/*

 * Copyright (c) 1998, 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 4101707

   @summary Test if fill() will behave correctly at EOF to

            allow file to grow.

*/

import java.io.*;

public class GrowAfterEOF {

    public static void main(String[] args) throws Exception {

        File input = new File(".", "TestEOFInput.txt");

        RandomAccessFile rf = new RandomAccessFile(input, "rw");

        try {

            BufferedReader r = new BufferedReader

                (new InputStreamReader(new FileInputStream(input)));

            try {

                // write something

                rf.writeBytes("a line");

                // read till the end of file

                while (r.readLine() != null);

                // append to the end of the file

                rf.seek(rf.length());

                rf.writeBytes("new line");

                // now try to read again

                boolean readMore = false;

                while (r.readLine() != null) {

                    readMore = true;

                }

                if (!readMore) {

                    input.delete();

                    throw new Exception("Failed test: unable to read!");

                } else {

                    input.delete();

                }

            } finally {

                r.close();

            }

        } finally {

            rf.close();

        }

    }

}