port polymer data binding tests

pkg/polymer/test/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:polymer/polymer.dart';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+import 'package:unittest/matcher.dart';
+
+@CustomTag('x-foo')
+class XFoo extends PolymerElement {
+  @observable var foo = 'foo!';
+  final _ready = new Completer();
+  Future onTestDone;
+
+  XFoo.created() : super.created() {
+    onTestDone = _ready.future.then(_runTest);
+  }
+
+  _runTest(_) {
+    expect(foo, $['foo'].attributes['foo']);
+    expect($['bool'].attributes['foo'], '');
+    expect($['bool'].attributes, isNot(contains('foo?')));
+    expect($['content'].innerHtml, foo);
+    //

[Siggi Cherem (dart-lang), 2013/10/24 00:50:43]

remove?

[Jennifer Messerly, 2013/10/24 00:58:59]

sure. I think that was from original :)

+    expect(foo, $['bar'].attributes['foo']);
+    expect($['barBool'].attributes['foo'], '');
+    expect($['barBool'].attributes, isNot(contains('foo?')));
+    expect($['barContent'].innerHtml, foo);
+  }
+
+  ready() => _ready.complete();
+}
+
+main() {
+  initPolymer();
+  useHtmlConfiguration();
+
+  setUp(() => Polymer.onReady);
+
+  test('ready called', () => query('x-foo').xtag.onTestDone);

[Siggi Cherem (dart-lang), 2013/10/24 00:50:43]

remove xtag

[Jennifer Messerly, 2013/10/24 00:58:59]

Done.

+}