public void DispatchMessage_CallsEnqueueMessageOnSubscribedChannels()
{
var relayLink = A.Fake <IChannel>();
_dispatcherService.AddChannel(relayLink);
_dispatcherService.DispatchMessage(_emptyMessage);
A.CallTo(() => relayLink.EnqueueMessage(_emptyMessage)).MustHaveHappenedOnceExactly();
}