public void Append_returns_index()
{
var layout = new byte[50];
var block = new Block(layout);
Assert.That(block.Append(BitConverter.GetBytes(1111)), Is.EqualTo(0));
Assert.That(block.Append(BitConverter.GetBytes(2222)), Is.EqualTo(4));
}
public void BlockFullException_when_full()
{
var layout = new byte[10];
var block = new Block(layout);
Assert.Throws<BlockFullException>(() =>
{
block.Append(BitConverter.GetBytes(1111));
block.Append(BitConverter.GetBytes(7777));
});
}
public HotSegment(long capacity, List<Block> blocks)
{
_capacity = capacity;
Blocks = blocks;
if (blocks.Count > 0)
_current = blocks.Last();
else
{
_current = Block.New();
Blocks.Add(_current);
}
}
public void Burn(Block current, int count)
{
var blockLength = current.Payload.Length;
var offset = blockLength * (count - 1);
if (_fsSegment.Position != offset)
{
_fsSegment.Seek(offset, SeekOrigin.Begin);
}
_fsSegment.Write(current.Payload, 0, blockLength);
_fsSegment.Flush(true);
//Console.WriteLine("Burn [{0}] {1}", count, Path);
}
public IEnumerable<Block> FetchForward()
{
Reader.BaseStream.Position = 0;
Console.WriteLine("Fetch file#{0} {1}", Position, Name);
var blockBuffer = new byte[Units.KILO * 4];
while (Reader.Read(blockBuffer, 0, blockBuffer.Length) > 0)
{
var block = new Block(blockBuffer.ToArray());
if (block.Records().Count == 0)
break;
yield return block;
}
}
public void Format_Payload_and_Size()
{
var layout = new byte[50];
var block = new Block(layout);
block.Append(BitConverter.GetBytes(1111));
block.Append(Encoding.UTF8.GetBytes("hello this is very cool"));
Assert.That(BitConverter.ToInt32(layout, 0), Is.EqualTo(1111));
Assert.That(BitConverter.ToInt32(layout, 46), Is.EqualTo(4));
Assert.That(BitConverter.ToInt32(layout, 42), Is.EqualTo(23));
}
public void EmptyBlockTest()
{
var block = new Block(new byte[] {});
Assert.That(block.Records().Count, Is.EqualTo(0));
}
public void Size_tracking()
{
var layout = new byte[50];
var block = new Block(layout);
block.Append(BitConverter.GetBytes(1111));
block.Append(BitConverter.GetBytes(1111));
Assert.That(BitConverter.ToInt32(layout, 42), Is.EqualTo(4));
Assert.That(BitConverter.ToInt32(layout, 46), Is.EqualTo(4));
}
public void Parse_3_Records()
{
var layout = new byte[50];
var idx = layout.Length - 4;
var first = BitConverter.GetBytes(1111);
Array.Copy(first, 0, layout, idx, 4);
idx = idx - 4;
var second = BitConverter.GetBytes(2222);
Array.Copy(second, 0, layout, idx, 4);
idx = idx - 4;
var third = BitConverter.GetBytes(3333);
Array.Copy(third, 0, layout, idx, 4);
var block = new Block(layout);
var records = block.Records();
Assert.That(records.Count, Is.EqualTo(3));
Assert.That(records[0], Is.EqualTo(1111));
Assert.That(records[1], Is.EqualTo(2222));
Assert.That(records[2], Is.EqualTo(3333));
}
private void RollCurrentBlock()
{
_current = Block.New();
Blocks.Add(_current);
}