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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.htmlunit.junit.BrowserRunner;
21  import org.junit.Test;
22  import org.junit.runner.RunWith;
23  import org.openqa.selenium.WebDriver;
24  import org.openqa.selenium.htmlunit.HtmlUnitDriver;
25  import org.w3c.dom.Node;
26  import org.w3c.dom.traversal.NodeFilter;
27  import org.w3c.dom.traversal.TreeWalker;
28  
29  /**
30   * Tests for {@link DomTreeWalker}.
31   *
32   * @author Ahmed Ashour
33   * @author Ronald Brill
34   */
35  @RunWith(BrowserRunner.class)
36  public final class DomTreeWalkerTest extends WebDriverTestCase {
37  
38      /**
39       * @throws Exception if the test fails
40       */
41      @Test
42      public void firstChild() throws Exception {
43          final String html = DOCTYPE_HTML
44                  + "<html><head><script>\n"
45                  + "function test() {\n"
46                  + "}\n"
47                  + "</script></head>\n"
48                  + "<body onload='test()'>\n"
49                  + "  <form name='f1'>\n"
50                  + "    <input>\n"
51                  + "    <INPUT>\n"
52                  + "  </form>\n"
53                  + "</body></html>";
54  
55          final WebDriver driver = loadPage2(html);
56          if (driver instanceof HtmlUnitDriver) {
57              final HtmlPage page = (HtmlPage) getEnclosedPage();
58              final TreeWalker walker = new DomTreeWalker(page.getDocumentElement(), NodeFilter.SHOW_ALL, null, true);
59              final Node node = walker.firstChild();
60              assertTrue(node.getClass().getName(), node instanceof HtmlHead);
61          }
62      }
63  }