diff --git a/openide.util/test/unit/src/org/openide/xml/XMLUtilTest.java b/openide.util/test/unit/src/org/openide/xml/XMLUtilTest.java
--- a/openide.util/test/unit/src/org/openide/xml/XMLUtilTest.java
+++ b/openide.util/test/unit/src/org/openide/xml/XMLUtilTest.java
@@ -49,6 +49,7 @@
 import java.io.StringReader;
 import java.lang.ref.Reference;
 import java.lang.ref.WeakReference;
+import java.util.List;
 import javax.xml.XMLConstants;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.transform.stream.StreamSource;
@@ -58,6 +59,7 @@
 import org.openide.util.test.TestFileUtils;
 import org.w3c.dom.CDATASection;
 import org.w3c.dom.Document;
+import org.w3c.dom.DocumentFragment;
 import org.w3c.dom.DocumentType;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
@@ -497,4 +499,142 @@
         assertGC("can collect resolver", resolverRef);
     }
 
+    public void testAppendChildElement() throws Exception {
+        Document doc = XMLUtil.parse(new InputSource(new StringReader("<root></root>")), false, true, null, null);
+        Element parent = doc.createElementNS("unittest", "parent");
+        Element newElement1 = doc.createElementNS("unittest", "new_element1");
+        Element newElement2 = doc.createElementNS("unittest", "new_element2");
+
+        XMLUtil.appendChildElement(parent, newElement1, new String[] { "new_element2", "new_element1" });
+        NodeList children = parent.getChildNodes();
+        assertEquals(1, children.getLength());
+
+        XMLUtil.appendChildElement(parent, newElement2, new String[] { "new_element2", "new_element1" });
+
+        children = parent.getChildNodes();
+        assertEquals(2, children.getLength());
+        Node firstChild = parent.getChildNodes().item(0);
+        Node secondChild = parent.getChildNodes().item(1);
+        assertEquals("new_element2", firstChild.getNodeName());
+        assertEquals("new_element1", secondChild.getNodeName());
+    }
+
+    public void testFindSubElements() throws Exception {
+        Document doc = XMLUtil.parse(new InputSource(new StringReader("<root> <child1></child1><child2/><!-- comment --><child3/></root>")),
+                false, true, null, null);
+
+        Element parent = doc.getDocumentElement();
+        assertEquals(5, parent.getChildNodes().getLength());
+        List<Element> subElements = XMLUtil.findSubElements(parent);
+        assertEquals(3, subElements.size());
+        Element firstChild = subElements.get(0);
+        Element secondChild = subElements.get(1);
+        Element thirdChild = subElements.get(2);
+
+        assertEquals("child1", firstChild.getNodeName());
+        assertEquals("child2", secondChild.getNodeName());
+        assertEquals("child3", thirdChild.getNodeName());
+
+        Document failureDoc = XMLUtil.parse(new InputSource(new StringReader("<root>Non whitespace<!-- comment --></root>")),
+            false, true, null, null);
+        Element failedParent = failureDoc.getDocumentElement();
+        try {
+            XMLUtil.findSubElements(failedParent);
+            fail("expected IAE");
+        } catch (IllegalArgumentException e) { }
+    }
+
+    public void testFindElement() throws Exception {
+        String xmlDoc = "<root> " +
+                        " <h:table xmlns:h=\"http://www.w3.org/TR/html4/\">" +
+                        " </h:table>" +
+                        " <f:table xmlns:f=\"http://www.w3schools.com/furniture\">" +
+                        " </f:table>" +
+                        " <dup/><dup/>" +
+                        "</root>";
+        
+        Document doc = XMLUtil.parse(new InputSource(new StringReader(xmlDoc)), false, true, null, null);
+        Element parent = doc.getDocumentElement();
+
+        Element noTable1 = XMLUtil.findElement(parent, "table", null);
+        assertNull(noTable1);
+
+        Element noTable2 = XMLUtil.findElement(parent, "table", "h");
+        assertNull(noTable2);
+
+        Element noTable3 = XMLUtil.findElement(parent, "table", "f");
+        assertNull(noTable3);
+
+        Element table1 = XMLUtil.findElement(parent, "table", "http://www.w3.org/TR/html4/");
+        assertNotNull(table1);
+
+        Element table2 = XMLUtil.findElement(parent, "table", "http://www.w3schools.com/furniture");
+        assertNotNull(table2);
+
+        try {
+            XMLUtil.findElement(parent, "dup", null);
+            fail("Expected IAE");
+        } catch (IllegalArgumentException e) { }
+    }
+
+    public void testFindText() throws Exception {
+        Document doc = XMLUtil.parse(new InputSource(new StringReader("<root>Text To Find<child></child></root>")),
+                false, true, null, null);
+
+        Element parent = doc.getDocumentElement();
+        String foundText = XMLUtil.findText(parent);
+
+        assertEquals("Text To Find", foundText);
+
+        String notFoundText = XMLUtil.findText(parent.getFirstChild());
+
+        assertNull(notFoundText);
+    }
+
+    public void testTranslateXML() throws Exception {
+        // don't add any whitespace to the first 3 nodes
+        String xmlDoc = "<root><table bgcolor='red'><tr>" +
+                        "   <td>Apples</td>" +
+                        "   <td>Bananas</td>" +
+                        "  </tr>" +
+                        " </table>" +
+                        "</root>";
+
+        Document doc = XMLUtil.parse(new InputSource(new StringReader(xmlDoc)), false, true, null, null);
+        Element parent = doc.getDocumentElement();
+
+        Element translated = XMLUtil.translateXML((Element) parent.getFirstChild(), "http://www.w3.org/TR/html4/");
+        assertEquals("http://www.w3.org/TR/html4/", translated.getNamespaceURI());
+        assertEquals(1, translated.getAttributes().getLength());
+
+        assertEquals("http://www.w3.org/TR/html4/", translated.getFirstChild().getNamespaceURI());
+        assertEquals(0, translated.getFirstChild().getAttributes().getLength());
+    }
+
+    public void testCopyDocument() throws Exception {
+        String srcXml = "<root><table bgcolor='red'><tr>" +
+                        "   <td>Apples</td>" +
+                        "   <td>Bananas</td>" +
+                        "  </tr>" +
+                        " </table>" +
+                        "</root>";
+
+        Document srcDoc = XMLUtil.parse(new InputSource(new StringReader(srcXml)), false, true, null, null);
+        Element srcRoot = srcDoc.getDocumentElement();
+
+        Document dstDoc = XMLUtil.parse(new InputSource(new StringReader("<dst_root/>")), false, true, null, null);
+
+        Element dstRoot = dstDoc.getDocumentElement();
+        XMLUtil.copyDocument(dstDoc, srcRoot, dstRoot, "http://www.w3.org/TR/html4/");
+//        XMLUtil.write(dstDoc, System.out, "UTF-8");
+
+        assertEquals(1, dstDoc.getChildNodes().getLength());
+        Element root = dstDoc.getDocumentElement();
+        Element firstChild = (Element) root.getFirstChild();
+
+        assertEquals("table", firstChild.getNodeName());
+        assertEquals("http://www.w3.org/TR/html4/", firstChild.getNamespaceURI());
+        assertEquals(1, firstChild.getAttributes().getLength());
+    }
+
 }