Test Framework GitHub Repositories (2026) · Open Source Tools

Kotlin testing made easy, everywhere.

☕️ Classic, reliable, trusted test framework for Node.js and the browser

Open Source Toolkit for Robot Framework, providing Language Server Protocol support, Debugger, VSCode Extension, PyCharm Plugin and powerful CLI tools

Node.js test runner that lets you develop with confidence 🚀

Fluent assertions for Java and Android

Free open-source modern C++20/23 framework to create console (CLI), forms (GUI like WinForms) and unit test (xUnit) applications and libraries on Windows, macOS, Linux, iOS, Android, FreeBSD, Haiku, and SerenityOS.

Golang version of Pact. Pact is a contract testing framework for HTTP APIs and non-HTTP asynchronous messaging systems.

Chaos Monkey for Spring Boot

HTTP mocking library for Rust

PHP Mutation Testing library

Test case generation framework for competitive programming problems

NUnit Framework

Ginger Automation IDE

This repository holds the source code of Microsoft.Testing.Platform (MTP), a lightweight alternative to VSTest, as well as MSTest adapter and framework.

A library that creates fully populated objects for your unit tests.

✅ The programmer-friendly testing framework for Java and the JVM