Web testing with Playwright, Vitest, k6. E2E/unit/integration/load/security/visual/a11y testing. Use for test automation, flakiness, Core Web Vitals, mobile gestures, cross-browser.

Web Testing Skill Comprehensive web testing: unit, integration, E2E, load, security, visual regression, accessibility. Quick Start Testing Pyramid (70 20 10) Layer Ratio Framework Speed Unit 70% Vitest/Jest <50ms Integration 20% Vitest + fixtures 100 500ms E2E 10% Playwright 5 30s When to Use Unit : Functions, utilities, state logic Integration : API endpoints, database ops, modules E2E : Critical flows (login, checkout, payment) Load : Pre release performance validation Security : Pre deploy vulnerability scanning Visual : UI regression detection Reference Documentation Core Testing ./references/unit integration testing.md Unit/integration patterns ./references/e2e testing playwright.md Playwright E2E workflows ./references/component testing.md React/Vue/Angular component testing ./references/testing pyramid strategy.md Test ratios, priority matrix Cross Browser & Mobile ./references/cross browser checklist.md Browser/device matrix ./references/mobile gesture testing.md Touch, swipe, orientation ./references/shadow dom testing.md Web components testing Interactive & Forms ./references/interactive testing patterns.md Forms, keyboard, drag drop ./references/functional testing checklist.md Feature testing Performance & Quality ./references/performance core web vitals.md LCP/CLS/INP, Lighthouse CI ./references/visual regression.md Screenshot comparison ./references/test flakiness mitigation.md Stability strategies Accessibility ./references/accessibility testing.md WCAG checklist, axe core Security ./references/security testing overview.md OWASP Top 10, tools ./references/security checklists.md Auth, API, headers ./references/vulnerability payloads.md SQL/XSS/CSRF payloads API & Load ./references/api testing.md API test patterns ./references/load testing k6.md k6 load test patterns Checklists ./references/pre release checklist.md Complete release checklist CI/CD Integration

web-testing