## Jest Configuration & Setup:
- Configure Jest with jsdom environment for DOM testing
- Set up test mocks for external dependencies (marked, hljs)
- Create test setup with localStorage, fetch, and dialog element mocks
- Add npm scripts for testing: test, test:watch, test:coverage, test:modals
- Update Makefile with Jest test targets and CI integration
## TTS Modal Tests (89 test cases):
- Modal creation, display, and structure validation
- Voice selection dropdown with 6+ voice options
- Speed control slider (0.5x-2.0x range)
- Audio generation with API integration testing
- Download functionality with blob handling
- Modal closing and cleanup
- Accessibility (ARIA, keyboard navigation, focus management)
- Error handling (API failures, malformed responses, network issues)
## Translate Modal Tests (85 test cases):
- Modal creation with source/target language selection
- Language detection and auto-population
- Translation API integration with streaming responses
- Copy functionality with clipboard API
- Text editing and retranslation
- Language swap functionality
- Modal state management
- Accessibility compliance
- Comprehensive error handling
## Embed Modal Tests (78 test cases):
- Main chat modal with conversation management
- Model loading and selection from endpoints
- Conversation history persistence with localStorage
- Real-time chat with streaming AI responses
- Message actions (copy, delete, TTS buttons)
- Action buttons with fallback modal opening
- Toggle functionality and state management
- User input handling (Enter key, send button)
- Accessibility and keyboard navigation
- Error handling for chat API, storage, and network issues
## Total: 252 comprehensive test cases covering:
- UI component creation and rendering
- User interaction and event handling
- API integration and streaming responses
- State management and persistence
- Accessibility compliance
- Error boundary testing
- Modal lifecycle management
- Cross-browser compatibility patterns
All tests include proper mocking, async handling, and cleanup for reliable CI execution.
