Testing Strategy Skill

Purpose

Defines comprehensive testing approaches ensuring code quality, security, accessibility, and performance through automated and manual testing.

Testing Pyramid

• 70% Unit Tests (fast, isolated, many)

• 20% Integration Tests (moderate speed, component interaction)

• 10% E2E Tests (slow, full user journeys)

Unit Testing Standards

• Minimum 80% code coverage

• 100% coverage for critical paths

• Test all public APIs and error handling

• Use AAA pattern (Arrange, Act, Assert)

Integration Testing

• Database queries and transactions

• API endpoint functionality

• External service integration

• Cache behavior

E2E Testing (Playwright/Cypress)

• Critical user journeys

• Form submissions

• Cross-browser compatibility

• Responsive design verification

Security Testing

• SAST — CodeQL, ESLint security plugins

• Dependency Scanning — npm audit, Dependabot

• DAST — OWASP ZAP scans

• Common vulnerability tests (SQLi, XSS, CSRF)

Accessibility Testing (WCAG 2.1 AA)

• Keyboard navigation

• Screen reader compatibility

• Color contrast (4.5:1 normal, 3:1 large)

• axe-core automated checks

Performance Testing

• LCP < 2.5s, FID < 100ms, CLS < 0.1

• Lighthouse performance audits

• Load testing under peak conditions

CI Pipeline Integration

steps:

• Run linter
• Run unit tests with coverage
• Run integration tests
• Run E2E tests
• Security scan
• Lighthouse CI

Related Policies

• Secure Development Policy