LibTest/html/Element/ownerDocument_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 Document ownerDocument
 * The document this node belongs to.
 * @description Checks ownerDocument of nested elements.
 */
import "dart:html";
import "../../../Utils/expect.dart";

main() {
  var x = document.body;
  if (x != null) {
    x.innerHtml = '<div><button>foo</button></div>';

    Expect.equals(document, x.ownerDocument, 'nest1');

    Expect.equals(document, x.firstChild?.ownerDocument, 'nest2');

    Expect.equals(document, x.firstChild?.firstChild?.ownerDocument, 'nest3');
  } else {
    Expect.fail("Body is null");
  }
}