cfix — Unit Testing Framework for C and C++ CFIX AT A GLANCE cfix is an xUnit testing framework for C/C++, specialized for unmanaged Windows development (32/64 bit). cfix supports development of both user and kernel mode unit tests. cifx unit tests are compiled and linked into a DLL. The testrunner application provided by cfix allows selectively running tests of one or more of such test-DLLs. Exec