diff -r 000000000000 -r 6474c204b198 addon-sdk/source/test/addons/packed/main.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/test/addons/packed/main.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+/* 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/. */
+"use strict";
+
+const { packed } = require("sdk/self");
+const url = require("sdk/url");
+
+exports["test self.packed"] = function (assert) {
+  assert.ok(packed, "require('sdk/self').packed is correct");
+}
+
+exports["test url.toFilename"] = function (assert) {
+  assert.throws(
+      function() { url.toFilename(module.uri); },
+      /cannot map to filename: /,
+      "url.toFilename() can fail for packed XPIs");
+}
+
+require("sdk/test/runner").runTestsFromModule(module);