/*

 * 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

 * @summary Verify that if InputStream.read returns 0 we throw an exception.

 * @bug 4684515

 */

import java.io.*;

public class ReadZero {

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

        ReadZero r = new ReadZero();

        r.testInputStream();

    }

    private void testInputStream() throws IOException {

        File f = new File(System.getProperty("test.src", "."), "ReadZero.java");

        InputStream is = new FileInputStream(f) {

            public int read(byte [] b, int off, int len) {

                System.out.println("FileInputStream.read");

                return 0;

            }

        };

        try {

            is.read(new byte[1], 0, 1); // ok

            InputStreamReader isr = new InputStreamReader(is);

            try {

                int res = isr.read(new char[1], 0, 1);

            } catch (IOException x) {

                System.out.println("IOException caught");

                return;

            }

        } finally {

            is.close();

        }

        throw new RuntimeException("IOException not thrown");

    }

}