public void Convert_AmountIsZero_ShouldReturnZero()
{
//Arrange
var currencyFrom = new Currency("dkk");
var currencyTo = new Currency("eur");
var moneyExchangeRequest = new MoneyExchangeRequest(currencyFrom, currencyTo, 0);
//Act
var result = _currencyCalculator.Convert(moneyExchangeRequest);
//Assert
result.ShouldBe(0);
}
public void CreateMoneyExchangeRequest_ValidData_ShouldSucceed(int amount)
{
//Arrange
var currencyFrom = GetValidCurrency();
var currencyTo = GetValidCurrency();
//Act
var moneyExchangeRequest = new MoneyExchangeRequest(currencyFrom, currencyTo, amount);
//Assert
moneyExchangeRequest.CurrencyFrom.Iso.ShouldBe(currencyFrom.Iso);
moneyExchangeRequest.CurrencyTo.Iso.ShouldBe(currencyTo.Iso);
moneyExchangeRequest.Amount.ShouldBe(amount);
}
public void CreateFromUserInput_InputIsValid_ShouldSucceed(string userInput)
{
//Arrange
var splitUserInput = userInput.Split(' ');
var expectedCurrencyFrom = splitUserInput[0].Split('/')[0].ToUpperInvariant();
var expectedCurrencyTo = splitUserInput[0].Split('/')[1].ToUpperInvariant();
var expectedAmount = decimal.Parse(splitUserInput[1]);
//Act
var moneyExchangeRequest = MoneyExchangeRequest.CreateFromUserInput(userInput);
//Assert
moneyExchangeRequest.CurrencyFrom.Iso.ShouldBe(expectedCurrencyFrom);
moneyExchangeRequest.CurrencyTo.Iso.ShouldBe(expectedCurrencyTo);
moneyExchangeRequest.Amount.ShouldBe(expectedAmount);
}
public decimal Convert(MoneyExchangeRequest moneyExchangeRequest)
{
if (moneyExchangeRequest is null)
{
throw new DomainException("MoneyExchangeRequest cannot be null");
}
if (moneyExchangeRequest.Amount == 0)
{
return(0);
}
var exchangeRate = _xrProvider
.GetExchangeRate(moneyExchangeRequest.CurrencyFrom, moneyExchangeRequest.CurrencyTo);
var convertedAmount = decimal.Multiply(moneyExchangeRequest.Amount, exchangeRate);
return(convertedAmount);
}
public void Convert_ShouldSucceed()
{
//Arrange
var currencyFrom = new Currency("dkk");
var currencyTo = new Currency("eur");
var amount = 19.51m;
var moneyExchangeRequest = new MoneyExchangeRequest(currencyFrom, currencyTo, amount);
var exchangeRate = 2.57m;
var expectedResult = decimal.Multiply(amount, exchangeRate);
_xrProviderMock.Setup(x => x.GetExchangeRate(currencyFrom, currencyTo))
.Returns(exchangeRate);
//Act
var result = _currencyCalculator.Convert(moneyExchangeRequest);
//Assert
result.ShouldBe(expectedResult);
}
static void Main(string[] args)
{
var diContainer = new DIContainer();
var calculator = diContainer.GetService <ICurrencyCalculator>();
string userInput = string.Empty;
#if DEBUG
Console.WriteLine("Usage: <currencyFrom>/<currencyTo> <amount to exchange>");
userInput = Console.ReadLine();
#else
if (!args.Any() || args.Length != 2)
{
Console.WriteLine("Usage: Exchange <currencyFrom>/<currencyTo> <amount to exchange>");
return;
}
userInput = $"{args[0]} {args[1]}";
#endif
try
{
var moneyExchangeRequest = MoneyExchangeRequest.CreateFromUserInput(userInput);
var convertedAmount = calculator.Convert(moneyExchangeRequest);
Console.WriteLine($"{convertedAmount} {moneyExchangeRequest.CurrencyTo.Iso}");
}
catch (DomainException ex)
{
Console.WriteLine(ex.Message);
return;
}
catch (Exception)
{
Console.WriteLine("Something went wrong.");
return;
}
}
public void CreateFromUserInput_InputIsInvalid_ShouldThrowException(string userInput)
{
//Act && Assert
Should.Throw <DomainException>(() => MoneyExchangeRequest.CreateFromUserInput(userInput));
}
