public TrafficLightControllerTest() { trafficLightRepo = Mock.Of <ITrafficLightRepository>(); logger = Mock.Of <ILogger <TrafficLightController> >(); clewareLampControl = Mock.Of <IClewareLampControl>(); var hubContextMock = new Mock <IHubContext <TrafficLightHub> >(); clientProxy = Mock.Of <IClientProxy>(); hubContextMock.SetupGet(x => x.Clients.All).Returns(clientProxy); trafficLightController = new TrafficLightController( logger, trafficLightRepo, clewareLampControl, hubContextMock.Object); }