// Copyright (c) 2014, 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 final Node previousNode
/// The previous sibling node.
/// @description Checks that document has no siblings.

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

main() {
  Expect.isNull(document.previousNode);
}