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"""Test default config file."""

from ruamel.yaml import YAML
from ruamel.yaml.comments import CommentedMap

from tests.testing.path import path_default_config_yaml


def nested_key_check(comment_map: CommentedMap) -> None:
    """Test whether default configuration file exists specific character."""
    for key, val in comment_map.items():
        assert "." not in key, f"There is not allowed special character in key `{key}`."
        if isinstance(val, CommentedMap):
            nested_key_check(val)


def test_key_without_dot_delimiter():
    """Test wrapper of whether default configuration file exists specific character."""
    yaml = YAML()
    with open(path_default_config_yaml, "r") as f:
        comment_map = yaml.load(f.read())
        nested_key_check(comment_map)
