public void PerformGeometricLinkingShouldReturnSingleValueAsResult()
{
var financialMath = new FinancialMath();
var result = financialMath.PerformGeometricLinking(new[] { 0.1m });
Assert.Equal(0.1m, result.Value);
Assert.Equal("0.1 = 0.1", result.Calculation);
}
public void AnnualizeByMonthShouldModifyValueAsExpected()
{
var financialMath = new FinancialMath();
var result = financialMath.AnnualizeByMonth(0.716m, 13);
Assert.Equal(0.646180649989542m, result.Value);
Assert.Equal("((1 + 0.716) ^ (12 * 1 / 13)) - 1 = 0.646180649989542", result.Calculation);
}
public void PerformGeometricLinkingShouldLinkingOnMoreThanTwoValues()
{
var financialMath = new FinancialMath();
var result = financialMath.PerformGeometricLinking(new[] { 0.1m, 0.2m, 0.3m });
Assert.Equal(0.716m, result.Value);
Assert.Equal("((1 + ((1 + 0.1) * (1 + 0.2) - 1)) * (1 + 0.3) - 1) = 0.716", result.Calculation);
}
public Withdraw DoWithdrawal(int amount)
{
if (amount % 10 != 0)
{
throw new BaseException(Messages.invalid_amount);
}
if (amount < 0)
{
throw new BaseException(Messages.negative_value_is_invalid);
}
var(hundredNotes, hundredRest) = FinancialMath.DivideAndGetMod(amount, 100);
var(fiftyNotes, fiftyRest) = FinancialMath.DivideAndGetMod(hundredRest, 50);
var(twentyNotes, twentyRest) = FinancialMath.DivideAndGetMod(fiftyRest, 20);
var(tenNotes, _) = FinancialMath.DivideAndGetMod(twentyRest, 10);
return(new Withdraw(tenNotes, twentyNotes, fiftyNotes, hundredNotes));
}
/// <summary>
/// Retrieves a price quote from Google™ Calculator.
/// </summary>
/// <param name="security">The security for which to get the quote.</param>
/// <param name="currency">The currency in which to express the quote.</param>
/// <returns>The requested price quote.</returns>
public PriceQuote GetPriceQuote(Security security, Security currency)
{
if (security == null)
{
throw new ArgumentNullException(nameof(security));
}
if (currency == null)
{
throw new ArgumentNullException(nameof(currency));
}
if (currency.SecurityType != SecurityType.Currency)
{
throw new ArgumentException("The argument must be a Security with a SecurityType of Currency", nameof(currency));
}
if (security.SecurityType != SecurityType.Currency)
{
throw BuildError(security.Symbol, "Only currencies are supported.");
}
var client = new WebClient();
string data;
try
{
data = client.DownloadString(string.Format(UrlFormat, security.Symbol, currency.Symbol));
}
catch (WebException ex)
{
throw BuildError(security.Symbol + currency.Symbol, "Check the inner exception for details.", ex);
}
DateTimeOffset date;
decimal price;
try
{
var result = Parse(data).Last();
date = result.Item1;
price = result.Item2;
}
catch (InvalidOperationException ex)
{
throw BuildError(security.Symbol + currency.Symbol, "Check the inner exception for details.", ex);
}
checked
{
var quantity = (long)security.FractionTraded;
price *= currency.FractionTraded;
var longPrice = (long)Math.Floor(price);
while (longPrice != price)
{
price *= 10;
quantity *= 10;
longPrice = (long)Math.Floor(price);
}
var gcd = FinancialMath.GCD(longPrice, quantity / security.FractionTraded);
quantity /= gcd;
longPrice /= gcd;
return(new PriceQuote(Guid.NewGuid(), date.UtcDateTime, security, quantity, currency, longPrice, "Google™ Calculator"));
}
}
/// <summary>
/// Retrieves a price quote from Yahoo!® Finance.
/// </summary>
/// <param name="security">The security for which to get the quote.</param>
/// <param name="currency">The currency in which to express the quote.</param>
/// <returns>The requested price quote.</returns>
public PriceQuote GetPriceQuote(Security security, Security currency)
{
if (security == null)
{
throw new ArgumentNullException(nameof(security));
}
if (currency == null)
{
throw new ArgumentNullException(nameof(currency));
}
if (currency.SecurityType != SecurityType.Currency)
{
throw new ArgumentException("The argument must be a Security with a SecurityType of Currency", nameof(currency));
}
if (security.SecurityType != SecurityType.Stock &&
security.SecurityType != SecurityType.Fund &&
security.SecurityType != SecurityType.Currency)
{
throw BuildError(security.Symbol, "Only stocks, funds, and currencies are supported.");
}
var symbol = security.Symbol;
if (security.SecurityType == SecurityType.Currency)
{
symbol = symbol + currency.Symbol + "=X";
}
var client = new WebClient();
string data;
try
{
data = client.DownloadString(string.Format(UrlFormat, symbol));
}
catch (WebException ex)
{
throw BuildError(symbol, "Check the inner exception for details.", ex);
}
var split = data.Split(',');
if (split.Length != 4)
{
throw BuildError(symbol, "The data returned was not in a recognized format.");
}
var date = Unquote(split[1]);
var time = Unquote(split[2]);
var value = Unquote(split[3]);
if (date == "N/A")
{
throw BuildError(symbol, "The symbol could not be found.");
}
if (!DateTime.TryParse(date, out var utcDate))
{
throw BuildError(symbol, "The data returned was not in a recognized format.");
}
var yahooTimeZone = TimeZoneInfo.FindSystemTimeZoneById(YahooTimeZoneId);
var minDate = TimeZoneInfo.ConvertTimeFromUtc(utcDate, yahooTimeZone);
if (!DateTime.TryParse(minDate.ToShortDateString() + " " + time, out var dateTime))
{
throw BuildError(symbol, "The data returned was not in a recognized format.");
}
if (dateTime < minDate)
{
dateTime.AddDays(1);
}
dateTime = TimeZoneInfo.ConvertTimeToUtc(dateTime, yahooTimeZone);
if (!decimal.TryParse(value, out var price))
{
throw BuildError(symbol, "The data returned was not in a recognized format.");
}
checked
{
var quantity = (long)security.FractionTraded;
price *= currency.FractionTraded;
var longPrice = (long)Math.Floor(price);
while (longPrice != price)
{
price *= 10;
quantity *= 10;
longPrice = (long)Math.Floor(price);
}
var gcd = FinancialMath.GCD(longPrice, quantity / security.FractionTraded);
quantity /= gcd;
longPrice /= gcd;
return(new PriceQuote(Guid.NewGuid(), dateTime, security, quantity, currency, longPrice, "Yahoo!® Finance"));
}
}
protected void FindInterestButton_Click(object sender, EventArgs e)
{
var financialMath = new FinancialMath();
InterestLabel.Text = "" + FinancialMath.GetInterest(double.Parse(RateBox.Text), double.Parse(PricipleBox.Text));
}