static void Main(string[] args)
{
var ordinalNumbersService = new OrdinalNumbersService();
var ordinalRepresentation = ordinalNumbersService.GetOrdinalRepresentation(21);
Console.WriteLine($"Calculated ordinal representation of 21 is {ordinalRepresentation}. Expected was 21st");
var creditMaskingService = new CreditCardService();
var maskedCreditCardNumber = creditMaskingService.Maskify("5512-4543-4434-2333");
Console.WriteLine($"Calculated masked credit number of 5512-4543-4434-2333 is {maskedCreditCardNumber}. Expected was 5###-####-####-2333");
}
public void Maskify_ForEmptyString_ShouldReturnEmptyString()
{
// Arrange
var creditCardNumber = "";
// Act
var maskifiedString = _creditCardService.Maskify(creditCardNumber);
// Assert
Assert.AreEqual("", maskifiedString);
}