gt:         assertEquals( (byte) 0, verificationBuffer.get() );
context: /**
   * Copyright (c) 2002-2011 "Neo Technology,"
   * Network Engine for Objects in Lund AB [http://neotechnology.com]
   *
   * This file is part of Neo4j.
   *
   * Neo4j is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as
   * published by the Free Software Foundation, either version 3 of the
   * License, or (at your option) any later version.
   *
   * 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 Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program. If not, see <http://www.gnu.org/licenses/>.
   */
  package org.neo4j.ha;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertThat;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.nio.channels.ReadableByteChannel;
  import java.util.Arrays;
  
  import org.hamcrest.BaseMatcher;
  import org.hamcrest.Description;
  import org.jboss.netty.buffer.ChannelBuffer;
  import org.jboss.netty.buffer.ChannelBuffers;
  import org.junit.Test;
  import org.neo4j.com.BlockLogBuffer;
  import org.neo4j.com.BlockLogReader;
  
  public class TestBlockLogBuffer
  {
      @Test
      public void onlyOneNonFullBlock() throws IOException
      {
          byte[] bytes = new byte[255];
          ChannelBuffer wrappedBuffer = ChannelBuffers.wrappedBuffer( bytes );
          wrappedBuffer.resetWriterIndex();
          BlockLogBuffer buffer = new BlockLogBuffer( wrappedBuffer );
  
          byte byteValue = 5;
          int intValue = 1234;
          long longValue = 574853;
          float floatValue = 304985.5f;
          double doubleValue = 48493.22d;
          final byte[] bytesValue = new byte[] { 1, 5, 2, 6, 3 };
          final char[] charsValue = "This is chars".toCharArray();
          buffer.put( byteValue );
          buffer.putInt( intValue );
          buffer.putLong( longValue );
          buffer.putFloat( floatValue );
          buffer.putDouble( doubleValue );
          buffer.put( bytesValue );
          buffer.put( charsValue );
          buffer.done();
  
          ByteBuffer verificationBuffer = ByteBuffer.wrap( bytes );
          assertEquals( 56, verificationBuffer.get() );
          assertEquals( byteValue, verificationBuffer.get() );
          assertEquals( intValue, verificationBuffer.getInt() );
          assertEquals( longValue, verificationBuffer.getLong() );
          assertEquals( floatValue, verificationBuffer.getFloat(), 0.0 );
          assertEquals( doubleValue, verificationBuffer.getDouble(), 0.0 );
          byte[] actualBytes = new byte[bytesValue.length];
          verificationBuffer.get( actualBytes );
          assertThat( actualBytes, new ArrayMatches<byte[]>( bytesValue ) );
          char[] actualChars = new char[charsValue.length];
          verificationBuffer.asCharBuffer().get( actualChars );
          assertThat( actualChars, new ArrayMatches<char[]>( charsValue ) );
      }
      
      @Test
      public void readSmallPortions() throws IOException
      {
          byte[] bytes = new byte[255];
          ChannelBuffer wrappedBuffer = ChannelBuffers.wrappedBuffer( bytes );
          wrappedBuffer.resetWriterIndex();
          BlockLogBuffer buffer = new BlockLogBuffer( wrappedBuffer );
          
          byte byteValue = 5;
          int intValue = 1234;
          long longValue = 574853;
          buffer.put( byteValue );
          buffer.putInt( intValue );
          buffer.putLong( longValue );
          buffer.done();
          
          ReadableByteChannel reader = new BlockLogReader( wrappedBuffer );
          ByteBuffer verificationBuffer = ByteBuffer.wrap( new byte[1] );
          reader.read( verificationBuffer );
          verificationBuffer.flip();
          assertEquals( byteValue, verificationBuffer.get() );
          verificationBuffer = ByteBuffer.wrap( new byte[4] );
          reader.read( verificationBuffer );
          verificationBuffer.flip();
          assertEquals( intValue, verificationBuffer.getInt() );
          verificationBuffer = ByteBuffer.wrap( new byte[8] );
          reader.read( verificationBuffer );
          verificationBuffer.flip();
          assertEquals( longValue, verificationBuffer.getLong() );
      }
  
