--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxp/test/javax/xml/jaxp/unittest/org/w3c/dom/Bug6521260.java	Tue Nov 18 12:01:27 2014 -0800
@@ -0,0 +1,73 @@
+/*
+ * 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;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+
+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.Document;
+import org.w3c.dom.Element;
+import org.xml.sax.SAXException;
+
+/*
+ * @bug 6521260
+ * @summary Test setAttributeNS doesn't result in an unsorted internal list of attributes.
+ */
+public class Bug6521260 {
+
+    @Test
+    public void test() throws ParserConfigurationException, SAXException, IOException {
+        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+        factory.setNamespaceAware(true);
+        DocumentBuilder builder = factory.newDocumentBuilder();
+
+        String docStr = "<system systemId='http://www.w3.org/2001/rddl/rddl-xhtml.dtd'" + " uri='/cache/data/xrc36316.bin'"
+                + " xmlns:xr='urn:oasis:names:tc:entity:xmlns:xml:catalog'" + " xr:systemId='http://www.w3.org/2001/rddl/rddl-xhtml.dtd'"
+                + " xmlns:NS1='http://xmlresolver.org/ns/catalog'" + " NS1:time='1170267571097'/>";
+
+        ByteArrayInputStream bais = new ByteArrayInputStream(docStr.getBytes());
+
+        Document doc = builder.parse(bais);
+
+        Element root = doc.getDocumentElement();
+
+        String systemId = root.getAttribute("systemId");
+
+        // Change the prefix on the "time" attribute so that the list would
+        // become unsorted
+        // before my fix to
+        // xml-xerces/java/src/com/sun/org/apache/xerces/internal/dom/ElementImpl.java
+        root.setAttributeNS("http://xmlresolver.org/ns/catalog", "xc:time", "100");
+
+        String systemId2 = root.getAttribute("systemId");
+
+        Assert.assertEquals(systemId, systemId2);
+    }
+}