public void _02_Creer_une_classe_Paypal_avec_une_methode_Pay()
{
Paypal paypal = new Paypal();
string transaction = paypal.Pay(10);
Assert.Equal("10 has been charged to my paypal account", transaction);
}
public void _03_Creer_une_interface_IPaiement_avec_une_methode_Pay_pour_unifier_CreditCard_et_Paypal()
{
IPayement creditCard = new CreditCard();
string creditCardTransaction = creditCard.Pay(100);
IPayement paypal = new Paypal();
string paypalTransaction = paypal.Pay(1000);
Assert.Equal("100 has been charged to my credit card", creditCardTransaction);
Assert.Equal("1000 has been charged to my paypal account", paypalTransaction);
}