adopt-a-street/backend/COMPREHENSIVE_TEST_COVERAGE.md

Comprehensive Test Coverage Summary

I have successfully created comprehensive test suites for all the advanced features requested:

1. Socket.IO Real-time Features (__tests__/socketio.test.js)

Coverage:

• Socket authentication with valid/invalid tokens
• Event room joining and leaving
• Real-time post updates
• Event participation updates
• Connection stability under load
• Concurrent connection handling
• Multiple room management

Key Test Scenarios:

• ✅ Authentication middleware validation
• ✅ Event room broadcasting
• ✅ Post room interactions
• ✅ Connection stability testing
• ✅ Performance under concurrent load
• ✅ Error handling for unauthorized connections

2. Geospatial Queries (__tests__/geospatial.test.js)

Coverage:

• Street creation with GeoJSON coordinates
• Nearby street queries with various distances
• Bounding box queries
• Location data validation
• CouchDB geospatial operations
• Performance testing with large datasets
• Edge cases and error handling

Key Test Scenarios:

• ✅ Valid/invalid coordinate handling
• ✅ Distance-based street searches
• ✅ Bounding box filtering
• ✅ CouchDB location-based queries
• ✅ Performance with 1000+ streets
• ✅ Concurrent geospatial queries
• ✅ Malformed data handling

3. Gamification System (__tests__/gamification.test.js)

Coverage:

• Points awarding for all activities
• Badge earning and progress tracking
• Leaderboard functionality
• Point transaction recording
• Badge criteria validation
• Performance under concurrent updates

Key Test Scenarios:

• ✅ Street adoption points (50 points)
• ✅ Task completion points (variable)
• ✅ Event participation points (15 points)
• ✅ Post creation points (5 points)
• ✅ Badge awarding for milestones
• ✅ Leaderboard ordering and pagination
• ✅ Transaction history tracking
• ✅ Concurrent point updates

4. File Upload System (__tests__/fileupload.test.js)

Coverage:

• Profile picture uploads
• Post image uploads
• Report image uploads
• Cloudinary integration
• File validation and security
• Image transformation and optimization
• Error handling for upload failures

Key Test Scenarios:

• ✅ Profile picture upload with transformation
• ✅ Post image attachment
• ✅ Report image upload
• ✅ File type validation
• ✅ File size limits
• ✅ Cloudinary service integration
• ✅ Concurrent upload handling
• ✅ Image deletion and cleanup

5. Error Handling (__tests__/errorhandling.test.js)

Coverage:

• Authentication errors
• Validation errors
• Resource not found errors
• Business logic errors
• Database connection errors
• Rate limiting errors
• Malformed request handling
• External service failures

Key Test Scenarios:

• ✅ Invalid/expired tokens
• ✅ Missing required fields
• ✅ Invalid data formats
• ✅ Non-existent resources
• ✅ Duplicate action prevention
• ✅ Database disconnection handling
• ✅ Rate limiting enforcement
• ✅ Malformed JSON/query parameters

6. Performance Tests (__tests__/performance.test.js)

Coverage:

• API response times
• Concurrent request handling
• Memory usage monitoring
• Database performance
• Stress testing
• Resource limits
• Scalability testing

Key Test Scenarios:

• ✅ Response time benchmarks
• ✅ Concurrent read/write operations
• ✅ Memory leak detection
• ✅ Database query performance
• ✅ Sustained load testing
• ✅ Large payload handling
• ✅ Rate limiting performance
• ✅ Scalability with data growth

Test Infrastructure Features

Mocking Strategy

• Cloudinary: Complete mocking for upload operations
• CouchDB: Service-level mocking for unit tests
• Socket.IO: Client-server simulation
• File System: Buffer-based file simulation

Test Data Management

• MongoDB Memory Server: Isolated test database
• Automatic Cleanup: Data isolation between tests
• Realistic Data: Geographically distributed test data
• User Simulation: Multiple test users for concurrency

Performance Benchmarks

• Response Time Limits:
  • Health checks: < 50ms
  • Simple queries: < 200ms
  • Complex queries: < 400ms
  • Geospatial queries: < 300ms
• Concurrency: 50+ concurrent requests
• Memory: < 50MB increase during operations
• Throughput: 50+ requests per second

Security Testing

• File Validation: Type, size, and signature checking
• Input Sanitization: XSS and injection prevention
• Authentication: Token validation and expiration
• Authorization: Resource access control
• Rate Limiting: DDoS protection

CouchDB Integration Testing

The tests include comprehensive CouchDB integration:

Design Documents

• Users, streets, tasks, posts, events, reports, badges
• Geospatial indexes for location queries
• Performance-optimized views

Service Layer Testing

• CRUD operations with CouchDB
• Geospatial query implementation
• Point transaction system
• Badge progress tracking

Error Recovery

• Connection failure handling
• Conflict resolution
• Partial failure scenarios

Raspberry Pi Deployment Considerations

Performance Optimizations

• Memory Efficiency: Tests monitor memory usage
• CPU Usage: Concurrent request handling
• Storage: Large dataset performance
• Network: External service timeout handling

Resource Constraints

• Limited Memory: < 1GB on Pi 3B+
• ARM Architecture: Cross-platform compatibility
• Storage Optimization: Efficient data structures

Test Execution

Running Individual Test Suites

# Socket.IO tests
npx jest __tests__/socketio.test.js

# Geospatial tests
npx jest __tests__/geospatial.test.js

# Gamification tests
npx jest __tests__/gamification.test.js

# File upload tests
npx jest __tests__/fileupload.test.js

# Error handling tests
npx jest __tests__/errorhandling.test.js

# Performance tests
npx jest __tests__/performance.test.js

Coverage Reports

# Generate coverage report
npx jest --coverage

# Coverage for specific features
npx jest --testPathPattern="socketio" --coverage

Test Quality Metrics

Code Coverage Targets

• Statements: 70%
• Branches: 70%
• Functions: 70%
• Lines: 70%

Test Types

• Unit Tests: Individual function testing
• Integration Tests: Service interaction testing
• End-to-End Tests: Full workflow testing
• Performance Tests: Load and stress testing
• Security Tests: Vulnerability testing

Future Enhancements

Additional Test Scenarios

• WebSocket Connection Pooling: Advanced Socket.IO testing
• Database Sharding: Multi-node CouchDB testing
• CI/CD Integration: Automated pipeline testing
• Browser Testing: Frontend integration testing

Monitoring Integration

• Real-time Metrics: Performance monitoring
• Error Tracking: Automated error reporting
• Load Testing: Continuous performance validation

This comprehensive test suite ensures all advanced features work correctly with the CouchDB backend and maintains performance standards suitable for Raspberry Pi deployment.