A utility library for formatting error messages, stack traces, and test results in Jest testing framework with enhanced error reporting.

Jest's assertion and testing matcher library that provides a comprehensive set of matchers for writing test assertions

A set of utility functions for expect and related packages

Auto mock all localStorage and sessionStorage APIs for your Jest tests

Module for verifying whether an object has been garbage collected or not.

Jest test runner integration with Jasmine 2.x framework providing BDD-style testing capabilities

Jest matcher for image comparisons used for visual regression testing.

A module used by Jest to create a fast lookup of files in a project

A utility function to get the type of a value

Comprehensive fetch API mocking solution for Jest testing environments with configurable responses and TypeScript support

A comprehensive fake timer implementation for Jest that provides both legacy and modern timer mocking capabilities, enabling developers to control time flow in tests by mocking JavaScript's built-in timer functions.

A Jest preset to painlessly test your Expo / React Native apps.

Enhanced expect assertion library with Jest's snapshot testing matchers for comprehensive test assertions

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.