visx mock data

mocking window.matchmedia with vitest

Mock implementation of the Google Cloud Storage SDK.

A lightweight Vitest mock for unit testing Express

Jest utility to mock the console

TypeScript definitions for redux-mock-store

A lightweight simple helper utility to mock web-servers

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

Mock both 2D and WebGL contexts in Vitest.

AWS Lambda mock context object

[ ](https://www.npmjs.com/package/wiremock)

Generate Faker.js mock data factories with Kubb. Produces realistic seed data and fixtures for development and testing.

Mocking framework

child_process.spawn mocking library

Adds fetch() mocking to Storybook.js using fetch-mock

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

Node stream mock module

Vite Plugin for API mock dev server.

provides native ESM import and globals mocking for unit tests

Node core modules for React Native