Migrated test lock 217 to Dart 2.0.

tests/lib_2/math/rectangle_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.
 
 import 'dart:math';
 import 'package:expect/expect.dart';
 
 main() {
   testConstruction();
   testIntersection();
@@ skipping 268 matching lines @@
     new MutableRectangle.fromPoints(new Point(0, 1), new Point(2, double.NAN)),
   ];
   for (var r in rectangles) {
     Expect.isFalse(r.containsPoint(new Point(0, 1)));
     Expect.isFalse(r.containsRectangle(new Rectangle(0, 1, 2, 3)));
     Expect.isFalse(r.intersects(new Rectangle(0, 1, 2, 3)));
     Expect.isTrue(r.bottom.isNaN);
     Expect.isTrue(r.height.isNaN);
   }
 }