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turash/concept/16_testing_strategy.md
Damir Mukimov 4a2fda96cd
Initial commit: Repository setup with .gitignore, golangci-lint v2.6.0, and code quality checks 
- Initialize git repository
- Add comprehensive .gitignore for Go projects
- Install golangci-lint v2.6.0 (latest v2) globally
- Configure .golangci.yml with appropriate linters and formatters
- Fix all formatting issues (gofmt)
- Fix all errcheck issues (unchecked errors)
- Adjust complexity threshold for validation functions
- All checks passing: build, test, vet, lint
2025-11-01 07:36:22 +01:00

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14. Testing Strategy

Recommendation: Comprehensive testing pyramid.

Testing Layers

  1. Unit Tests (70% coverage target):

    • Business logic functions (100% coverage)
    • Matching algorithms (95% coverage, focus on edge cases)
    • Economic calculations (100% coverage, ±€0.01 accuracy)
    • Data validation (100% coverage, all error paths)

  2. Integration Tests (20% of test suite):

    • API endpoints (200+ test cases, all CRUD operations)
    • Database operations (Neo4j + PostgreSQL integration)
    • Event processing (Watermill pubsub reliability)
    • Service integrations (external APIs, IoT devices)

  3. E2E Tests (10% of test suite):

    • Critical user flows (match discovery → connection → implementation)
    • Match discovery and connection flow (85% success rate target)
    • Payment processing (Stripe integration, transaction success rate >99.5%)
    • Cross-browser compatibility (Chrome, Firefox, Safari, Edge)

Testing Tools

  • Backend:
    • Built-in testing package (Go 1.25 improvements)
    • github.com/stretchr/testify: Assertions, suites, mocks
    • github.com/golang/mock or github.com/vektra/mockery/v2: Mocking
  • API Testing:
    • net/http/httptest: Built-in HTTP testing
    • github.com/go-resty/resty/v2: For integration tests
  • E2E: Playwright or Cypress
  • Graph Database Testing:
    • Testcontainers: github.com/testcontainers/testcontainers-go
    • Neo4j test container setup
  • Load Testing:
    • k6 (Go-based, recommended)
    • github.com/tsenart/vegeta: HTTP load testing library
  • Benchmarking: Built-in go test -bench

Test Data Strategy

  • Fixtures: Realistic test data generators
  • Test Database: Isolated test environment
  • Snapshots: Graph database snapshots for integration tests
  • Mocking: External APIs (government registries, payment providers)