import os
import unittest
from unittest.mock import patch

from app.config import Config


class ConfigTests(unittest.TestCase):
    def test_rule_update_interval_defaults_to_24_hours(self):
        with patch.dict(os.environ, {}, clear=True):
            self.assertEqual(Config.from_env().rule_update_interval_hours, 24)

    def test_rule_update_interval_can_be_changed_or_disabled(self):
        with patch.dict(os.environ, {"RULE_UPDATE_INTERVAL_HOURS": "6"}, clear=True):
            self.assertEqual(Config.from_env().rule_update_interval_hours, 6)
        with patch.dict(os.environ, {"RULE_UPDATE_INTERVAL_HOURS": "0"}, clear=True):
            self.assertEqual(Config.from_env().rule_update_interval_hours, 0)
        with patch.dict(os.environ, {"RULE_UPDATE_INTERVAL_HOURS": "-5"}, clear=True):
            self.assertEqual(Config.from_env().rule_update_interval_hours, 0)


if __name__ == "__main__":
    unittest.main()