/*
* This file is part of muCommander, http://www.mucommander.com
* Copyright (C) 2002-2016 Maxence Bernard
*
* muCommander is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* muCommander 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.mucommander.commons.io;
import org.testng.annotations.Test;
import java.io.ByteArrayInputStream;
import java.io.IOException;
/**
* A test case for {@link com.mucommander.commons.io.BoundedInputStream}.
*
* @see com.mucommander.commons.io.BoundedInputStream
* @author Maxence Bernard, Nicolas Rinaudo
*/
public class BoundedInputStreamTest {
private final static byte[] TEST_BYTES = new byte[]{0x6d, 0x75, 0x63, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x65, 0x72};
/**
* Performs some tests that are common to {@link #testBoundedStreamWithException()} and
* {@link #testBoundedStreamWithoutException()}.
*
* @param bin the BoundedInputStream to prepare
* @throws IOException should not happen
*/
private void prepareBoundedStream(BoundedInputStream bin) throws IOException {
assert 0 == bin.getProcessedBytes();
assert 4 == bin.getRemainingBytes();
assert 4 == bin.getAllowedBytes();
assert bin.read()!=-1;
assert 1 == bin.getProcessedBytes();
assert 3 == bin.getRemainingBytes();
assert 4 == bin.getAllowedBytes();
assert bin.read(new byte[1])!=-1;
assert 2 == bin.getProcessedBytes();
assert 2 == bin.getRemainingBytes();
assert 4 == bin.getAllowedBytes();
assert bin.read(new byte[1], 0, 1)!=-1;
assert 3 == bin.getProcessedBytes();
assert 1 == bin.getRemainingBytes();
assert 4 == bin.getAllowedBytes();
assert bin.skip(1)!=-1;
assert 4 == bin.getProcessedBytes();
assert 0 == bin.getRemainingBytes();
assert 4 == bin.getAllowedBytes();
}
/**
* Tests a <code>BoundedInputStream</code> operating in bounded mode and throwing a {@link StreamOutOfBoundException}.
*
* @throws IOException should not happen
*/
@Test
public void testBoundedStreamWithException() throws IOException {
BoundedInputStream bin = new BoundedInputStream(new ByteArrayInputStream(TEST_BYTES), 4, true);
prepareBoundedStream(bin);
boolean exceptionThrown = false;
try { bin.read(); }
catch(StreamOutOfBoundException e) { exceptionThrown = true; }
assert exceptionThrown;
exceptionThrown = false;
try { bin.read(new byte[1]); }
catch(StreamOutOfBoundException e) { exceptionThrown = true; }
assert exceptionThrown;
exceptionThrown = false;
try { bin.read(new byte[1], 0, 1); }
catch(StreamOutOfBoundException e) { exceptionThrown = true; }
assert exceptionThrown;
exceptionThrown = false;
try { bin.skip(1); }
catch(StreamOutOfBoundException e) { exceptionThrown = true; }
assert exceptionThrown;
assert 4 == bin.getProcessedBytes();
assert 0 == bin.getRemainingBytes();
assert 4 == bin.getAllowedBytes();
// Attempt to read a chunk larger than the remaining bytes and assert that it does not throw a StreamOutOfBoundException
bin = new BoundedInputStream(new ByteArrayInputStream(TEST_BYTES), 4, true);
assert bin.read(new byte[6])!=-1;
assert 4 == bin.getProcessedBytes();
assert 0 == bin.getRemainingBytes();
assert 4 == bin.getAllowedBytes();
}
/**
* Tests a <code>BoundedInputStream</code> operating in bounded mode and returning <code>-1/</code>.
*
* @throws IOException should not happen
*/
@Test
public void testBoundedStreamWithoutException() throws IOException {
BoundedInputStream bin = new BoundedInputStream(new ByteArrayInputStream(TEST_BYTES), 4, false);
prepareBoundedStream(bin);
assert -1 == bin.read();
assert -1 == bin.read(new byte[1]);
assert -1 == bin.read(new byte[1], 0, 1);
assert -1 == bin.skip(1);
assert 4 == bin.getProcessedBytes();
assert 0 == bin.getRemainingBytes();
assert 4 == bin.getAllowedBytes();
// Attempt to read a chunk larger than the remaining bytes and assert that it does not return -1
bin = new BoundedInputStream(new ByteArrayInputStream(TEST_BYTES), 4, false);
assert bin.read(new byte[6])!=-1;
}
/**
* Tests a <code>BoundedInputStream</code> operating in unbounded mode.
*
* @throws IOException should not happen
*/
@Test
public void testUnboundedStream() throws IOException {
BoundedInputStream bin = new BoundedInputStream(new ByteArrayInputStream(TEST_BYTES), -1, false);
assert 0 == bin.getProcessedBytes();
assert Long.MAX_VALUE == bin.getRemainingBytes();
assert -1 == bin.getAllowedBytes();
assert bin.read()!=-1;
assert 1 == bin.getProcessedBytes();
assert Long.MAX_VALUE == bin.getRemainingBytes();
assert -1 == bin.getAllowedBytes();
assert bin.read(new byte[1])!=-1;
assert 2 == bin.getProcessedBytes();
assert Long.MAX_VALUE == bin.getRemainingBytes();
assert -1 == bin.getAllowedBytes();
assert bin.read(new byte[1], 0, 1)!=-1;
assert 3 == bin.getProcessedBytes();
assert Long.MAX_VALUE == bin.getRemainingBytes();
assert -1 == bin.getAllowedBytes();
long totalRead = 0;
while(bin.read()!=-1)
totalRead ++;
assert 8 == totalRead;
}
}