public async Task GetExchangeRateAsync_Should_Return_Correct_Exchange_Rate_With_Markup()
{
// arrange
var exchangeRateResponse = new ExchangeRateResponse {
DestinationCountry = "IN", SourceCountry = "US", ExchangeRate = 1.0m
};
_mockProvider.GetExchangeRateAsync("US", "IN", _cxlToken)
.Returns(Task.FromResult(exchangeRateResponse));
_mockMarkupRepository.GetMarkupPercentageAsync("US", "IN", _cxlToken)
.Returns(Task.FromResult(5m));
// act
var result = await _service.GetExchangeRateAsync("US", "IN", _cxlToken);
// assert
Assert.AreEqual(0.95, result);
}
public async Task <decimal> GetExchangeRateAsync(string fromCountryCode, string toCountryCode, CancellationToken cxlToken)
{
if (string.IsNullOrEmpty(fromCountryCode) || string.IsNullOrEmpty(toCountryCode))
{
throw new ArgumentNullException("countryCode");
}
var exchangeRate = await _provider.GetExchangeRateAsync(fromCountryCode, toCountryCode, cxlToken);
if (exchangeRate == null)
{
throw new Exception("Unable to fetch exchange rate from provider");
}
var markup = await _markupRepository.GetMarkupPercentageAsync(fromCountryCode, toCountryCode, cxlToken);
var markupAmount = exchangeRate.ExchangeRate * markup * 0.01m;
return(exchangeRate.ExchangeRate - markupAmount);
}
