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Learn how to use Jest framework to configure and run your JavaScript automation testing scripts on the LambdaTest platform

• Pre-requisites
• Run Your First Test
• Executing The Test
• Local Testing With TestNG

Before getting started with Selenium automation testing on LambdaTest, you need to:

• Download and installNodeJS. You should be havingNodeJS v6 or newer. Clickhere to download.
• Make sure you are using the latest version ofJavaScript.
• Installnpm from the official website by clickinghere.
• DownloadSelenium JavaScript bindings from the official website. Latest versions ofSelenium Client andWebDriver are ideal for running your JavaScript automation testing script on LambdaTest’s Selenium Grid.

Clone the LambdaTest’sjest-selenium-webdriver-sample repository and navigate to the code directory as shown below:

git clone https://github.com/LambdaTest/jest-selenium-webdriver-samplecd jest-selenium-webdriver-sample

Next, you need to installJest. Run the below command to install Jest:

npm install --save-dev jest --force

Make sure you have your LambdaTest credentials with you to run test automation scripts on LambdaTest Selenium Grid. You can obtain these credentials from theLambdaTest Automation Dashboard or throughLambdaTest Profile.

Set LambdaTestUsername andAccess Key in environment variables.

• ForLinux/macOS:

export LT_USERNAME="YOUR_USERNAME"export LT_ACCESS_KEY="YOUR ACCESS KEY"

• ForWindows:

$env:LT_USERNAME='YOUR USERNAME'$env:LT_ACCESS_KEY='YOUR ACCESS KEY'

Test Scenario: Let’s check a sampleJest Selenium code running on LambdaTest Selenium Grid. This is a simple Jest test automation script that tests a sample to-do list app. Check out thissingle.test.js file to run your first sample test.

In this code, we are passing browser, browser version, and operating system information, along with LambdaTest Selenium grid capabilities via capabilities object. The capabilities object in the above code are defined as:

constcapabilities={build:'jest-LambdaTest-Single',browserName:'chrome',version:'latest',platform:'Windows 10',};

You can generate capabilities for your test requirements with the help of our inbuiltCapabilities Generator tool.

The tests can be executed in the terminal using the following command

npmtest single.test.js

Your test results would be displayed on the test console (or command-line interface if you are using terminal/cmd) and onLambdaTest automation dashboard. LambdaTest Automation Dashboard will help you view all your text logs, screenshots and video recording for your entire automation tests.

You can test your locally hosted or privately hosted projects withLambdaTest Selenium grid cloud using LambdaTest Tunnel app. All you would have to do is set up an SSH tunnel using LambdaTest Tunnel app and pass toggletunnel = True via desired capabilities. LambdaTest Tunnel establishes a secure SSH protocol based tunnel that allows you in testing your locally hosted or privately hosted pages, even before they are made live.

Refer ourLambdaTest Tunnel documentation for more information.

Here’s how you can establish LambdaTest Tunnel.

Download the binary file of:

• LambdaTest Tunnel for Windows
• LambdaTest Tunnel for Mac
• LambdaTest Tunnel for Linux

Open command prompt and navigate to the binary folder.

Run the following command:

LT -user {user’s login email} -key {user’s access key}

So if your user name islambdatest@example.com and key is 123456, the command would be:

LT -user lambdatest@example.com -key 123456

Once you are able to connectLambdaTest Tunnel successfully, you would just have to pass on tunnel capabilities in the code shown below :

Tunnel Capability

constcapabilities={tunnel:true,}

To run parallel tests usingJest, we would have to execute the below command in the terminal:

npmtest local.test.js

Your test results would be displayed on the test console (or command-line interface if you are using terminal/cmd) and onLambdaTest automation dashboard.

• Advanced Configuration for Capabilities
• How to test locally hosted apps
• How to integrate LambdaTest with CI/CD

Check out our latest tutorials on TestNG automation testing 👇

• Jest Tutorial For Selenium JavaScript Testing With Examples
• Jest vs Mocha vs Jasmine: Comparing The Top 3 JavaScript Testing Frameworks

Visit the following links to learn more about LambdaTest's features, setup and tutorials around test automation, mobile app testing, responsive testing, and manual testing.

• LambdaTest Documentation
• LambdaTest Blog
• LambdaTest Learning Hub

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LambdaTest is a leading test execution and orchestration platform that is fast, reliable, scalable, and secure. It allows users to run both manual and automated testing of web and mobile apps across 3000+ different browsers, operating systems, and real device combinations. Using LambdaTest, businesses can ensure quicker developer feedback and hence achieve faster go to market. Over 500 enterprises and 1 Million + users across 130+ countries rely on LambdaTest for their testing needs.

• Run Selenium, Cypress, Puppeteer, Playwright, and Appium automation tests across 3000+ real desktop and mobile environments.
• Real-time cross browser testing on 3000+ environments.
• Test on Real device cloud
• Blazing fast test automation with HyperExecute
• Accelerate testing, shorten job times and get faster feedback on code changes with Test At Scale.
• Smart Visual Regression Testing on cloud
• 120+ third-party integrations with your favorite tool for CI/CD, Project Management, Codeless Automation, and more.
• Automated Screenshot testing across multiple browsers in a single click.
• Local testing of web and mobile apps.
• Online Accessibility Testing across 3000+ desktop and mobile browsers, browser versions, and operating systems.
• Geolocation testing of web and mobile apps across 53+ countries.
• LT Browser - for responsive testing across 50+ pre-installed mobile, tablets, desktop, and laptop viewports

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