def METHOD_NAME(self):
    # test with different alpha
    self.linescatterplot.unselected_alpha = 0.4
    self.linescatterplot.index.metadata["selections"] = [
        (arange(10) % 2 == 0),
    ]
    gc = PlotGraphicsContext(self.size)
    gc.render_component(self.linescatterplot)
    actual = gc.bmp_array[:, :, :]
    self.assertFalse(alltrue(actual == 255))