Jest

About

Jest is a JavaScript testing framework designed to simplify the testing process for developers, making it an ideal tool for anyone working on JavaScript projects. With its focus on simplicity, Jest aims to work seamlessly out of the box, requiring zero configuration for most projects. This delightful framework is perfect for developers who want to ensure the correctness of their JavaScript codebase without the hassle of complex setup.

Details

Zero Config: Works out of the box, config-free, on most JavaScript projects
Snapshots: Makes tests that keep track of large objects with ease, with snapshots living alongside tests or embedded inline
Isolated Tests: Parallelized by running them in their own processes to maximize performance
Great API: Includes the entire toolkit in one place, with a well-documented and well-maintained API
Fast and Safe: Runs tests in parallel while ensuring unique global state, with previously failed tests run first and re-organized based on test file duration
Code Coverage: Generates code coverage by adding the --coverage flag, with no additional setup needed
Easy Mocking: Uses a custom resolver for imports in tests, making it simple to mock any object outside of the test's scope

Related tools

Sponsor

reShorts

Generate viral shorts, fast

AI Video Generation

Sponsor

HeadshotLab

Instant Professional Headhost

AI Headshot

Sponsor

GasbyAI

Fancy AI personal asistant

AI Assistant

Sponsor

CSV Table

View & edit CSV, JSON files for Pros

macOS

RequestResponse

Make HTTP requests to any endpoint and see the response. It's a simple tool to test your API requests and other endpoints.

TestingAPI & Data

FakerAPI

Effortlessly generate realistic dummy data to streamline your development and testing process.

API & DataTesting

Lightspeed

Website performance & Core Web Vitals monitoring.

SEOMonitoring

Storybook

Storybook is an open source tool for developing UI components in isolation.

DevelopmentTesting

Smartlook

Smartlook records users on websites and in mobile apps.

Testing

Cypress

Fast, easy and reliable testing for anything that runs in a browser.

Testing

Percy

The new way to design, develop, and deliver software with confidence.

Testing

Chai

A BDD / TDD assertion library for node and the browser

Testing

Imitate Email

Imitate Email lets developers and users easily test email flows inside the software that they are creating. It provides a sandbox email server as well as a widget that you can embed in your own software

EmailsDevelopment

Mocha

A feature-rich JavaScript test framework running on Node.js

Testing