Testcafe Skill
> Generates TestCafe automation tests in JavaScript or TypeScript. Supports local
Install
one command, takes just this skill from the repositorynpx skills add https://github.com/LambdaTest/agent-skills --skill testcafe-skillThe instruction itself
9 sections, as written by the authorTestCafe Automation Skill
Core Patterns
Basic Test
import { Selector } from 'testcafe';
fixture('Login').page('https://example.com/login');
test('Login with valid credentials', async t => {
await t
.typeText('#username', '[email protected]')
.typeText('#password', 'password123')
.click('button[type="submit"]')
.expect(Selector('.dashboard').exists).ok();
});
Selectors
const submitBtn = Selector('button').withText('Submit');
const listItems = Selector('.item').count;
const nthItem = Selector('.item').nth(2);
const filtered = Selector('.item').withAttribute('data-status', 'active');
Page Model
import { Selector, t } from 'testcafe';
class LoginPage {
constructor() {
this.usernameInput = Selector('#username');
this.passwordInput = Selector('#password');
this.submitButton = Selector('button[type="submit"]');
}
async login(username, password) {
await t
.typeText(this.usernameInput, username)
.typeText(this.passwordInput, password)
.click(this.submitButton);
}
}
export default new LoginPage();
TestMu AI Cloud
See reference/cloud-integration.md for full cloud setup and shared/testmu-cloud-reference.md for capabilities.
export LT_USERNAME=your_username
export LT_ACCESS_KEY=your_key
npx testcafe "lambdatest:Chrome@latest:Windows 11" tests/
Anti-Patterns
| Bad | Good | Why |
|-----|------|-----|
| await t.wait(5000) | Smart assertions with timeout | Arbitrary delays |
| Deep CSS selectors | Selector().withText() | Fragile |
| No error screenshots | t.takeScreenshot() on failure | Missing debug info |
Quick Reference
| Task | Command |
|------|---------|
| Run all | npx testcafe chrome tests/ |
| Run headless | npx testcafe chrome:headless tests/ |
| Run specific | npx testcafe chrome tests/login.js |
| Multiple browsers | npx testcafe chrome,firefox tests/ |
| Live mode | npx testcafe chrome tests/ --live |
| Screenshot | await t.takeScreenshot() |
| Resize | await t.resizeWindow(1280, 720) |
Deep Patterns
For advanced patterns, debugging guides, CI/CD integration, and best practices,
see reference/playbook.md.
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How to use it
Take lambdatest/testcafe-skill from the repository into ~/.claude/skills for personal
use, or into .claude/skills inside a project.
The agent identifies a skill by the name field in its header. Two skills with the
same name cannot sit side by side — one of them will be ignored.
The instructions reference npx.
Without those the skill loads but fails at the first command.