252 lines
9.6 KiB
Java
252 lines
9.6 KiB
Java
/*
|
|
* Copyright (c) 2022, 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.InputStream;
|
|
import java.io.IOException;
|
|
import java.io.OutputStream;
|
|
import java.io.SequenceInputStream;
|
|
import java.util.Arrays;
|
|
import java.util.Random;
|
|
import java.util.concurrent.atomic.AtomicReference;
|
|
import java.util.function.Consumer;
|
|
import java.util.function.Supplier;
|
|
|
|
import org.testng.annotations.Test;
|
|
|
|
import jdk.test.lib.RandomFactory;
|
|
|
|
import static java.lang.String.format;
|
|
|
|
import static org.testng.Assert.assertEquals;
|
|
import static org.testng.Assert.assertNotEquals;
|
|
import static org.testng.Assert.assertThrows;
|
|
import static org.testng.Assert.assertTrue;
|
|
|
|
/*
|
|
* @test
|
|
* @library /test/lib
|
|
* @build jdk.test.lib.RandomFactory
|
|
* @run testng/othervm/timeout=180 TransferTo
|
|
* @bug 8297298
|
|
* @summary Tests whether java.io.SequenceInputStream.transferTo conforms to the
|
|
* InputStream.transferTo specification
|
|
* @key randomness
|
|
*/
|
|
public class TransferTo {
|
|
private static final int MIN_SIZE = 10_000;
|
|
private static final int MAX_SIZE_INCR = 100_000_000 - MIN_SIZE;
|
|
|
|
private static final int ITERATIONS = 10;
|
|
|
|
private static final Random RND = RandomFactory.getRandom();
|
|
|
|
/*
|
|
* Testing API compliance: input stream must throw NullPointerException
|
|
* when parameter "out" is null.
|
|
*/
|
|
@Test
|
|
public void testNullPointerException() throws Exception {
|
|
// factory for incoming data provider
|
|
InputStreamProvider inputStreamProvider = byteArrayInput();
|
|
|
|
// tests empty input stream
|
|
assertThrows(NullPointerException.class,
|
|
() -> inputStreamProvider.input().transferTo(null));
|
|
|
|
// tests single-byte input stream
|
|
assertThrows(NullPointerException.class,
|
|
() -> inputStreamProvider.input((byte) 1).transferTo(null));
|
|
|
|
// tests dual-byte input stream
|
|
assertThrows(NullPointerException.class,
|
|
() -> inputStreamProvider.input((byte) 1, (byte) 2).transferTo(null));
|
|
}
|
|
|
|
/*
|
|
* Testing API compliance: complete content of input stream must be
|
|
* transferred to output stream.
|
|
*/
|
|
@Test
|
|
public void testStreamContents() throws Exception {
|
|
// factory for incoming data provider
|
|
InputStreamProvider inputStreamProvider = byteArrayInput();
|
|
|
|
// factory for outgoing data recorder
|
|
OutputStreamProvider outputStreamProvider = byteArrayOutput();
|
|
|
|
// tests empty input stream
|
|
checkTransferredContents(inputStreamProvider,
|
|
outputStreamProvider, new byte[0]);
|
|
|
|
// tests input stream with a length between 1k and 4k
|
|
checkTransferredContents(inputStreamProvider,
|
|
outputStreamProvider, createRandomBytes(1024, 4096));
|
|
|
|
// tests input stream with several data chunks, as 16k is more than a
|
|
// single chunk can hold
|
|
checkTransferredContents(inputStreamProvider,
|
|
outputStreamProvider, createRandomBytes(16384, 16384));
|
|
|
|
// tests randomly chosen starting positions within source and
|
|
// target stream
|
|
for (int i = 0; i < ITERATIONS; i++) {
|
|
byte[] inBytes = createRandomBytes(MIN_SIZE, MAX_SIZE_INCR);
|
|
int posIn = RND.nextInt(inBytes.length);
|
|
int posOut = RND.nextInt(MIN_SIZE);
|
|
checkTransferredContents(inputStreamProvider,
|
|
outputStreamProvider, inBytes, posIn, posOut);
|
|
}
|
|
|
|
// tests reading beyond source EOF (must not transfer any bytes)
|
|
checkTransferredContents(inputStreamProvider,
|
|
outputStreamProvider, createRandomBytes(4096, 0), 4096, 0);
|
|
|
|
// tests writing beyond target EOF (must extend output stream)
|
|
checkTransferredContents(inputStreamProvider,
|
|
outputStreamProvider, createRandomBytes(4096, 0), 0, 4096);
|
|
}
|
|
|
|
/*
|
|
* Special case: Assert subsequent input stream is read when preceding stream already was MAX_VALUE long.
|
|
* Note: Not testing actual content as it requires multiple GBs of memory and long time.
