public async Task InvokeConnectionAsync_WritesToConnections_Output()
        {
            using (var client1 = new TestClient())
                using (var client2 = new TestClient())
                {
                    var manager     = new OrleansHubLifetimeManager <MyHub>(new LoggerFactory().CreateLogger <OrleansHubLifetimeManager <MyHub> >(), this._fixture.ClientProvider);
                    var connection1 = HubConnectionContextUtils.Create(client1.Connection);
                    var connection2 = HubConnectionContextUtils.Create(client2.Connection);

                    await manager.OnConnectedAsync(connection1);

                    await manager.OnConnectedAsync(connection2);

                    await manager.SendConnectionsAsync(new string[] { connection1.ConnectionId, connection2.ConnectionId }, "Hello", new object[] { "World" });

                    await AssertMessageAsync(client1);
                    await AssertMessageAsync(client2);
                }
        }