diff -r 000000000000 -r 6474c204b198 toolkit/identity/tests/unit/test_identity_utils.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/identity/tests/unit/test_identity_utils.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,46 @@
+
+"use strict";
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import('resource://gre/modules/Services.jsm');
+Cu.import('resource://gre/modules/identity/IdentityUtils.jsm');
+
+function test_check_deprecated() {
+  let options = {
+    id: 123,
+    loggedInEmail: "jed@foo.com",
+    pies: 42
+  };
+
+  do_check_true(checkDeprecated(options, "loggedInEmail"));
+  do_check_false(checkDeprecated(options, "flans"));
+
+  run_next_test();
+}
+
+function test_check_renamed() {
+  let options = {
+    id: 123,
+    loggedInEmail: "jed@foo.com",
+    pies: 42
+  };
+
+  checkRenamed(options, "loggedInEmail", "loggedInUser");
+
+  // It moves loggedInEmail to loggedInUser
+  do_check_false(!!options.loggedInEmail);
+  do_check_eq(options.loggedInUser, "jed@foo.com");
+
+  run_next_test();
+}
+
+let TESTS = [
+  test_check_deprecated,
+  test_check_renamed
+];
+
+TESTS.forEach(add_test);
+
+function run_test() {
+  run_next_test();
+}