Mocking

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

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🌗 A module used to mock canvas in Vitest.

Easy dependency injection for node.js unit testing

All the Fake Data for All Your Real Needs

JSON-Schema + fake data generators

Pretender is a mock server library for XMLHttpRequest and Fetch, that comes with an express/sinatra style syntax for defining routes and their handlers.

Low-level HTTP/HTTPS/XHR request interception library for NodeJS

Auto mock all localstorage and sessionstorage APIs for your Jest tests

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

A fully type safe mocking, call verification and import replacement library for jasmine and jest

Functions to mock the JavaScript aws-sdk

fetch mock for vitest

A set of tools for emulating browser behavior in jsdom environment

Simple, intuitive mocking of Node.js modules.

TypeScript definitions for mock-fs

Easy testing of time-dependent code.

A lightweight Jest mock for unit testing Express

Mock HTTP server for testing HTTP clients and stubbing webservices

Stub TypeScript definitions entry for fetch-mock, which provides its own types definitions

Zod auto-mock object generator using Faker at @faker-js/faker

Mocking library for TypeScript

Lightweight REST client to interact with a running WireMock server

Fake data generator

Fake S3 server for node

Core of @pact-foundation/pact. You almost certainly don't want to depend on this directly.

tap plugin adding t.mockRequire() and t.mockImport()

XMLHttpRequest mock for testing

Super Simple, Yet Powerful, TypeScript Library for Creating Mocks. Mockingbird allows you to create class mocks like a breeze with a simple yet powerful @Mock decorator

A Location class that implements the Location interface of the Web API.

Mock websockets and assert complex websocket interactions with Jest

Jest hooks for JSDOM location mock

Super Simple, Yet Powerful, TypeScript Library for Creating Mocks. Mockingbird allows you to create class mocks like a breeze with a simple yet powerful @Mock decorator

AngularJS mocks for testing

A storybook addon to mock fetch/XHR request

A mock backend for testing React DnD apps

A minimal test double library for TDD with JavaScript

Axios mock for Jest

Utility for mocking XMLHttpRequest.

REST API Testing Tool for all levels in a Test Pyramid

Redis client mock object for unit testing

Mock AWS S3 SDK for Node.js

Mock STDIN file descriptor in Node.js

An NSubstitute port to TypeScript called substitute.js.

An implementation of Amazon's DynamoDB built on LevelDB

visx mock data

Easily unit test LaunchDarkly feature flagged components with jest

A memory version of postgres

Jest wrapper for fetch-mock, a comprehensive stub for fetch

mock stdout and stderr