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n8n-mcp/docs/testing-checklist.md
czlonkowski 1d464e29e5 test: add Phase 4 database integration tests (partial) 
- Add comprehensive test utilities for database testing
- Implement connection management tests for in-memory and file databases
- Add transaction tests including nested transactions and savepoints
- Test database lifecycle, error handling, and performance
- Include tests for WAL mode, connection pooling, and constraints

Part of Phase 4: Integration Testing
2025-07-29 09:36:14 +02:00

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# n8n-MCP Testing Implementation Checklist
## Immediate Actions (Day 1)
- [x] ~~Fix failing tests (Phase 0)~~ ✅ COMPLETED
- [x] ~~Create GitHub Actions workflow file~~ ✅ COMPLETED
- [x] ~~Install Vitest and remove Jest~~ ✅ COMPLETED
- [x] ~~Create vitest.config.ts~~ ✅ COMPLETED
- [x] ~~Setup global test configuration~~ ✅ COMPLETED
- [x] ~~Migrate existing tests to Vitest syntax~~ ✅ COMPLETED
- [x] ~~Setup coverage reporting with Codecov~~ ✅ COMPLETED
## Phase 1: Vitest Migration ✅ COMPLETED
All tests have been successfully migrated from Jest to Vitest:
- ✅ Removed Jest and installed Vitest
- ✅ Created vitest.config.ts with path aliases
- ✅ Set up global test configuration
- ✅ Migrated all 6 test files (68 tests passing)
- ✅ Updated TypeScript configuration
- ✅ Cleaned up Jest configuration files
## Week 1: Foundation
### Testing Infrastructure ✅ COMPLETED (Phase 2)
- [x] ~~Create test directory structure~~ ✅ COMPLETED
- [x] ~~Setup mock infrastructure for better-sqlite3~~ ✅ COMPLETED
- [x] ~~Create mock for n8n-nodes-base package~~ ✅ COMPLETED
- [x] ~~Setup test database utilities~~ ✅ COMPLETED
- [x] ~~Create factory pattern for nodes~~ ✅ COMPLETED
- [x] ~~Create builder pattern for workflows~~ ✅ COMPLETED
- [x] ~~Setup global test utilities~~ ✅ COMPLETED
- [x] ~~Configure test environment variables~~ ✅ COMPLETED
### CI/CD Pipeline ✅ COMPLETED (Phase 3.8)
- [x] ~~GitHub Actions for test execution~~ ✅ COMPLETED & VERIFIED
- Successfully running with Vitest
- 1021 tests passing in CI
- Build time: ~2 minutes
- [x] ~~Coverage reporting integration~~ ✅ COMPLETED (Codecov setup)
- [x] ~~Performance benchmark tracking~~ ✅ COMPLETED
- [x] ~~Test result artifacts~~ ✅ COMPLETED
- [ ] Branch protection rules
- [ ] Required status checks
## Week 2: Mock Infrastructure
### Database Mocking
- [ ] Complete better-sqlite3 mock implementation
- [ ] Mock prepared statements
- [ ] Mock transactions
- [ ] Mock FTS5 search functionality
- [ ] Test data seeding utilities
### External Dependencies
- [ ] Mock axios for API calls
- [ ] Mock file system operations
- [ ] Mock MCP SDK
- [ ] Mock Express server
- [ ] Mock WebSocket connections
## Week 3-4: Unit Tests ✅ COMPLETED (Phase 3)
### Core Services (Priority 1) ✅ COMPLETED
- [x] ~~`config-validator.ts` - 95% coverage~~ ✅ 96.9%
- [x] ~~`enhanced-config-validator.ts` - 95% coverage~~ ✅ 94.55%
- [x] ~~`workflow-validator.ts` - 90% coverage~~ ✅ 97.59%
- [x] ~~`expression-validator.ts` - 90% coverage~~ ✅ 97.22%
- [x] ~~`property-filter.ts` - 90% coverage~~ ✅ 95.25%
- [x] ~~`example-generator.ts` - 85% coverage~~ ✅ 94.34%
### Parsers (Priority 2) ✅ COMPLETED
- [x] ~~`node-parser.ts` - 90% coverage~~ ✅ 97.42%
- [x] ~~`property-extractor.ts` - 90% coverage~~ ✅ 95.49%
### MCP Layer (Priority 3) ✅ COMPLETED
- [x] ~~`tools.ts` - 90% coverage~~ ✅ 94.11%
- [x] ~~`handlers-n8n-manager.ts` - 85% coverage~~ ✅ 92.71%
- [x] ~~`handlers-workflow-diff.ts` - 85% coverage~~ ✅ 96.34%
- [x] ~~`tools-documentation.ts` - 80% coverage~~ ✅ 94.12%
### Database Layer (Priority 4) ✅ COMPLETED
- [x] ~~`node-repository.ts` - 85% coverage~~ ✅ 91.48%
- [x] ~~`database-adapter.ts` - 85% coverage~~ ✅ 89.29%
- [x] ~~`template-repository.ts` - 80% coverage~~ ✅ 86.78%
### Loaders and Mappers (Priority 5) ✅ COMPLETED
- [x] ~~`node-loader.ts` - 85% coverage~~ ✅ 91.89%
- [x] ~~`docs-mapper.ts` - 80% coverage~~ ✅ 95.45%
### Additional Critical Services Tested ✅ COMPLETED (Phase 3.5)
- [x] ~~`n8n-api-client.ts`~~ ✅ 83.87%
- [x] ~~`workflow-diff-engine.ts`~~ ✅ 90.06%
- [x] ~~`n8n-validation.ts`~~ ✅ 97.14%
- [x] ~~`node-specific-validators.ts`~~ ✅ 98.7%
