Best JavaScript Unit Testing Frameworks for 2022

Before fully entering the list of the best frameworks for JavaScript Unit Testing, it is necessary to define what JavaScript is, in case any of our readers are just starting out in this wonderful world of application and website development.

JavaScript is one of the most popular programming languages ​​among application and website developers. It can be defined as a high-level, dynamic, interpreted language used with HTML web applications. It is also used for non-web documents, such as PDF files and desktop widgets.

What is JavaScript Unit Testing?

A Unit Testing, or unit test, refers to the testing method in which JavaScript code written for a web page or application is combined with HTML as an inline event handler and then executed in the browser for the purpose to test if all the functionalities have a correct operation.

The errors that you can run into when doing Unit Testing in JavaScript

Performing Unit Testing can be complicated on some occasions, you may run into any of these problems or errors:

• Some JavaScript is written for a web application and can have multiple dependencies.
• JavaScript is good to use in combination with HTML and CSS rather than on the web
• Difficulties with page rendering and DOM manipulation

The Most Popular JavaScript Unit Testing Frameworks in 2022

Unit.js: Best known as an open-source assertion library, which runs in the browser and in Node.js. It is compatible with other similar frameworks, such as Mocha, Karma, QUnit, Protractor.

QUnit: Its versatility allows it to be used for both client-side and server-side Unit Testing. This free JavaScript framework is commonly used for JQuery projects. It is supported by the node's long-term support program.

Jasmine: This framework is used to test synchronous and asynchronous JavaScript code. It doesn't require DOM and comes with easy syntax that can be written for any test.

Karma: is an open-source productive test environment, which offers complete freedom to write tests with other frameworks like Jasmine, Mocha, and Qunit.

Mocha: runs on Node.js and in the browser too. Mocha, with its ability to do asynchronous testing in an easy way, provides high accuracy and flexibility for reporting.

Jest: Facebook uses this framework to test all the code written in JavaScript, as it provides the “zero-configuration” testing experience, a very attractive one for all developers. It also supports running tests independently, without having to break or conflict with your code.

Surely in one of these frameworks you will find the help you need to develop your next application. Our developers at Rootstack have used some of these to solve technology problems for our customers.

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