// 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 subtract(Duration duration)
/// Returns a new DateTime with the duration subtracted from this.
/// @description Checks that the method returns DateTime instance
/// @author hlodvig

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

main() {
  Expect.isTrue(new DateTime(2001, 8, 18, 0, 0, 0, 0).subtract(new Duration(
      days: 0, hours: 0, minutes: 0, seconds: 0, milliseconds: 0)) is DateTime);
  Expect.isTrue(new DateTime(2001, 8, 18, 0, 0, 0, 0).subtract(new Duration(
      days: -100000,
      hours: -100000,
      minutes: -100000,
      seconds: -100000,
      milliseconds: -100000)) is DateTime);
  Expect.isTrue(new DateTime(2001, 8, 18, 0, 0, 0, 0).subtract(new Duration(
      days: 100000,
      hours: 100000,
      minutes: 100000,
      seconds: 100000,
      milliseconds: 100000)) is DateTime);
  Expect.runtimeIsType<DateTime>(new DateTime(2001, 8, 18, 0, 0, 0, 0).subtract(
      new Duration(
          days: 0, hours: 0, minutes: 0, seconds: 0, milliseconds: 0)));
  Expect.runtimeIsType<DateTime>(new DateTime(2001, 8, 18, 0, 0, 0, 0).subtract(
      new Duration(
          days: -100000,
          hours: -100000,
          minutes: -100000,
          seconds: -100000,
          milliseconds: -100000)));
  Expect.runtimeIsType<DateTime>(new DateTime(2001, 8, 18, 0, 0, 0, 0).subtract(
      new Duration(
          days: 100000,
          hours: 100000,
          minutes: 100000,
          seconds: 100000,
          milliseconds: 100000)));
}