public async Task return_newconfirmed_single_value()
        {
            var mockHttp = new MockHttpMessageHandler();

            //setup mock test
            mockHttp.When("https://api.covid19api.com/summary")
            .Respond("application/json", "{ 'Global': { 'NewConfirmed': '100'}} ");     // respond with 100

            var client = mockHttp.ToHttpClient();

            var apiservice = new CovidService(client);
            var user       = await apiservice.GetSummary <ApiRootObject>();

            user.Global.NewConfirmed.ShouldBe(100);
        }