--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/sun/security/krb5/auto/ReplayCacheExpunge.java	Fri Jun 21 18:26:13 2013 +0800
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2013, 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.
+*/
+
+/*
+ * @test
+ * @bug 8001326
+ * @run main/othervm ReplayCacheExpunge 16
+ * @run main/othervm/fail ReplayCacheExpunge 15
+ * @summary when number of expired entries minus number of good entries
+ * is more than 30, expunge occurs, and expired entries are forgotten.
+*/
+
+import java.util.Random;
+import sun.security.krb5.internal.KerberosTime;
+import sun.security.krb5.internal.ReplayCache;
+import sun.security.krb5.internal.rcache.AuthTimeWithHash;
+
+public class ReplayCacheExpunge {
+    static final String client = "dummy@REALM";
+    static final String server = "server/localhost@REALM";
+    static final Random rand = new Random();
+
+    public static void main(String[] args) throws Exception {
+        int count = Integer.parseInt(args[0]);
+        ReplayCache cache = ReplayCache.getInstance("dfl:./");
+        AuthTimeWithHash a1 =
+                new AuthTimeWithHash(client, server, time(-400), 0, hash("1"));
+        AuthTimeWithHash a2 =
+                new AuthTimeWithHash(client, server, time(0), 0, hash("4"));
+        KerberosTime now = new KerberosTime(time(0)*1000L);
+        KerberosTime then = new KerberosTime(time(-300)*1000L);
+
+        // Once upon a time, we added a lot of events
+        for (int i=0; i<count; i++) {
+            a1 = new AuthTimeWithHash(client, server, time(-400), 0, hash(""));
+            cache.checkAndStore(then, a1);
+        }
+
+        // Now, we add a new one. If some conditions hold, the old ones
+        // will be expunged.
+        cache.checkAndStore(now, a2);
+
+        // and adding an old one will not trigger any error
+        cache.checkAndStore(now, a1);
+    }
+
+    private static String hash(String s) {
+        char[] data = new char[16];
+        for (int i=0; i<16; i++) {
+            if (i < s.length()) data[i] = s.charAt(i);
+            else data[i] = (char)('0' + rand.nextInt(10));
+        }
+        return new String(data);
+    }
+
+    private static int time(int x) {
+        return (int)(System.currentTimeMillis()/1000) + x;
+    }
+}