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JUnit is a simple framework to write repeatable tests. It is an instance of the xUnit architecture for unit testing frameworks.

A framework makes it easy to write small tests, yet scales to support complex functional testing for applications and libraries. It is a mature full-featured Python testing tool.

It is a mocking framework that tastes really good. It lets you write beautiful tests with a clean & simple API. It doesn’t give you hangover because the tests are very readable and they produce clean verification errors.

Behaviour Driven Development for Ruby. Making TDD Productive and Fun.

It is a free, open source, community-focused unit testing tool for the .NET Framework. It is the latest technology for unit testing C#, F#, VB.NET and other .NET languages. It works with ReSharper, CodeRush, TestDriven.NET and Xamarin.

PHPUnit is a programmer-oriented testing framework for PHP. It is an instance of the xUnit architecture for unit testing frameworks.

It is a mocking library for .NET developed from scratch to take full advantage of .NET Linq expression trees and lambda expressions, which makes it the most productive, type-safe and refactoring-friendly mocking library available. And it supports mocking interfaces as well as classes.

An evolving, open source framework designed for writing and running tests in Microsoft .NET programming languages.It is an aspect of test-driven development , which is part of a larger software design paradigm known as Extreme Programming

Cucumber is a tool that supports Behaviour-Driven Development (BDD) - a software development process that aims to enhance software quality and reduce maintenance costs.

It is a testing framework designed to simplify a broad range of testing needs, it covers all categories of tests: unit, functional, end-to-end, integration, etc.Run your tests in arbitrarily big thread pools with various policies available (all methods in their own thread, one thread per test class, etc.

Capybara helps you test web applications by simulating how a real user would interact with your app. It is agnostic about the driver running your tests and comes with Rack::Test and Selenium support built in. WebKit is supported through an external gem.

You can test Scala, Scala.js (JavaScript), and Java code with this tool. It makes it easy to take your testing to a higher, more productive level in new or existing Scala, Scala.js, or Java projects.

It is a testing and specification framework for Java and Groovy applications. What makes it stand out from the crowd is its beautiful and highly expressive specification language. It is compatible with most IDEs, build tools, and continuous integration servers.

It is a tool which can help you write clean and working PHP code using behaviour driven development or BDD. BDD is a technique derived from test-first development.

It is a generic test automation framework for acceptance testing and acceptance test-driven development. It has easy-to-use tabular test data syntax and it utilizes the keyword-driven testing approach. Its testing capabilities can be extended by test libraries implemented either with Python or Java, and users can create new higher-level keywords from existing ones using the same syntax that is used for creating test cases.

It is an open-source testing framework for infrastructure with a human- and machine-readable language for specifying compliance, security and policy requirements.

It is a simple and complete React DOM testing utility that encourage good testing practices. It provides light utility functions on top of react-dom and react-dom/test-utils, in a way that encourages better testing practices.

It is a pure node.js end-to-end solution for testing web apps. It takes care of all the stages: starting browsers, running tests, gathering test results and generating reports.

It is a framework that brings fast and reliable unit tests to Android. Tests run inside the JVM on your workstation in seconds. Test drive your Android application with robolectric

It is python’s xUnit style framework. It works much the same as the other styles of xUnit, and if you’re familiar with unit testing in other languages, this framework (or derived versions), may be the most comfortable for you.

It is an open source Behavior-Driven Development framework for PHP. It is a tool to support you in delivering software that matters through continuous communication, deliberate discovery and test-automation.

It is a blazing fast unit test framework powered by Vite. It aims to position itself as the Test Runner of choice for Vite projects, and as a solid alternative even for projects not using Vite.

Full-stack testing framework for PHP. Run browsers tests, framework tests, APIs tests, unit tests with ease.

It is used to define, manage and automatically execute human-readable acceptance tests in .NET projects. Writing easily understandable tests is a cornerstone of the BDD paradigm and also helps build up a living documentation of your system.

Combines API test-automation, mocks and performance-testing into a single, unified framework. The BDD syntax popularized by Cucumber is language-neutral, and easy for even non-programmers. Besides powerful JSON & XML assertions, you can run tests in parallel for speed - which is critical for HTTP API testing.

High velocity native mobile development requires us to adopt continuous integration workflows, which means our reliance on manual QA has to drop significantly. It tests your mobile app while it's running in a real device/simulator, interacting with it just like a real user.

