[CMake] Unit Testing

[Jeffrey Drake]

I have been trying to figure out the easiest way to setup unit tests. I
have seen a unit testing framework called 'check' (some documentation:
http://check.sourceforge.net/doc/check.html/Setting-Up-the-Money-Build.html#Setting-Up-the-Money-Build ) but the problem seems to be that its examples are all with automake. 

So what is the easiest way of doing automated unit tests with CMake? I
have looked at CTest, but I am not understanding it very well either. I
would need a very basic example to see how it works.

Any help is appreciated.
Jeff.