This test was always skipped, because the check:
if touch overlay/baz/.wh.cow &&
touch overlay/.wh.deeper &&
touch overlay/baz/another/.wh..wh..opq; then
always fails due to the missing overlay/baz/another directory.
Fix by creating the directory.
# Whiteouts
cd ${test_tmpdir}
-mkdir -p overlay/baz/
+mkdir -p overlay/baz/another/
if touch overlay/baz/.wh.cow && touch overlay/.wh.deeper && touch overlay/baz/another/.wh..wh..opq; then
touch overlay/anewfile
mkdir overlay/anewdir/