def test_is_successful_errored(self):
card = Card()
card.status = "errored"
card_payment = CardPayment()
card_payment.card = card
self.assertFalse(card_payment.is_successful())
def test_is_successful(self):
card = Card()
card.status = "processed"
card_payment = CardPayment()
card_payment.card = card
self.assertTrue(card_payment.is_successful())