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1   /*
2    * Copyright (c) 2002-2025 Gargoyle Software Inc.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * https://www.apache.org/licenses/LICENSE-2.0
8    *
9    * Unless required by applicable law or agreed to in writing, software
10   * distributed under the License is distributed on an "AS IS" BASIS,
11   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12   * See the License for the specific language governing permissions and
13   * limitations under the License.
14   */
15  package org.htmlunit.platform.dom.traversal;
16  
17  import org.htmlunit.WebDriverTestCase;
18  import org.htmlunit.html.HtmlHead;
19  import org.htmlunit.html.HtmlPage;
20  import org.junit.jupiter.api.Test;
21  import org.openqa.selenium.WebDriver;
22  import org.openqa.selenium.htmlunit.HtmlUnitDriver;
23  import org.w3c.dom.Node;
24  import org.w3c.dom.traversal.NodeFilter;
25  import org.w3c.dom.traversal.TreeWalker;
26  
27  /**
28   * Tests for {@link DomTreeWalker}.
29   *
30   * @author Ahmed Ashour
31   * @author Ronald Brill
32   */
33  public final class DomTreeWalkerTest extends WebDriverTestCase {
34  
35      /**
36       * @throws Exception if the test fails
37       */
38      @Test
39      public void firstChild() throws Exception {
40          final String html = DOCTYPE_HTML
41                  + "<html><head><script>\n"
42                  + "function test() {\n"
43                  + "}\n"
44                  + "</script></head>\n"
45                  + "<body onload='test()'>\n"
46                  + "  <form name='f1'>\n"
47                  + "    <input>\n"
48                  + "    <INPUT>\n"
49                  + "  </form>\n"
50                  + "</body></html>";
51  
52          final WebDriver driver = loadPage2(html);
53          if (driver instanceof HtmlUnitDriver) {
54              final HtmlPage page = (HtmlPage) getEnclosedPage();
55              final TreeWalker walker = new DomTreeWalker(page.getDocumentElement(), NodeFilter.SHOW_ALL, null, true);
56              final Node node = walker.firstChild();
57              assertTrue(node.getClass().getName(), node instanceof HtmlHead);
58          }
59      }
60  }