Mock a canvas in your jest tests.

Intuitive mocking for Typescript class imports

The industry standard for API mocking in JavaScript.

A lightweight Jest mock for unit testing Express

A robust & optimized `String.prototype.includes` polyfill, based on the ECMAScript 6 specification.

A configurable mock file system. You know, for testing.

a mocked version of a socket.io socket for testing

Mock `window.Date` when run unit test cases with jest. Make tests of `Date` easier.

fetch mock for vitest

Mock HTTP server for testing HTTP clients and stubbing webservices

Mock infrastructure for AI application testing — point your SDK at one local port and every provider, protocol, and service answers deterministically.

A JS mock of the Convex backend for testing your Convex functions.

Functions to mock the JavaScript aws-sdk

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An ESLint plugin providing supplementary rules for use with the @rushstack/eslint-config package

A mock store for testing your redux async action creators and middleware

Easy and powerful mocking of AWS SDK v3 Clients

Easily unit test LaunchDarkly feature flagged components with jest

ES5 shim for ES6 (ECMAScript 6) Reflect and Proxy objects

🌗 A module used to mock canvas in Vitest.