port polymer data binding tests

pkg/polymer/test/bind_mdv_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.
+
+// 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.bind_mdv_test;
+
+import 'dart:html';
+import 'package:custom_element/custom_element.dart' show CustomElement;
+import 'package:mdv/mdv.dart' as mdv;
+import 'package:observe/observe.dart';
+import 'package:observe/src/microtask.dart' show runMicrotask;
+import 'package:polymer/platform.dart' as Platform;
+import 'package:unittest/html_config.dart';
+import 'package:unittest/unittest.dart';
+
+main() {
+  mdv.initialize();
+  useHtmlConfiguration();
+  group('bindModel', bindModelTests);
+}
+
+bindModelTests() {
+
+  parseAndBindHTML(html, model) =>
+      (new Element.tag('template')
+        ..setInnerHtml(html, treeSanitizer: const NullTreeSanitizer()))
+        .createInstance(model);
+
+  test('bindModel', () => runMicrotask(() {
+    var test = new MyDivElement()..host = new DivElement();
+    var fragment = parseAndBindHTML('<div id="a" foo="{{bar}}"></div>', test);
+    test.append(fragment);
+    var a = test.query('#a');
+
+    test.bar = 5;
+    Platform.flush();
+    Platform.endOfMicrotask(expectAsync0(() {
+      expect(a.attributes['foo'], '5');
+      test.bar = 8;
+      Platform.flush();
+      Platform.endOfMicrotask(expectAsync0(() {
+        expect(a.attributes['foo'], '8');
+      }));
+    }));
+  }));
+
+  test('bind input', () => runMicrotask(() {
+    var test = new MyDivElement()..host = new DivElement();
+    var fragment = parseAndBindHTML('<input value="{{bar}}" />', test);
+    test.append(fragment);
+    var a = test.query('input');
+
+    test.bar = 'hello';
+    Platform.flush();
+    Platform.endOfMicrotask(expectAsync0(() {
+      expect(a.value, 'hello');
+    }));
+  }));
+}
+
+class MyDivElement extends CustomElement with ObservableMixin {
+  @observable var bar;
+}
+
+class NullTreeSanitizer implements NodeTreeSanitizer {
+  const NullTreeSanitizer();
+  void sanitizeTree(Node node) {}
+}