def test_valiator_success(self):
card = CardValidator(4556821195558787)
assert card.__str__() == '************8787'
assert card.__repr__() == '<Credit Card: ************8787>'
def test_37_prefix_success(self):
card = CardValidator(372898003509418)
assert card.__str__() == '************418'
assert card.__repr__() == '<Credit Card: ************418>'
