106 lines
3.8 KiB
Java
106 lines
3.8 KiB
Java
/*
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* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 8292562
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* @summary Test transferTo and transferFrom when target is appending
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* @library /test/lib
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* @build jdk.test.lib.RandomFactory
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* @run main TransferToAppending
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* @key randomness
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*/
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.channels.FileChannel;
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import java.util.Random;
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import jdk.test.lib.RandomFactory;
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import static java.nio.file.StandardOpenOption.*;
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public class TransferToAppending {
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private static final int MIN_SIZE = 128;
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private static final int MAX_SIZE = 32768;
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private static final Random RND = RandomFactory.getRandom();
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public static void main(String... args) throws IOException {
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// Create files in size range [MIN_SIZE,MAX_SIZE)
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// filled with random bytes
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Path source = createFile("src");
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Path target = createFile("tgt");
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try (FileChannel src = FileChannel.open(source, READ, WRITE);
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FileChannel tgt = FileChannel.open(target, WRITE, APPEND);) {
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// Set source range to a subset of the source
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long size = Files.size(source);
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long position = RND.nextInt((int)size);
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long count = RND.nextInt((int)(size - position));
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long tgtSize = Files.size(target);
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// Transfer subrange to target
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long nbytes = src.transferTo(position, count, tgt);
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long expectedSize = tgtSize + nbytes;
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if (Files.size(target) != expectedSize) {
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String msg = String.format("Bad size: expected %d, actual %d%n",
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expectedSize, Files.size(target));
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throw new RuntimeException(msg);
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}
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tgt.close();
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// Load subrange of source
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ByteBuffer bufSrc = ByteBuffer.allocate((int)nbytes);
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src.read(bufSrc, position);
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try (FileChannel res = FileChannel.open(target, READ, WRITE)) {
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// Load appended range of target
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ByteBuffer bufTgt = ByteBuffer.allocate((int)nbytes);
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res.read(bufTgt, tgtSize);
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// Subranges of values should be equal
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if (bufSrc.mismatch(bufTgt) != -1) {
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throw new RuntimeException("Range of values unequal");
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}
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}
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} finally {
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Files.delete(source);
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Files.delete(target);
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}
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}
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private static Path createFile(String name) throws IOException {
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Path path = Files.createTempFile(name, ".dat");
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try (FileChannel fc = FileChannel.open(path, CREATE, READ, WRITE)) {
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int size = Math.max(RND.nextInt(MAX_SIZE), 128);
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byte[] b = new byte[size];
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RND.nextBytes(b);
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fc.write(ByteBuffer.wrap(b));
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}
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return path;
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}
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}
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