public void Starting_Dns_Server_Starts_Listeners()
{
var mockListener = new Mocker<IDnsListener>();
var factory = new Mocker<IDnsListenerFactory>()
.With(x => x.CreateListeners(), new List<IDnsListener> { mockListener.ToEntity() })
.ToEntity();
var server = new DnsServer(factory);
server.StartListening();
mockListener.AssertWasCalledOnce(x => x.StartListening());
}
