Class Rot13

tests/test_frames.py:174–185

    def test_extensions(self):
        class Rot13:
            @staticmethod
            def encode(frame):
                assert frame.opcode == OP_TEXT
                text = frame.data.decode()
                data = codecs.encode(text, "rot13").encode()
                return dataclasses.replace(frame, data=data)

            # This extensions is symmetrical.
            @staticmethod
            def decode(frame, *, max_size=None):
                return Rot13.encode(frame)

        self.assertFrameData(
            Frame(OP_TEXT, b"hello"),