def METHOD_NAME(example_event, example_subarray, tmp_path):
    """Test we set an image"""
    from ctapipe.visualization.bokeh import CameraDisplay
    t = list(example_event.r0.tel.keys())[0]
    geom = example_subarray.tel[t].camera.geometry
    image = np.ones(geom.n_pixels)
    display = CameraDisplay(geom, image)
    assert np.all(display.image == image)
    display.image = np.random.normal(size=geom.n_pixels)
    assert np.all(display.image == image)
    output_path = tmp_path / "test.html"
    output_file(output_path)
    save(display.figure, filename=output_path)