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diff --git a/framework/src/ant/apache-ant-1.9.6/src/tests/junit/org/apache/tools/ant/util/DOMElementWriterTest.java b/framework/src/ant/apache-ant-1.9.6/src/tests/junit/org/apache/tools/ant/util/DOMElementWriterTest.java
new file mode 100644
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--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/tests/junit/org/apache/tools/ant/util/DOMElementWriterTest.java
@@ -0,0 +1,305 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You 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
+ *
+ *      http://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.apache.tools.ant.util;
+
+import org.junit.Test;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import java.io.IOException;
+import java.io.StringWriter;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests for org.apache.tools.ant.util.DOMElementWriter.
+ *
+ */
+public class DOMElementWriterTest {
+
+    private DOMElementWriter w = new DOMElementWriter();
+
+    @Test
+    public void testIsReference() {
+        assertTrue("", w.isReference(""));
+        assertTrue(" ", w.isReference(" "));
+        assertTrue(" ", w.isReference(" "));
+        assertTrue("&#A0;", !w.isReference("&#A0;"));
+        assertTrue("20;", !w.isReference("20;"));
+        assertTrue("&#20", !w.isReference("&#20"));
+        assertTrue(""", w.isReference("""));
+        assertTrue("'", w.isReference("'"));
+        assertTrue(">", w.isReference(">"));
+        assertTrue("<", w.isReference("<"));
+        assertTrue("&", w.isReference("&"));
+    }
+
+    @Test
+    public void testEncode() {
+        assertEquals("", w.encode(""));
+        assertEquals(" ", w.encode(" "));
+        assertEquals(" ", w.encode(" "));
+        assertEquals("&#A0;", w.encode("&#A0;"));
+        assertEquals("20;", w.encode("20;"));
+        assertEquals("&#20", w.encode("&#20"));
+        assertEquals(""", w.encode("""));
+        assertEquals("'", w.encode("'"));
+        assertEquals(">", w.encode(">"));
+        assertEquals("<", w.encode("<"));
+        assertEquals("&", w.encode("&"));
+        assertEquals(""", w.encode("\""));
+        assertEquals("&lt;", w.encode("<"));
+        assertEquals("&amp;", w.encode("&"));
+        assertEquals("", w.encode("\u0017"));
+        assertEquals("\r\n\t", w.encode("\r\n\t"));
+    }
+
+    @Test
+    public void testEncodeAttributeValue() {
+        assertEquals("&amp;#20;", w.encodeAttributeValue("&#20;"));
+        assertEquals("&amp;#x20;", w.encodeAttributeValue("&#x20;"));
+        assertEquals("&amp;#xA0;", w.encodeAttributeValue("&#xA0;"));
+        assertEquals("&amp;#A0;", w.encodeAttributeValue("&#A0;"));
+        assertEquals("20;", w.encodeAttributeValue("20;"));
+        assertEquals("&amp;#20", w.encodeAttributeValue("&#20"));
+        assertEquals("&amp;quot;", w.encodeAttributeValue("&quot;"));
+        assertEquals("&amp;apos;", w.encodeAttributeValue("&apos;"));
+        assertEquals("&amp;gt;", w.encodeAttributeValue("&gt;"));
+        assertEquals("&amp;lt;", w.encodeAttributeValue("&lt;"));
+        assertEquals("&amp;amp;", w.encodeAttributeValue("&amp;"));
+        assertEquals("&quot;", w.encodeAttributeValue("\""));
+        assertEquals("&lt;", w.encodeAttributeValue("<"));
+        assertEquals("&amp;", w.encodeAttributeValue("&"));
+        assertEquals("", w.encodeAttributeValue("\u0017"));
+        assertEquals("&#xd;&#xa;&#x9;", w.encodeAttributeValue("\r\n\t"));
+    }
+
+    @Test
+    public void testAttributeWithWhitespace() throws IOException {
+        Document d = DOMUtils.newDocument();
+        Element root = d.createElement("root");
+        root.setAttribute("foo", "bar\nbaz");
+        StringWriter sw = new StringWriter();
+        DOMElementWriter w = new DOMElementWriter();
+        w.write(root, sw, 0, "  ");
+        assertEquals("<root foo=\"bar&#xa;baz\" />" + StringUtils.LINE_SEP,
+                     sw.toString());
+    }
+
+    @Test
+    public void testEncodeData() {
+        assertEquals("&#20;\"20;&", w.encodedata("&#20;\"20;&"));
+        assertEquals("", w.encodedata("\u0017"));
+    }
