--- /dev/null	Mon Nov 17 20:34:35 2014
+++ new/test/javax/xml/jaxp/unittest/org/w3c/dom/ls/Bug6376823.java	Mon Nov 17 20:34:33 2014
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package org.w3c.dom.ls;
+
+import java.io.StringBufferInputStream;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.testng.Assert;
+import org.testng.annotations.Test;
+import org.w3c.dom.DOMConfiguration;
+import org.w3c.dom.DOMImplementation;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import org.w3c.dom.ls.DOMImplementationLS;
+import org.w3c.dom.ls.LSInput;
+import org.w3c.dom.ls.LSParser;
+import org.w3c.dom.ls.LSSerializer;
+import org.w3c.dom.ls.LSSerializerFilter;
+import org.w3c.dom.traversal.NodeFilter;
+
+/*
+ * @bug 6376823
+ * @summary Test LSSerializer works.
+ */
+public class Bug6376823 {
+
+    private static String XML_STRING = "<?xml version=\"1.0\"?><ROOT><ELEMENT1><CHILD1/><CHILD1><COC1/></CHILD1></ELEMENT1><ELEMENT2>test1<CHILD2/></ELEMENT2></ROOT>";
+    private static DOMImplementationLS implLS;
+
+    @Test
+    public void testStringSourceWithXmlDecl() {
+        String result = prepare(XML_STRING, true);
+        System.out.println("testStringSource: output: " + result);
+        Assert.assertTrue(result.indexOf("<?xml", 5) < 0, "XML Declaration expected in output");
+    }
+
+    private String prepare(String source, boolean xmlDeclFlag) {
+        Document startDoc = null;
+        DocumentBuilder domParser = null;
+        try {
+            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+            domParser = factory.newDocumentBuilder();
+        } catch (ParserConfigurationException e) {
+            e.printStackTrace();
+            Assert.fail("Exception occured: " + e.getMessage());
+        }
+
+        final StringBufferInputStream is = new StringBufferInputStream(XML_STRING);
+        try {
+            startDoc = domParser.parse(is);
+        } catch (Exception e) {
+            e.printStackTrace();
+            Assert.fail("Exception occured: " + e.getMessage());
+        }
+
+        DOMImplementation impl = startDoc.getImplementation();
+        implLS = (DOMImplementationLS) impl.getFeature("LS", "3.0");
+        LSParser parser = implLS.createLSParser(DOMImplementationLS.MODE_SYNCHRONOUS, "http://www.w3.org/2001/XMLSchema");
+
+        LSInput src = getXmlSource(source);
+
+        LSSerializer writer = implLS.createLSSerializer();
+
+        DOMConfiguration conf = writer.getDomConfig();
+        conf.setParameter("xml-declaration", Boolean.valueOf(xmlDeclFlag));
+
+        // set filter
+        writer.setFilter(new LSSerializerFilter() {
+            public short acceptNode(Node enode) {
+                return FILTER_ACCEPT;
+
+            }
+
+            public int getWhatToShow() {
+                return NodeFilter.SHOW_ALL;
+            }
+        });
+
+        Document doc = parser.parse(src);
+        return writer.writeToString(doc);
+    }
+
+    private LSInput getXmlSource(String xml1) {
+        LSInput src = implLS.createLSInput();
+        try {
+            src.setStringData(xml1);
+        } catch (Exception e) {
+            e.printStackTrace();
+            Assert.fail("Exception occured: " + e.getMessage());
+        }
+        return src;
+    }
+}