      @Test
      public void readOnlyOneNonFullBlock() throws IOException
      {
          byte[] bytes = new byte[255];
          ChannelBuffer wrappedBuffer = ChannelBuffers.wrappedBuffer( bytes );
          wrappedBuffer.resetWriterIndex();
          BlockLogBuffer buffer = new BlockLogBuffer( wrappedBuffer );
  
          byte byteValue = 5;
          int intValue = 1234;
          long longValue = 574853;
          float floatValue = 304985.5f;
          double doubleValue = 48493.22d;
          final byte[] bytesValue = new byte[] { 1, 5, 2, 6, 3 };
          final char[] charsValue = "This is chars".toCharArray();
          buffer.put( byteValue );
          buffer.putInt( intValue );
          buffer.putLong( longValue );
          buffer.putFloat( floatValue );
          buffer.putDouble( doubleValue );
          buffer.put( bytesValue );
          buffer.put( charsValue );
          buffer.done();
  
          ReadableByteChannel reader = new BlockLogReader( wrappedBuffer );
          ByteBuffer verificationBuffer = ByteBuffer.wrap( new byte[1000] );
          reader.read( verificationBuffer );
          verificationBuffer.flip();
          assertEquals( byteValue, verificationBuffer.get() );
          assertEquals( intValue, verificationBuffer.getInt() );
          assertEquals( longValue, verificationBuffer.getLong() );
          assertEquals( floatValue, verificationBuffer.getFloat(), 0.0 );
          assertEquals( doubleValue, verificationBuffer.getDouble(), 0.0 );
          byte[] actualBytes = new byte[bytesValue.length];
          verificationBuffer.get( actualBytes );
          assertThat( actualBytes, new ArrayMatches<byte[]>( bytesValue ) );
          char[] actualChars = new char[charsValue.length];
          verificationBuffer.asCharBuffer().get( actualChars );
          assertThat( actualChars, new ArrayMatches<char[]>( charsValue ) );
      }
      
      @Test
      public void onlyOneFullBlock() throws Exception
      {
          byte[] bytes = new byte[256];
          ChannelBuffer wrappedBuffer = ChannelBuffers.wrappedBuffer( bytes );
          wrappedBuffer.resetWriterIndex();
          BlockLogBuffer buffer = new BlockLogBuffer( wrappedBuffer );
  
          byte[] bytesValue = new byte[255];
          bytesValue[0] = 1;
          bytesValue[254] = -1;
          buffer.put( bytesValue );
          buffer.done();
  
          ByteBuffer verificationBuffer = ByteBuffer.wrap( bytes );
          assertEquals( (byte) 255, verificationBuffer.get() );
          byte[] actualBytes = new byte[bytesValue.length];
          verificationBuffer.get( actualBytes );
          assertThat( actualBytes, new ArrayMatches<byte[]>( bytesValue ) );
      }
  
      @Test
      public void readOnlyOneFullBlock() throws Exception
      {
          byte[] bytes = new byte[256];
          ChannelBuffer wrappedBuffer = ChannelBuffers.wrappedBuffer( bytes );
          wrappedBuffer.resetWriterIndex();
          BlockLogBuffer buffer = new BlockLogBuffer( wrappedBuffer );
  
          byte[] bytesValue = new byte[255];
          bytesValue[0] = 1;
          bytesValue[254] = -1;
          buffer.put( bytesValue );
          buffer.done();
  
          ReadableByteChannel reader = new BlockLogReader( wrappedBuffer );
          ByteBuffer verificationBuffer = ByteBuffer.wrap( new byte[1000] );
          reader.read( verificationBuffer );
          verificationBuffer.flip();
          byte[] actualBytes = new byte[bytesValue.length];
          verificationBuffer.get( actualBytes );
          assertThat( actualBytes, new ArrayMatches<byte[]>( bytesValue ) );
      }
      
      @Test
      public void canWriteLargestAtomAfterFillingBuffer() throws Exception
      {
          byte[] bytes = new byte[300];
          ChannelBuffer wrappedBuffer = ChannelBuffers.wrappedBuffer( bytes );
          wrappedBuffer.resetWriterIndex();
          BlockLogBuffer buffer = new BlockLogBuffer( wrappedBuffer );
  
          byte[] bytesValue = new byte[255];
          bytesValue[0] = 1;
          bytesValue[254] = -1;
          long longValue = 123456;
          buffer.put( bytesValue );
          buffer.putLong( longValue );
          buffer.done();
  
          ByteBuffer verificationBuffer = ByteBuffer.wrap( bytes );
  