Given an object and a property, replaces a property descriptor (or deletes it), and returns a thunk to restore it.

This library emulates ioredis by performing all operations in-memory.

Print PDF files and images to Windows printers from Node.js and Electron. Supports Zebra, Rollo, and other label printers with duplex, paper size, tray selection, and silent printing.

Custom Jest matchers for AWS SDK v3 Client mock

Simplest possible opinionated Babel AST printer for 🐊Putout

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

A lightweight Jest mock for unit testing Express

Mock http requests made using fetch

Print on Epson, Star, Tranca, Daruma, Brother and Custom thermal printers with Node.js

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

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

Lightweight Jest compatible spy implementation

🌗 A module used to mock canvas in Vitest.

Printer plugin for Cordova and Ionic. Prints documents or HTML rendered content

Mock websockets and assert complex websocket interactions with Jest

The node core libs for in browser usage.

TypeScript definitions for mock-fs

Custom matchers for AWS SDK Client mock to be used in vitest

Naive code printer for bracket languages

Mock implementation of the Next.js Router