Essential utility functions for Jest's expect assertion library, including deep equality comparisons, object property traversal, and type checking utilities.

Jest testing matchers specifically designed for Enzyme React component testing

Jest Environment Base Class and Types for creating custom test execution environments

A package that can extract and parse a specially-formatted comment called a 'docblock' at the top of a file.

Display differences clearly so people can review changes confidently

Mock Date when run unit test cases with jest to make tests of Date easier.

Core functionality for Jest testing framework providing programmatic APIs for test discovery, scheduling, and CLI integration.

Console utilities for Jest testing framework that provide custom console implementations including BufferedConsole for capturing output, CustomConsole for formatted logging, and NullConsole for suppressing output during tests

A module used internally by Jest to check which files have changed since you last committed in git, hg, or sapling repositories.

Mock canvas when run unit test cases with jest.

CLI for Jasmine, a simple JavaScript testing framework for browsers and Node

Spec reporter for jasmine behavior-driven development framework

Reporters for the Jasmine BDD Framework that enable output in various formats including JUnit XML, NUnit XML, TAP, TeamCity, terminal, and browser console formats

jQuery matchers and fixture loader for Jasmine framework

DOM-less simple JavaScript BDD testing framework for Node.js

Simple JavaScript testing framework for browsers and node.js

A simple yet powerful testing framework for Node.js backend applications and libraries

JavaScript build tool, similar to Make or Rake

Minimal zero-dependency utilities for using JavaScript Iterables in all environments.

Comprehensive JavaScript code coverage tool that computes statement, line, function and branch coverage with module loader hooks for transparent instrumentation