Class Empty

tests/test_streams.py:213–215

def test_message_len_empty_string():
    @dataclass
    class Empty(betterproto.Message):
        string: str = betterproto.string_field(1, "group")
        integer: int = betterproto.int32_field(2, "group")

    empty = Empty().from_dict({"string": ""})
    assert len(empty) == len(bytes(empty))