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Best 9 JavaScript Testing Frameworks

Don’t worry though! I am going to highlight the top 9 JavaScript testing frameworks that make testing easier based upon your testing requirements.

The thing that makes Jest special is that it provides an integrated framework that does not require any experience in the configuration. The tool is ready to use and if you are using npm you can set it up instantly by running the following command.

Well, whether you want to use Jest or Jasmine depends entirely on your requirement. If your project requires debugging the test cases in an IDE that does not support Jest, Jasmine is obviously the best choice. Still, I would suggest giving Jest a shot is totally worth it because of the investments Facebook is currently making and the positive experience that the React developers community is getting.

Mocha is a JavaScript testing framework meant for testing applications that run using Node.js. Mocha is rated as #2 JavaScript automation testing framework for stateofjs survey of 2018.

The installation is very simple. You only require a workstation and install Mocha using the following commands.

For global installation run the below command:
npm i –global mocha.

If you want to install mocha as a dependency for development, run npm i –save-dev mocha.

You can take this certification as proof of expertise in the field of test automation with JavaScript to empower yourself and boost your career.

Here’s a short glimpse of the Selenium JavaScript 101 certification from LambdaTest:

Developers as well as testers like Mocha for many reasons.

Well, the time required for setup and configuration makes Mocha a less popular framework. Organizations who have switched to Jest have found no better alternative. Jest makes testing a lot faster with very little requirement for configuration. Although the ecosystem of Mocha is quite vast, the complexity that comes with it is not sometimes worth.

Jasmine, mostly used for asynchronous testing is a feature-rich JavaScript automation testing framework for JavaScript. The application runs on Node.js and allows accurate and flexible bug reporting by serially running the test cases. Jasmine is ranked on #3 for JavaScript testing framework according to stateofjs 2018.

Installation of Jasmine is very simple. All you need is a workstation with internet connectivity. Run the below command in cmd/ terminal for installing Jasmine.

However, the configuration is a bit complicated than Jest. You have to set up and configure the test.js file before running the test cases.

If your project is large and requires integrating it with external libraries then obviously Jasmine is the best choice because of its age and large user base. If your project is small and especially if you are using React JS, we would suggest using Jest because of its rising popularity among other users.

Now, that we are done with the top 3 testing frameworks as per stateofjs 2018. I will be highlighting some frameworks which although are not a part of the survey but are considered very useful by the testing community in my opinion.

Since Nightwatch is meant for testing Node.js applications, your workstation should have the latest stable version of Node.js installed. Also, install npm since it is needed for installing the framework.

For running the framework locally, you will also need a standalone Selenium server along with the WebDriver API. This will help you to test applications locally using Firefox or Chrome.

Once your workstation is ready, run the following command in cmd.

For an end to end testing of Node.js based web applications, Nightwatch is obviously the best but if you think about the bigger picture, it has a lot of dependencies. You don’t have that much choice of using external unit testing applications and has lesser support than Protractor or WebDriverIO.

We have got Jest for automated testing of React JS applications. But what about Angular developers. Being one of the oldest and popular frameworks for developing single-page applications, its good to have a framework dedicated to testing Angular JS and Angular applications. Protractor is here to the rescue. It is an end to end automation testing framework dedicated for testing your angular application in a real browser, making automated interaction just like a real user.

First of all, you will need to have npm and Angular installed in your system. We hope you already have that since you are developing an Angular application. You will also need a Selenium server which will enable the application to run cross browser compatible test cases. Once your system is set up, run the following command in cmd.

That’s it. You are good to go. Start writing the test cases and have fun testing your angular application.

Once again, Protractor is the best framework for testing Angular applications but since it works only for Chrome, it’s better to use Selenium if your project demands cross-browser testing. Selenium works fine for Angular applications and providing XPath will also define waits and other locators. Selenium also has huge community support and makes cross-browser testing easier because of its support over multiple browsers.

Speaking about JavaScript testing frameworks, Selenium WebDriver is certainly the most widely accepted, and loved automation testing framework for web-applications. You can use Selenium for performing automated cross browser testing in a thorough manner. And the fact that it is open-source makes Selenium WebDriver one of the top JavaScript testing frameworks in the industry. Not only can you use Selenium to perform automation testing with JavaScript, but you can also use it for other programming languages too.

Puppeteer is another Node.js based automated testing library which provides an API that helps the users to control Chrome by overriding the standard DevTools protocol. Many scenarios which can be done manually in the browser can be automated with the help of Puppeteer

Puppeteer will require your workstation to have the latest version of Chrome along with Chromium. You will also need to have yarn or npm installed in your system. Node.js is again another must have since the framework is meant for testing Node.js based web applications.

Automation scripts written using Puppeteer overrides the DevTools Protocol API. Instead of crafting web sockets payloads, calling an API will automatically

Puppeteer allows the users to mock resources, thereby avoiding reliability, consistency and speed issues. You can manipulate external resources like CSS selectors to make your specific test case execute faster.

Puppeteer’s biggest disadvantage is that it works only with Chrome. If your project demands the application to be cross-browser compatible, you will have to depend on NightWatch or other frameworks to test the application across other browsers.

The fact that it makes headless testing easier is the main reason behind the popularity of Puppeteer. However, as mentioned earlier, it only makes sense to use Puppeteer if you are developing an application that is to be used exclusively in Chrome. If you are developing a cross-browser compatible web application, you can go for TestCafe, Nightwatch or other frameworks that make an end to end testing easier across multiple browsers.

Karma was developed to bring a testing environment to developers. An environment where they have to worry less about configuration. They can only write code and get feedback instantly from the test cases.

Since the application is based on Node.js, you will need to have Node.js installed on your system. After that, you can install Karma globally by running the following command on CMD.

Well, surprisingly there are not any notable disadvantages of using Karma.

Currently, Karma is considered to be one of the best JS frameworks. When compared to Jest, Jest has many unfixed bugs and does not support .mjs files on a native environment. Even, a single error has multiple error messages for Jest. However, these issues are not there with Karma.

Cypress is a next-generation front-end testing tool built for the modern web. With Cypress, developers can write end-to-end tests, integration tests, and unit tests. Cypress is built on JavaScript — the popular front-end language and only supports the Mocha JS framework.

As the Mocha framework runs on Node.js, before installing Cypress, you need to install the dependent packages:

Once Node JS is installed, we install Mocha and Cypress from the terminal using npm, the Node package manager.

Run the following command on the terminal to install Mocha:

Run the following command on the terminal to install Cypress:

Cypress was built for addressing the major pain points faced by developers and QA engineers when coming up with test applications. Cypress offers winning features like automatic scrolling; real-time reloads, time travel, top-notch execution speed, and more that are not available in other frameworks. If you are proficient in JavaScript and are looking for a tool that can perform automation testing on a local machine, you should check out Cypress. To sum up, if your web application is built using modern JavaScript frameworks like React, Angular, etc. and cross browser testing is not of high priority, Cypress might suit the bill.

That’s all from our end. We have listed frameworks dedicated for testing specific framework based web applications along with general applications for automated testing of any JavaScript-based web applications. Which one you should go for depends entirely on your requirement. Measure criteria like cross browser compatibility, a framework used for development, development methodology and decide the one that suits your needs. Also, let us know if you have come across other testing frameworks and why they were better for testing your web applications. Happy testing! 🙂

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