Added a test for the database protection feature.

test/test.bash

@@ -119,6 +119,13 @@ cat ./protected/motto >/dev/null 2>/dev/null &&
   echo "[ICFS-TEST]: OK" ||
   echo "[ICFS-TEST]: echo cannot read protected/motto despite access being permitted!" # OK
 
+# test database access
+if [[ -r "./.pt.db" || -w "./.pt.db" ]]; then
+  echo "[ICFS-TEST]: permanent permissions is accessible!"
+else
+  echo "[ICFS-TEST]: OK"
+fi
+
 # unmount
 
 sleep 0.5