Method test_key_attribute

Lib/test/test_zoneinfo/test_zoneinfo.py:199–222

(self)

            self.assertRegex(repr(zi_ff_nk), class_name)

    def test_key_attribute(self):
        key = next(iter(self.zones()))

        def from_file_nokey(key):
            with open(self.zoneinfo_data.path_from_key(key), "rb") as f:
                return self.klass.from_file(f)

        constructors = (
            ("Primary constructor", self.klass, key),
            ("no_cache", self.klass.no_cache, key),
            ("from_file", from_file_nokey, None),
        )

        for msg, constructor, expected in constructors:
            zi = constructor(key)

            # Ensure that the key attribute is set to the input to ``key``
            with self.subTest(msg):
                self.assertEqual(zi.key, expected)

            # Ensure that the key attribute is read-only
            with self.subTest(f"{msg}: readonly"):
                with self.assertRaises(AttributeError):
                    zi.key = "Some/Value"

    def test_bad_keys(self):
        bad_keys = [