public void WhenAClientSubscribesToAnExistingQueue_TheClientShouldBeAdded()
{
var client1 = _listener.GetASubscribedClient("/test");
var client2 = _listener.GetASubscribedClient("/test");
Assert.That(_server.Queues.First().Clients.Contains(client1));
Assert.That(_server.Queues.First().Clients.Contains(client2));
}