--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/nio/file/etc/Exceptions.java	Fri Sep 10 16:36:48 2010 +0100
@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2010, 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 4313887 6881498
+ * @summary Miscellenous tests on exceptions in java.nio.file
+ */
+
+import java.nio.file.*;
+import java.io.*;
+import java.util.Objects;
+import java.lang.reflect.*;
+
+public class Exceptions {
+
+    public static void main(String[] args) throws Exception {
+        testFileSystemException();
+        testDirectoryIteratorException();
+    }
+
+    static void testFileSystemException() throws Exception {
+        String thisFile = "source";
+        String otherFile = "target";
+        String reason = "Access denied";
+
+        // getFile/getOtherFile
+        testFileSystemException(thisFile, otherFile, reason);
+        testFileSystemException(null, otherFile, reason);
+        testFileSystemException(thisFile, null, reason);
+        testFileSystemException(thisFile, otherFile, null);
+
+        // serialization
+        FileSystemException exc;
+        exc = new FileSystemException(thisFile, otherFile, reason);
+        exc = (FileSystemException)deserialize(serialize(exc));
+        if (!exc.getFile().equals(thisFile) || !exc.getOtherFile().equals(otherFile))
+            throw new RuntimeException("Exception not reconstituted completely");
+    }
+
+    static void testFileSystemException(String thisFile,
+                                        String otherFile,
+                                        String reason)
+    {
+        FileSystemException exc = new FileSystemException(thisFile, otherFile, reason);
+        if (!Objects.equals(thisFile, exc.getFile()))
+            throw new RuntimeException("getFile returned unexpected result");
+        if (!Objects.equals(otherFile, exc.getOtherFile()))
+            throw new RuntimeException("getOtherFile returned unexpected result");
+        if (!Objects.equals(reason, exc.getReason()))
+            throw new RuntimeException("getReason returned unexpected result");
+    }
+
+    static void testDirectoryIteratorException() throws Exception {
+        // NullPointerException
+        try {
+            new DirectoryIteratorException(null);
+            throw new RuntimeException("NullPointerException expected");
+        } catch (NullPointerException expected) { }
+
+        // serialization
+        DirectoryIteratorException exc;
+        exc = new DirectoryIteratorException(new IOException());
+        exc = (DirectoryIteratorException)deserialize(serialize(exc));
+        IOException ioe = exc.getCause();
+        if (ioe == null)
+            throw new RuntimeException("Cause should not be null");
+
+        // when deserializing then the cause should be an IOException
+        hackCause(exc, null);
+        try {
+            deserialize(serialize(exc));
+            throw new RuntimeException("InvalidObjectException expected");
+        } catch (InvalidObjectException expected) { }
+
+        hackCause(exc, new RuntimeException());
+        try {
+            deserialize(serialize(exc));
+            throw new RuntimeException("InvalidObjectException expected");
+        } catch (InvalidObjectException expected) { }
+    }
+
+
+    // Use reflection to set a Throwable's cause.
+    static void hackCause(Throwable t, Throwable cause)
+        throws NoSuchFieldException, IllegalAccessException
+    {
+        Field f = Throwable.class.getDeclaredField("cause");
+        f.setAccessible(true);
+        f.set(t, cause);
+    }
+
+    // Serialize the given object to a byte[]
+    static byte[] serialize(Object o) throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        ObjectOutputStream oos = new ObjectOutputStream(baos);
+        oos.writeObject(o);
+        oos.close();
+        return baos.toByteArray();
+    }
+
+    // Read an object from its serialized form
+    static Object deserialize(byte[] bytes)
+        throws IOException, ClassNotFoundException
+    {
+        ByteArrayInputStream in = new ByteArrayInputStream(bytes);
+        ObjectInputStream ois = new ObjectInputStream(in);
+        Object result = ois.readObject();
+        ois.close();
+        return result;
+    }
+}