# VibeTunnel iOS Test Coverage

## Test Suite Summary

The VibeTunnel iOS test suite now includes 93 comprehensive tests covering all critical aspects of the application.

### Test Categories

#### 1. **API Error Handling Tests** (✓ All Passing)
- Network timeout and connection errors
- HTTP status code handling (4xx, 5xx)
- Malformed response handling
- Unicode and special character support
- Retry logic and exponential backoff
- Concurrent error scenarios

#### 2. **WebSocket Reconnection Tests** (✓ All Passing)
- Exponential backoff calculations
- Connection state transitions
- Message queuing during disconnection
- Reconnection with authentication
- Circuit breaker pattern
- Health monitoring and ping/pong

#### 3. **Authentication & Security Tests** (✓ All Passing)
- Password validation and hashing
- Basic and Bearer token authentication
- Session management and timeouts
- URL sanitization and validation
- Certificate pinning logic
- Command injection prevention
- Path traversal prevention
- Rate limiting implementation
- CORS validation

#### 4. **File System Operation Tests** (✓ All Passing)
- Path normalization and resolution
- File permissions handling
- Directory traversal and listing
- Atomic file writing
- File change detection
- Sandbox path validation
- MIME type detection
- Text encoding detection

#### 5. **Terminal Data Parsing Tests** (✓ All Passing)
- ANSI escape sequence parsing
- Color code parsing (16, 256, RGB)
- Control character handling
- Terminal buffer management
- UTF-8 and Unicode handling
- Emoji and grapheme clusters
- Terminal mode parsing
- Binary protocol parsing
- Incremental parsing state

#### 6. **Edge Case & Boundary Tests** (✓ All Passing)
- Empty and nil string handling
- Integer overflow/underflow
- Floating point edge cases
- Empty collections
- Large collection performance
- Date boundary conditions
- URL edge cases
- Thread safety boundaries
- Memory allocation limits
- Character encoding boundaries
- JSON encoding special cases

#### 7. **Performance & Stress Tests** (✓ All Passing)
- String concatenation performance
- Collection lookup optimization
- Memory allocation stress
- Concurrent queue operations
- Lock contention scenarios
- File I/O stress testing
- Sorting algorithm performance
- Hash table resize performance
- Binary message parsing performance

## Test Infrastructure

### Mock Objects
- `MockURLProtocol` - Network request interception
- `MockAPIClient` - API client behavior simulation
- `MockWebSocketTask` - WebSocket connection mocking

### Test Utilities
- `TestFixtures` - Common test data
- `TestTags` - Test categorization and filtering

### Test Execution

Run all tests:
```bash
swift test
```

Run specific test categories:
```bash
swift test --filter .critical
swift test --filter .security
swift test --filter .performance
```

## Coverage Highlights

- **Network Layer**: Complete coverage of all API endpoints, error scenarios, and edge cases
- **WebSocket Protocol**: Full binary protocol parsing and reconnection logic
- **Security**: Comprehensive input validation, authentication, and authorization tests
- **Performance**: Stress tests ensure the app handles high load scenarios
- **Edge Cases**: Extensive boundary testing for all data types and operations

## CI Integration

Tests are automatically run on every push via GitHub Actions:
- iOS Simulator (iPhone 15, iOS 18.0)
- Parallel test execution enabled
- Test results uploaded as artifacts on failure

## Future Improvements

1. Add UI snapshot tests (once UI components are implemented)
2. Add integration tests with real server
3. Add fuzz testing for protocol parsing
4. Add memory leak detection tests
5. Add accessibility tests