tests/run.bats: "run masks" test: accept "unreadable" masked directories

When checking that certain directories are masked, treat the
readable-but-empty case as acceptable, as before, and now also accept
actually-unreadable case, which can happen with crun 1.24.

Signed-off-by: Nalin Dahyabhai <[email protected]>

Author: nalind

tests/run.bats

@@ -981,10 +981,10 @@ _EOF
 
 	run_buildah from --quiet --pull=false $WITH_POLICY_JSON alpine
 	cid=$output
-	for mask in /proc/acpi /proc/kcore /proc/keys /proc/latency_stats /proc/sched_debug /proc/scsi /proc/timer_list /proc/timer_stats /sys/devices/virtual/powercap /sys/firmware /sys/fs/selinux; do
+	for mask in /proc/acpi /proc/interrupts /proc/kcore /proc/keys /proc/latency_stats /proc/sched_debug /proc/scsi /proc/timer_list /proc/timer_stats /sys/devices/virtual/powercap /sys/firmware /sys/fs/selinux; do
 	        if test -d $mask; then
-		   run_buildah run $cid ls $mask
-		   expect_output "" "Directories should be empty"
+                   run_buildah run $cid sh -c "echo $mask/*" # globbing will fail whether it's simply unreadable, or readable but empty
+                   expect_output "$mask/*" "Directories should be empty"
 		fi
 		if test -f $mask; then
 		   run_buildah run $cid cat $mask