TestCafe 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', 'user@test.com')
        .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.