/*

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 * 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.

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 */

/* @test

 * @bug 4260284 8219196 8223254

 * @summary Test if DataOutputStream will overcount written field.

 * @requires (sun.arch.data.model == "64" & os.maxMemory >= 4g)

 * @run testng/othervm -Xmx4g WriteUTF

 */

import java.io.ByteArrayOutputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import java.io.UTFDataFormatException;

import org.testng.annotations.Test;

public class WriteUTF {

    @Test

    public static void overcountWrittenField() throws IOException {

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        DataOutputStream dos = new DataOutputStream(baos);

        dos.writeUTF("Hello, World!");  // 15

        dos.flush();

        if  (baos.size() != dos.size())

            throw new RuntimeException("Miscounted bytes in DataOutputStream.");

    }

    private static void writeUTF(int size) throws IOException {

        // this character gives 3 bytes when encoded using UTF-8

        String s = "\u0800".repeat(size);

        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        DataOutputStream dos = new DataOutputStream(bos);

        dos.writeUTF(s);

    }

    @Test(expectedExceptions = UTFDataFormatException.class)

    public void utfDataFormatException() throws IOException {

        writeUTF(1 << 16);

    }

    // Without 8219196 fix, throws ArrayIndexOutOfBoundsException instead of

    // expected UTFDataFormatException. Requires 4GB of heap (-Xmx4g) to run

    // without throwing an OutOfMemoryError.

    @Test(expectedExceptions = UTFDataFormatException.class)

    public void arrayIndexOutOfBoundsException() throws IOException {

        writeUTF(Integer.MAX_VALUE / 3 + 1);

    }

}