def test_result9(self):
s = "aacabdkacaa"
expected = "aca"
ls = LongestPalindromeSubstring()
result = ls.longestPalindrome(s)
self.assertEqual(expected, result)
def test_result8(self):
s = "babad"
expected = "bab"
ls = LongestPalindromeSubstring()
result = ls.longestPalindrome(s)
self.assertEqual(expected, result)