public async Task receiving_for_unkown_endpoint_sents_to_err_queue()
        {
            var to = new EnvelopeToClient()
            {
                To = new EndpointId("other", "locat"), Messages = new[] { new MyEvent() }
            };
            await _sut.DeliverToLocalProcessors(to).ConfigureFalse();

            _err.Received(1).UnknownEndpoint(Arg.Any <EndpointNotFoundException>());
            await _config.DidNotReceive().AddToProcessing(Arg.Any <MyEvent>());
        }