testing

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

• Test Patterns - Common testing patterns by type
• Bug Hunting - How to find bugs systematically