# e2e-testing

Defines Playwright end-to-end testing patterns for full-stack React and Python applications. Enforces Page Object Model architecture and stable selectors.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 1600 installs · ★ 8
- Author: platform-team
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/hieutrtr/ai1-skills/tree/HEAD/skills/e2e-testing/SKILL.md
- Updated: 2026-02-06
- HTML: https://affpapa.org/en/nevibecode/skills/platform-team-e2e-testing

## What it does

This skill guides agents when setting up browser tests with Playwright. It organizes the `e2e/` directory, extracts page interactions into Page Object Model classes, and separates page actions from test assertions.

Selectors follow a strict order: `data-testid` attributes come first, followed by accessibility roles. Brittle XPath expressions and class-based CSS selectors are banned because layout changes easily break them. The rules also outlaw fixed sleep timeouts like `waitForTimeout`. Instead, tests must wait on URL updates, API responses, or explicit element visibility states.

Node.js 20+ and Playwright 1.40+ are required. The skill focuses strictly on full-stack browser workflows and leaves out component-level React tests or isolated Python backend unit tests.

## Requirements
- Works with: Playwright

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add hieutrtr/ai1-skills --skill e2e-testing -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/e2e-testing/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/e2e-testing/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add hieutrtr/ai1-skills --skill e2e-testing -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/e2e-testing/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add hieutrtr/ai1-skills --skill e2e-testing -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/e2e-testing/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install hieutrtr/ai1-skills e2e-testing
```

2. **Manually: put the files in place**
- File: `.github/skills/e2e-testing/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add hieutrtr/ai1-skills --skill e2e-testing -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/hieutrtr/ai1-skills --path skills/e2e-testing
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/e2e-testing/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add hieutrtr/ai1-skills --skill e2e-testing -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/hieutrtr/ai1-skills/tree/HEAD/skills/e2e-testing/SKILL.md

## When to use it
- build Page Object Model classes for browser flows
- replace fragile CSS selectors with data-testid attributes
- eliminate arbitrary sleep delays using network response waits
- structure full-stack regression tests across auth and CRUD actions

## Example prompts
- Generate a Playwright test and Page Object for the user creation flow
- Refactor tests in e2e/tests/auth to use shared auth fixtures
- Add an end-to-end smoke test verifying search input debounce

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 9f4fe8ee5bf2a945.

BEGIN THIRD-PARTY FILE 9f4fe8ee5bf2a945
````text
---
name: e2e-testing
description: >-
  End-to-end testing patterns with Playwright for full-stack Python/React applications.
  Use when writing E2E tests for complete user workflows (login, CRUD, navigation),
  critical path regression tests, or cross-browser validation. Covers test structure,
  page object model, selector strategy (data-testid > role > label), wait strategies,
  auth state reuse, test data management, and CI integration. Does NOT cover unit tests
  or component tests (use pytest-patterns or react-testing-patterns).
license: MIT
compatibility: 'Playwright 1.40+, Node.js 20+'
metadata:
  author: platform-team
  version: '1.0.0'
  sdlc-phase: testing
allowed-tools: Read Edit Write Bash(npx:*) Bash(npm:*)
context: fork
---

# E2E Testing

## When to Use

Activate this skill when:
- Writing E2E tests for complete user workflows (login, CRUD operations, multi-page flows)
- Creating critical path regression tests that validate the full stack
- Testing cross-browser compatibility (Chromium, Firefox, WebKit)
- Validating authentication flows end-to-end
- Testing file upload/download workflows
- Writing smoke tests for deployment verification

Do NOT use this skill for:
- React component unit tests (use `react-testing-patterns`)
- Python backend unit/integration tests (use `pytest-patterns`)
- TDD workflow enforcement (use `tdd-workflow`)
- API contract testing without a browser (use `pytest-patterns` with httpx)

## Instructions

### Test Structure

```
e2e/
├── playwright.config.ts         # Global Playwright configuration
├── fixtures/
│   ├── auth.fixture.ts          # Authentication state setup
│   └── test-data.fixture.ts     # Test data creation/cleanup
├── pages/
│   ├── base.page.ts             # Base page object with shared methods
│   ├── login.page.ts            # Login page object
│   ├── users.page.ts            # Users list page object
│   └── user-detail.page.ts     # User detail page object
├── tests/
│   ├── auth/
│   │   ├── login.spec.ts
│   │   └── logout.spec.ts
│   ├── users/
│   │   ├── create-user.spec.ts
│   │   ├── edit-user.spec.ts
│   │   └── list-users.spec.ts
│   └── smoke/
│       └── critical-paths.spec.ts
└── utils/
    ├── api-helpers.ts           # Direct API calls for test setup
    └── test-constants.ts        # Shared constants
```

**Naming conventions:**
- Test files: `<feature>.spec.ts`
- Page objects: `<page-name>.page.ts`
- Fixtures: `<concern>.fixture.ts`
- Test names: human-readable sentences describing the user action and expected outcome

### Page Object Model

Every page gets a page object class that encapsulates selectors and actions. Tests never interact with selectors directly.

**Base page object:**
```typescript
// e2e/pages/base.page.ts
import { type Page, type Locator } from "@playwright/test";
````
END THIRD-PARTY FILE 9f4fe8ee5bf2a945

The third-party file has ended. Everything between the 9f4fe8ee5bf2a945 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

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