/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Apr 9, 2007
*/
package com.bigdata.io;
import java.io.IOException;
import junit.framework.TestCase2;
import com.bigdata.util.BytesUtil;
/**
* Test suite for {@link DataOutputBuffer}.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class TestDataOutputBuffer extends TestCase2
{
/**
*
*/
public TestDataOutputBuffer() {
}
/**
* @param arg0
*/
public TestDataOutputBuffer(String arg0) {
super(arg0);
}
/**
* ctor tests, including correct rejection.
*/
public void test_ctor() {
{
final DataOutputBuffer buf = new DataOutputBuffer();
assertNotNull(buf.array());
assertEquals(DataOutputBuffer.DEFAULT_INITIAL_CAPACITY,
buf.array().length);
assertEquals(0, buf.pos);
}
{
final DataOutputBuffer buf = new DataOutputBuffer(0);
assertNotNull(buf.array());
assertEquals(0, buf.array().length);
assertEquals(0, buf.pos);
}
{
final DataOutputBuffer buf = new DataOutputBuffer(20);
assertNotNull(buf.array());
assertEquals(20, buf.array().length);
assertEquals(0, buf.pos);
}
{
final byte[] expected = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
final DataOutputBuffer buf = new DataOutputBuffer(4, expected);
assertNotNull(buf.array());
assertEquals(4, buf.pos);
assertEquals(10, buf.array().length);
assertTrue(expected == buf.array());
}
}
/**
* correct rejection tests.
*/
public void test_ctor_correctRejection() {
try {
new DataOutputBuffer(-1);
fail("Expecting: " + IllegalArgumentException.class);
} catch (IllegalArgumentException ex) {
System.err.println("Ignoring expected exception: " + ex);
}
try {
new DataOutputBuffer(20, new byte[10]);
fail("Expecting: " + IllegalArgumentException.class);
} catch (IllegalArgumentException ex) {
System.err.println("Ignoring expected exception: " + ex);
}
}
/*
* DataOutput API tests.
*/
/**
* Tests ability to append to the buffer, including with overflow of the
* buffer capacity.
*/
public void test_append_bytes() throws IOException {
// setup buffer with some data and two(2) free bytes.
DataOutputBuffer DataOutputBuffer = new DataOutputBuffer(5, new byte[] {
1, 2, 3, 4, 5, 0, 0 });
/*
* fill to capacity by copying two bytes from the middle of another
* array. since this does not overflow we know the exact capacity of the
* internal buffer (it is not reallocated).
*/
byte[] tmp = new byte[] { 4, 5, 6, 7, 8, 9 };
DataOutputBuffer.write(tmp, 2, 2);
assertEquals(7, DataOutputBuffer.pos);
assertEquals(new byte[] { 1, 2, 3, 4, 5, 6, 7 }, DataOutputBuffer.array());
assertEquals(0, BytesUtil.compareBytes(
new byte[] { 1, 2, 3, 4, 5, 6, 7 }, DataOutputBuffer.array()));
// overflow capacity (new capacity is not known in advance).
tmp = new byte[] { 8, 9, 10 };
byte[] expected = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
DataOutputBuffer.write(tmp);
assertEquals(10, DataOutputBuffer.pos);
assertEquals(0, BytesUtil.compareBytesWithLenAndOffset(0,
expected.length, expected, 0, DataOutputBuffer.pos,
DataOutputBuffer.array()));
// possible overflow (old and new capacity are unknown).
tmp = new byte[] { 11, 12 };
expected = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
DataOutputBuffer.write(tmp);
assertEquals(12, DataOutputBuffer.pos);
assertEquals(0, BytesUtil.compareBytesWithLenAndOffset(0,
expected.length, expected, 0, DataOutputBuffer.pos,
DataOutputBuffer.array()));
}
/**
* Test ability to extract and return a key.
*/
public void test_getKey() {
DataOutputBuffer DataOutputBuffer = new DataOutputBuffer(5, new byte[] {
1, 2, 3, 4, 5, 6, 7, 8, 9, 10 });
byte[] key = DataOutputBuffer.toByteArray();
assertEquals(5, key.length);
assertEquals(new byte[] { 1, 2, 3, 4, 5 }, key);
}
/**
* Verify returns zero length byte[] when the key has zero bytes.
*/
public void test_getKey_len0() {
DataOutputBuffer DataOutputBuffer = new DataOutputBuffer();
byte[] key = DataOutputBuffer.toByteArray();
assertEquals(0, key.length);
}
/**
* Test ability to reset the key buffer (simply zeros the #of valid bytes in
* the buffer without touching the buffer itself).
*/
public void test_reset() {
final byte[] expected = new byte[10];
final DataOutputBuffer DataOutputBuffer = new DataOutputBuffer(5,
expected);
assertEquals(5, DataOutputBuffer.pos);
assertTrue(expected == DataOutputBuffer.array());
assertTrue(DataOutputBuffer == DataOutputBuffer.reset());
assertEquals(0, DataOutputBuffer.pos);
assertTrue(expected == DataOutputBuffer.array());
}
// // @todo write round-trip tests.
// public void test_roundTrip() {
//
// fail("write tests");
//
// }
}