Playwright is a NodeJS package which can be used to automate Chrome, Firefox, Edge and Safari browsers in a headless manner. It is developed by the team that created Puppeteer at Google and is actively developed at Microsoft. The advantage of using Headless Testing is that it uses a real browser, but is to run your tests than for example Selenium. much faster The combination of Jest, a NodeJS test runner framework maintained by Facebook with Playwright makes for an excellent Headless Testing combination. Installing jest-playwright There's a NPM library which makes it easy to get started with Jest and Playwright. jest-playwright The package comes in combination with a which you can use as a preset for Jest in . jest-playwright-preset jest.config.js Installing these packages is easy: npm install -D jest jest-playwright-preset playwright Once you've included the Playwright preset, you can either run the tests on a browser on your computer, or connect it to an online browser grid. module.exports = { rootDir: '.', testTimeout: 20000, testMatch: [ '<rootDir>/*.spec.js' ], preset: 'jest-playwright-preset' } Configuring jest-playwright To connect your tests to a Headless Browser grid, please specify the setting in a file called . connectBrowserApp jest-playwright.config.js module.exports = { connectBrowserApp: { wsEndpoint: 'wss://chrome.headlesstesting.com/?token=[YOUR-API-TOKEN]&browserVersion=dev' } } This will instruct Jest Playwright to start and use a headless Chrome browser on the grid. HeadlessTesting.com Running your first test with jest-playwright Now you are ready to run your first test with Jest and Playwright. To get started, create a new test file : sample.spec.js describe('Google', () => { beforeAll(async () => { await page.goto('https://google.com') }) it('should display google text on page', async () => { await expect(page).toMatch('google') }) }) You can now run this sample test: $ jest Depending on whether you want to run this test locally or on a cloud platform, the test will start a headless browser, navigate to Google and verify if the word google appears on the page. expect-playwright There's a NPM package available called . This package provides several Jest utility matchers for Playwright. The package makes it easier and cleaner to write assertions in your test scripts. expect-playwright To get started, you can install the library: npm install -D expect-playwright Now you can use various matchers, for example: await expect(page).toHaveText("h1", "MyPage") Conclusion Jest together with Playwright is a great combination to do Headless Testing. Both frameworks are under active development and keep getting better.
