SKIP_RETURN_CODE
Return code to mark a test as skipped.
Sometimes only a test itself can determine if all requirements for the test are met. If such a situation should not be considered a hard failure a return code of the process can be specified that will mark the test as “Not Run” if it is encountered.
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https://cmake.org/cmake/help/v3.6/prop_test/SKIP_RETURN_CODE.html