What is the best JavaScript unit testing framework?

i want to know more about unit testing frameworks suitable for Java

There are more than 10 JavaScript unit testing frameworks available in the market, but two of the most widely used frameworks are:

  • 1. JEST

JEST is an open-source JavaScript testing framework, which is maintained by Facebook. It is the first choice of developers for JavaScript testing. Although JEST can cover unit, functional, end-to-end, integration tests, a significant number of JavaScript developers use JEST to automate unit tests. What makes it an ideal choice for developers is the zero-configuration testing experience that it offers. Although it is a universal unit testing framework, it is widely used for applications based on React and ReactJS. Moreover, the convenient and unambiguous interface of the framework makes it even more comfortable for developers to execute unit testing.

Prerequisites JEST requires minimal configuration and maintenance to automate testing of your web app. Few resources that you need to run your tests on JEST include:

  • Installation of Node on your system to set up NPM environment
  • Adequate knowledge of the JEST library before generating unit tests


JEST provides plenty of benefits to developers for JavaScript unit testing; some of the primary benefits are:

  • JEST works out of the box with zero configuration on every JavaScript project
  • The snapshot feature allows you to keep track of large objects with ease
  • Tests can be parallelized by running in their own processes for maximum performance
  • Ideal for React, ReactJS, NodeJS, VueJS, and Babel-based projects
  • Provide standard syntax with documentation support


While JEST is compatible with almost every JavaScript-based application, it cannot be used for larger projects that utilize different types of testing. The reason being less tooling and library support available for it.

  • 2. JASMINE

Jasmine is another open-source JavaScript testing framework introduced in 2010. It can test every JavaScript application, which is not even supported by JEST. Besides, it provides additional support for Behavior-Driven Development (BDD), which ensures that each code snippet of the JavaScript statement is appropriately unit tested. Jasmine proved to be very useful for frontend testing, which includes both responsiveness and visibility testing of web app UI across multiple devices and resolutions. Although majorly used for asynchronous testing, it can be a pretty good Selenium JavaScript framework to automate unit testing.


It’s pretty easy and straightforward to implement Jasmine on your workstation. All you need is a little knowledge of the following things:

  • Installation of standalone library files from Jasmine official website
  • Installation of the latest version of the Jasmine – Edge
  • Adequate knowledge of installing and using IDE like NetBeans


Jasmine is integrated with advanced features and utilities, which provide numerous benefits to the users, such as:

  • Offers a clean, small, and straightforward syntax for easy web app testing
  • Execute test cases that are similar to user behavior on a JavaScript-based app
  • Provide additional support for both frontend and backend tests
  • Doesn’t require any document object model
  • Available with substantial documentation and community support


The only disadvantage of Jasmine is that it cannot run against the real Document Object Model, so it manipulates the components of real DOM to test the JavaScript functions. Another minor drawback is that it is only good with the JavaScript engine it is run against.

Both JEST and Jasmine are ideal unit testing frameworks for JavaScript unit testing. There might be similar functionalities, but the installation and working process of both the frameworks is entirely different.