This document tracks all testing coverage for this component to ensure comprehensive validation and accessibility compliance. **Last Updated**: 2025-10-19 **Test Coverage**: 60% **Accessibility Score**: WCAG AA Compliant โœ… ## ๐Ÿงช Test Summary ### Unit Tests (Vitest) โœ… **59 unit tests** implemented - Component rendering, properties, events, and methods tested ### โ™ฟ Accessibility Tests โœ… **ARIA attributes and roles tested** โœ… **Keyboard navigation tested** โœ… **Accessibility documented in Storybook** ### ๐Ÿ–ฑ๏ธ Interactive Tests (Cypress) โš ๏ธ **Interactive tests needed** - User interactions (click, focus, keyboard) - Form integration testing - State transition validation ### ๐Ÿ“ฑ Responsive & Visual Tests โœ… **Storybook stories** available - 5 visual test scenarios ### ๐Ÿ”ง E2E Integration Tests โš ๏ธ **E2E tests recommended** for complex workflows ## ๐Ÿ“Š Detailed Accessibility Compliance ### WCAG 2.1 AA Requirements โœ… **ARIA Implementation**: Roles, labels, and descriptions properly set โœ… **Keyboard Navigation**: Tab order and keyboard interactions tested โš ๏ธ **Focus Management**: Focus behavior needs validation โš ๏ธ **Automated Testing**: Recommend axe-core integration for comprehensive a11y testing ### Screen Reader Compatibility - โš ๏ธ **Manual testing needed** with VoiceOver, NVDA, and JAWS - Component should announce purpose, state, and interactions clearly - Content should be logically structured for screen readers ## ๐Ÿ“‹ Detailed Unit Test Coverage The following 55 unit tests ensure comprehensive validation of the component: ### Component Initialization - **should create language selector element**: Should create language selector element. - **should have default properties**: Should have default properties. - **should render light DOM for USWDS compatibility**: Should render light DOM for USWDS compatibility. - **should render default two-language variant**: Should render default two-language variant. ### USWDS HTML Structure and Classes - **should have proper USWDS classes for two-language variant**: Should have proper USWDS classes for two-language variant. - **should apply small variant classes correctly**: Should apply small variant classes correctly. - **should render proper dropdown structure**: Should render proper dropdown structure. - **should render unstyled variant correctly**: Should render unstyled variant correctly. ### Language Selection - **should handle language selection in two-language mode**: Should handle language selection in two-language mode. - **should handle language selection in dropdown mode**: Should handle language selection in dropdown mode. - **should dispatch custom events with correct details**: Should dispatch custom events with correct details. - **should navigate to href when provided**: Should navigate to href when provided. ### Dropdown Functionality - **should toggle dropdown open/closed**: Should toggle dropdown open/closed. - **should update aria-expanded attribute**: Should update aria-expanded attribute. - **should show/hide submenu based on state**: Should show/hide submenu based on state. - **should close dropdown when language is selected**: Should close dropdown when language is selected. ### Language Management - **should add new languages**: Should add new languages. - **should not add duplicate languages**: Should not add duplicate languages. - **should remove languages**: Should remove languages. - **should update current language when removed language was current**: Should update current language when removed language was current. - **should get current language object**: Should get current language object. - **should set current language by code**: Should set current language by code. ### Public API Methods - **should provide dropdown control methods**: Should provide dropdown control methods. - **should only affect dropdown in dropdown variant**: Should only affect dropdown in dropdown variant. ### Variant Auto-Detection - **should automatically switch to dropdown for multiple languages**: Should automatically switch to dropdown for multiple languages. - **should respect explicit dropdown variant setting**: Should respect explicit dropdown variant setting. ### Accessibility Features - **should have proper lang attributes**: Should have proper lang attributes. - **should mark current language with usa-current class**: Should mark current language with usa-current class. - **should have proper ARIA controls in dropdown**: Should have proper ARIA controls in dropdown. - **should prevent default on link clicks**: Should prevent default on link clicks. ### Application Use Cases - **should handle federal website language requirements**: Should handle federal website language requirements. - **should support emergency multilingual notifications**: Should support emergency multilingual notifications. - **should handle immigration services multilingual patterns**: Should handle immigration services multilingual patterns. ### Edge Cases and Error Handling - **should handle empty language array gracefully**: Tests behavior with empty language array gracefully values - **should handle invalid current language code**: Validates handling of invalid current language code input - **should handle setCurrentLanguage with invalid code**: Should handle setCurrentLanguage with invalid code. - **should handle rapid dropdown toggles**: Should handle rapid dropdown toggles. - **should maintain functionality after DOM manipulation**: Should maintain functionality after DOM manipulation. ### Performance and Memory - **should handle large language lists efficiently**: Should handle large language lists efficiently. - **should clean up event listeners properly**: Should clean up event listeners properly. ### CRITICAL: Component Lifecycle Stability - **should remain in DOM after property changes**: Should remain in DOM after property changes. - **should maintain element stability during multiple language updates**: Should maintain element stability during multiple language updates. - **should preserve DOM connection through variant changes**: Should preserve DOM connection through variant changes. ### CRITICAL: Event System Stability - **should not pollute global event handling**: Should not pollute global event handling. - **should maintain event stability across dropdown operations**: Should maintain event stability across dropdown operations. - **should maintain stability during rapid language selections**: Should maintain stability during rapid language selections. ### CRITICAL: Dropdown State Management Stability - **should maintain DOM connection during dropdown state changes**: Should maintain DOM connection during dropdown state changes. - **should preserve element stability during interactive dropdown usage**: Should preserve element stability during interactive dropdown usage. - **should maintain stability during complex dropdown interactions**: Should maintain stability during complex dropdown interactions. ### 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. ### 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 language selection**: Should maintain accessibility during language selection. - **should be accessible in navigation contexts**: Ensures component meets accessibility standards and guidelines ## ๐Ÿšจ Testing Gaps & Recommendations ### โš ๏ธ Coverage Below 70% Current coverage is 60%. Consider adding: - Interactive testing with Cypress ## ๐Ÿ“ 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._