+
+    @Test
+    public void testIsLegalCharacter() {
+        assertTrue("0x00", !w.isLegalCharacter('\u0000'));
+        assertTrue("0x09", w.isLegalCharacter('\t'));
+        assertTrue("0x0A", w.isLegalCharacter('\n'));
+        assertTrue("0x0C", w.isLegalCharacter('\r'));
+        assertTrue("0x1F", !w.isLegalCharacter('\u001F'));
+        assertTrue("0x20", w.isLegalCharacter('\u0020'));
+        assertTrue("0xD7FF", w.isLegalCharacter('\uD7FF'));
+        assertTrue("0xD800", !w.isLegalCharacter('\uD800'));
+        assertTrue("0xDFFF", !w.isLegalCharacter('\uDFFF'));
+        assertTrue("0xE000", w.isLegalCharacter('\uE000'));
+        assertTrue("0xFFFD", w.isLegalCharacter('\uFFFD'));
+        assertTrue("0xFFFE", !w.isLegalCharacter('\uFFFE'));
+    }
+
+    @Test
+    public void testCDATAEndEncoding() {
+        assertEquals("]>", w.encodedata("]>"));
+        assertEquals("]]", w.encodedata("]]"));
+        assertEquals("]]]]><![CDATA[>", w.encodedata("]]>"));
+        assertEquals("]]]]><![CDATA[>A", w.encodedata("]]>A"));
+        assertEquals("A]]]]><![CDATA[>", w.encodedata("A]]>"));
+        assertEquals("A]]]]><![CDATA[>A", w.encodedata("A]]>A"));
+        assertEquals("A]]]]><![CDATA[>B]]]]><![CDATA[>C",
+                     w.encodedata("A]]>B]]>C"));
+    }
+
+    @Test
+    public void testNoAdditionalWhiteSpaceForText() throws IOException {
+        Document d = DOMUtils.newDocument();
+        Element root = d.createElement("root");
+        DOMUtils.appendTextElement(root, "textElement", "content");
+
+        StringWriter sw = new StringWriter();
+        DOMElementWriter w = new DOMElementWriter();
+        w.write(root, sw, 0, "  ");
+        assertEquals("<root>" + StringUtils.LINE_SEP
+                     + "  <textElement>content</textElement>"
+                     + StringUtils.LINE_SEP
+                     + "</root>" + StringUtils.LINE_SEP,
+                     sw.toString());
+    }
+
+    @Test
+    public void testNoAdditionalWhiteSpaceForCDATA() throws IOException {
+        Document d = DOMUtils.newDocument();
+        Element root = d.createElement("root");
+        DOMUtils.appendCDATAElement(root, "cdataElement", "content");
+
+        StringWriter sw = new StringWriter();
+        DOMElementWriter w = new DOMElementWriter();
+        w.write(root, sw, 0, "  ");
+        assertEquals("<root>" + StringUtils.LINE_SEP
+                     + "  <cdataElement><![CDATA[content]]></cdataElement>"
+                     + StringUtils.LINE_SEP
+                     + "</root>" + StringUtils.LINE_SEP,
+                     sw.toString());
+    }
+
+    @Test
+    public void testNoAdditionalWhiteSpaceForEmptyElement() throws IOException {
+        Document d = DOMUtils.newDocument();
+        Element root = d.createElement("root");
+        DOMUtils.createChildElement(root, "emptyElement");
+
+        StringWriter sw = new StringWriter();
+        DOMElementWriter w = new DOMElementWriter();
+        w.write(root, sw, 0, "  ");
+        assertEquals("<root>" + StringUtils.LINE_SEP
+                     //                     + "  <emptyElement></emptyElement>"
+                     + "  <emptyElement />"
+                     + StringUtils.LINE_SEP
+                     + "</root>" + StringUtils.LINE_SEP,
+                     sw.toString());
+    }
+
+    @Test
+    public void testNoNSPrefixByDefault() throws IOException {
+        Document d = DOMUtils.newDocument();
+        Element root = d.createElementNS("urn:foo", "root");
+        root.setAttributeNS("urn:foo2", "bar", "baz");
+
+        StringWriter sw = new StringWriter();
+        DOMElementWriter w = new DOMElementWriter();
+        w.write(root, sw, 0, "  ");
+        assertEquals("<root bar=\"baz\" />"
+                     + StringUtils.LINE_SEP, sw.toString());
+    }
+
+    @Test
+    public void testNSOnElement() throws IOException {
+        Document d = DOMUtils.newDocument();
+        Element root = d.createElementNS("urn:foo", "root");
+        root.setAttributeNS("urn:foo2", "bar", "baz");
+
+        StringWriter sw = new StringWriter();
+        DOMElementWriter w =
+            new DOMElementWriter(false,
