added preliminary ShadowDOM tests

tests/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('../../lib/unittest/unittest.dart');
+#import('../../lib/unittest/html_config.dart');
+#import('dart:html');
+
+main() {
+  useHtmlConfiguration();
+  
+  group('ShadowDOM tests', () {
+
+    var div1, div2, shadowRoot, paragraph1, paragraph2;
+
+    setUp(() {
+      paragraph1 = new ParagraphElement();
+      paragraph2 = new ParagraphElement();
+      [paragraph1, paragraph2].forEach( (p) { p.classes.add('foo');});

[Siggi Cherem (dart-lang), 2012/06/26 23:10:49]

remove space between ( (

[samhop, 2012/06/26 23:16:30]

Done.

+      div1 = new DivElement();
+      div2 = new DivElement();
+      div1.classes.add('foo');
+      shadowRoot = new ShadowRoot(div2);
+      shadowRoot.nodes.add(paragraph1);
+      // No constructor for ContentElement exists yet.
+      // See http://code.google.com/p/dart/issues/detail?id=3870.
+      shadowRoot.nodes.add(new Element.tag('content'));
+      div2.nodes.add(paragraph2);
+      document.body.nodes.add(div1);
+      document.body.nodes.add(div2);
+    });
+
+    test("Shadowed nodes aren't visible to queries from outside ShadowDOM", () {
+      expect(queryAll('.foo'), equals([div1, paragraph2]));
+    });
+
+    test('Parent node of a shadow root must be null.', () {
+      expect(shadowRoot.parent, isNull);
+    });
+
+    
+    // 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(shadowRoot.queryAll('.foo'), equals([paragraph1]));
+    }); 
+  });
+}