It is behaviour-driven development, Python style. It uses tests written in a natural language style, backed up by Python code.

It is a library for writing concise, readable, boilerplate-free tests in Java using Selenium WebDriver.

It is an open-source library focused on making mocking in Kotlin great. It is a library with the possibility of mocking default arguments, final classes, varargs, coroutines and extension methods.

It is an automated UI testing tool that makes it fast and easy to create, maintain, and execute functional tests across desktop, web, and mobile applications. With TestComplete, you can increase test coverage and ensure you ship high-quality, battle-tested software

It is an integration and functional testing platform that can be used for Java middleware testing. With the main goal of making integration (and functional) tests as simple to write as unit tests, it brings the tests to the runtime environment, freeing developers from managing the runtime from within the test.

It is an open source project. The code base is not owned by any company. A lot of information is shared by the FitNesse community. It's extremely adaptable and is used in areas ranging from Web/GUI tests to testing electronic components.

It is a mocking library for TypeScript inspired by Mockito. It is strongly typed, can capture arguments passed to a method, and recording multiple behaviors.

Poltergeist is a driver for Capybara. It allows you to run your Capybara tests on a headless WebKit browser, provided by PhantomJS.

A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Targets .NET Framework 4.5 and 4.7, as well as .NET Core 2.0, .NET Core 3.0, .NET Standard 1.3, 1.6 and 2.0.

It is a unit testing library for the C++ programming language, based on the xUnit architecture. The library is released under the BSD 3-clause license. It can be compiled for a variety of POSIX and Windows platforms, allowing unit-testing of C sources as well as C++ with minimal source modification.

It is a flexible and comprehensive testing project for Kotlin with multiplatform support.

It is a JUnit extension (also usable with Ant) targeted at database-driven projects that, among other things, puts your database into a known state between test runs. This is an excellent way to avoid the myriad of problems that can occur when one test case corrupts the database and causes subsequent tests to fail or exacerbate the damage.

It is a Java-based framework supporting Behaviour-Driven Development (BDD), an evolution of Test-Driven Development (TDD) and Acceptance-Test Driven Developement (ATDD).

It is f# web automation and testing library, built on top of Selenium (friendly to c# also). It makes UI testing simple.

A Unified platform for Web, Mobile apps and API services' Automated Testing, It is test automation ecosystem with all the essential elements required for Agile & Continuous Delivery teams. Automated tests are written in simple English & involves no complex coding but with the flexibility that enterprise teams need. The tests can be run in parallel on thousands of device/OS/browser combos and physical mobile devices on a massive device cloud as well as on your local machines. It lets you drill down to specific test environments and identify what failed and why.

It allows users to create and run Appium, Selenium, XCUITest & Espresso tests against real devices and web browsers. Users can create & execute hundreds of manual or automated tests in parallel on IOS & Android devices. Users can automate their cross-browser testing, perform visual testing and access advanced analytics.

It is a very simple BDD tool based on the Cucumber, which currently has many more features than Lettuce. It aims the most common tasks on BDD and it focus specially on those that make BDD so fun.

Happo is a visual regression testing tool. It hooks into your CI environment to compare the visual appearance of UI components before and after a change. Screenshots are taken in different browsers and across different screen sizes to ensure consistent cross-browser and responsive styling of your application.

Next-gen Software Quality Management Platform brings together automated and manual testing. Level up your product quality control and boost your QA and development team productivity by setting your TestOps.

Split Ruby, JavaScript tests on parallel CI nodes to save time.

It is a chaos testing tool for Docker containers, inspired by Netflix Chaos Monkey. The main benefit is that it works with containers instead of VMs. It can kill, stop, restart running Docker containers or pause processes within specified containers. We use it for resilience testing of our distributed applications.

It automates anything you see on the screen of your desktop computer running Windows, Mac or some Linux/Unix. It uses image recognition powered by OpenCV to identify and control GUI components.

Smart Unit Testing Solutions for .NET and C/C++. Make unit testing easy for Test Driven Development and Automated Software Testing Tools.

Imagium provides AI based visual testing solution for various forms of testing. It makes the job easier for QA Automation, Mobile Testers, DevOps and Compliance teams. Imagium is easy to integrate with any programing language