public void CurrencyConversion_From_USD_To_MXN_Fails()
{
var result = CurrencyConversion.Convert(
42,
CurrencyType.USD,
CurrencyType.MXN);
Assert.IsTrue(result.IsError);
}
public void CurrencyConversion_From_CAD_To_MXN_Succeeds()
{
var result = CurrencyConversion.Convert(
42,
CurrencyType.CAD,
CurrencyType.MXN)
.AssertOk();
Assert.AreEqual(420, result.Amount);
}
public void CurrencyConversion_From_USD_To_CAD_Succeeds()
{
var result = CurrencyConversion.Convert(
42,
CurrencyType.USD,
CurrencyType.CAD)
.AssertOk();
Assert.AreEqual(84, result.Amount);
}
public async Task Convert(string amountInput, string fromInput, string ignoreThis, string toInput)
{
bool validFrom = Enum.TryParse(fromInput.ToUpper(), out CoinType from);
bool validTo = Enum.TryParse(toInput.ToUpper(), out CoinType to);
bool validAmount = double.TryParse(amountInput, out double amount);
if (!validFrom)
{
await ReplyAsync(string.Format("'{0}' is not a valid currency", fromInput));
}
else if (!validTo)
{
await ReplyAsync(string.Format("'{0}' is not a valid currency", toInput));
}
else if (!validAmount || amount < 0)
{
await ReplyAsync("The amount you gave is invalid");
}
else if (amount % 1 != 0)
{
await ReplyAsync("Please use whole numbers, you can't have half a coin. Convert to smaller coin values if you need to");
}
else if (amount >= 1000000000000000)
{
await ReplyAsync("The amount you gave is too large");
}
else
{
ConversionResult result = CurrencyConversion.Convert(from, to, amount);
string reply = string.Format("{0:n0} {1} is {2:n0} {3}", amount, from.ToTileString(), result.result, result.resultCurrency.ToTileString());
List <string> remainders = new List <string>();
for (int i = result.remainders.Length - 1; i >= 0; i--)
{
if (result.remainders[i] != 0)
{
remainders.Add(string.Format("{0:n0} {1}", result.remainders[i], ((CoinType)i).ToTileString()));
}
}
if (remainders.Count > 0)
{
for (int i = 0; i < remainders.Count - 1; i++)
{
reply += ", " + remainders[i];
}
reply += " and " + remainders[remainders.Count - 1];
}
await ReplyAsync(reply);
}
}
