def test_lower_case(self): self.assertTrue(_is_top_level_char("f"))
def test_trailing_space(self): self.assertFalse(_is_top_level_char("B "))
def test_multiple_chars(self): self.assertFalse(_is_top_level_char("BE"))
def test_alphanum(self): self.assertFalse(_is_top_level_char("a2"))
def test_numeric(self): self.assertFalse(_is_top_level_char("1"))
def test_simple_case(self): self.assertTrue(_is_top_level_char("A"))