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/*
* 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);
int off = size < 2 ? 0 : random.nextInt(size / 2);
int len = size - off < 1 ? 0 : random.nextInt(size - off);
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");
}
}
}
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