def METHOD_NAME(self):
    # should return default value since no option
    self.assertEqual(Options()._get_characters("a"), "")
    # should return \'character\' as default since no option
    self.assertEqual(Options()._get_characters("a", "character"), "character")
    # should return \'char\' as in option
    self.assertEqual(
        Options({"a": "char"})._get_characters("a", "character"), "char"
    )