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/*
* Copyright (c) 2016, 2017, 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.
*/
/* @test
* @library /test/lib
* @build jdk.test.lib.RandomFactory
* @run main TestAvailable
* @bug 7031075 8161426
* @summary Make sure that available() method behaves as expected.
* @key randomness
*/
import java.io.*;
import java.util.Random;
import java.util.zip.*;
import jdk.test.lib.RandomFactory;
public class TestAvailable {
public static void main(String args[]) throws Throwable {
Random r = RandomFactory.getRandom();
for (int n = 0; n < 10; n++) {
byte[] src = new byte[r.nextInt(100) + 1];
r.nextBytes(src);
// test InflaterInputStream
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try (DeflaterOutputStream dos = new DeflaterOutputStream(baos)) {
dos.write(src);
}
try (InflaterInputStream iis = new InflaterInputStream(
new ByteArrayInputStream(baos.toByteArray()))) {
test(iis, src);
}
// test GZIPInputStream
baos = new ByteArrayOutputStream();
try (GZIPOutputStream dos = new GZIPOutputStream(baos)) {
dos.write(src);
}
try (GZIPInputStream gis = new GZIPInputStream(
new ByteArrayInputStream(baos.toByteArray()))) {
test(gis, src);
}
}
}
private static void test(InputStream is, byte[] expected) throws IOException {
int cnt = 0;
do {
int available = is.available();
if (available > 0) {
int b = is.read();
if (b == -1) {
throw new RuntimeException("available() > 0, read() == -1 : failed!");
}
if (expected[cnt++] != (byte)b) {
throw new RuntimeException("read() : failed!");
}
} else if (available == 0) {
if (is.read() != -1) {
throw new RuntimeException("available() == 0, read() != -1 : failed!");
}
break;
} else {
throw new RuntimeException("available() < 0 : failed!");
}
} while (true);
if (cnt != expected.length) {
throw new RuntimeException("read : failed!");
}
}
}
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