Linker error while unit testing with Visual Studio C++

Question

I want to unit test my C++ project with Visual Studio. After adding the folders from my project as include path to my test project, I get linker errors when trying to compil

Answer 1

https://www.codeproject.com/Tips/1085171/How-To-Do-Unit-Testing-with-Cplusplus-in-Visual-St

I found there that you have to add your .h and .cpp files as existing files also to the test project. That is left out on the official documentation or I missed it.

Now it works!