def test_upper(self):
self.assertEqual(first_letter_lower("AbDe3fd#EDFG"), "abDe3fd#EDFG")
self.assertEqual(first_letter_lower("A a a a"), "a a a a")
def test_real(self):
self.assertEqual(first_letter_lower("Exact"), "exact")
self.assertEqual(first_letter_lower("MemberOf"), "memberOf")
self.assertEqual(first_letter_lower("NotEmpty"), "notEmpty")
def test_lower(self):
self.assertEqual(first_letter_lower("abcdefgh"), "abcdefgh")
self.assertEqual(first_letter_lower("a a a a"), "a a a a")
