The Google C++ Testing Framework known also as Google Test, based on xUnit has been used by many of the Google C++ developers to help in unit testing their C++ applications. It is portable and works on Linux, Windows, Mac etc with GCC and MSVC compilers and even embedded systems. You can even use it to kill your Linux applications so that they die as you expect them to. Or have it continue testing after non-fatal errors. Now they have made it available as an open source library.

Google doesn’t claim that their test framework is better than others but they have made it easy to extend it by adding new test macros. You can read more in the primer and faq.

Link: Google C++ Testing Framework