Converting Polymer's WebComponentsLoaded to an onReady future

pkg/polymer/test/event_path_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.event_path_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('bubbling in the right order', () {
-    // TODO(sigmund): this should change once we port over the
-    // 'WebComponentsReady' event.
-    return new Future.delayed(Duration.ZERO).then((_) {
-      var item1 = query('#item1');
-      var menuButton = query('#menuButton');
-      // Note: polymer uses automatic node finding (menuButton.$.menu)
-      // also note that their node finding code also reachs into the ids
-      // from the parent shadow (menu.$.selectorContent instead of
-      // menu.$.menuShadow.$.selectorContent)
-      var menu = menuButton.shadowRoot.query('#menu');
-      var overlay = menuButton.shadowRoot.query('#overlay');
-      var expectedPath = <Node>[
-          item1,
-          menuButton.shadowRoot.query('#menuButtonContent'),
-          menu.shadowRoot.olderShadowRoot.query('#selectorContent'),
-          menu.shadowRoot.olderShadowRoot.query('#selectorDiv'),
-          menu.shadowRoot.olderShadowRoot,
-          menu.shadowRoot.query('#menuShadow'),
-          menu.shadowRoot.query('#menuDiv'),
-          menu.shadowRoot,
-          menu,
-          menuButton.shadowRoot.query('#menuButtonDiv'),
-          // TODO(sigmund): this test is currently broken because currently
-          // registerElement is sensitive to the order in which each custom
-          // element is registered. When fixed, we should be able to add the
-          // following three targets:
-          //   overlay.shadowRoot.query('#overlayContent'),
-          //   overlay.shadowRoot,
-          //   overlay,
-          menuButton.shadowRoot,
-          menuButton
-      ];
-      var x = 0;
-      for (int i = 0; i < expectedPath.length; i++) {
-        var node = expectedPath[i];
-        expect(node, isNotNull, reason: "Should not be null at $i");
-        node.on['x'].listen(expectAsync1((e) {
-          expect(e.currentTarget, node);
-          expect(x++, i);
-        }));
-      }
+    var item1 = query('#item1');
+    var menuButton = query('#menuButton');
+    // Note: polymer uses automatic node finding (menuButton.$.menu)
+    // also note that their node finding code also reachs into the ids
+    // from the parent shadow (menu.$.selectorContent instead of
+    // menu.$.menuShadow.$.selectorContent)
+    var menu = menuButton.shadowRoot.query('#menu');
+    var overlay = menuButton.shadowRoot.query('#overlay');
+    var expectedPath = <Node>[
+        item1,
+        menuButton.shadowRoot.query('#menuButtonContent'),
+        menu.shadowRoot.olderShadowRoot.query('#selectorContent'),
+        menu.shadowRoot.olderShadowRoot.query('#selectorDiv'),
+        menu.shadowRoot.olderShadowRoot,
+        menu.shadowRoot.query('#menuShadow'),
+        menu.shadowRoot.query('#menuDiv'),
+        menu.shadowRoot,
+        menu,
+        menuButton.shadowRoot.query('#menuButtonDiv'),
+        // TODO(sigmund): this test is currently broken because currently
+        // registerElement is sensitive to the order in which each custom
+        // element is registered. When fixed, we should be able to add the
+        // following three targets:
+        //   overlay.shadowRoot.query('#overlayContent'),
+        //   overlay.shadowRoot,
+        //   overlay,
+        menuButton.shadowRoot,
+        menuButton
+    ];
+    var x = 0;
+    for (int i = 0; i < expectedPath.length; i++) {
+      var node = expectedPath[i];
+      expect(node, isNotNull, reason: "Should not be null at $i");
+      node.on['x'].listen(expectAsync1((e) {
+        expect(e.currentTarget, node);
+        expect(x++, i);
+      }));
+    }
 
-      item1.dispatchEvent(new Event('x', canBubble: true));
-    });
+    item1.dispatchEvent(new Event('x', canBubble: true));
   });
 }