Google Test

Google Test, often referred as gtest, is a specialized library utilized to conduct unit testing in the C++ programming language. This library operates under the terms of the BSD 3-clause license. Google Test is based on the xUnit architecture, a systematic methodology for assessing software components.

Google Test can be compiled for a diverse range of computer systems, encompassing those employing POSIX, a set of standard operating system interfaces, as well as the Microsoft Windows platform. This adaptability facilitates the execution of unit tests on both C and C++ codebases, with minimal alterations required in the source code.

Projects using Google Test
Besides being developed and used at Google, many other projects implement Google Test as well:
 * Android Open Source Project operating system
 * Chromium projects (behind the Chrome browser and ChromeOS)
 * LLVM compiler
 * Protocol Buffers (Google's data interchange format)
 * OpenCV computer vision library
 * Robot Operating System
 * Gromacs molecular dynamics simulation package

Related tools
Google Test UI is a software tool for testing computer programs, and serves as a test runner. It employs a 'test binary', a compiled program responsible for executing tests and analyzing their results, to evaluate software functionality. It visually presents the testing progress through a progress bar and displays a list of identified issues or 'test failures'. The tool is primarily written in C#. A Visual Studio extension, Google Test Adapter, complements its functionality within the Visual Studio environment.