def METHOD_NAME(self):
    F1.create_plotly_piechart_fig(
        title_of_plot="a_title",
        names=["costs1", "costs2"],
        values=[0.2, 0.8],
        file_name="filename.png",
        file_path=OUTPUT_PATH,
    )
    assert os.path.exists(os.path.join(OUTPUT_PATH, "filename.png")) is True