public void poll()
{
var descriptor = _queue.LoadTask(_pathToTask);
InitializeDocumentDescriptor command = null;
_commandBus.When(c => c.Send(Arg.Any <InitializeDocumentDescriptor>(), Arg.Any <string>()))
.Do(callInfo => command = (InitializeDocumentDescriptor)callInfo.Args()[0]);
_queue.PollFileSystem();
// asserts
_blobstore.Received().Upload(Arg.Is(_originalFormat), Arg.Is <FileNameWithExtension>(f => f.ToString() == descriptor.FileName), Arg.Any <Stream>());
var calls = _blobstore.ReceivedCalls();
Assert.NotNull(command);
Assert.AreEqual(_blobId, command.BlobId);
Assert.NotNull(command.HandleInfo);
Assert.AreEqual(_documentHandle, command.HandleInfo.Handle);
}