diff -r 000000000000 -r 6474c204b198 modules/libjar/zipwriter/test/unit/test_directory.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/libjar/zipwriter/test/unit/test_directory.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+const DIRNAME1 = "test";
+const DIRNAME1_CORRECT = "test/";
+const DIRNAME2 = "test2/";
+const time = Date.now();
+
+function run_test()
+{
+  zipW.open(tmpFile, PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE);
+
+  zipW.addEntryDirectory(DIRNAME1, time * PR_USEC_PER_MSEC, false);
+  do_check_false(zipW.hasEntry(DIRNAME1));
+  do_check_true(zipW.hasEntry(DIRNAME1_CORRECT));
+  var entry = zipW.getEntry(DIRNAME1_CORRECT);
+  do_check_true(entry.isDirectory);
+
+  zipW.addEntryDirectory(DIRNAME2, time * PR_USEC_PER_MSEC, false);
+  do_check_true(zipW.hasEntry(DIRNAME2));
+  entry = zipW.getEntry(DIRNAME2);
+  do_check_true(entry.isDirectory);
+
+  zipW.close();
+}