def METHOD_NAME(
    self, chart_command
):
    expected = pd.DataFrame(
        {
            "b": [21, 22, 23, 21, 22, 23],
            "color--p5bJXXpQgvPz6yvQMFiy": ["a", "a", "a", "c", "c", "c"],
            "value--p5bJXXpQgvPz6yvQMFiy": [11, 12, 13, 31, 32, 33],
        }
    )
    element = chart_command(DATAFRAME, x="b", y=["a", "c"], color=["#f00", "#0f0"])
    element._arrow_add_rows(NEW_ROWS)
    proto = bytes_to_data_frame(
        self.get_delta_from_queue().arrow_add_rows.data.data
    )
    pd.testing.assert_frame_equal(proto, expected)