Adding tests for SVG's getBoundingClientRect.

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 404 matching lines @@
     test('classes', () {
       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);
     });
   });
+
+  group('getBoundingClientRect', () {
+    test('is a Rect', () {
+      var element = new svg.RectElement();
+      element.attributes['width'] = '100';
+      element.attributes['height'] = '100';
+      var root = new svg.SvgSvgElement();
+      root.append(element);
+
+      document.body.append(root);
+
+      var rect = element.getBoundingClientRect();
+      expect(rect is Rect, isTrue);
+      expect(rect.width, 100);
+      expect(rect.height, 100);
+    });
+  });
 }