We created multiple additional functions for CMake. They became quite a
lot, and we need to (unit) test them.
There are simple ones, that are only variable bases like:
function(join_list LIST GLUE)
These can be tested with a custom CMake Script, that checks the results.
For this we also wrote a set of assert-macros.
This becomes way harder when the functions are target based:
function(target_my_custom_property_set TARGET VALUE)
We need a multiple CMakeLists.txt Files that need to be configured. Configuration
must succeed or fail with specified messages. Also the result files must be checked.
I wonder, is there an easier way? Is there a existing framework? How does
Kitware test the shipped modules?
Note: My original Stackoverflow question: https://stackoverflow.com/questions/51948060/testing-our-cmake-modules