E2E Playwright Testing

Patterns and conventions for reliable end-to-end browser testing with Playwright.

Comprehensive E2E testing guide for web applications. Contains 8 rules across 6 categories covering locator strategies, authentication reuse, form testing (including React/SPA-specific gotchas), assertions, test organization, reliability, and CI/CD configuration.

Stack Detection

Before writing or reviewing E2E tests, detect the project stack:

Step 1 — Check for Playwright

# Look in package.json devDependencies:
# "@playwright/test" → Playwright is installed
# Check for playwright.config.js or playwright.config.ts