diff -r 000000000000 -r 6474c204b198 modules/libjar/zipwriter/test/unit/test_asyncremove.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/libjar/zipwriter/test/unit/test_asyncremove.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,47 @@
+/* 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/.
+ */
+
+var TESTS = [
+  "test.txt",
+  "test.png"
+];
+
+var observer = {
+  onStartRequest: function(request, context)
+  {
+  },
+
+  onStopRequest: function(request, context, status)
+  {
+    do_check_eq(status, Components.results.NS_OK);
+
+    zipW.close();
+
+    // Empty zip file should just be the end of central directory marker
+    var newTmpFile = tmpFile.clone();
+    do_check_eq(newTmpFile.fileSize, ZIP_EOCDR_HEADER_SIZE);
+    do_test_finished();
+  }
+};
+
+function run_test()
+{
+  // Copy our test zip to the tmp dir so we can modify it
+  var testzip = do_get_file(DATA_DIR + "test.zip");
+  testzip.copyTo(tmpDir, tmpFile.leafName);
+
+  do_check_true(tmpFile.exists());
+
+  zipW.open(tmpFile, PR_RDWR);
+
+  for (var i = 0; i < TESTS.length; i++) {
+    do_check_true(zipW.hasEntry(TESTS[i]));
+    zipW.removeEntry(TESTS[i], true);
+  }
+
+  do_test_pending();
+  zipW.processQueue(observer, null);
+  do_check_true(zipW.inQueue);
+}