def test_equals_2(self): self.assertEqual(palindrome_chain_length(1), 0)
def test_equals_5(self): self.assertEqual(palindrome_chain_length(10), 1)
def test_equals(self): self.assertEqual(palindrome_chain_length(87), 4)
def test_equals_4(self): self.assertEqual(palindrome_chain_length(89), 24)