--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/io/File/createTempFile/Patterns.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,71 @@
+/*
+ * Copyright 1998 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.
+ *
+ * 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.
+ */
+
+/* @test
+   @bug 4152178
+   @summary Check various temp-file prefix/suffix cases */
+
+import java.io.File;
+import java.io.IOException;
+
+public class Patterns {
+
+    static File dir = new File(".");
+
+    static void ckn(String prefix, String suffix) throws Exception {
+        try {
+            File f = File.createTempFile(prefix, suffix, dir);
+            f.deleteOnExit();
+        } catch (Exception x) {
+            if ((x instanceof IOException)
+                || (x instanceof NullPointerException)
+                || (x instanceof IllegalArgumentException)) {
+                System.err.println("\"" + prefix + "\", \"" + suffix
+                                   + "\" failed as expected: " + x.getMessage());
+                return;
+            }
+            throw x;
+        }
+        throw new Exception("\"" + prefix + "\", \"" + suffix
+                            + "\" should have failed");
+    }
+
+    static void cky(String prefix, String suffix) throws Exception {
+        File f = File.createTempFile(prefix, suffix, dir);
+        f.deleteOnExit();
+        System.err.println("\"" + prefix + "\", \"" + suffix
+                           + "\" --> " + f.getPath());
+    }
+
+    public static void main(String[] args) throws Exception {
+        ckn(null, null);
+        ckn("", null);
+        ckn("x", null);
+        ckn("xx", null);
+        cky("xxx", null);
+        cky("xxx", "");
+        cky("xxx", "y");
+        cky("xxx", ".y");
+    }
+
+}