public async Task GetCountryCities()
{
//action
WeatherController controller = new WeatherController();
JsonResult result = await controller.GetCountryCities("Australia") as JsonResult;
//convert data result
var data = (IEnumerable <iAsset.WeatherViewer.DataModel.City>)result.Data;
//check if the first data in Model list is Adelaide Airport
Assert.AreEqual("Adelaide Airport", data.First().CityName);
}