import pytest
from pydantic import ValidationError

from app.config import Settings


def test_empty_crawl_limit_is_treated_as_none():
    settings = Settings(crawl_limit="")

    assert settings.crawl_limit is None


def test_numeric_crawl_limit_is_parsed():
    settings = Settings(crawl_limit="25")

    assert settings.crawl_limit == 25


def test_mcp_auth_mode_rejects_oauth_or_token_fallback():
    with pytest.raises(ValidationError):
        Settings(mcp_auth_mode="oauth_or_token")