Google Test, often referred to 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.