public void WhenPublish_ThenAllReceiversAreIncluded()
{
ArraySegment <IRingBuffer> buffers;
Registry.GetBuffers(typeof(A), out buffers);
var expectedCount = buffers.Count;
A any;
var e = new Envelope();
_writer.Write(ref e, ref any, null).ReturnsForAnyArgs(true);
var a = new A();
_bus.Publish(ref a);
_writer.ReceivedWithAnyArgs(expectedCount).Write(ref e, ref a, null);
}