// Copyright (c) 2017, 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.

// @dart = 2.9

/// @assertion void sleep(Duration duration)
/// Sleep for the duration specified in [duration].
/// @description Checks that exception is thrown if [duration] is negative.
/// @author iarkh@unipro.ru

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

main(List<String> args) {
  Duration dur = new Duration (milliseconds: -3);
  Expect.throws(() { sleep(dur); }, (e) => e is ArgumentError);
}