Add all dart:html tests from the sdk to test/codegen.

test/codegen/lib/html/datalistelement_test.dart

Index: test/codegen/lib/html/datalistelement_test.dart
diff --git a/test/codegen/lib/html/datalistelement_test.dart b/test/codegen/lib/html/datalistelement_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..2fd9fa8175d3e20eda0b53531dc99378444ee07d
--- /dev/null
+++ b/test/codegen/lib/html/datalistelement_test.dart
@@ -0,0 +1,68 @@
+// Copyright (c) 2012, 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 datalistelement_dataview_test;
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+import 'dart:html';
+
+main() {
+  useHtmlConfiguration();
+
+  var isDataListElement =
+      predicate((x) => x is DataListElement, 'is a DataListElement');
+
+  var div;
+
+  setUp(() {
+      div = new DivElement();
+      document.body.append(div);
+      div.innerHtml = """
+<input id="input" list="browsers" />
+<datalist id="browsers">
+  <option value="Chrome">
+  <option value="Firefox">
+  <option value="Internet Explorer">
+  <option value="Opera">
+  <option value="Safari">
+</datalist>
+""";
+    });
+
+  tearDown(() {
+      document.body.nodes.removeLast();
+    });
+
+  // Support is checked in element_types test.
+  var expectation = DataListElement.supported ? returnsNormally : throws;
+
+  test('is', () {
+    expect(() {
+      var list = document.query('#browsers');
+      expect(list, isDataListElement);
+    }, expectation);
+  });
+
+  test('list', () {
+    expect(() {
+      var list = document.query('#browsers');
+      var input = document.query('#input');
+      expect(input.list, list);
+    }, expectation);
+  });
+
+  test('options', () {
+    expect(() {
+      var options = document.query('#browsers').options;
+      expect(options.length, 5);
+    }, expectation);
+  });
+
+  test('create', () {
+    expect(() {
+      var list = new DataListElement();
+      expect(list, isDataListElement);
+    }, expectation);
+  });
+}