Roll Observatory packages and add a roll script

packages/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 'package:polymer/polymer.dart';
+import 'package:unittest/html_config.dart';
+import 'package:unittest/unittest.dart';
+
+@CustomTag('x-selector')
+class XSelector extends PolymerElement {
+  XSelector.created() : super.created();
+}
+
+@CustomTag('x-overlay')
+class XOverlay extends PolymerElement {
+  XOverlay.created() : super.created();
+}
+
+@CustomTag('x-menu')
+class XMenu extends XSelector {
+  XMenu.created() : super.created();
+}
+
+@CustomTag('x-menu-button')
+class XMenuButton extends PolymerElement {
+  XMenuButton.created() : super.created();
+}
+
+main() => initPolymer().then((zone) => zone.run(() {
+  useHtmlConfiguration();
+
+  setUp(() => Polymer.onReady);
+
+  test('bubbling in the right order', () {
+    var item1 = querySelector('#item1');
+    var menuButton = querySelector('#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.querySelector('#menu');
+    var overlay = menuButton.shadowRoot.querySelector('#overlay');
+    var expectedPath = <Node>[
+      item1,
+      menuButton.shadowRoot.querySelector('#menuButtonContent'),
+      menu.shadowRoot.olderShadowRoot.querySelector('#selectorContent'),
+      menu.shadowRoot.olderShadowRoot.querySelector('#selectorDiv'),
+      menu.shadowRoot.olderShadowRoot,
+      menu.shadowRoot.querySelector('#menuShadow'),
+      menu.shadowRoot.querySelector('#menuDiv'),
+      menu.shadowRoot,
+      menu,
+      menuButton.shadowRoot.querySelector('#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(expectAsync((e) {
+        expect(e.currentTarget, node);
+        expect(x++, i);
+      }));
+    }
+
+    item1.dispatchEvent(new Event('x', canBubble: true));
+  });
+}));