# Mern E2e

> Manage Playwright E2E tests for critical user journeys.

- Skill: `majiayu000/mern-e2e` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/mern-e2e`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/mern-e2e/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/mern-e2e

---


## Purpose
Create, run, and maintain E2E tests for critical user flows using Playwright.

## Arguments
- `--add <journey>` — Create new journey test (e.g., `signup-flow`, `checkout`)
- `--run` — Run all E2E tests
- `--run <pattern>` — Run tests matching pattern
- `--report` — Generate and display HTML report
- `--fix` — Fix flaky tests with approval

## Test organization

```
apps/web/e2e/
├── journeys/              # User journey tests
│   ├── auth.spec.ts       # Sign up, sign in, sign out
│   ├── onboarding.spec.ts # First-time user flow
│   └── <feature>.spec.ts  # Feature-specific journeys
├── fixtures/              # Test fixtures and helpers
│   ├── auth.ts            # Auth helpers (login as user)
│   └── db.ts              # Database seeding
├── pages/                 # Page Object Models
│   ├── HomePage.ts
│   └── SettingsPage.ts
└── playwright.config.ts   # Playwright configuration
```

## Journey naming
- `auth` — Authentication flows (signup, signin, signout, password reset)
- `onboarding` — First-time user experience
- `<feature>-crud` — Create, read, update, delete for a feature
- `<feature>-workflow` — Multi-step workflows
- `checkout` — Payment/purchase flows
- `settings` — User settings and preferences

## Commands

```bash
# Run all E2E tests
pnpm test:e2e

# Run specific journey
pnpm test:e2e --grep "auth"

# Run in headed mode (watch)
pnpm test:e2e --headed

# Run with UI mode
pnpm test:e2e --ui

# Generate report
pnpm test:e2e --reporter=html && npx playwright show-report
```

## Workflow

### Adding a journey (`--add`)
1. Create test file in `e2e/journeys/<journey>.spec.ts`
2. Create page objects if needed
3. Add fixtures for test data
4. Run to verify
5. Add to CI if not already included

### Running tests (`--run`)
1. Ensure dev server is running or use webServer config
2. Execute tests
3. Report results with pass/fail counts
4. Highlight flaky tests (passed on retry)

### Fixing flaky tests (`--fix`)
1. Identify flaky tests from reports
2. Analyze failure patterns
3. Propose fixes (with approval):
   - Add explicit waits
   - Improve selectors
   - Fix race conditions
   - Mock unstable dependencies
4. Re-run to confirm fix

## Best practices enforced
- Use data-testid for stable selectors
- Avoid time-based waits (`page.waitForTimeout`)
- Isolate tests (no shared state)
- Reset database state between tests
- Use page object models for reusability

## Output
- Test results (pass/fail/flaky counts)
- Failure details with screenshots
- Report location

## Reference
For Playwright setup and patterns, see `reference/mern-e2e-reference.md`