public void Exchange_ShouldThrow_WhenCurrencyIsNotFound(FxExchange exchange, IExchangeRateHolder rateHolder)
{
// arrange
var sut = new CurrencyExchanger(rateHolder);
// act
// assert
Should.Throw <InvalidCurrencyException>(() => sut.Exchange(exchange));
}
public CurrencyExchanger(IExchangeRateHolder exchangeRateHolder)
{
_exchangeRateHolder = exchangeRateHolder ?? throw new ArgumentNullException(nameof(exchangeRateHolder));
}
public void Exchange_ShouldReturnTheSameAmount_AsRequested(FxExchange exchange, IExchangeRateHolder rateHolder)
{
// arrange
var sut = new CurrencyExchanger(rateHolder);
exchange.CurrencyPair.From = exchange.CurrencyPair.To;
// act
var result = sut.Exchange(exchange);
// assert
result.ShouldBe(exchange.Amount);
}
