From: krush11 <krushnalpatel11@gmail.com>

Although  has the same functionality as test_path_is_file(), in
the case where test_path_is_file() fails, we get much better debugging
information.

Replace  with test_path_is_file so that future developers
will have a better experience debugging these test cases.

Signed-off-by: Krushnal Patel  <krushnalpatel11@gmail.com>

Submitted-As: https://lore.kernel.org/git/pull.982.git.git.1616147527082.gitgitgadget@gmail.com