## Week 5-6: Integration Tests
### MCP Protocol Tests
- [ ] Full MCP server initialization
- [ ] Tool invocation flow
- [ ] Error handling and recovery
- [ ] Concurrent request handling
- [ ] Session management
### n8n API Integration
- [ ] Workflow CRUD operations
- [ ] Webhook triggering
- [ ] Execution monitoring
- [ ] Authentication handling
- [ ] Error scenarios
### Database Integration
- [ ] SQLite operations with real DB
- [ ] FTS5 search functionality
- [ ] Transaction handling
- [ ] Migration testing
- [ ] Performance under load
## Week 7-8: E2E & Performance
### End-to-End Scenarios
- [ ] Complete workflow creation flow
- [ ] AI agent workflow setup
- [ ] Template import and validation
- [ ] Workflow execution monitoring
- [ ] Error recovery scenarios
### Performance Benchmarks
- [ ] Node loading speed (< 50ms per node)
- [ ] Search performance (< 100ms for 1000 nodes)
- [ ] Validation speed (< 10ms simple, < 100ms complex)
- [ ] Database query performance
- [ ] Memory usage profiling
- [ ] Concurrent request handling
### Load Testing
- [ ] 100 concurrent MCP requests
- [ ] 10,000 nodes in database
- [ ] 1,000 workflow validations/minute
- [ ] Memory leak detection
- [ ] Resource cleanup verification
## Testing Quality Gates
### Coverage Requirements
- [ ] Overall: 80%+ (Currently: 62.67%)
- [x] ~~Core services: 90%+~~ ✅ COMPLETED
- [x] ~~MCP tools: 90%+~~ ✅ COMPLETED
- [x] ~~Critical paths: 95%+~~ ✅ COMPLETED
- [x] ~~New code: 90%+~~ ✅ COMPLETED
### Performance Requirements
- [x] ~~All unit tests < 10ms~~ ✅ COMPLETED
- [ ] Integration tests < 1s
- [ ] E2E tests < 10s
- [x] ~~Full suite < 5 minutes~~ ✅ COMPLETED (~2 minutes)
- [x] ~~No memory leaks~~ ✅ COMPLETED
### Code Quality
- [x] ~~No ESLint errors~~ ✅ COMPLETED
- [x] ~~No TypeScript errors~~ ✅ COMPLETED
- [x] ~~No console.log in tests~~ ✅ COMPLETED
- [x] ~~All tests have descriptions~~ ✅ COMPLETED
- [x] ~~No hardcoded values~~ ✅ COMPLETED
## Monitoring & Maintenance
### Daily
- [ ] Check CI pipeline status
- [ ] Review failed tests
- [ ] Monitor flaky tests
### Weekly
- [ ] Review coverage reports
- [ ] Update test documentation
- [ ] Performance benchmark review
- [ ] Team sync on testing progress
### Monthly
- [ ] Update baseline benchmarks
- [ ] Review and refactor tests
- [ ] Update testing strategy
- [ ] Training/knowledge sharing
## Risk Mitigation
### Technical Risks
- [ ] Mock complexity - Use simple, maintainable mocks
- [ ] Test brittleness - Focus on behavior, not implementation
- [ ] Performance impact - Run heavy tests in parallel
- [ ] Flaky tests - Proper async handling and isolation
### Process Risks
- [ ] Slow adoption - Provide training and examples
- [ ] Coverage gaming - Review test quality, not just numbers
- [ ] Maintenance burden - Automate what's possible
- [ ] Integration complexity - Use test containers
## Success Criteria
### Technical Metrics
- Coverage: 80%+ overall (62.67% - needs improvement), 90%+ critical paths ✅
- Performance: All benchmarks within limits ✅
- Reliability: Zero flaky tests ✅ (1 skipped)
- Speed: CI pipeline < 5 minutes ✅ (~2 minutes)
### Team Metrics
- All developers writing tests ✅
- Tests reviewed in PRs ✅
- No production bugs from tested code
- Improved development velocity ✅
## Phases Completed
- **Phase 0**: Immediate Fixes ✅ COMPLETED
- **Phase 1**: Vitest Migration ✅ COMPLETED
- **Phase 2**: Test Infrastructure ✅ COMPLETED
- **Phase 3**: Unit Tests (All 943 tests) ✅ COMPLETED
- **Phase 3.5**: Critical Service Testing ✅ COMPLETED
- **Phase 3.8**: CI/CD & Infrastructure ✅ COMPLETED
- **Phase 4**: Integration Tests 🔄 PENDING (Next Phase)
- **Phase 5**: E2E Tests 🔄 PENDING
## Resources & Tools
### Documentation
- Vitest: https://vitest.dev/
- Testing Library: https://testing-library.com/
- MSW: https://mswjs.io/
- Testcontainers: https://www.testcontainers.com/
### Monitoring
- Codecov: https://codecov.io/
- GitHub Actions: https://github.com/features/actions
- Benchmark Action: https://github.com/benchmark-action/github-action-benchmark
### Team Resources
- Testing best practices guide
- Example test implementations
- Mock usage patterns
- Performance optimization tips
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