/// <summary>
/// Konverterer fra en kryptovaluta til en anden.
/// Hvis en af de angivne valutaer ikke findes, kaster funktionen en ArgumentException
///
/// </summary>
/// <param name="fromCurrencyName">Navnet på den valuta, der konverterers fra</param>
/// <param name="toCurrencyName">Navnet på den valuta, der konverteres til</param>
/// <param name="amount">Beløbet angivet i valutaen angivet i fromCurrencyName</param>
/// <returns>Værdien af beløbet i toCurrencyName</returns>
public double Convert(String fromCurrencyName, String toCurrencyName, double amount)
{
//The validation happens inside 'GetCryptoCurrency'
CryptoCurrencyDbModel fromCurrency = _cryptoCurrencyDb.GetCryptoCurrency(fromCurrencyName, true);
//We use the unit price from the database to get it in dollar
double fromCurrencyDollar = amount * fromCurrency.UnitPrice;
//The validation happens inside 'GetCryptoCurrency'
CryptoCurrencyDbModel toCurrency = _cryptoCurrencyDb.GetCryptoCurrency(toCurrencyName, true);
//Convert to dollars
var toCurrencyDollar = fromCurrencyDollar / toCurrency.UnitPrice;
return(toCurrencyDollar);
}
public void ThrowArgumentException_When_CryptoCurrencyName_Is_Wrong()
{
string currencyName = "Bitcoin";
var cryptoCurrencyDb = new CryptoCurrencyDb(DatabaseConnectionString);
Assert.Throws <ArgumentException>(() => cryptoCurrencyDb.GetCryptoCurrency(currencyName, true));
}
public void Can_Get_CryptoCurrencyName_Bitcoin()
{
string currencyName = "Bitcoin";
var cryptoCurrencyDb = new CryptoCurrencyDb(DatabaseConnectionString);
var result = cryptoCurrencyDb.GetCryptoCurrency(currencyName, true);
Assert.Equal(currencyName, result.CurrencyName);
}
public void Can_Update_UnitInDollar_Bitcoin()
{
string currencyName = "Bitcoin";
var cryptoCurrencyDb = new CryptoCurrencyDb(DatabaseConnectionString);
cryptoCurrencyDb.UpdateUnit(currencyName, 100);
CryptoCurrencyDbModel result = cryptoCurrencyDb.GetCryptoCurrency(currencyName, true);
Assert.Equal(100, result.UnitPrice);
}
