Method test_custom_invalid_serializer

Lib/test/test_shelve.py:228–246

(self, serialized)

    @subTests("serialized", [None, ["invalid type"]])
    def test_custom_invalid_serializer(self, serialized):
        test_dir = f"{self.dirname}_{id(serialized)}"
        os.mkdir(test_dir)
        self.addCleanup(os_helper.rmtree, test_dir)
        test_fn = os.path.join(test_dir, "shelftemp.db")

        def serializer(obj, protocol=None):
            return serialized

        def deserializer(data):
            return data.decode("utf-8")

        # Since the serializer returns an invalid type or None,
        # dbm.error is raised by dbm.sqlite3 and TypeError is raised
        # by other backends.
        with self.assertRaises((TypeError, dbm.error)):
            with shelve.open(test_fn, serializer=serializer,
                             deserializer=deserializer) as s:
                s["foo"] = "bar"

    def test_custom_incomplete_deserializer(self):
        os.mkdir(self.dirname)