cherry-studio/src/main/data/__tests__

Main Process Preference System Tests

This directory contains unit tests for the main process PreferenceService.

Test Files

PreferenceService.simple.test.ts

Basic functionality tests for the main process PreferenceService:

• Singleton Pattern: Verifies proper singleton implementation
• Initialization: Tests database connection and cache loading
• Basic Operations: Tests get/set operations with defaults
• Bulk Operations: Tests getMultiple functionality
• Method Signatures: Verifies all required methods exist
• Type Safety: Ensures proper TypeScript integration

Architecture Coverage

✅ Main PreferenceService

• SQLite database integration with Drizzle ORM
• Memory caching with PreferenceDefaultScopeType
• Multi-window subscription management
• Batch operations and transactions
• IPC notification broadcasting
• Automatic cleanup and error handling

Test Statistics

• Total Test Files: 1
• Total Tests: 7
• Coverage Areas:
  • Core functionality
  • Database integration
  • Type safety
  • Method existence
  • Error resilience

Testing Challenges & Solutions

Database Mocking

The main process PreferenceService heavily integrates with:

• Drizzle ORM
• SQLite database
• Electron BrowserWindow API

For comprehensive testing, these dependencies are mocked to focus on service logic rather than integration testing.

Mock Strategy

• Electron APIs: Mocked BrowserWindow for window management
• Database Layer: Mocked DbService and database queries
• Logger: Mocked logging to avoid setup complexity

Running Tests

# Run main process tests
yarn vitest run src/main/data/__tests__/

# Run specific test
yarn vitest run src/main/data/__tests__/PreferenceService.simple.test.ts

# Watch mode
yarn vitest watch src/main/data/__tests__/

Future Test Enhancements

For more comprehensive testing, consider:

1. Integration Tests: Test actual database operations
2. IPC Tests: Test cross-process communication
3. Performance Tests: Measure cache performance vs database queries
4. Subscription Tests: Test multi-window notification broadcasting
5. Migration Tests: Test data migration scenarios

Key Testing Patterns

Service Lifecycle

• Singleton instance management
• Initialization state handling
• Default value provision

Error Resilience

• Database failure scenarios
• Invalid data handling
• Graceful degradation