/*
* Copyright 2014 NAVER Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.navercorp.pinpoint.common.buffer;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.nio.ByteBuffer;
/**
* @author emeroad
*/
public class OffsetAutomaticBufferTest {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
@Test
public void testGetBuffer() throws Exception {
final int bufferSize = 10;
byte[] byteArray = new byte[bufferSize];
Buffer buffer = new OffsetAutomaticBuffer(byteArray, 2, byteArray.length - 2);
final int putValue = 10;
buffer.putInt(putValue);
byte[] intBuffer = buffer.getBuffer();
Assert.assertNotSame("deepcopy", intBuffer, byteArray);
Assert.assertEquals(intBuffer.length, 4);
Buffer read = new FixedBuffer(intBuffer);
int value = read.readInt();
Assert.assertEquals(putValue, value);
}
@Test
public void testGetBuffer_shallowcopy() throws Exception {
final int bufferSize = 4;
byte[] byteArray = new byte[bufferSize];
Buffer buffer = new OffsetAutomaticBuffer(byteArray);
final int putValue = 10;
buffer.putInt(putValue);
byte[] intBuffer = buffer.getBuffer();
Assert.assertSame("shallowcopy", intBuffer, byteArray);
Assert.assertEquals(intBuffer.length, 4);
Buffer read = new FixedBuffer(intBuffer);
int value = read.readInt();
Assert.assertEquals(putValue, value);
}
@Test
public void testCopyBuffer() throws Exception {
final int bufferSize = 10;
byte[] byteArray = new byte[bufferSize];
Buffer buffer = new OffsetAutomaticBuffer(byteArray, 2, bufferSize - 2);
final int putValue = 10;
buffer.putInt(putValue);
byte[] intBuffer = buffer.copyBuffer();
Assert.assertNotSame("deepcopy", intBuffer, byteArray);
Assert.assertEquals(intBuffer.length, 4);
Buffer read = new FixedBuffer(intBuffer);
int value = read.readInt();
Assert.assertEquals(putValue, value);
}
@Test
public void testWrapByteBuffer() throws Exception {
final int bufferSize = 10;
byte[] byteArray = new byte[bufferSize];
Buffer buffer = new OffsetAutomaticBuffer(byteArray, 2, bufferSize - 2);
buffer.putInt(1);
buffer.putInt(2);
ByteBuffer byteBuffer = buffer.wrapByteBuffer();
Assert.assertSame("shallowcopy", byteArray, byteBuffer.array());
Assert.assertEquals(1, byteBuffer.getInt());
Assert.assertEquals(2, byteBuffer.getInt());
}
@Test
public void testCheckExpand() throws Exception {
final int bufferSize = 4;
int startOffset = 2;
Buffer buffer = new OffsetAutomaticBuffer(new byte[bufferSize], startOffset, bufferSize - startOffset);
Assert.assertEquals("remaining", buffer.remaining(), 2);
buffer.putInt(1);
buffer.putInt(2);
int remaining = buffer.remaining();
logger.debug("remaining:{}", remaining);
ByteBuffer byteBuffer = buffer.wrapByteBuffer();
Assert.assertEquals(1, byteBuffer.getInt());
Assert.assertEquals(2, byteBuffer.getInt());
}
@Test
public void testCheckExpand_test() throws Exception {
final int bufferSize = 4;
Buffer buffer = new OffsetAutomaticBuffer(new byte[bufferSize], 0, bufferSize);
Assert.assertEquals("remaining", buffer.remaining(), 4);
buffer.putInt(1);
Assert.assertEquals("remaining", buffer.remaining(), 0);
buffer.putInt(2);
int remaining = buffer.remaining();
logger.debug("remaining:{}", remaining);
ByteBuffer byteBuffer = buffer.wrapByteBuffer();
Assert.assertEquals(1, byteBuffer.getInt());
Assert.assertEquals(2, byteBuffer.getInt());
}
}