public void Throws_When_source_returns_duplicate_rate()
{
var aud = new Currency("AUD");
var bgn = new Currency("BGN");
var czk = new Currency("CZK");
var source = new ExchangeRateMemorySource(
new ExchangeRate(aud, czk, 15.748M),
new ExchangeRate(bgn, czk, 13.073M),
new ExchangeRate(bgn, czk, 5.503M));
var provider = new ExchangeRateProvider(source);
Assert.ThrowsException <ExchangeRateProviderException>(() => provider.GetExchangeRates(new[] { aud, bgn }).GetAwaiter().GetResult());
}
public void Can_provide_requested_rates_When_available_from_source()
{
var aud = new Currency("AUD");
var bgn = new Currency("BGN");
var dkk = new Currency("DKK");
var brl = new Currency("BRL");
var czk = new Currency("CZK");
var source = new ExchangeRateMemorySource(
new ExchangeRate(aud, czk, 15.748M),
new ExchangeRate(bgn, czk, 13.073M),
new ExchangeRate(brl, czk, 5.503M));
var provider = new ExchangeRateProvider(source);
var result = provider.GetExchangeRates(new[] { aud, bgn, dkk }).GetAwaiter().GetResult();
Assert.AreEqual(2, result.Count());
Assert.IsTrue(result.Any(x => x.SourceCurrency == aud), "AUD rate is in source data and is requested, must be in results");
Assert.IsTrue(result.Any(x => x.SourceCurrency == bgn), "BGN rate is in source data and is requested, must be in results");
Assert.IsFalse(result.Any(x => x.SourceCurrency == dkk), "DKK rate is not in source data and is requeste, cannot be in results");
Assert.IsFalse(result.Any(x => x.SourceCurrency == brl), "BRL rate is in source data but was not requested, cannot be in results");
}
