# CCR Unit Tests Implementation Plan

## Context
为CCR (Claude Code Router) 功能添加完整的单元测试覆盖

## Test Coverage Goals
- Target: 90% coverage for all CCR modules
- Strategy: Core tests + Edge tests for each module

## Implementation Steps

### Phase 1: Test Structure Setup
- Create test directories: `tests/commands/` and `tests/utils/ccr/`
- Setup test helpers and fixtures

### Phase 2: Command Tests
- `tests/commands/ccr.test.ts` - Core command functionality
- `tests/commands/ccr.edge.test.ts` - Edge cases and error handling

### Phase 3: Installer Tests  
- `tests/utils/ccr/installer.test.ts` - Installation logic
- `tests/utils/ccr/installer.edge.test.ts` - Installation edge cases

### Phase 4: Configuration Tests
- `tests/utils/ccr/config.test.ts` - Configuration management
- `tests/utils/ccr/config.edge.test.ts` - Configuration edge cases

### Phase 5: Presets Tests
- `tests/utils/ccr/presets.test.ts` - Preset fetching and fallback
- `tests/utils/ccr/presets.edge.test.ts` - Network and error handling

## Test Coverage Areas

### CCR Command
- Installation flow
- Configuration flow
- Error handling
- Internationalization

### Installer Module
- CCR detection (isCcrInstalled)
- Version retrieval (getCcrVersion)
- Installation process (installCcr)
- Service startup (startCcrService)

### Configuration Module
- Directory creation
- Config read/write
- Proxy configuration
- Preset selection
- User interaction flows

### Presets Module
- Online preset fetching
- Fallback presets
- Data transformation
- Error recovery

## Expected Deliverables
- 8 test files with comprehensive coverage
- Test coverage ≥ 90%
- All tests passing in CI/CD pipeline