229 lines
9.0 KiB
Java
229 lines
9.0 KiB
Java
/*
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* Copyright (c) 2021, 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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import static java.lang.String.format;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.nio.channels.Channels;
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import java.nio.channels.FileChannel;
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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.file.StandardOpenOption;
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import java.util.Arrays;
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import java.util.Random;
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import java.util.concurrent.atomic.AtomicReference;
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import java.util.function.Consumer;
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import java.util.function.Supplier;
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import jdk.test.lib.RandomFactory;
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/*
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* @test
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* @library /test/lib
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* @build jdk.test.lib.RandomFactory
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* @run main TransferTo
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* @bug 8265891
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* @summary tests whether sun.nio.ChannelInputStream.transferTo conforms to the
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* InputStream.transferTo contract defined in the javadoc
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* @key randomness
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*/
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public class TransferTo {
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private static final int MIN_SIZE = 10_000;
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private static final int MAX_SIZE_INCR = 100_000_000 - MIN_SIZE;
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private static final int ITERATIONS = 10;
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private static final Random RND = RandomFactory.getRandom();
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public static void main(String[] args) throws Exception {
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test(fileChannelInput(), fileChannelOutput());
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test(readableByteChannelInput(), defaultOutput());
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}
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private static void test(InputStreamProvider inputStreamProvider, OutputStreamProvider outputStreamProvider)
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throws Exception {
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testNullPointerException(inputStreamProvider);
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testStreamContents(inputStreamProvider, outputStreamProvider);
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}
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private static void testNullPointerException(InputStreamProvider inputStreamProvider) throws Exception {
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try (InputStream in = inputStreamProvider.input()) {
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assertThrowsNPE(() -> in.transferTo(null), "out");
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}
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try (InputStream in = inputStreamProvider.input((byte) 1)) {
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assertThrowsNPE(() -> in.transferTo(null), "out");
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}
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try (InputStream in = inputStreamProvider.input((byte) 1, (byte) 2)) {
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assertThrowsNPE(() -> in.transferTo(null), "out");
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}
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}
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private static void testStreamContents(InputStreamProvider inputStreamProvider,
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OutputStreamProvider outputStreamProvider) throws Exception {
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checkTransferredContents(inputStreamProvider, outputStreamProvider, new byte[0]);
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checkTransferredContents(inputStreamProvider, outputStreamProvider, createRandomBytes(1024, 4096));
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// to span through several batches
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checkTransferredContents(inputStreamProvider, outputStreamProvider, createRandomBytes(16384, 16384));
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// randomly chosen starting positions within source and target
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for (int i = 0; i < ITERATIONS; i++) {
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byte[] inBytes = createRandomBytes(MIN_SIZE, MAX_SIZE_INCR);
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int posIn = RND.nextInt(inBytes.length);
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int posOut = RND.nextInt(MIN_SIZE);
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checkTransferredContents(inputStreamProvider, outputStreamProvider, inBytes, posIn, posOut);
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}
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// beyond source EOF
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checkTransferredContents(inputStreamProvider, outputStreamProvider, createRandomBytes(4096, 0), 4096, 0);
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// beyond target EOF
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checkTransferredContents(inputStreamProvider, outputStreamProvider, createRandomBytes(4096, 0), 0, 4096);
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}
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private static void checkTransferredContents(InputStreamProvider inputStreamProvider,
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OutputStreamProvider outputStreamProvider, byte[] inBytes) throws Exception {
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checkTransferredContents(inputStreamProvider, outputStreamProvider, inBytes, 0, 0);
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}
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private static void checkTransferredContents(InputStreamProvider inputStreamProvider,
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OutputStreamProvider outputStreamProvider, byte[] inBytes, int posIn, int posOut) throws Exception {
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AtomicReference<Supplier<byte[]>> recorder = new AtomicReference<>();
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try (InputStream in = inputStreamProvider.input(inBytes);
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OutputStream out = outputStreamProvider.output(recorder::set)) {
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// skip bytes till starting position
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in.skipNBytes(posIn);
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out.write(new byte[posOut]);
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long reported = in.transferTo(out);
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int count = inBytes.length - posIn;
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if (reported != count)
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throw new AssertionError(
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format("reported %d bytes but should report %d", reported, count));
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byte[] outBytes = recorder.get().get();
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if (!Arrays.equals(inBytes, posIn, posIn + count, outBytes, posOut, posOut + count))
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throw new AssertionError(
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format("inBytes.length=%d, outBytes.length=%d", count, outBytes.length));
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}
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}
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private static byte[] createRandomBytes(int min, int maxRandomAdditive) {
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byte[] bytes = new byte[min + (maxRandomAdditive == 0 ? 0 : RND.nextInt(maxRandomAdditive))];
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RND.nextBytes(bytes);
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return bytes;
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}
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private interface InputStreamProvider {
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InputStream input(byte... bytes) throws Exception;
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}
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private interface OutputStreamProvider {
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OutputStream output(Consumer<Supplier<byte[]>> spy) throws Exception;
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}
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private static OutputStreamProvider defaultOutput() {
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return new OutputStreamProvider() {
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@Override
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public OutputStream output(Consumer<Supplier<byte[]>> spy) {
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ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
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spy.accept(outputStream::toByteArray);
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return outputStream;
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}
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};
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}
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private static InputStreamProvider fileChannelInput() {
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return new InputStreamProvider() {
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@Override
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public InputStream input(byte... bytes) throws Exception {
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Path path = Files.createTempFile(null, null);
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Files.write(path, bytes);
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FileChannel fileChannel = FileChannel.open(path);
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return Channels.newInputStream(fileChannel);
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}
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};
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}
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private static InputStreamProvider readableByteChannelInput() {
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return new InputStreamProvider() {
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@Override
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public InputStream input(byte... bytes) throws Exception {
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return Channels.newInputStream(Channels.newChannel(new ByteArrayInputStream(bytes)));
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}
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};
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}
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private static OutputStreamProvider fileChannelOutput() {
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return new OutputStreamProvider() {
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public OutputStream output(Consumer<Supplier<byte[]>> spy) throws Exception {
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Path path = Files.createTempFile(null, null);
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FileChannel fileChannel = FileChannel.open(path, StandardOpenOption.WRITE);
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spy.accept(() -> {
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try {
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return Files.readAllBytes(path);
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} catch (IOException e) {
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throw new AssertionError("Failed to verify output file", e);
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}
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});
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return Channels.newOutputStream(fileChannel);
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}
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};
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}
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public interface Thrower {
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public void run() throws Throwable;
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}
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public static void assertThrowsNPE(Thrower thrower, String message) {
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assertThrows(thrower, NullPointerException.class, message);
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}
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public static <T extends Throwable> void assertThrows(Thrower thrower, Class<T> throwable, String message) {
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Throwable thrown;
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try {
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thrower.run();
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thrown = null;
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} catch (Throwable caught) {
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thrown = caught;
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}
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if (!throwable.isInstance(thrown)) {
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String caught = thrown == null ? "nothing" : thrown.getClass().getCanonicalName();
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throw new AssertionError(format("Expected to catch %s, but caught %s", throwable, caught), thrown);
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}
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if (thrown != null && !message.equals(thrown.getMessage())) {
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throw new AssertionError(
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format("Expected exception message to be '%s', but it's '%s'", message, thrown.getMessage()));
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}
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}
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}
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