test renaming overhaul: step 4 client tests

tests/html/document_fragment_tests.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.
 
 testDocumentFragment() {
   Collection<String> _nodeStrings(Collection<Node> input) {
     var out = new List<String>();
     for (Node n in input) {
       if (n is Element) {
         Element e = n;
@@ skipping 327 matching lines @@
   //   // assertConstError(() => fragment.classes.add('foo'));
   // });
 
   test('query searches the fragment', () {
     var fragment = new DocumentFragment.html(
       "<div class='foo'><a>foo</a><b>bar</b></div>");
     Expect.equals("A", fragment.query(".foo a").tagName);
     Expect.listEquals(["A", "B"], _nodeStrings(fragment.queryAll(".foo *")));
   });
 }