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

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

OAuth2 and OpenID Connect mock server for automated testing and development. Issues cryptographically signed JWTs via JWK key pairs. OIDC-conformant, exposes discovery, JWKS, authorization, token, userinfo, introspection, revocation, and end-session endpo

Mock http requests made using fetch

A lightweight Jest mock for unit testing Express

Storybook MockDate decorator

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

Mock for fully testing any media queries with Jest

Nodejs library to mock express http request

Lightweight Jest compatible spy implementation

Easy as pie nodemailer mock for unit testing your Node.js applications.

Caching mock fetch implementation for all runtimes and frameworks.

🌗 A module used to mock canvas in Vitest.

TypeScript definitions for redis-mock

Intuitive mocking for Typescript class imports

Mock websockets and assert complex websocket interactions with Jest

Type safe mocking library for TypeScript

A simple mock interface specifically for testing code relying on Sequelize models

The node core libs for in browser usage.

TypeScript definitions for mock-knex