// 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

import "dart:io";

import "package:expect/expect.dart";

main() {
  var version = Platform.operatingSystemVersion;
  Expect.isNotNull(version);
  Expect.isTrue(version is String);
}