// 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 DateTime toUtc()
/// Returns this in UTC.
/// Returns itself if it is already in UTC.
/// Otherwise, this method is equivalent to
///   new DateTime.fromMillisecondsSinceEpoch(millisecondsSinceEpoch, isUtc: true)
/// @description Checks that the method returns the correct value.
/// @author iefremov

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

check(millis) {
  DateTime d = DateTime.fromMillisecondsSinceEpoch(millis, isUtc: false);
  Expect.equals(d.toUtc(),
      DateTime.fromMillisecondsSinceEpoch(d.millisecondsSinceEpoch, isUtc: true));
}

main() {
  DateTime d = DateTime.fromMillisecondsSinceEpoch(100500, isUtc: true);
  Expect.identical(d, d.toUtc());

  check(0);
  check(-1);
  check(6031769);
  check(8640000000000000);
  check(-6031769);
  check(-8640000000000000);
}