public void Setup()
        {
            // setup signalr mocks
            _mockTwitchHub  = new Mock <IChatWebPageHub>();
            _mockHubClients = new Mock <IHubClients <IChatWebPageHub> >();
            _mockHubClients.Setup(x => x.All).Returns(_mockTwitchHub.Object);
            _mockHub = new Mock <IHubContext <ChatWebPageHub, IChatWebPageHub> >();
            _mockHub.Setup(x => x.Clients).Returns(_mockHubClients.Object);

            _handler = new UserHasArrivedHandler(MockBucketProvider.Object, _mockHub.Object);
        }