Designing Tests

When to Load

• Trigger: Adding tests, test strategy planning, improving coverage, setting up testing infrastructure
• Skip: Non-test code changes where testing is not part of the task

Test Implementation Workflow

Copy this checklist and track progress:

Test Implementation Progress:
- [ ] Step 1: Identify what to test
- [ ] Step 2: Select appropriate test type
- [ ] Step 3: Write tests following templates
- [ ] Step 4: Run tests and verify passing
- [ ] Step 5: Check coverage meets targets
- [ ] Step 6: Fix any failing tests

Testing Pyramid

Apply the testing pyramid for balanced coverage:

        /\
       /  \     E2E Tests (10%)
      /----\    - Critical user journeys
     /      \   - Slow but comprehensive
    /--------\  Integration Tests (20%)
   /          \ - Component interactions
  /------------\ - API contracts
 /              \ Unit Tests (70%)
/________________\ - Fast, isolated
                   - Business logic focus

Framework Selection

JavaScript/TypeScript

Type	Recommended	Alternative
Unit	Vitest	Jest
Integration	Vitest + MSW	Jest + SuperTest
E2E	Playwright	Cypress
Component	Testing Library	Vitest Browser Mode

Python

Type	Recommended	Alternative
Unit	pytest	unittest
Integration	pytest + httpx	pytest + requests
E2E	Playwright	Selenium
API	pytest + FastAPI TestClient	-

Go

Type	Recommended
Unit	testing + testify
Integration	testing + httptest
E2E	testing + chromedp