diff -r 000000000000 -r 6474c204b198 mobile/android/base/tests/testAccounts.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/tests/testAccounts.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,24 @@
+// -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
+/* 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/. */
+
+Components.utils.import("resource://gre/modules/Accounts.jsm");
+
+add_task(function test_Accounts() {
+  let syncExists = yield Accounts.syncAccountsExist();
+  dump("Sync account exists? " + syncExists + "\n");
+  let firefoxExists = yield Accounts.firefoxAccountsExist();
+  dump("Firefox account exists? " + firefoxExists + "\n");
+  let anyExists = yield Accounts.anySyncAccountsExist();
+  dump("Any accounts exist? " + anyExists + "\n");
+
+  // Only one account should exist.
+  do_check_true(!syncExists || !firefoxExists);
+  do_check_eq(anyExists, firefoxExists || syncExists);
+
+  dump("Launching setup.\n");
+  Accounts.launchSetup();
+});
+
+run_next_test();