public void ShouldWriteToEmptyBuffer()
{
const int length = 8;
var recordLength = length + RingBufferDescriptor.HeaderLength;
var alignedRecordLength = recordLength.AlignToMultipleOf(RingBufferDescriptor.RecordAlignment);
const int headValue = 0;
_atomicLong.VolatileRead(Arg.Is(Head)).Returns(headValue);
const int tailValue = 0;
_atomicLong.Read(Arg.Is(Tail)).Returns(tailValue);
var block = stackalloc byte[100];
var chunk = new ByteChunk(block, length);
Assert.IsTrue(_ringBuffer.Write(MessageTypeId, chunk));
Received.InOrder(() =>
{
_buffer.Write(RingBufferDescriptor.EncodedMsgOffset(tailValue), chunk);
_buffer.GetAtomicLong(tailValue);
_atomicLong.VolatileWrite(CurrentSlot, RingBufferDescriptor.MakeHeader(recordLength, MessageTypeId));
_atomicLong.VolatileWrite(Tail, tailValue + alignedRecordLength);
});
}
public void ShouldReadNothingFromEmptyBuffer()
{
const long head = 0L;
_atomicLong.Read(Head).Returns(head);
var handler = default(MessageHandler);
var read = _ringBuffer.Read(handler, 100);
Assert.AreEqual(0, read);
}