def test_even_false(self): self.assertFalse(checker("abcd"))
def test_odd_true(self): self.assertTrue(checker("abcdcba"))
def test_case_true(self): self.assertTrue(checker("Abcba"))
def test_even_true(self): self.assertTrue(checker("abccba"))
def test_odd_false(self): self.assertFalse(checker("abcde"))