FEATURE_TESTING_CHECKLIST.md

Feature Testing Checklist

Quick reference checklist for developers adding new features

🎯 Pre-Development Planning

• Requirements Analysis

  • Identify all user scenarios (happy path + edge cases)
  • Map out component interactions and data flow
  • Determine external dependencies (APIs, databases, services)
  • Plan test data requirements and mocking strategy

• Test Strategy

  • Define unit test scope and coverage targets
  • Identify integration points to test
  • Plan end-to-end user journeys
  • Consider accessibility and performance requirements

---

🧪 Unit Testing Requirements

UI Components

• Basic Rendering

  • Renders with default props
  • Renders with all prop combinations
  • Handles missing/undefined props gracefully

• Variants & States

  • Tests all visual variants (primary, secondary, etc.)
  • Tests all functional states (disabled, loading, error, success)
  • Tests size variations (sm, md, lg)

• User Interactions

  • Click events handled correctly
  • Keyboard navigation works (Tab, Enter, Escape, Arrow keys)
  • Focus management implemented
  • Form submission and validation

• Accessibility

  • ARIA attributes present and correct
  • Screen reader compatibility tested
  • Color contrast requirements met
  • Keyboard accessibility verified
  • testAccessibility() helper used

• Technical Details

  • Ref forwarding works (if applicable)
  • Custom props passed through correctly
  • CSS classes applied properly
  • Component composition works

Business Logic & Services

• Core Functionality

  • Main function logic tested with various inputs
  • Return values validated for all scenarios
  • Side effects properly tested

• Error Handling

  • Invalid input handled gracefully
  • Appropriate errors thrown with correct messages
  • Network failures handled
  • Timeout scenarios covered

• Edge Cases

  • Empty data sets
  • Maximum/minimum limits
  • Boundary conditions
  • Null/undefined values

Hooks & State Management

• State Initialization

  • Correct initial state values
  • Default parameters work
  • Dependencies properly initialized

• State Updates

  • State changes work correctly
  • Multiple state updates handled
  • Async state updates managed

• Lifecycle & Cleanup

  • Effect hooks run at correct times
  • Cleanup functions prevent memory leaks
  • Unmounting handled properly

---

🔗 Integration Testing Requirements

API Integration

• Successful Responses

  • Data fetching works correctly
  • Response data properly processed
  • State updated correctly after API calls

• Error Scenarios

  • Network errors handled (offline, timeout)
  • HTTP error status codes (400, 401, 403, 404, 500)
  • Malformed response data handled
  • Rate limiting scenarios

• Authentication Integration

  • Protected routes require authentication
  • Tokens included in requests
  • Token refresh handled
  • Logout clears authentication state

Multi-tenant Integration

• Tenant Context

  • Current tenant context properly used
  • Organization switching works
  • Tenant-specific data filtering

• Permissions & Security

  • Role-based access control enforced
  • Row-level security policies tested
  • Cross-tenant data isolation verified

Component Integration

• Parent-Child Communication

  • Props passed down correctly
  • Callbacks trigger parent updates
  • Context shared properly

• Form Integration

  • Form validation triggers correctly
  • Field updates propagate
  • Form submission workflows complete

---

🌐 End-to-End Testing Requirements

Critical User Paths

• Feature Discovery

  • User can find and access the feature
  • Navigation to feature works from multiple entry points
  • Feature loads completely

• Core Workflow

  • Happy path workflow completes successfully
  • User receives appropriate feedback at each step
  • Data persists correctly throughout workflow

• Error Recovery

  • User can recover from validation errors
  • Network issues handled gracefully
  • User guided back to working state

Cross-Browser Testing

• Desktop Browsers

  • Chrome/Chromium functionality verified
  • Firefox compatibility confirmed
  • Safari/WebKit tested

• Mobile Testing

  • Mobile Chrome tested
  • Mobile Safari tested
  • Responsive design works
  • Touch interactions function

