/*
 *  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.directory.server.dhcp;


import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;

import junit.framework.TestCase;

import org.apache.directory.server.dhcp.messages.DhcpMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 * @version $Rev$, $Date$
 */
public abstract class AbstractDhcpTestCase extends TestCase
{
    protected static final int MINIMUM_DHCP_DATAGRAM_SIZE = 576;
    protected final Logger log;


    public AbstractDhcpTestCase()
    {
        log = LoggerFactory.getLogger( AbstractDhcpTestCase.class );
    }


    public AbstractDhcpTestCase(Class subclass)
    {
        log = LoggerFactory.getLogger( subclass );
    }


    protected void print( DhcpMessage message )
    {
        log.debug( String.valueOf( message.getMessageType() ) );
        log.debug( String.valueOf( message.getHardwareAddress() ) );
        log.debug( String.valueOf( message.getTransactionId() ) );
        log.debug( String.valueOf( message.getSeconds() ) );
        log.debug( String.valueOf( message.getFlags() ) );
        log.debug( String.valueOf( message.getCurrentClientAddress() ) );
        log.debug( String.valueOf( message.getAssignedClientAddress() ) );
        log.debug( String.valueOf( message.getNextServerAddress() ) );
        log.debug( String.valueOf( message.getRelayAgentAddress() ) );
        log.debug( String.valueOf( message.getServerHostname() ) );
        log.debug( String.valueOf( message.getBootFileName() ) );
    }


    protected ByteBuffer getByteBufferFromFile( String file ) throws IOException
    {
        InputStream is = getClass().getResourceAsStream( file );

        byte[] bytes = new byte[MINIMUM_DHCP_DATAGRAM_SIZE];

        int offset = 0;
        int numRead = 0;
        while ( offset < bytes.length && ( numRead = is.read( bytes, offset, bytes.length - offset ) ) >= 0 )
        {
            offset += numRead;
        }

        is.close();
        return ByteBuffer.wrap( bytes );
    }
}