tests/corelib/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);
}