import unittest

from app import Handler, HOST


class AppServerTests(unittest.TestCase):
    def test_server_defaults_to_loopback(self):
        self.assertEqual(HOST, "127.0.0.1")

    def test_certificate_response_interpretation(self):
        cases = [
            (b"true", True),
            (b"false", False),
            (b'{"verified": false}', False),
            (b'{"isValid": true}', True),
            (b'{"unknown": true}', None),
            (b"", None),
            (b"not-json", None),
        ]
        for body, expected in cases:
            with self.subTest(body=body):
                self.assertIs(Handler._interpret_verify_body(body), expected)


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