[CMake] ctest 'magic string' -> failure

[Matthew Woehlke]

Is there any way to arrange for running ctest to mark a test as failed 
if it outputs a particular string? I'm using ctest to write unit tests 
for a library that has some debugging facilities where if something goes 
wrong, it dumps an error message, but doesn't cause the function to 
fail, so I can't detect it in the test program. (And, no, changing the 
library is NOT an option.)

Alternatively, there /is/ a hook to make the messages trip an abort()... 
is there a way to make 'make test'/'ctest' set an environment variable 
for all tests it runs? Or would I be stuck remembering to set it before 
calling 'make test'/'ctest'?

-- 
Matthew
That said, if this is coming out of your posterior then you should 
consider your diet. -- Richard Moore, in response to Aaron Seigo's 
stated source of suggested enum values.