Converting Polymer's WebComponentsLoaded to an onReady future

pkg/polymer/test/events_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library polymer.test.web.events_test;
 
 import 'dart:html';
-import 'dart:async';
+import 'package:polymer/polymer.dart';
+import 'package:unittest/html_config.dart';
 import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
 
 main() {
   useHtmlConfiguration();
 
+  setUp(() => Polymer.onReady);
+
   test('host event', () {
     // Note: this test is currently the only event in
     // polymer/test/js/events.js at commit #7936ff8
-    Timer.run(expectAsync0(() {
-      var testA = query('#a');
-      expect(testA.xtag.clicks, isEmpty);
-      testA.click();
-      expect(testA.xtag.clicks, ['host click on: test-a (id a)']);
-    }));
+    var testA = query('#a');
+    expect(testA.xtag.clicks, isEmpty);
+    testA.click();
+    expect(testA.xtag.clicks, ['host click on: test-a (id a)']);
   });
 
   test('local event', () {
-    Timer.run(expectAsync0(() {
-      var testB = query('#b');
-      expect(testB.xtag.clicks, isEmpty);
-      testB.click();
-      expect(testB.xtag.clicks, []);
-      var b1 = testB.shadowRoot.query('#b-1');
-      b1.click();
-      expect(testB.xtag.clicks, []);
-      var b2 = testB.shadowRoot.query('#b-2');
-      b2.click();
-      expect(testB.xtag.clicks, ['local click under test-b (id b) on b-2']);
-    }));
+    var testB = query('#b');
+    expect(testB.xtag.clicks, isEmpty);
+    testB.click();
+    expect(testB.xtag.clicks, []);
+    var b1 = testB.shadowRoot.query('#b-1');
+    b1.click();
+    expect(testB.xtag.clicks, []);
+    var b2 = testB.shadowRoot.query('#b-2');
+    b2.click();
+    expect(testB.xtag.clicks, ['local click under test-b (id b) on b-2']);
   });
 }