def test_equals_2(self):
     self.assertEqual(reverse(0), 0)
 def test_equals_4(self):
     self.assertEqual(reverse(1234567891011), 1101987654321)
 def test_equals(self):
     self.assertEqual(reverse(123456), 654321)
 def test_equals_3(self):
     self.assertEqual(reverse(100), 1)