| name | testing |
| description | Use when running tests, analyzing coverage, writing test cases, or hunting for bugs. Provides testing strategies and bug report formats. |
| version | 1.0.0 |
Testing Skill
Comprehensive knowledge for QA and testing. Use these strategies and reference detailed guides for specific test types.
Testing Pyramid
/\
/ \ E2E Tests (few)
/----\ - Critical user flows
/ \ - Slow, expensive
/--------\ Integration Tests (some)
/ \ - Component interactions
/------------\- API contracts
/ \ Unit Tests (many)
/----------------\- Fast, isolated, cheap
Test Case Categories
Happy Path
- Does it work with valid input?
- Does the main flow complete successfully?
Edge Cases
- Empty input, null, undefined
- Boundary values (0, -1, MAX_INT)
- Single item vs many items
- First and last items
Error States
- Invalid input
- Network failures
- Timeout scenarios
- Missing permissions
Security Cases
- Unauthorized access attempts
- Malformed input (injection attempts)
- Rate limiting behavior
Coverage Analysis
What to Measure
- Line coverage - Which lines executed?
- Branch coverage - Which if/else paths taken?
- Function coverage - Which functions called?
Coverage Targets
| Type | Target | Notes |
|---|
| Critical paths | 100% | Auth, payments, data mutations |
| Business logic | 80%+ | Core features |
| Utilities | 70%+ | Helpers, formatters |
| UI components | 60%+ | Interaction handlers |
Coverage Isn't Everything
- High coverage with bad tests = false confidence
- Test behavior, not implementation
- Critical paths matter more than percentage
Bug Report Format
## Bug: [Clear title describing the issue]
**Severity:** Critical / High / Medium / Low
**Environment:**
- Browser/OS: Chrome 120 / macOS 14
- App version: 1.2.3
- User role: Admin
**Steps to Reproduce:**
1. Go to /settings
2. Click "Change Password"
3. Enter password shorter than 8 characters
4. Click "Save"
**Expected Result:**
Error message "Password must be at least 8 characters"
**Actual Result:**
Form submits successfully, password unchanged, no error shown
**Evidence:**
- Screenshot: [link]
- Console errors: None
- Network: POST /api/password returned 200
**Additional Context:**
Works correctly when password is 8+ characters.
Issue may be in client-side validation.
Test Strategy Template
## Test Plan: [Feature Name]
### Scope
- What's being tested
- What's NOT being tested
### Test Cases
#### Unit Tests
- [ ] Function X handles valid input
- [ ] Function X rejects invalid input
- [ ] Function X handles edge case Y
#### Integration Tests
- [ ] Component A communicates with Service B
- [ ] API endpoint returns correct data format
#### E2E Tests
- [ ] User can complete flow from start to finish
- [ ] Error states show appropriate messages
### Risks
- Areas with less coverage
- Known flaky tests
- Dependencies on external services
Detailed References
