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

test/codegen/lib/html/shadow_dom_test.dart

+// Copyright (c) 2011, 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 ShadowDOMTest;
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_individual_config.dart';
+import 'dart:html';
+
+main() {
+  useHtmlIndividualConfiguration();
+
+  group('supported', () {
+    test('supported', () {
+      expect(ShadowRoot.supported, true);
+    });
+  });
+
+  group('ShadowDOM_tests', () {
+
+    var div1, div2, shadowRoot, paragraph1, paragraph2;
+
+    init() {
+      paragraph1 = new ParagraphElement();
+      paragraph2 = new ParagraphElement();
+      [paragraph1, paragraph2].forEach((p) { p.classes.add('foo');});
+      div1 = new DivElement();
+      div2 = new DivElement();
+      div1.classes.add('foo');
+      shadowRoot = div2.createShadowRoot();
+      shadowRoot.append(paragraph1);
+      shadowRoot.append(new ContentElement());
+      div2.append(paragraph2);
+      document.body.append(div1);
+      document.body.append(div2);
+    }
+
+    var expectation = ShadowRoot.supported ? returnsNormally : throws;
+
+    test("Shadowed nodes aren't visible to queries from outside ShadowDOM", () {
+      expect(() {
+        init();
+
+        expect(queryAll('.foo'), equals([div1, paragraph2]));
+      }, expectation);
+    });
+
+    test('Parent node of a shadow root must be null.', () {
+      expect(() {
+        init();
+
+        expect(shadowRoot.parent, isNull);
+      }, expectation);
+    });
+
+
+    // TODO(samhop): test that <content> and <content select="foo"> and
+    // <shadow>
+    // work properly. This is blocked on having a good way to do browser
+    // rendering tests.
+
+    test('Querying in shadowed fragment respects the shadow boundary.', () {
+      expect(() {
+        init();
+
+        expect(shadowRoot.queryAll('.foo'), equals([paragraph1]));
+      }, expectation);
+    });
+
+    if (ShadowRoot.supported) {
+      test('Shadowroot contents are distributed', () {
+
+        var div = new DivElement();
+
+        var box1 = new DivElement()
+          ..classes.add('foo');
+        div.append(box1);
+
+        var box2 = new DivElement();
+        div.append(box2);
+
+        var sRoot = div.createShadowRoot();
+        var content1 = new ContentElement()
+          ..select = ".foo";
+        sRoot.append(content1);
+
+        var content2 = new ContentElement();
+        sRoot.append(content2);
+
+        expect(content1.getDistributedNodes(), [box1]);
+        expect(content2.getDistributedNodes(), [box2]);
+      });
+    }
+  });
+}