/*

 * Copyright 1997 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 4017414

   @summary Check for correct implementation of PushbackInputStream.available

   */

import java.io.*;

public class Available{

    private static void dotest(PushbackInputStream in , int expected)

        throws Exception

    {

        int got = in.available();

        System.err.println("available must be " + expected + " , got : " + got);

        if (got != expected) {

            throw new

                RuntimeException("Unexpected number of bytes available in the PushBackInputStream");

        }

    }

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

        PushbackInputStream in = new

            PushbackInputStream(new ByteArrayInputStream(new byte[10]),5);

        dotest(in , 10);

        in.read();

        dotest(in , 9);

        in.unread(20);

        dotest(in , 10);

        in.unread(20);

        dotest(in , 11);

    }

}