diff -r 000000000000 -r 24b6c30fbf71 test/java/util/prefs/Preferences/XMLPreferencesTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/java/util/prefs/Preferences/XMLPreferencesTest.java	Wed Jun 24 17:29:29 2009 +0200
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2002-2006 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+
+import java.io.ByteArrayInputStream;
+import sun.util.xml.PrefsXmlSupport;
+
+import java.io.ByteArrayOutputStream;
+import java.util.prefs.Preferences;
+
+/** Checks whether reading and writing via standard DOM and simplified API
+ * results in same results.
+ *
+ * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ */
+public class XMLPreferencesTest {
+    private static PrefsXmlSupport FULL = new com.sun.xml.internal.PrefsXmlSupportImpl();
+    private static PrefsXmlSupport SIMPLE = new sun.util.xml.DefaultPrefsXmlSupport();
+
+
+    public static void main(String[] args) throws Exception {
+        XMLPreferencesTest test = new XMLPreferencesTest();
+        test.testCompareOutput();
+        test.testCompareInput();
+    }
+
+
+    public XMLPreferencesTest() {
+    }
+
+    public void testCompareOutput() throws Exception {
+        Preferences p = Preferences.userRoot().node("a/b/c");
+        p.put("ahoj", "simple");
+        p.putInt("kuk", 1);
+        p.putBoolean("multi", true);
+        p.node("child").putBoolean("data", false);
+        p.node("empty");
+        p.parent().putDouble("visible", 1.0);
+
+        ByteArrayOutputStream full = new ByteArrayOutputStream();
+        FULL.export(full, p, true);
+
+        ByteArrayOutputStream simple = new ByteArrayOutputStream();
+        SIMPLE.export(simple, p, true);
+        if (full.toString().equals(simple.toString())) {
+            // OK
+            System.err.println("OK: testCompareOutput");
+        } else {
+            assert false :
+                "Full version differs from simplified. Full:\n" + full + "\nSimple:\n" + simple;
+        }
+    }
+
+    public void testCompareInput() throws Exception {
+        /*
+        String text = "";
+
+        Properties p1 = new Properties();
+        {
+            ByteArrayInputStream is = new ByteArrayInputStream(text.getBytes("UTF-8"));
+            FULL.load(p1, is);
+        }
+
+        Properties p2 = new Properties();
+        {
+            ByteArrayInputStream is = new ByteArrayInputStream(text.getBytes("UTF-8"));
+            SIMPLE.load(p2, is);
+        }
+
+        assert p1.equals(p2) : "P1: " + p1 + "\nP2: " + p2;
+        System.err.println("OK: testCompareInput");
+         */
+    }
+
+}
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