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/*
*
* 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.qpid.management.domain.services;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.*;
import junit.framework.TestCase;
import org.apache.qpid.api.Message;
import org.apache.qpid.nclient.util.ByteBufferMessage;
import org.apache.qpid.transport.codec.BBDecoder;
/**
* Tests case for messaeg tokenizer.
*
* @author Andrea Gazzarini
*/
public class MessageTokenizerTest extends TestCase {
/**
* Tests the execution of the message tokenizer when the given message is not a valid AMQP message.
*
* <br>precondition : the incoming message is not a valid AMQP message.
* <br>postcondition : no exception is thrown and there will be exactly one token with the given message.
*/
public void testOK_WithNoMessage() throws IOException{
byte [] noMessage = {2,10,120,23,23,23,4,10,11,12,2,1,3,-22};
Message multiMessage = new ByteBufferMessage();
multiMessage.appendData(noMessage);
MessageTokenizer tokenizer = new MessageTokenizer(multiMessage);
assertEquals(1, tokenizer.countTokens());
assertEquals(tokenizer.nextElement(),noMessage);
assertFalse(tokenizer.hasMoreElements());
}
/**
* Tests the execution of the message tokenizer when the given message contains only one message.
*
* <br>precondition : the incoming message contains only one message.
* <br>postcondition : no exception is thrown and there will be exactly one token with the given message.
*/
public void testOK_WithOneMessage() throws IOException{
byte [] oneEncodedMessage = {'A','M','2',23,23,23,4,10,11,12,2,1,3,-22};
Message multiMessage = new ByteBufferMessage();
multiMessage.appendData(oneEncodedMessage);
MessageTokenizer tokenizer = new MessageTokenizer(multiMessage);
assertEquals(1, tokenizer.countTokens());
assertEquals(tokenizer.nextElement(),oneEncodedMessage);
assertFalse(tokenizer.hasMoreElements());
}
/**
* Tests the execution of the message tokenizer when the given message contains a random number of messages.
*
* <br>precondition : the incoming message contains a random number of messages.
* <br>postcondition : no exception is thrown and each built token is a valid message starting with right header.
*/
public void testOK_WithRandomNUmberOfMessages() throws IOException{
Random randomizer = new Random();
int howManyLoops = randomizer.nextInt(10000);
howManyLoops = (howManyLoops == 0) ? 10 : howManyLoops;
byte [] compoundMessageData = new byte [12 * howManyLoops];
List<byte []> messages = new ArrayList<byte[]>(howManyLoops);
int position = 0;
for (int i = 0; i < howManyLoops; i++)
{
byte [] message = new byte[12];
System.arraycopy(MessageTokenizer.MAGIC_NUMBER_BYTES, 0, compoundMessageData, position, MessageTokenizer.MAGIC_NUMBER_BYTES.length);
System.arraycopy(MessageTokenizer.MAGIC_NUMBER_BYTES, 0, message, 0, MessageTokenizer.MAGIC_NUMBER_BYTES.length);
position+=MessageTokenizer.MAGIC_NUMBER_BYTES.length;
for (int c = 3; c < 12; c++)
{
byte aByte = (byte)randomizer.nextInt(127);
aByte = (aByte == 77) ? (byte)c : aByte;
compoundMessageData[position++] = aByte;
message[c] = aByte;
}
messages.add(message);
}
Message multiMessage = new ByteBufferMessage();
multiMessage.appendData(compoundMessageData);
MessageTokenizer tokenizer = new MessageTokenizer(multiMessage);
int howManyTokens = tokenizer.countTokens();
assertEquals(howManyLoops, howManyTokens);
int index = 0;
while (tokenizer.hasMoreElements())
{
assertEquals(tokenizer.nextElement(),messages.get(index++));
}
assertEquals((index),howManyTokens);
}
/**
* Internal method used for comparison of two messages.
*
* @param message the token message just built by the tokenizer.
* @param expected the expected result.
*/
private void assertEquals(Message message, byte [] expected) throws IOException
{
ByteBuffer messageContent = message.readData();
BBDecoder decoder = new BBDecoder();
decoder.init(messageContent);
byte [] content = decoder.readReaminingBytes();
assertTrue(Arrays.equals(content, expected));
}
}
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