Roll Observatory packages and add a roll script

packages/polymer/test/two_way_bind_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.
+
+import 'dart:async';
+import 'dart:html';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+import 'package:polymer/polymer.dart';
+
+@CustomTag('inner-element')
+class InnerElement extends PolymerElement {
+  @published int number;
+  @published bool boolean;
+  @published String string;
+
+  InnerElement.created() : super.created();
+}
+
+@CustomTag('outer-element')
+class OuterElement extends PolymerElement {
+  @observable int number = 1;
+  @observable bool boolean = false;
+  @observable String string = 'a';
+
+  OuterElement.created() : super.created();
+}
+
+main() => initPolymer().then((zone) => zone.run(() {
+  useHtmlConfiguration();
+
+  setUp(() => Polymer.onReady);
+
+  test('inner element gets initial values', () {
+    var outer = querySelector('outer-element');
+    var inner = outer.shadowRoot.querySelector('inner-element');
+
+    expect(inner.number, 1);
+    expect(inner.boolean, false);
+    expect(inner.string, 'a');
+  });
+
+  test('inner element updates the outer element', () {
+    var outer = querySelector('outer-element');
+    var inner = outer.shadowRoot.querySelector('inner-element');
+
+    // Toggle the value in the child and make sure that propagates around.
+    inner.number = 2;
+    inner.boolean = true;
+    inner.string = 'b';
+    return new Future(() {}).then((_) {
+      expect(outer.number, 2);
+      expect(outer.boolean, true);
+      expect(outer.string, 'b');
+
+      inner.number = 1;
+      inner.boolean = false;
+      inner.string = 'a';
+    }).then((_) => new Future(() {})).then((_) {
+      expect(outer.number, 1);
+      expect(outer.boolean, false);
+      expect(outer.string, 'a');
+    });
+  });
+
+  test('outer element updates the inner element', () {
+    var outer = querySelector('outer-element');
+    var inner = outer.shadowRoot.querySelector('inner-element');
+
+    // Toggle the value in the parent and make sure that propagates around.
+    outer.number = 2;
+    outer.boolean = true;
+    outer.string = 'b';
+    return new Future(() {}).then((_) {
+      expect(inner.number, 2);
+      expect(inner.boolean, true);
+      expect(inner.string, 'b');
+
+      outer.number = 1;
+      outer.boolean = false;
+      outer.string = 'a';
+    }).then((_) => new Future(() {})).then((_) {
+      expect(inner.number, 1);
+      expect(inner.boolean, false);
+      expect(inner.string, 'a');
+    });
+  });
+}));