/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.cocoon.util;
import java.io.ByteArrayOutputStream;
import java.util.Arrays;
import junit.framework.TestCase;
public class BufferedOutputStreamTestCase extends TestCase {
public void testUnlimitedBuffering() throws Exception
{
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(byteArrayOutputStream, -1, 32);
byte[] bytes = new byte[1024];
for (int i = 0; i < bytes.length; i++) {
bytes[i] = (byte) i;
}
assertEquals("Count of buffered and flushed bytes is wrong", 0, bufferedOutputStream.getCount());
assertEquals("Streamed bytes is not empty", 0, byteArrayOutputStream.size());
// write bytes into buffer
bufferedOutputStream.write(bytes);
assertEquals("Count of buffered and flushed bytes is wrong", bytes.length, bufferedOutputStream.getCount());
assertEquals("Streamed bytes is not empty", 0, byteArrayOutputStream.size());
// reset, all back to beginning
bufferedOutputStream.reset();
assertEquals("Count of buffered and flushed bytes is wrong", 0, bufferedOutputStream.getCount());
assertEquals("Streamed bytes is not empty", 0, byteArrayOutputStream.size());
// write bytes into buffer
bufferedOutputStream.write(bytes);
assertEquals("Count of buffered and flushed bytes is wrong", bytes.length, bufferedOutputStream.getCount());
assertEquals("Streamed bytes is not empty", 0, byteArrayOutputStream.size());
// eventually flush
bufferedOutputStream.flush();
byte[] streamedBytes = byteArrayOutputStream.toByteArray();
assertEquals("Count of buffered and flushed bytes is wrong", bytes.length, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", bytes.length, byteArrayOutputStream.size());
assertTrue("Streamed bytes are wrong", Arrays.equals(bytes, streamedBytes));
}
public void testCompleteBuffering() throws Exception
{
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(byteArrayOutputStream, 1024, 32);
byte[] bytes = new byte[1000];
for (int i = 0; i < bytes.length; i++) {
bytes[i] = (byte) i;
}
assertEquals("Count of buffered and flushed bytes is wrong", 0, bufferedOutputStream.getCount());
assertEquals("Streamed bytes is not empty", 0, byteArrayOutputStream.size());
// write bytes into buffer
bufferedOutputStream.write(bytes);
assertEquals("Count of buffered and flushed bytes is wrong", bytes.length, bufferedOutputStream.getCount());
assertEquals("Streamed bytes is not empty", 0, byteArrayOutputStream.size());
// reset, all back to beginning
bufferedOutputStream.reset();
assertEquals("Count of buffered and flushed bytes is wrong", 0, bufferedOutputStream.getCount());
assertEquals("Streamed bytes is not empty", 0, byteArrayOutputStream.size());
// write bytes into buffer
bufferedOutputStream.write(bytes);
assertEquals("Count of buffered and flushed bytes is wrong", bytes.length, bufferedOutputStream.getCount());
assertEquals("Streamed bytes is not empty", 0, byteArrayOutputStream.size());
// eventually flush
bufferedOutputStream.flush();
byte[] streamedBytes = byteArrayOutputStream.toByteArray();
assertEquals("Count of buffered and flushed bytes is wrong", bytes.length, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", bytes.length, byteArrayOutputStream.size());
assertTrue("Streamed bytes are wrong", Arrays.equals(bytes, streamedBytes));
}
public void testCompleteBufferingHittingFlushSize() throws Exception
{
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(byteArrayOutputStream, 1024, 32);
byte[] bytes = new byte[1024];
for (int i = 0; i < bytes.length; i++) {
bytes[i] = (byte) i;
}
assertEquals("Count of buffered and flushed bytes is wrong", 0, bufferedOutputStream.getCount());
assertEquals("Streamed bytes is not empty", 0, byteArrayOutputStream.size());
// write bytes into buffer, buffer will be flushed automatically
bufferedOutputStream.write(bytes);
byte[] streamedBytes = byteArrayOutputStream.toByteArray();
assertEquals("Count of buffered and flushed bytes is wrong", bytes.length, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", bytes.length, byteArrayOutputStream.size());
assertTrue("Streamed bytes are wrong", Arrays.equals(bytes, streamedBytes));
// reset should not change anything
