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

**Last Updated**: 2025-10-22  
**Test Coverage**: 60%  
**Accessibility Score**: WCAG AA Compliant ✅

## 🧪 Test Summary

### Unit Tests (Vitest)

✅ **71 unit tests** implemented

- Component rendering, properties, events, and methods tested

### ♿ Accessibility Tests

✅ **ARIA attributes and roles 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

- 15 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**: Needs keyboard accessibility testing
✅ **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 67 unit tests ensure comprehensive validation of the component:

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

### Basic Rendering
- **should render a table element**: Should render a table element.
- **should render empty table with no data message**: Should render empty table with no data message.
- **should render caption when provided**: Verifies caption renders correctly when provided
- **should render default caption when not provided**: Verifies default caption renders correctly when not provided

### Column and Data Rendering
- **should render table headers**: Should render table headers.
- **should render table data**: Should render table data.
- **should use first column as row header**: Should use first column as row header.
- **should add data-label attributes for responsive stacking**: Should add data-label attributes for responsive stacking.

### Table Variants and Classes
- **should apply striped class when striped is true**: Should apply striped class when striped is true.
- **should apply borderless class when borderless is true**: Should apply borderless class when borderless is true.
- **should apply compact class when compact is true**: Should apply compact class when compact is true.
- **should apply stacked class when stacked is true**: Should apply stacked class when stacked is true.
- **should apply stacked-header class when stackedHeader is true**: Should apply stacked-header class when stackedHeader is true.
- **should apply sticky-header class when stickyHeader is true**: Should apply sticky-header class when stickyHeader is true.
- **should apply multiple classes when multiple variants are true**: Should apply multiple classes when multiple variants are true.

### Scrollable Table
- **should wrap table in scrollable container when scrollable is true**: Should wrap table in scrollable container when scrollable is true.
- **should not wrap table when scrollable is false**: Ensures component does not wrap table when scrollable is false

### Sorting Functionality
- **should render sortable headers as clickable elements**: Should render sortable headers as clickable elements.
- **should set appropriate ARIA attributes for sortable columns**: Ensures appropriate ARIA attribute is set properly on element
- **should handle sort click and dispatch event**: Tests sort click and dispatch event handling and response
- **should toggle sort direction on repeated clicks**: Should toggle sort direction on repeated clicks.
- **should update ARIA attributes after sorting**: Should update ARIA attributes after sorting.
- **should sort text data correctly**: Should sort text data correctly.
- **should sort numeric data correctly**: Should sort numeric data correctly.

### Data Type Formatting
- **should format percentage values**: Should format percentage values.
- **should format date values from string**: Should format date values from string.
- **should format date values from Date object**: Should format date values from Date object.
- **should handle number formatting**: Should handle number formatting.

### Sticky Header
- **should apply sticky header class when stickyHeader is enabled**: Should apply sticky header class when stickyHeader is enabled.

### Screen Reader Announcements
- **should have announcement region for sort feedback**: Should have announcement region for sort feedback.
- **should announce sort changes**: Should announce sort changes.
- **should clear announcement when no sort is applied**: Should clear announcement when no sort is applied.

### Accessibility Features
- **should have proper table roles**: Should have proper table roles.
- **should have accessible sortable headers**: Should have accessible sortable headers.
- **should provide proper scope attributes**: Should provide proper scope attributes.

### Edge Cases and Error Handling
- **should handle empty columns array**: Tests behavior with empty columns array values
- **should handle mismatched data and columns**: Should handle mismatched data and columns.
- **should handle sort on non-sortable column gracefully**: Should handle sort on non-sortable column gracefully.
- **should handle invalid date values**: Validates handling of invalid date values input
- **should handle invalid numeric values**: Validates handling of invalid numeric values input

### Comprehensive Slotted Content Validation
- **should render custom empty state content**: Should render custom empty state content.
- **should render complex empty state with actions**: Should render complex empty state with actions.
- **should render additional table content via default slot**: Should render additional table content via default slot.
- **should support caption via default slot**: Should support caption via default slot.
- **should handle multiple slotted elements together**: Should handle multiple slotted elements together.
- **should maintain slotted content when data changes**: Should maintain slotted content when data changes.
- **should not show empty slot when data exists**: Ensures component does not show empty slot when data exists
- **should support complex footer with totals and summaries**: Should support complex footer with totals and summaries.

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

### Property Updates and Re-rendering
- **should re-render when data changes**: Should re-render when data changes.
- **should re-render when columns change**: Should re-render when columns change.
- **should re-render when table variant properties change**: Should re-render when table variant properties change.

### Performance Considerations
- **should handle large datasets efficiently**: Should handle large datasets efficiently.

### 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 table operations without disconnection**: Should handle complex table 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 sorting operations without component removal**: Should handle rapid sorting operations without component removal.
- **should handle event pollution without component removal**: Should handle event pollution without component removal.

### Data Rendering Stability (CRITICAL)
- **should handle large dataset changes without disconnection**: Should handle large dataset changes without disconnection.
- **should handle complex column structure changes**: Should handle complex column structure changes.

### Accessibility Compliance (CRITICAL)
- **should pass comprehensive accessibility tests (same as Storybook)**: Should pass comprehensive accessibility tests (same as Storybook).
- **should pass accessibility tests with sorting enabled**: Should pass accessibility tests with sorting enabled.
- **should pass accessibility tests with scrollable variant**: Should pass accessibility tests with scrollable variant.

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

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


## 🚨 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

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