If PROGRAM_ARGS is provided to get_filename_component, fix bug where the
command failed to honor the CACHE argument.
Added test cases to RunCMake.get_filename_component that fail when the
bug is not fixed to prevent regressions.
Signed-off-by: James Johnston <johnstonj.public@codenest.com>
The RunCMake.get_filename_component test now tests basic functionality
of the PROGRAM component argument of get_filename_component.
Signed-off-by: James Johnston <johnstonj.public@codenest.com>
The RunCMake.get_filename_component test was improved to assert that
each test variable outputted by get_filename_component is or is not
a cache variable, as per the particular test.
Signed-off-by: James Johnston <johnstonj.public@codenest.com>