diff -r 000000000000 -r 6474c204b198 addon-sdk/source/test/addons/contributors/main.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/test/addons/contributors/main.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 { Cu } = require('chrome');
+const self = require('sdk/self');
+const { AddonManager } = Cu.import('resource://gre/modules/AddonManager.jsm', {});
+
+exports.testContributors = function(assert, done) {
+  AddonManager.getAddonByID(self.id, function(addon) {
+    let count = 0;
+    addon.contributors.forEach(function({ name }) {
+      count++;
+      assert.equal(name, count == 1 ? 'A' : 'B', 'The contributors keys are correct');
+    });
+    assert.equal(count, 2, 'The key count is correct');
+    assert.equal(addon.contributors.length, 2, 'The key length is correct');
+    done();
+  });
+}
+
+require('sdk/test/runner').runTestsFromModule(module);