public async Task Weather_Controller_Should_Return_Weather_By_City_ID(int id) { ApplicationData applicationData = new ApplicationData { OWMUrl = "https://api.openweathermap.org/data/2.5/weather?", OWMApiKey = "f1b58a47aa129daa6330e7280a88e7b5" }; var options = Options.Create <ApplicationData>(applicationData); var mockFactory = new Mock <IHttpClientFactory>(); var client = new HttpClient(); mockFactory.Setup(x => x.CreateClient(It.IsAny <string>())).Returns(client); IHttpClientFactory factory = mockFactory.Object; IClientService clientService = new ClientService(factory); IWeatherService weatherService = new WeatherService(clientService, options); WeatherController controller = new WeatherController(weatherService); var result = await controller.GetCurrentWeatherByCityID(id); Assert.NotNull(result.Value.ResponseBody); Assert.IsType <WeatherModel>(result.Value.ResponseBody); }