def test_mountain(self): self.assertFalse(is_palindrome('mountain'))
def test_a(self): self.assertTrue(is_palindrome('a'))
def test_abcddcba(self): self.assertTrue(is_palindrome('abcddcba'))
def test_captain(): assert_false(is_palindrome('captain'))
def test_empty(self): self.assertTrue(is_palindrome(''))
def test_b(): assert_true(is_palindrome('b'))
def test_racecar(): assert_true(is_palindrome('racecar'))
def test_empty_string(): assert_true(is_palindrome(''))