diff -r 000000000000 -r 6474c204b198 services/sync/tests/unit/test_resource_ua.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/services/sync/tests/unit/test_resource_ua.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,94 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+Cu.import("resource://services-sync/constants.js");
+Cu.import("resource://services-sync/resource.js");
+Cu.import("resource://services-sync/service.js");
+Cu.import("resource://services-sync/util.js");
+Cu.import("resource://testing-common/services/sync/utils.js");
+
+// Tracking info/collections.
+let collectionsHelper = track_collections_helper();
+let collections = collectionsHelper.collections;
+
+let meta_global;
+let server;
+
+let expectedUA;
+let ua;
+function uaHandler(f) {
+  return function(request, response) {
+    ua = request.getHeader("User-Agent");
+    return f(request, response);
+  };
+}
+
+function run_test() {
+  Log.repository.rootLogger.addAppender(new Log.DumpAppender());
+  meta_global = new ServerWBO('global');
+  server = httpd_setup({
+    "/1.1/johndoe/info/collections": uaHandler(collectionsHelper.handler),
+    "/1.1/johndoe/storage/meta/global": uaHandler(meta_global.handler()),
+  });
+
+  ensureLegacyIdentityManager();
+  setBasicCredentials("johndoe", "ilovejane");
+  Service.serverURL = server.baseURI + "/";
+  Service.clusterURL = server.baseURI + "/";
+  _("Server URL: " + server.baseURI);
+
+  expectedUA = Services.appinfo.name + "/" + Services.appinfo.version +
+               " FxSync/" + WEAVE_VERSION + "." +
+               Services.appinfo.appBuildID;
+
+  run_next_test();
+}
+
+add_test(function test_fetchInfo() {
+  _("Testing _fetchInfo.");
+  Service._fetchInfo();
+  _("User-Agent: " + ua);
+  do_check_eq(ua, expectedUA + ".desktop");
+  ua = "";
+  run_next_test();
+});
+
+add_test(function test_desktop_post() {
+  _("Testing direct Resource POST.");
+  let r = new AsyncResource(server.baseURI + "/1.1/johndoe/storage/meta/global");
+  r.post("foo=bar", function (error, content) {
+    _("User-Agent: " + ua);
+    do_check_eq(ua, expectedUA + ".desktop");
+    ua = "";
+    run_next_test();
+  });
+});
+
+add_test(function test_desktop_get() {
+  _("Testing async.");
+  Svc.Prefs.set("client.type", "desktop");
+  let r = new AsyncResource(server.baseURI + "/1.1/johndoe/storage/meta/global");
+  r.get(function(error, content) {
+    _("User-Agent: " + ua);
+    do_check_eq(ua, expectedUA + ".desktop");
+    ua = "";
+    run_next_test();
+  });
+});
+
+add_test(function test_mobile_get() {
+  _("Testing mobile.");
+  Svc.Prefs.set("client.type", "mobile");
+  let r = new AsyncResource(server.baseURI + "/1.1/johndoe/storage/meta/global");
+  r.get(function (error, content) {
+    _("User-Agent: " + ua);
+    do_check_eq(ua, expectedUA + ".mobile");
+    ua = "";
+    run_next_test();
+  });
+});
+
+add_test(function tear_down() {
+  server.stop(run_next_test);
+});
+