public async Task return_single_country()
{
var mockHttp = new MockHttpMessageHandler();
//setup mock test
mockHttp.When("https://api.covid19api.com/countries")
.Respond("application/json", "{ 'Country': 'Barbados'} "); // respond with Barbados
var client = mockHttp.ToHttpClient();
var apiservice = new CovidService(client);
var user = await apiservice.GetCountry <SingleCountry>();
user.Country.ShouldBe("Barbados");
}