tomevault-io Testing Skills
Overview
Comprehensive testing knowledge for building reliable, maintainable software with confidence in deployments.
Categories
Fundamentals
- Testing Pyramid
- Test-Driven Development (TDD)
- Behavior-Driven Development (BDD)
- Core Testing Principles
Unit Testing
- Test isolation and independence
- Mocking and stubbing strategies
- Test doubles (mocks, stubs, spies, fakes)
- Effective assertions
Integration Testing
- Database integration tests
- API endpoint testing
- External service testing
- Container-based testing
End-to-End Testing
- Browser automation
- Mobile app testing
- Visual regression testing
- Cross-browser testing
Test Patterns
- Arrange-Act-Assert (AAA)
- Given-When-Then
- Test fixtures and factories
- Page Object Model
Advanced Testing
- Property-based testing
- Mutation testing
- Contract testing
- Chaos engineering
Test Pyramid
╱╲
╱ ╲ E2E Tests
╱────╲ (Few, Slow, Expensive)
╱ ╲
╱────────╲ Integration Tests
╱ ╲ (Medium)
╱────────────╲
╱ ╲ Unit Tests
╱________________╲ (Many, Fast, Cheap)
Quick Reference
| Test Type | Speed | Scope | Confidence | Cost |
|---|---|---|---|---|
| Unit | Fast (ms) | Single unit | Low-Medium | Low |
| Integration | Medium (s) | Multiple units | Medium-High | Medium |
| E2E | Slow (min) | Full system | High | High |
When to Use Each Type
Unit Tests
- Business logic validation
- Algorithm correctness
- Edge case handling
- Pure functions
Integration Tests
- Database operations
- API endpoints
- Service interactions
- Message queues
E2E Tests
- Critical user journeys
- Payment flows
- Authentication
- Cross-service workflows
Directory Structure
skills/testing/
├── _index.md
├── fundamentals/
│ ├── testing-pyramid.md
│ ├── test-driven-development.md
│ ├── behavior-driven-development.md
│ └── testing-principles.md
├── unit-testing/
│ ├── unit-test-basics.md
│ ├── mocking-strategies.md
│ ├── test-doubles.md
│ └── assertion-patterns.md
├── integration-testing/
│ ├── integration-test-basics.md
│ ├── database-testing.md
│ ├── api-testing.md
│ └── external-service-testing.md
├── e2e-testing/
│ ├── e2e-basics.md
│ ├── browser-testing.md
│ ├── mobile-testing.md
│ └── visual-regression.md
├── patterns/
│ ├── arrange-act-assert.md
│ ├── given-when-then.md
│ ├── test-fixtures.md
│ ├── factory-patterns.md
│ └── page-object-model.md
├── advanced/
│ ├── property-based-testing.md
│ ├── mutation-testing.md
│ ├── contract-testing.md
│ └── chaos-testing.md
└── ci-cd/
├── test-automation.md
├── coverage-reporting.md
└── flaky-tests.md
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