// 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 Node insertBefore(Node newChild, Node refChild)
/// Inserts node into this node directly before refChild.
/// MDN: If refChild is null, newChild is inserted at the end of the
/// list of child nodes.
/// @description Checks expected dom after insert

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

main() {
  var x = new Comment("cool");
  document.insertBefore(x, null);
  Expect.equals(document.lastChild, x, 'insert before null');
}