def test_validate_card_num_invalid(self):
"""
Test that form can rise error when credit card number wrong
"""
result = validate_card_number('41414141414141444')
self.assertFalse(result)
def test_validate_card_num_valid(self):
"""
Test that form can validate credit card number
"""
result = validate_card_number('4111111111111111')
self.assertTrue(result)