def METHOD_NAME():
    with setup_workspace('v0_diesel_mac.zip'):
        errs = []
        msgs = []
        # fixme: we should probably have some v1 data to use for tests!
        # have to run v0tov1 first for this old data
        v0tov1(msgs, errs)
        v1tov2(msgs, errs)
        v3tov4(msgs, errs)
        assert len(errs) == 0
        def checker(js):
            return ('gnome.weatherers.weathering_data.WeatheringData' not in js['obj_type'])
        assert check_files(checker