/*
* 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.CharArrayReader;
import java.io.IOException;
/**
* A test case for {@link com.mucommander.commons.io.BoundedReader}.
*
* @see com.mucommander.commons.io.BoundedReader
* @author Maxence Bernard, Nicolas Rinaudo
*/
public class BoundedReaderTest {
private final static char[] TEST_CHARACTERS = new char[]{'m', 'u', 'c', 'o', 'm', 'm', 'a', 'n', 'd', 'e', 'r'};
/**
* Performs some tests that are common to {@link #testBoundedReaderWithException()} and
* {@link #testBoundedReaderWithoutException()}.
*
* @param br the BoundedReader to prepare
* @throws IOException should not happen
*/
private void prepareBoundedReader(BoundedReader br) throws IOException {
assert 0 == br.getReadCounter();
assert 4 == br.getRemainingCharacters();
assert 4 == br.getAllowedCharacters();
assert br.read()!=-1;
assert 1 == br.getReadCounter();
assert 3 == br.getRemainingCharacters();
assert 4 == br.getAllowedCharacters();
assert br.read(new char[1])!=-1;
assert 2 == br.getReadCounter();
assert 2 == br.getRemainingCharacters();
assert 4 == br.getAllowedCharacters();
assert br.read(new char[1], 0, 1)!=-1;
assert 3 == br.getReadCounter();
assert 1 == br.getRemainingCharacters();
assert 4 == br.getAllowedCharacters();
assert br.skip(1)!=-1;
assert 4 == br.getReadCounter();
assert 0 == br.getRemainingCharacters();
assert 4 == br.getAllowedCharacters();
}
/**
* Tests a <code>BoundedReader</code> operating in bounded mode.
*
* @throws IOException should not happen
*/
@Test
public void testBoundedReaderWithException() throws IOException {
BoundedReader br = new BoundedReader(new CharArrayReader(TEST_CHARACTERS), 4, new StreamOutOfBoundException(4));
prepareBoundedReader(br);
boolean exceptionThrown = false;
try { br.read(); }
catch(StreamOutOfBoundException e) { exceptionThrown = true; }
assert exceptionThrown;
exceptionThrown = false;
try { br.read(new char[1]); }
catch(StreamOutOfBoundException e) { exceptionThrown = true; }
assert exceptionThrown;
exceptionThrown = false;
try { br.read(new char[1], 0, 1); }
catch(StreamOutOfBoundException e) { exceptionThrown = true; }
assert exceptionThrown;
exceptionThrown = false;
try { br.skip(1); }
catch(StreamOutOfBoundException e) { exceptionThrown = true; }
assert exceptionThrown;
assert 4 == br.getReadCounter();
assert 0 == br.getRemainingCharacters();
assert 4 == br.getAllowedCharacters();
// Attempt to read a chunk larger than the remaining characters and assert that it does not throw a StreamOutOfBoundException
br = new BoundedReader(new CharArrayReader(TEST_CHARACTERS), 4);
assert br.read(new char[6])!=-1;
}
/**
* Tests a <code>BoundedReader</code> operating in bounded mode.
*
* @throws IOException should not happen
*/
@Test
public void testBoundedReaderWithoutException() throws IOException {
BoundedReader br = new BoundedReader(new CharArrayReader(TEST_CHARACTERS), 4);
prepareBoundedReader(br);
assert -1 == br.read();
assert -1 == br.read(new char[1]);
assert -1 == br.read(new char[1], 0, 1);
assert -1 == br.skip(1);
assert 4 == br.getReadCounter();
assert 0 == br.getRemainingCharacters();
assert 4 == br.getAllowedCharacters();
// Attempt to read a chunk larger than the remaining characters and assert that it does not return -1
br = new BoundedReader(new CharArrayReader(TEST_CHARACTERS), 4);
assert br.read(new char[6])!=-1;
}
/**
* Tests a <code>BoundedReader</code> operating in unbounded mode.
*
* @throws IOException should not happen
*/
@Test
public void testUnboundedReader() throws IOException {
BoundedReader br = new BoundedReader(new CharArrayReader(TEST_CHARACTERS), -1);
assert 0 == br.getReadCounter();
assert Long.MAX_VALUE == br.getRemainingCharacters();
assert -1 == br.getAllowedCharacters();
assert br.read()!=-1;
assert 1 == br.getReadCounter();
assert Long.MAX_VALUE == br.getRemainingCharacters();
assert -1 == br.getAllowedCharacters();
assert br.read(new char[1])!=-1;
assert 2 == br.getReadCounter();
assert Long.MAX_VALUE == br.getRemainingCharacters();
assert -1 == br.getAllowedCharacters();
assert br.read(new char[1], 0, 1)!=-1;
assert 3 == br.getReadCounter();
assert Long.MAX_VALUE == br.getRemainingCharacters();
assert -1 == br.getAllowedCharacters();
long totalRead = 0;
while(br.read()!=-1)
totalRead ++;
assert 8 == totalRead;
}
}