/*
* Copyright (c) 2006, 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
* @bug 4679743
* @summary Test basic functionality of DeflaterInputStream and InflaterOutputStream
* @key randomness
*/
import java.io.*;
import java.util.*;
import java.util.zip.*;
public class DeflateIn_InflateOut {
private static byte[] data = new byte[1024 * 1024];
private static ByteArrayInputStream bais;
private static DeflaterInputStream dis;
private static ByteArrayOutputStream baos;
private static InflaterOutputStream ios;
private static void reset() {
new Random(new Date().getTime()).nextBytes(data);
bais = new ByteArrayInputStream(data);
dis = new DeflaterInputStream(bais);
baos = new ByteArrayOutputStream();
ios = new InflaterOutputStream(baos);
}
/** Check byte arrays read/write. */
private static void ArrayReadWrite() throws Throwable {
byte[] buf = new byte[512];
reset();
check(dis.available() == 1);
for (;;) {
int len = dis.read(buf, 0, buf.length);
if (len < 0) {
break;
} else {
ios.write(buf, 0, len);
}
}
check(dis.available() == 0);
ios.close();
check(Arrays.equals(data, baos.toByteArray()));
}
/** Check byte arrays read, single byte write */
private static void ArrayReadByteWrite() throws Throwable {
byte[] buf = new byte[512];
reset();
for (;;) {
int len = dis.read(buf, 0, buf.length);
if (len <= 0) {
break;
} else {
for (int i = 0; i < len; i++) {
byte x = (byte) (buf[i] & 0xff);
ios.write(x);
}
}
}
check(dis.available() == 0);
ios.close();
check(Arrays.equals(data, baos.toByteArray()));
}
/** Check single byte read, byte array write.
* <p>
* Note that this test relies on the vaule from DeflaterInputStream.read()
* to determine when to stop reading.
*/
private static void ByteReadArrayWrite() throws Throwable {
byte[] buf = new byte[8192];
int off = 0;
reset();
int datum = dis.read();
while (datum != -1) {
if (off == 8192) {
ios.write(buf, 0, off);
off = 0;
}
buf[off++] = (byte) (datum & 0xff);
datum = dis.read();
}
if (off > 0) {
ios.write(buf, 0, off);
}
ios.close();
check(Arrays.equals(data, baos.toByteArray()));
}
/** Check single byte read/write.
* <p>
* Note that this test relies on DeflaterInputStream.available() to
* determine when to stop reading.
*/
private static void ByteReadByteWrite() throws Throwable {
byte[] buf = new byte[512];
boolean reachEOF = false;
reset();
while (dis.available() == 1) {
int datum = dis.read();
if (datum == -1) {
reachEOF = true;
} else {
if (datum < 0 || datum > 255) {
fail("datum out of range: " + datum);
}
ios.write(datum);
}
}
dis.close();
ios.close();
check(data[0] == baos.toByteArray()[0]);
}
/** Check skip(). */
private static void SkipBytes() throws Throwable {
byte[] buf = new byte[512];
int numReadable = 0;
// Count number of bytes that are read
reset();
check(dis.available() == 1);
for (;;) {
int count = dis.read(buf, 0, buf.length);
if (count < 0) {
break;
} else {
numReadable += count;
}
}
check(dis.available() == 0);
// Verify that skipping the first several bytes works.
reset();
int numNotSkipped = 0;
int numSkipBytes = 2053; // arbitrarily chosen prime
check(dis.skip(numSkipBytes) == numSkipBytes);
for (int i = 0; ; i++) {
int count = dis.read(buf, 0, buf.length);
if (count < 0) {
break;
} else {
numNotSkipped += count;
}
}
check(numNotSkipped + numSkipBytes == numReadable);
// Verify that skipping some bytes mid-stream works.
reset();
numNotSkipped = 0;
numSkipBytes = 8887; // arbitrarily chosen prime
for (int i = 0; ; i++) {
if (i == 13) { // Arbitrarily chosen
check(dis.skip(numSkipBytes) == numSkipBytes);
} else {
int count = dis.read(buf, 0, buf.length);
if (count < 0) {
break;
} else {
numNotSkipped += count;
}
}
}
check(numNotSkipped + numSkipBytes == numReadable);
// Verify that skipping the last N bytes works.
reset();
numNotSkipped = 0;
numSkipBytes = 6449; // arbitrarily chosen prime
for (int i = 0; ; i++) {
if (numNotSkipped + numSkipBytes > numReadable) {
numSkipBytes = numReadable - numNotSkipped;
check(dis.skip(numSkipBytes) == numSkipBytes);
check(dis.read(buf, 0, buf.length) == -1);
check(dis.available() == 0);
} else {
int count = dis.read(buf, 0, buf.length);
if (count < 0) {
break;
} else {
numNotSkipped += count;
}
}
}
check(numNotSkipped + numSkipBytes == numReadable);
}
public static void realMain(String[] args) throws Throwable {
ArrayReadWrite();
ArrayReadByteWrite();
ByteReadArrayWrite();
ByteReadByteWrite();
SkipBytes();
}
//--------------------- Infrastructure ---------------------------
static volatile int passed = 0, failed = 0;
static void pass() {passed++;}
static void fail() {failed++; Thread.dumpStack();}
static void fail(String msg) {System.out.println(msg); fail();}
static void unexpected(Throwable t) {failed++; t.printStackTrace();}
static void check(boolean cond) {if (cond) pass(); else fail();}
static void equal(Object x, Object y) {
if (x == null ? y == null : x.equals(y)) pass();
else fail(x + " not equal to " + y);}
public static void main(String[] args) throws Throwable {
try {realMain(args);} catch (Throwable t) {unexpected(t);}
System.out.println("\nPassed = " + passed + " failed = " + failed);
if (failed > 0) throw new AssertionError("Some tests failed");}
}