## 🚨 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._