/*

 * Copyright (c) 2018, 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.

 */

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.util.Arrays;

import java.util.Objects;

import java.util.Random;

import jdk.test.lib.RandomFactory;

/* @test

 * @library /test/lib

 * @build jdk.test.lib.RandomFactory

 * @run main ReadAllReadNTransferTo

 * @bug 8180451

 * @summary Verify ByteArrayInputStream readAllBytes, readNBytes, and transferTo

 * @key randomness

 */

public class ReadAllReadNTransferTo {

    private static final int SIZE = 0x4d4d;

    private static Random random = RandomFactory.getRandom();

    public static void main(String... args) throws IOException {

        byte[] buf = new byte[SIZE];

        random.nextBytes(buf);

        int position = random.nextInt(SIZE/2);

        int size = random.nextInt(SIZE - position);

        ByteArrayInputStream bais =

            new ByteArrayInputStream(buf, position, size);

        byte[] bN = new byte[off + len];

        if (bais.readNBytes(bN, off, len) != len) {

            throw new RuntimeException("readNBytes return value");

        }

        if (!Arrays.equals(bN, off, off + len,

            buf, position, position + len)) {

            throw new RuntimeException("readNBytes content");

        }

        byte[] bAll = bais.readAllBytes();

        Objects.requireNonNull(bAll, "readAllBytes return value");

        if (bAll.length != size - len) {

            throw new RuntimeException("readAllBytes return value length");

        }

        if (!Arrays.equals(bAll, 0, bAll.length,

            buf, position + len, position + len + bAll.length)) {

            throw new RuntimeException("readAllBytes content");

        }

        // XXX transferTo()

        bais = new ByteArrayInputStream(buf);

        ByteArrayOutputStream baos = new ByteArrayOutputStream(buf.length);

        if (bais.transferTo(baos) != buf.length) {

            throw new RuntimeException("transferTo return value length");

        }

        if (!Arrays.equals(buf, baos.toByteArray())) {

            throw new RuntimeException("transferTo content");

        }

    }

}