[CMake] Testing an exe with gtest - possible?

[cen]

Hi

I have an existing c++ exe project which I want to test with gtest. I 
have not yet found an easy way to keep the project as is and test it 
directly since gtest insists (obviously) to link against the code being 
tested. I found a smart answer on SO to link against object files and 
that works ok but it's messy and a lot of manual setup after cmake 
project generation, probably impossible to automate in cmake.

The other quick way is to change the VS project output to a static lib. 
That also works but is a manual step which again not sure can be 
automated at all. And there is a bigger issue hidden in here.. I can't 
link to this lib due to dual main() entry point.

So unless there is some smart workaround to keep project as an exe and 
get gtest to work, I guess the only remaining option is to separate the 
main() into a small bootstrap exe and then link against the rest of the 
program (which contains the actual testable logic) as a lib. Finally, if 
I understand correctly, using target_link_libraries will automatically 
set up the two projects as dependent and lib will always get built 
before the main is run.


Hopefully not inventing hot water in 2019 here.


Best regards, cen