def test_equals_2(self): self.assertEqual(unused_digits(2015, 8, 26), '3479')
def test_equals(self): self.assertEqual(unused_digits(12, 34, 56, 78), '09')
def test_equals_4(self): self.assertEqual(unused_digits(643), '0125789')
def test_equals_5(self): self.assertEqual(unused_digits(864, 896, 744), '01235')
def test_equals_3(self): self.assertEqual(unused_digits(276, 575), '013489')