---
title: Learn more about Jest Testing | TestingBot
description: An overview of Jest and how it's used to run automated tests. Jest provides
  plugins to facilitate running automated tests in various environments.
source_url:
  html: https://testingbot.com/software-testing-questions/what-is-jest-testing
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---

# Jest Testing Overview

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Jest is a JavaScript testing framework developed by Facebook. It is widely used for testing JavaScript code, especially for applications built with popular Javascript-based frontend frameworks such as React, Angular and Vue.js.

Jest is designed to be easy use. It provides a comprehensive testing solution and includes features such as test runners, assertions, mocking and code coverage reporting.

[Snapshot testing](https://jestjs.io/docs/snapshot-testing) is also supported, which is similar to [visual regression testing](https://testingbot.com/support/visual-testing) on browsers.

The most important benefits into using Jest are:

- **Mocking**  

Jest provides powerful mocking capabilities to isolate units of code, during testing. You can mock various aspects, for example functions, modules and third-party dependencies.

The benefits of using mocks is that you can control what is returned to a specific piece of code. You can write various tests with multiple mocking responses and make sure your test logic handles all cases.

- **Code Coverage**  

Jest comes with built-in support to report code coverage. Jest will generate detailed reports, indicating which parts of the codebase are covered by tests. This helps to identify areas that may need additional testing.

- **Extensibility**  

Jest is designed to be extensible, which allows developers to customize and extend its functionality. There's a community of Jest developers, creating very [useful Jest plugins](https://github.com/jest-community/awesome-jest).

> TestingBot provides code examples for [Jest and Puppeteer testing](https://testingbot.com/support/web-automate/puppeteer/jest), as well as [Playwright and Jest testing](https://testingbot.com/support/web-automate/playwright/jest).

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