generate massive amounts of realistic fake data in Node.js and the browser

Most popular Mocking framework for unit tests written in Java

A mock code autogenerator for Golang

Just like System.Web.Abstractions, but for System.IO. Yay for testable IO access!

A lightweight library to simplify and generalize the process of writing unit tests for C applications.

Firebase mock library for writing unit tests

Efficient Mock Generator for Swift

HTTP mocking for Rust!

A simple and extensible behavioural testing library for Go. You can use api test to simplify REST API, HTTP handler and e2e tests.

🏝 automated contract testing via type checking for Elixir functions and mocks

Build a fake backend by providing the content of JSON files or JavaScript objects through configurable routes.

Mockito for Scala language

Go GORM & SQL mocking library

Library for running Xamarin.Forms inside of unit tests

Library to create mock Ring requests for unit tests

Gonkey - a testing automation tool

This library makes RxJS Observables testing easy!

Prig is a lightweight framework for test indirections in .NET Framework.

A mock library for Dart inspired by mockito

A mocking library for Elixir

Swift Mocking Library

Simple stubbing/spying for AVA

🐵 HTTP mock server, useful to stub services and simulate dynamic API responses, leveraging ASP.NET Core features, built-in fake data generation and pure C# scripting

A collection of utilities to help with unit-testing Sequelize models

Yeoman generator for building a fake backend by providing the content of JSON files or JavaScript objects through configurable routes.

HTTP request mocking library for Puppeteer and Playwright

Tool for providing sample data for AEM applications in a simple and flexible way. Stubbing server on AEM, no separate needed.