LibTest/html/Element/nextElementSibling_A01_t01.dart

// 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.

/// @assertion final Element nextElementSibling
/// The element immediately following the given one in the tree, or null if
/// there's no sibling node.
/// @description Checks expected attribute values.

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

main() {
  Element x = new Element.html('<span></span>');
  Expect.isNull(x.nextElementSibling);

  x = new Element.html(
      '<div><span>span1</span>text-node<span>span2</span></div>');
  var y = x.firstChild as Element?; // span1

  y = y?.nextElementSibling; // span2, text node should be skipped
  Expect.isTrue(y is SpanElement);

  y = y?.nextElementSibling;
  Expect.isNull(y);
}