public void DeleteCreditCardTest() { Assert.AreEqual(2, _cardService.GetAllCreditCards().Count()); _cardService.AddCreditCard(_creditCard); Assert.AreEqual(3, _cardService.GetAllCreditCards().Count()); _cardService.DeleteCreditCard(_cardService.GetAllCreditCards().Last().CardNumber); Assert.AreEqual(2, _cardService.GetAllCreditCards().Count()); }