The code for this recipe is available at https://github.com/dev-cafe/cmake-cookbook/tree/v1.0/chapter-04/recipe-03, and has a C++ example. The recipe is valid with CMake version 3.11 (and higher), and has been tested on GNU/Linux, macOS, and Windows. The code repository also contains an example compatible with CMake 3.5.
In this recipe, we will demonstrate how to implement unit testing using the Google Test framework, with the help of CMake. In contrast to the previous recipe, the Google Test framework is more than a header file; it is a library containing a couple of files that need to be built and linked against. We could place these alongside our code project, but to make the code project more lightweight, we will choose to download a well-defined version of the Google Test sources at configure time, and then build the framework...
