Migrate test block 7 to Dart 2.0.

tests/corelib_strong/double_round_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 'package:expect/expect.dart';
-
-main() {
-  Expect.equals(0, 0.0.round());
-  Expect.equals(0, double.MIN_POSITIVE.round());
-  Expect.equals(0, (2.0 * double.MIN_POSITIVE).round());
-  Expect.equals(0, (1.18e-38).round());
-  Expect.equals(0, (1.18e-38 * 2).round());
-  Expect.equals(1, 0.5.round());
-  Expect.equals(1, 0.9999999999999999.round());
-  Expect.equals(1, 1.0.round());
-  Expect.equals(1, 1.000000000000001.round());
-
-  Expect.equals(
-      179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368,
-      double.MAX_FINITE.round());
-
-  Expect.equals(0, (-double.MIN_POSITIVE).round());
-  Expect.equals(0, (2.0 * -double.MIN_POSITIVE).round());
-  Expect.equals(0, (-1.18e-38).round());
-  Expect.equals(0, (-1.18e-38 * 2).round());
-  Expect.equals(-1, (-0.5).round());
-  Expect.equals(-1, (-0.9999999999999999).round());
-  Expect.equals(-1, (-1.0).round());
-  Expect.equals(-1, (-1.000000000000001).round());
-  Expect.equals(
-      -179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368,
-      (-double.MAX_FINITE).round());
-
-  Expect.isTrue(0.0.round() is int);
-  Expect.isTrue(double.MIN_POSITIVE.round() is int);
-  Expect.isTrue((2.0 * double.MIN_POSITIVE).round() is int);
-  Expect.isTrue((1.18e-38).round() is int);
-  Expect.isTrue((1.18e-38 * 2).round() is int);
-  Expect.isTrue(0.5.round() is int);
-  Expect.isTrue(0.9999999999999999.round() is int);
-  Expect.isTrue(1.0.round() is int);
-  Expect.isTrue(1.000000000000001.round() is int);
-  Expect.isTrue(double.MAX_FINITE.round() is int);
-
-  Expect.isTrue((-double.MIN_POSITIVE).round() is int);
-  Expect.isTrue((2.0 * -double.MIN_POSITIVE).round() is int);
-  Expect.isTrue((-1.18e-38).round() is int);
-  Expect.isTrue((-1.18e-38 * 2).round() is int);
-  Expect.isTrue((-0.5).round() is int);
-  Expect.isTrue((-0.9999999999999999).round() is int);
-  Expect.isTrue((-1.0).round() is int);
-  Expect.isTrue((-1.000000000000001).round() is int);
-  Expect.isTrue((-double.MAX_FINITE).round() is int);
-}