from __future__ import annotations

import os
from unittest import TestCase
from unittest.mock import patch

import server


class ServerConfigurationTests(TestCase):
    @patch.dict(os.environ, {"APP_HOST": "0.0.0.0", "APP_PORT": "8080"})
    @patch("server.ThreadingHTTPServer")
    def test_main_uses_configured_host_and_port(self, http_server) -> None:
        server.main()

        http_server.assert_called_once_with(("0.0.0.0", 8080), server.AppHandler)
        http_server.return_value.serve_forever.assert_called_once_with()