def test_equals_2(self): self.assertEqual(credit(5318273647283745), 'Master')
def test_equals(self): self.assertEqual(credit(6011364837263748), 'Discover')
def test_equals_4(self): self.assertEqual(credit(371236473823676), 'AMEX')
def test_equals_5(self): self.assertEqual(credit(4128374839283), 'VISA')
def test_equals_3(self): self.assertEqual(credit(12345678910), 'Invalid')