LibTest/core/double/operator_multiplication_A01_t03.dart

/*
 * 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 double operator *(num other)
 * @description Checks that if one of the operands is a zero and the other is 
 * an infinity the result is NaN.
 * @author pagolubev
 * @reviewer msyabro
 */
import "../../../Utils/expect.dart";


final double positive_infinity = 1 / 0;
final double negative_infinity = -1 / 0;

checkNaN(d) {
  var msg = 'expected: NaN, actual: $d';
  Expect.isTrue(d.isNaN, msg);
}

main() {
  checkNaN(positive_infinity * .0);
  checkNaN(.0 * positive_infinity);

  checkNaN(positive_infinity * (-.0));
  checkNaN((-.0) * positive_infinity);

  checkNaN(negative_infinity * .0);
  checkNaN(.0 * negative_infinity);

  checkNaN(negative_infinity * (-.0));
  checkNaN((-.0) * negative_infinity);
}