svg and json tests: fixing nested test calls

tests/html/svgelement_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 SvgElementTest;
 import "package:expect/expect.dart";
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 import 'dart:svg' as svg;
@@ skipping 225 matching lines @@
     });
   });
 
   group('supported_set', () {
     test('supported', () {
       expect(svg.SetElement.supported, true);
     });
   });
 
   group('constructors', () {
-    test('supported', () {
+    group('supported', () {
       testConstructor('a', (e) => e is svg.AElement);
       testConstructor('circle', (e) => e is svg.CircleElement);
       testConstructor('clipPath', (e) => e is svg.ClipPathElement);
       testConstructor('defs', (e) => e is svg.DefsElement);
       testConstructor('desc', (e) => e is svg.DescElement);
       testConstructor('ellipse', (e) => e is svg.EllipseElement);
       testConstructor('g', (e) => e is svg.GElement);
       testConstructor('image', (e) => e is svg.ImageElement);
       testConstructor('line', (e) => e is svg.LineElement);
       testConstructor('linearGradient', (e) => e is svg.LinearGradientElement);
@@ skipping 159 matching lines @@
       var el = new svg.CircleElement();
       var classes = el.classes;
       expect(el.classes.length, 0);
       classes.toggle('foo');
       expect(el.classes.length, 1);
       classes.toggle('foo');
       expect(el.classes.length, 0);
     });
   });
 }