public ActionResult Index()
{
Dictionary<string, string> currencies = CurrencyService.GetCurrencies();
var vm = new IndexModel();
vm.AvailableCurrencies = new SelectList(currencies, "Key", "Value");
vm.SourceCurrency = "USD"; // Initial default
vm.DestinationCurrency = "JPY"; // Initial default
return View(vm);
}
public void Verify_Destination_Currency_Properly_Calculated()
{
// Create mock currency service
var stubbedCurrencyService = MockRepository.GenerateStub<ICurrencyService>();
var rate = (decimal)0.5d;
stubbedCurrencyService.Stub(s => s.GetExchangeRate("ABC", "MTG")).Return(rate);
// Call controller action
var controller = new CurrencyController(stubbedCurrencyService);
var indexModel = new IndexModel { SourceCurrency = "ABC", DestinationCurrency = "MTG", SourceAmount = 15 };
var result = (ContentResult)controller.Convert(indexModel);
// Validate
Assert.That(result.Content, Is.EqualTo((indexModel.SourceAmount * rate).ToString()));
}
public ActionResult Convert(IndexModel vm)
{
if (!ModelState.IsValid)
{
string errors = string.Join("<br />", ModelState.Values
.SelectMany(x => x.Errors)
.Select(x => x.ErrorMessage));
return new ContentResult{ Content = errors };
}
decimal exchangeRate;
try
{
exchangeRate = CurrencyService.GetExchangeRate(vm.SourceCurrency, vm.DestinationCurrency);
}
catch (CurrencyServiceException ex)
{
return new ContentResult {Content = ex.Message};
}
decimal newValue = vm.SourceAmount * exchangeRate;
return new ContentResult { Content = newValue.ToString() };
}