LibTest/html/IFrameElement/firstChild_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.

// @dart = 2.9

/// @assertion final Node firstChild
/// The first child of this node.
/// @description Checks expected attribute values.

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

main() {
  IFrameElement iframe = new Element.html('<iframe>Content</iframe>');
  var ref = iframe.firstChild;
  Expect.equals("Content", ref.toString());

  var hr = new HRElement();
  iframe.insertBefore(hr, ref);
  Expect.equals(hr, iframe.firstChild);
}