bufferedOutputStream.reset();
streamedBytes = byteArrayOutputStream.toByteArray();
assertEquals("Count of buffered and flushed bytes is wrong", bytes.length, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", bytes.length, byteArrayOutputStream.size());
assertTrue("Streamed bytes are wrong", Arrays.equals(bytes, streamedBytes));
}
public void testBufferingExceedingFlushSize() throws Exception
{
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
int flushSize = 512;
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(byteArrayOutputStream, flushSize, 32);
byte[] bytes = new byte[2000];
for (int i = 0; i < bytes.length; i++) {
bytes[i] = (byte) i;
}
assertEquals("Count of buffered and flushed bytes is wrong", 0, bufferedOutputStream.getCount());
assertEquals("Streamed bytes is not empty", 0, byteArrayOutputStream.size());
// write bytes into buffer
bufferedOutputStream.write(bytes);
int flushed = ((int)bytes.length / flushSize) * flushSize;
assertEquals("Count of buffered and flushed bytes is wrong", bytes.length, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", flushed, byteArrayOutputStream.size());
// reset, back to last flush
bufferedOutputStream.reset();
assertEquals("Count of buffered and flushed bytes is wrong", flushed, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", flushed, byteArrayOutputStream.size());
// write bytes into buffer
bufferedOutputStream.write(bytes, flushed, bytes.length - flushed);
assertEquals("Count of buffered and flushed bytes is wrong", bytes.length, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", flushed, byteArrayOutputStream.size());
// eventually flush
bufferedOutputStream.flush();
byte[] streamedBytes = byteArrayOutputStream.toByteArray();
assertEquals("Count of buffered and flushed bytes is wrong", bytes.length, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", bytes.length, byteArrayOutputStream.size());
assertTrue("Streamed bytes are wrong", Arrays.equals(bytes, streamedBytes));
}
public void testBufferingExceedingFlushSizeWithInitialContent() throws Exception
{
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
int flushSize = 512;
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(byteArrayOutputStream, flushSize, 32);
byte[] bytes = new byte[2000];
for (int i = 0; i < bytes.length; i++) {
bytes[i] = (byte) i;
}
int initialContentSize = 50;
bufferedOutputStream.write(bytes, 0, initialContentSize);
assertEquals("Count of buffered and flushed bytes is wrong", initialContentSize, bufferedOutputStream.getCount());
assertEquals("Streamed bytes is not empty", 0, byteArrayOutputStream.size());
// write bytes into buffer
bufferedOutputStream.write(bytes);
int flushed = ((int)((initialContentSize + bytes.length) / flushSize)) * flushSize;
assertEquals("Count of buffered and flushed bytes is wrong", initialContentSize + bytes.length, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", flushed, byteArrayOutputStream.size());
// reset, back to last flush
bufferedOutputStream.reset();
assertEquals("Count of buffered and flushed bytes is wrong", flushed, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", flushed, byteArrayOutputStream.size());
// write bytes into buffer
bufferedOutputStream.write(bytes, flushed - initialContentSize, bytes.length - flushed + initialContentSize);
assertEquals("Count of buffered and flushed bytes is wrong", initialContentSize + bytes.length, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", flushed, byteArrayOutputStream.size());
// eventually flush
bufferedOutputStream.flush();
byte[] streamedBytes = byteArrayOutputStream.toByteArray();
assertEquals("Count of buffered and flushed bytes is wrong", initialContentSize + bytes.length, bufferedOutputStream.getCount());
assertEquals("Count of streamed bytes is wrong", initialContentSize + bytes.length, byteArrayOutputStream.size());
byte[] expectedBytes = new byte[2050];
System.arraycopy(bytes, 0, expectedBytes, 0, initialContentSize);
System.arraycopy(bytes, 0, expectedBytes, initialContentSize, bytes.length);
assertTrue("Streamed bytes are wrong", Arrays.equals(expectedBytes, streamedBytes));
}
}