The test in recent versions only worked by mounting and unmounting
partitions where the test is to be run. This was done to correctly
measure the time taken to run the tests.
However, this meant the tests can't be run on systems that don't
have a spare partition (like my development machine). Adding
support for running the test in the current working dir here so
that the program can be tested. Of course, the results should
not be trusted.
Signed-off-by: Amit Shah <email@example.com>