[CMake] Skip(ped) test with CTest?

[Christoph Grüninger]

Hi CMake,
can I skip a test with CTest? Currently I do not add a test which is 
dependent on a not found feature, like:

if(feature_found)
   add_test(..)
endif(feature_found)

If all tests pass, I still don't know whether everything is fine, 
because the not added tests are not shown.

Has CMake the possibility to mark tests "to skip".
Or the other way round, if my test detects that the feature is not 
available it exits with status code not zero, let's say 77. And CMake 
does not throw an error but marks the test neither as passed nor failed, 
but as skipped.

If this is not possible, would it be worth to write a feature request in 
the CMake bug tracker?

Bye
Christoph

-- 
People who are more than casually interested in computers should have
at least some idea of what the underlying hardware is like. Otherwise
the programs they write will be pretty weird.         -- Donald Knuth