+                                 DOMElementWriter.XmlNamespacePolicy
+                                 .ONLY_QUALIFY_ELEMENTS);
+        w.write(root, sw, 0, "  ");
+        assertEquals("<root bar=\"baz\" xmlns=\"urn:foo\" />"
+                     + StringUtils.LINE_SEP, sw.toString());
+    }
+
+    @Test
+    public void testNSPrefixOnAttribute() throws IOException {
+        Document d = DOMUtils.newDocument();
+        Element root = d.createElementNS("urn:foo", "root");
+        root.setAttributeNS("urn:foo2", "bar", "baz");
+
+        StringWriter sw = new StringWriter();
+        DOMElementWriter w =
+            new DOMElementWriter(false,
+                                 DOMElementWriter.XmlNamespacePolicy
+                                 .QUALIFY_ALL);
+        w.write(root, sw, 0, "  ");
+        assertEquals("<root ns0:bar=\"baz\" xmlns=\"urn:foo\""
+                     + " xmlns:ns0=\"urn:foo2\" />"
+                     + StringUtils.LINE_SEP, sw.toString());
+    }
+
+    @Test
+    public void testNSPrefixOnAttributeEvenWithoutElement() throws IOException {
+        Document d = DOMUtils.newDocument();
+        Element root = d.createElementNS("urn:foo", "root");
+        root.setAttributeNS("urn:foo2", "bar", "baz");
+
+        StringWriter sw = new StringWriter();
+        DOMElementWriter w =
+            new DOMElementWriter(false,
+                                 new DOMElementWriter.XmlNamespacePolicy(false,
+                                                                         true)
+                                 );
+        w.write(root, sw, 0, "  ");
+        assertEquals("<root ns0:bar=\"baz\" xmlns:ns0=\"urn:foo2\" />"
+                     + StringUtils.LINE_SEP, sw.toString());
+    }
+
+    @Test
+    public void testNSGetsReused() throws IOException {
+        Document d = DOMUtils.newDocument();
+        Element root = d.createElementNS("urn:foo", "root");
+        Element child = d.createElementNS("urn:foo", "child");
+        root.appendChild(child);
+        StringWriter sw = new StringWriter();
+        DOMElementWriter w =
+            new DOMElementWriter(false,
+                                 DOMElementWriter.XmlNamespacePolicy
+                                 .ONLY_QUALIFY_ELEMENTS);
+        w.write(root, sw, 0, "  ");
+        assertEquals("<root xmlns=\"urn:foo\">"
+                     + StringUtils.LINE_SEP
+                     + "  <child />"
+                     + StringUtils.LINE_SEP
+                     + "</root>"
+                     + StringUtils.LINE_SEP, sw.toString());
+    }
+
+    @Test
+    public void testNSGoesOutOfScope() throws IOException {
+        Document d = DOMUtils.newDocument();
+        Element root = d.createElementNS("urn:foo", "root");
+        Element child = d.createElementNS("urn:foo2", "child");
+        root.appendChild(child);
+        Element child2 = d.createElementNS("urn:foo2", "child");
+        root.appendChild(child2);
+        Element grandChild = d.createElementNS("urn:foo2", "grandchild");
+        child2.appendChild(grandChild);
+        Element child3 = d.createElementNS("urn:foo2", "child");
+        root.appendChild(child3);
+        StringWriter sw = new StringWriter();
+        DOMElementWriter w =
+            new DOMElementWriter(false,
+                                 DOMElementWriter.XmlNamespacePolicy
+                                 .ONLY_QUALIFY_ELEMENTS);
+        w.write(root, sw, 0, "  ");
+        assertEquals("<root xmlns=\"urn:foo\">"
+                     + StringUtils.LINE_SEP
+                     + "  <ns0:child xmlns:ns0=\"urn:foo2\" />"
+                     + StringUtils.LINE_SEP
+                     + "  <ns1:child xmlns:ns1=\"urn:foo2\">"
+                     + StringUtils.LINE_SEP
+                     + "    <ns1:grandchild />"
+                     + StringUtils.LINE_SEP
+                     + "  </ns1:child>"
+                     + StringUtils.LINE_SEP
+                     + "  <ns2:child xmlns:ns2=\"urn:foo2\" />"
+                     + StringUtils.LINE_SEP
+                      + "</root>"
+                     + StringUtils.LINE_SEP, sw.toString());
+    }
+}