|
|
*/
|
|
@Test
|
|
public void testHugeStream() throws Exception {
|
|
InputStream is1 = repeat(0, Long.MAX_VALUE);
|
|
InputStream is2 = repeat(0, 1);
|
|
assertNotEquals(is1.available(), 0);
|
|
assertNotEquals(is2.available(), 0);
|
|
SequenceInputStream sis = new SequenceInputStream(is1, is2);
|
|
OutputStream nos = OutputStream.nullOutputStream();
|
|
sis.transferTo(nos);
|
|
assertEquals(is1.available(), 0);
|
|
assertEquals(is2.available(), 0);
|
|
}
|
|
|
|
/*
|
|
* Produces an input stream that returns b count times.
|
|
* Builds a dysfunctional mock that solely implements
|
|
* available() and transferTo() particually,
|
|
* but fails with any other operation.
|
|
*/
|
|
private static InputStream repeat(int b, long count) {
|
|
return new InputStream() {
|
|
private long pos;
|
|
@Override
|
|
public int available() throws IOException {
|
|
return (int) Math.min(count - pos, Integer.MAX_VALUE);
|
|
}
|
|
@Override
|
|
public int read() throws IOException {
|
|
throw new UnsupportedOperationException();
|
|
}
|
|
@Override
|
|
public long transferTo(OutputStream os) throws IOException {
|
|
// skipping actual writing to os to spare time
|
|
pos += count;
|
|
return count;
|
|
}
|
|
};
|
|
}
|
|
|
|
/*
|
|
* Asserts that the transferred content is correct, i.e., compares the bytes
|
|
* actually transferred to those expected. The position of the input and
|
|
* output streams before the transfer are zero (BOF).
|
|
*/
|
|
private static void checkTransferredContents(InputStreamProvider inputStreamProvider,
|
|
OutputStreamProvider outputStreamProvider, byte[] inBytes) throws Exception {
|
|
checkTransferredContents(inputStreamProvider,
|
|
outputStreamProvider, inBytes, 0, 0);
|
|
}
|
|
|
|
/*
|
|
* Asserts that the transferred content is correct, i. e. compares the bytes
|
|
* actually transferred to those expected. The positions of the input and
|
|
* output streams before the transfer are provided by the caller.
|
|
*/
|
|
private static void checkTransferredContents(InputStreamProvider inputStreamProvider,
|
|
OutputStreamProvider outputStreamProvider, byte[] inBytes, int posIn,
|
|
int posOut) throws Exception {
|
|
AtomicReference<Supplier<byte[]>> recorder = new AtomicReference<>();
|
|
try (InputStream in = inputStreamProvider.input(inBytes);
|
|
OutputStream out = outputStreamProvider.output(recorder::set)) {
|
|
// skip bytes until starting position
|
|
in.skipNBytes(posIn);
|
|
out.write(new byte[posOut]);
|
|
|
|
long reported = in.transferTo(out);
|
|
int count = inBytes.length - posIn;
|
|
|
|
assertEquals(reported, count,
|
|
format("reported %d bytes but should report %d", reported, count));
|
|
|
|
byte[] outBytes = recorder.get().get();
|
|
assertTrue(Arrays.equals(inBytes, posIn, posIn + count,
|
|
outBytes, posOut, posOut + count),
|
|
format("inBytes.length=%d, outBytes.length=%d", count, outBytes.length));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Creates an array of random size (between min and min + maxRandomAdditive)
|
|
* filled with random bytes
|
|
*/
|
|
private static byte[] createRandomBytes(int min, int maxRandomAdditive) {
|
|
byte[] bytes = new byte[min +
|
|
(maxRandomAdditive == 0 ? 0 : RND.nextInt(maxRandomAdditive))];
|
|
RND.nextBytes(bytes);
|
|
return bytes;
|
|
}
|
|
|
|
private interface InputStreamProvider {
|
|
InputStream input(byte... bytes) throws Exception;
|
|
}
|
|
|
|
private interface OutputStreamProvider {
|
|
OutputStream output(Consumer<Supplier<byte[]>> spy) throws Exception;
|
|
}
|
|
|
|
private static InputStreamProvider byteArrayInput() {
|
|
return bytes -> {
|
|
InputStream is1 = new ByteArrayInputStream(bytes, 0, bytes.length / 2);
|
|
InputStream is2 = new ByteArrayInputStream(bytes, bytes.length / 2, bytes.length);
|
|
return new SequenceInputStream(is1, is2);
|
|
};
|
|
}
|
|
|
|
private static OutputStreamProvider byteArrayOutput() {
|
|
return new OutputStreamProvider() {
|
|
@Override
|
|
public OutputStream output(Consumer<Supplier<byte[]>> spy) {
|
|
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
|
|
spy.accept(outputStream::toByteArray);
|
|
return outputStream;
|
|
}
|
|
};
|
|
}
|
|
|
|
}
|