Performance & Visual Testing

• Visual Regression

  • Screenshots captured for all states
  • Visual changes reviewed and approved
  • Color modes tested (light/dark)

• Performance

  • Page load times within acceptable limits
  • Bundle size impact documented
  • Memory usage monitored

---

📊 Coverage & Quality Requirements

Code Coverage

• Minimum Thresholds Met

  • Branches: 80% minimum
  • Functions: 80% minimum
  • Lines: 80% minimum
  • Statements: 80% minimum

• Coverage Quality

  • Tests actually validate behavior (not just coverage)
  • Critical paths have 100% coverage
  • Error paths properly tested

Test Quality

• Test Independence

  • Tests don't depend on each other
  • Tests can run in any order
  • Proper setup and teardown

• Test Maintainability

  • Tests are readable and well-documented
  • Test data is realistic and meaningful
  • Mocks are realistic and current

---

🚨 Pre-Merge Checklist

Local Testing

• All unit tests pass: npm run test
• Integration tests pass: npm run test:integration
• E2E tests pass: npm run test:e2e
• Coverage meets requirements: npm run test:coverage
• No accessibility violations: npm run test:a11y
• Visual tests pass: npm run test:visual

Code Quality

• Linting passes: npm run lint
• Type checking passes: npm run type-check
• Bundle size acceptable: npm run bundle:check
• No console errors or warnings

Documentation

• Test documentation updated
• Feature documentation includes testing notes
• Breaking changes documented
• Migration guide provided (if needed)

---

🔄 CI/CD Verification

Automated Checks

• All CI tests pass in GitHub Actions
• Cross-browser tests pass
• Bundle size analysis completed
• Security scans pass
• Performance benchmarks meet standards

Manual Verification

• Feature tested in staging environment
• Edge cases verified in production-like environment
• Performance acceptable under load
• Monitoring and alerting configured

---

📋 Feature-Specific Checklists

Authentication Features

• Login/logout flows tested end-to-end
• Password reset workflow complete
• Social authentication providers work
• Session management tested
• Security vulnerabilities addressed

CRUD Operations

• Create operations tested with validation
• Read operations handle empty states
• Update operations preserve data integrity
• Delete operations include confirmation
• Bulk operations tested

Payment/Billing Features

• Payment flows tested with Stripe test mode
• Subscription management workflows
• Invoice generation and delivery
• Failed payment scenarios handled
• PCI compliance requirements met

Multi-tenant Features

• Data isolation between tenants verified
• Organization member management tested
• Invitation workflows complete
• Permission inheritance tested
• Tenant switching workflows

---

⚠️ Common Pitfalls to Avoid

Testing Mistakes

• ❌ Testing implementation details instead of behavior
• ❌ Writing tests that don't actually test anything
• ❌ Relying too heavily on snapshot tests
• ❌ Not testing error scenarios
• ❌ Forgetting to test accessibility

Integration Issues

• ❌ Not mocking external dependencies properly
• ❌ Tests that depend on network conditions
• ❌ Hardcoded test data that breaks in different environments
• ❌ Not testing with realistic data volumes

E2E Problems

• ❌ Flaky tests that pass/fail randomly
• ❌ Tests that are too slow or resource-intensive
• ❌ Not testing on different screen sizes
• ❌ Forgetting to test keyboard navigation

---

🎯 Success Criteria

Your feature is ready when:

• ✅ All tests pass consistently
• ✅ Coverage meets or exceeds 80% threshold
• ✅ No accessibility violations detected
• ✅ Performance benchmarks within acceptable range
• ✅ Visual regression tests approved
• ✅ Cross-browser compatibility verified
• ✅ Documentation updated and complete
• ✅ Code review completed and approved
• ✅ CI/CD pipeline passes all checks

Remember: Quality is not negotiable. Every feature must meet these standards before it can be merged and deployed.