public Money Sum(Money augend, Money addend, Currency targetCurrency)
{
var x = _currencyExchanger.Exchange(augend, targetCurrency);
var y = _currencyExchanger.Exchange(addend, targetCurrency);
var sum = x.Amount + y.Amount;
return(new Money(sum, targetCurrency));
}
public void Exchange_FiveDollars_To_Dollars_Result_FiveDollars()
{
// Arrange
var fiveDollars = MoneyProvider.Dollar(5);
// Act
var result = _exchanger.Exchange(fiveDollars, Currency.USD);
// Assert
Assert.AreEqual(fiveDollars, result);
}
public void Exchange_ShouldThrow_WhenCurrencyIsNotFound(FxExchange exchange, IExchangeRateHolder rateHolder)
{
// arrange
var sut = new CurrencyExchanger(rateHolder);
// act
// assert
Should.Throw <InvalidCurrencyException>(() => sut.Exchange(exchange));
}
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);
}
private static void ExecuteExchange(FxExchange fxExchange)
{
var exchanger = new CurrencyExchanger(new ExchangeRateHolder(100));
try
{
Console.WriteLine(exchanger.Exchange(fxExchange));
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
public void Exchange_IsCase_Insensitive(string from, string to)
{
// arrange
var exchange = new FxExchange
{
Amount = 1,
CurrencyPair = new CurrencyPair {
From = from, To = to
}
};
var sut = new CurrencyExchanger(new ExchangeRateHolder(100));
// act
// assert
Should.NotThrow(() => sut.Exchange(exchange));
}
public void Exchange_ShouldExchangeTheAmount_AsRequested(string from, string to, int ammount, double expected)
{
// arrange
var exchange = new FxExchange {
Amount = ammount, CurrencyPair = new CurrencyPair {
From = from, To = to
}
};
var sut = new CurrencyExchanger(new ExchangeRateHolder(100));
// act
var result = sut.Exchange(exchange);
// assert
result.ShouldBe(expected);
}
public void Exchange_ShouldThrow_WithMessage(string currency, string expected)
{
// arrange
var exchange = new FxExchange
{
Amount = 1,
CurrencyPair = new CurrencyPair {
From = currency, To = "USD"
}
};
var sut = new CurrencyExchanger(new ExchangeRateHolder(100));
// act
// assert
var exception = Should.Throw <InvalidCurrencyException>(() => sut.Exchange(exchange));
exception.Message.ShouldBe(string.Format(expected, currency));
}
