diff -r 000000000000 -r 6474c204b198 addon-sdk/source/test/test-packaging.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/test/test-packaging.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,46 @@
+/* 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";
+
+var options = require("@loader/options");
+
+exports.testPackaging = function(assert) {
+  assert.equal(options.metadata.description,
+                   "Add-on development made easy.",
+                   "packaging metadata should be available");
+  try {
+    options.metadata.description = 'new description';
+    assert.fail('should not have been able to set options.metadata property');
+  }
+  catch (e) {}
+
+  assert.equal(options.metadata.description,
+                   "Add-on development made easy.",
+                   "packaging metadata should be frozen");
+
+  assert.equal(options.metadata.permissions['private-browsing'], undefined,
+                   "private browsing metadata should be undefined");
+  assert.equal(options.metadata['private-browsing'], undefined,
+                   "private browsing metadata should be be frozen");
+  assert.equal(options['private-browsing'], undefined,
+                   "private browsing metadata should be be frozen");
+
+  try {
+    options.metadata['private-browsing'] = true;
+    assert.fail('should not have been able to set options.metadata property');
+  }
+  catch(e) {}
+  assert.equal(options.metadata['private-browsing'], undefined,
+                   "private browsing metadata should be be frozen");
+
+  try {
+    options.metadata.permissions['private-browsing'] = true;
+    assert.fail('should not have been able to set options.metadata.permissions property');
+  }
+  catch (e) {}
+  assert.equal(options.metadata.permissions['private-browsing'], undefined,
+                   "private browsing metadata should be be frozen");
+};
+
+require('sdk/test').run(exports);