LibTest/core/int/operator_unary_minus_A01_t01.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 The unary '-' operator. 
/// @description Checks that this operator returns correct value.
/// @author vasya

import "../../../Utils/expect.dart";

main() {
  List<int> v = [0, 1, 10, 2147483647, 4294967295, 9007199254740991];
  Expect.equals(0, -v[0]);
  Expect.equals(0, -(-v[0]));
  Expect.equals(-1, -v[1]);
  Expect.equals(1, -(-v[1]));
  Expect.equals(-10, -v[2]);
  Expect.equals(-2147483647, -(v[3]));
  Expect.equals(-4294967295, -(v[4]));
  Expect.equals(-9007199254740991, -(v[5]));
  Expect.equals(9007199254740991, -(-(v[5])));

  for(int i = 0; i <= 1000; i++) {
    int num = 1 << i;
    Expect.equals(num, -(-num));
    num = -1 << i;
    Expect.equals(num, -(-num));
  }
}