diff -r 000000000000 -r 6474c204b198 addon-sdk/source/test/test-test-memory.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/test/test-test-memory.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+/* 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 { Cc, Ci, Cu, components } = require('chrome');
+const { gc } = require('sdk/test/memory');
+
+exports.testGC = function(assert, done) {
+  let weakref;
+  let (tempObj = {}) {
+    weakref = Cu.getWeakReference(tempObj);
+    assert.equal(weakref.get(), tempObj, 'the weakref returned the tempObj');
+  }
+
+  gc().then(function(arg) {
+    assert.equal(arg, undefined, 'there is no argument');
+    assert.pass('gc() returns a promise which eventually resolves');
+    assert.equal(weakref.get(), undefined, 'the weakref returned undefined');
+  }).then(done).then(null, assert.fail);
+};
+
+require('sdk/test').run(exports);