use .append instead of .nodes.add

tests/html/svg_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.
 
 library SVGTest;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 import 'dart:svg' as svg;
 
 main() {
   useHtmlIndividualConfiguration();
 
   group('svgPresence', () {
     var isSvgElement = predicate((x) => x is svg.SvgElement, 'is a SvgElement');
 
     test('simpleRect', () {
       var div = new Element.tag('div');
-      document.body.nodes.add(div);
+      document.body.append(div);
       div.innerHtml = r'''
 <svg id='svg1' width='200' height='100'>
 <rect id='rect1' x='10' y='20' width='130' height='40' rx='5'fill='blue'></rect>
 </svg>
 
 ''';
 
       var e = document.query('#svg1');
       expect(e, isNotNull);
 
@@ skipping 21 matching lines @@
   group('svgInterfaceMatch', () {
     // Test that SVG elements explicitly implement the IDL interfaces (is-checks
     // only, see SVGTest3 for behavioural tests).
     insertTestDiv() {
       var element = new Element.tag('div');
       element.innerHtml = r'''
 <svg id='svg1' width='200' height='100'>
 <rect id='rect1' x='10' y='20' width='130' height='40' rx='5'fill='blue'></rect>
 </svg>
 ''';
-      document.body.nodes.add(element);
+      document.body.append(element);
       return element;
     }
 
 
     var isElement = predicate((x) => x is Element, 'is an Element');
     var isSvgElement = predicate((x) => x is svg.SvgElement, 'is a SvgElement');
     var isSvgSvgElement =
         predicate((x) => x is svg.SvgSvgElement, 'is a SvgSvgElement');
     var isNode = predicate((x) => x is Node, 'is a Node');
     var isSvgTests = predicate((x) => x is svg.Tests, 'is a svg.Tests');
@@ skipping 33 matching lines @@
       });
     });
 
   insertTestDiv() {
     var element = new Element.tag('div');
     element.innerHtml = r'''
 <svg id='svg1' width='200' height='100'>
 <rect id='rect1' x='10' y='20' width='130' height='40' rx='5'fill='blue'></rect>
 </svg>
 ''';
-    document.body.nodes.add(element);
+    document.body.append(element);
     return element;
   }
 
   group('supported_externalResourcesRequired', () {
     test('supported', () {
       var div = insertTestDiv();
       var r = document.query('#rect1');
       expect(svg.ExternalResourcesRequired.supported(r), true);
       div.remove();
     });
@@ skipping 111 matching lines @@
 
     testRect('rect_SvgTests', checkSvgTests);
     testRect('rect_SvgLangSpace', checkSvgLangSpace);
     testRect('rect_SvgExternalResourcesRequired',
              checkSvgExternalResourcesRequired);
     testRect('rect_SvgLocatable', checkSvgLocatable);
     testRect('rect_SvgTransformable', checkSvgTransformable);
   });
 
 }