make HtmlDomTreeWalker serializable

rbri · rbri · commit ed2d44bbbce5 · 2025-01-22T08:35:59.000+01:00
diff --git a/src/main/java/org/htmlunit/html/HtmlDomTreeWalker.java b/src/main/java/org/htmlunit/html/HtmlDomTreeWalker.java
@@ -14,6 +14,8 @@
  */
 package org.htmlunit.html;
 
+import java.io.Serializable;
+
 import org.w3c.dom.DOMException;
 import org.w3c.dom.Node;
 import org.w3c.dom.traversal.NodeFilter;
@@ -30,7 +32,7 @@
  * @author Ahmed Ashour
  * @author Ronald Brill
  */
-public class HtmlDomTreeWalker {
+public class HtmlDomTreeWalker implements Serializable {
 
     private final DomNode root_;
     private DomNode currentNode_;
diff --git a/src/test/java/org/htmlunit/html/HtmlDomTreeWalkerTest.java b/src/test/java/org/htmlunit/html/HtmlDomTreeWalkerTest.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2002-2025 Gargoyle Software Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.htmlunit.html;
+
+import org.apache.commons.lang3.SerializationUtils;
+import org.htmlunit.SimpleWebTestCase;
+import org.htmlunit.junit.BrowserRunner;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Tests for {@link HtmlDomTreeWalker}.
+ *
+ * @author Ronald Brill
+ */
+@RunWith(BrowserRunner.class)
+public class HtmlDomTreeWalkerTest extends SimpleWebTestCase {
+
+    /**
+     * @throws Exception if an error occurs
+     */
+    @Test
+    public void serialization() throws Exception {
+        final String html = "<html><head></head><body>\n"
+                + "<div style='display:inline'>1</div><div style='display:inline'>2</div>\n"
+                + "</body></html>";
+
+        final HtmlPage page = loadPage(html);
+
+        final byte[] bytes = SerializationUtils.serialize(new HtmlDomTreeWalker(page.getBody(), 0, null, false));
+
+        final HtmlDomTreeWalker deserialized = (HtmlDomTreeWalker) SerializationUtils.deserialize(bytes);
+        Assert.assertEquals(page.getBody().getNodeName(), deserialized.getRoot().getNodeName());
+    }
+}
