E2e Testing Patterns

---
triggers:
  - "e2e testing patterns"
name: e2e-testing-patterns
description: Master end-to-end testing with Playwright and Cypress to build reliable test suites that catch bugs, improve confidence, and enable fast deployment. Use when implementing E2E tests, debugging flaky tests, or establishing testing standards.
---

# E2E Testing Patterns

Build reliable, fast, and maintainable end-to-end test suites that provide confidence to ship code quickly and catch regressions before users do.

## When to Use This Skill

- Implementing end-to-end test automation
- Debugging flaky or unreliable tests
- Testing critical user workflows
- Setting up CI/CD test pipelines
- Testing across multiple browsers
- Validating accessibility requirements
- Testing responsive designs
- Establishing E2E testing standards

## Core Concepts

### 1. E2E Testing Fundamentals

**What to Test with E2E:**
- Critical user journeys (login, checkout, signup)
- Complex interactions (drag-and-drop, multi-step forms)
- Cross-browser compatibility
- Real API integration
- Authentication flows

**What NOT to Test with E2E:**
- Unit-level logic (use unit tests)
- API contracts (use integration tests)
- Edge cases (too slow)
- Internal implementation details

### 2. Test Philosophy

**The Testing Pyramid:**
```
        /\
       /E2E\         ← Few, focused on critical paths
      /─────\

## Note
Skill content truncated for token efficiency. Full version available in the source repository.