| // 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 static void approxEquals(num expected, num actual, |
| /// [num tolerance = null, String reason = '']) |
| /// Failure if the difference between expected and actual is greater than the |
| /// given tolerance. |
| /// @description Checks that using arguments with (non-NAN) difference exceeding |
| /// the specified non-negative, non-NAN tolerance always results in failure. |
| /// @author rodionov |
| |
| import "../../../Utils/expect.dart"; |
| |
| import "dart:math" as Math; |
| |
| main() { |
| final double MIN_DOUBLE = Math.pow(2.0, -1074) as double; |
| final double NEG_MIN_DOUBLE = -1 * MIN_DOUBLE; |
| final double MAX_DOUBLE = |
| (2 - Math.pow(2.0, -52)) * Math.pow(2.0, 1023) as double; |
| final double NEG_MAX_DOUBLE = -1 * MAX_DOUBLE; |
| |
| check(100.0, 101, 0.1); |
| check(100.0, 101, 0.2, ""); |
| check(100.0, 101, 0.3, "not empty"); |
| |
| check(101, 100.0, 0); |
| check(101, 100.0, 0, ""); |
| check(101, 100.0, 0, "not empty"); |
| |
| check(100.0, 101, 0.0); |
| check(100.0, 101, 0.0, ""); |
| check(100.0, 101, 0.0, "not empty"); |
| |
| check(double.infinity, 0, MAX_DOUBLE); |
| check(double.infinity, 0, MAX_DOUBLE, ""); |
| check(double.infinity, 0, MAX_DOUBLE, "not empty"); |
| |
| check(double.negativeInfinity, 0, MAX_DOUBLE); |
| check(double.negativeInfinity, 0, MAX_DOUBLE, ""); |
| check(double.negativeInfinity, 0, MAX_DOUBLE, "not empty"); |
| |
| check(double.infinity, MAX_DOUBLE, MAX_DOUBLE); |
| check(double.infinity, MAX_DOUBLE, MAX_DOUBLE, ""); |
| check(double.infinity, MAX_DOUBLE, MAX_DOUBLE, "not empty"); |
| |
| check(double.negativeInfinity, MAX_DOUBLE, MAX_DOUBLE); |
| check(double.negativeInfinity, MAX_DOUBLE, MAX_DOUBLE, ""); |
| check(double.negativeInfinity, MAX_DOUBLE, MAX_DOUBLE, "not empty"); |
| |
| check(double.infinity, NEG_MAX_DOUBLE, MAX_DOUBLE); |
| check(double.infinity, NEG_MAX_DOUBLE, MAX_DOUBLE, ""); |
| check(double.infinity, NEG_MAX_DOUBLE, MAX_DOUBLE, "not empty"); |
| |
| check(double.negativeInfinity, NEG_MAX_DOUBLE, MAX_DOUBLE); |
| check(double.negativeInfinity, NEG_MAX_DOUBLE, MAX_DOUBLE, ""); |
| check(double.negativeInfinity, NEG_MAX_DOUBLE, MAX_DOUBLE, "not empty"); |
| } |
| |
| void check(num arg1, num arg2, num tolerance, [String reason = '']) { |
| try { |
| Expect.approxEquals(arg1, arg2, tolerance, reason); |
| throw new Exception("ExpectException expected"); |
| } on ExpectException catch(e) { |
| } |
| } |