The current scheme of creating temporary files inside the current directory is
very fragile.
First, whenever we start writing new files, the test breaks if we forget to
include it in the list of removed files (likely).
Second, because we have to manually delete the files after we're done with
them, we can either forget, or if the test crashes, the final condition may not
run.
Instead of doing that, let's move the files to a separate directory. That makes
it a lot easier to make sure we're deleting all the relevant files, because we
can just wipe out the whole directory.
All tests are then wrapped in a function that makes sure that the proper setup
is in place.
Signed-off-by: Glauber Costa <glommer@cloudius-systems.com>
c02e3fc16a