| // 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. |
| |
| /// @assertion abstract double roundToDouble() |
| /// Returns the integer value, as a double, closest to this. |
| /// Rounds away from zero when there is no closest integer: |
| /// (3.5).round() == 4 and (-3.5).round() == -4. |
| /// @description Checks the method on a bunch of values. |
| /// @author pagolubev |
| |
| import "../../../Utils/expect.dart"; |
| |
| |
| check(double arg, double expected) { |
| Expect.equals(expected, arg.roundToDouble()); |
| Expect.equals(-expected, (-arg).roundToDouble()); |
| } |
| |
| main() { |
| check(0.1, .0); |
| |
| // min subnormal |
| check(4.9406564584124654e-324, .0); |
| |
| // min normal |
| check(2.2250738585072014e-308, .0); |
| |
| // max normal |
| check(1.7976931348623157e308, 1.7976931348623157e308); |
| |
| // adjacent doubles |
| |
| check(.4999999999999999, .0); |
| check(.49999999999999994, .0); |
| check(.5, 1.0); |
| check(.5000000000000001, 1.0); |
| |
| check(0.9999999999999999, 1.0); |
| check(1.0, 1.0); |
| check(1.0000000000000002, 1.0); |
| } |