private AddPaymentCommand CreateValidAddPaymentCommand()
 {
     return(new AddPaymentCommand()
     {
         Amount = 32.23m,
         Currency = "EUR",
         CreditCard = CreditCardValidatorTests.CreateValidCard()
     });
 }
        public static AddPaymentCommand CreateValidCommand()
        {
            var command = new AddPaymentCommand()
            {
                Amount     = 20.22m,
                CreditCard = CreditCardValidatorTests.CreateValidCard(),
                Currency   = "USD"
            };

            return(command);
        }