Function test_empty_imshow

lib/matplotlib/tests/test_image.py:1126–1135

(make_norm)

     lambda: colors.SymLogNorm(1),
     lambda: colors.PowerNorm(1)])
def test_empty_imshow(make_norm):
    fig, ax = plt.subplots()
    with pytest.warns(UserWarning,
                      match="Attempting to set identical low and high xlims"):
        im = ax.imshow([[]], norm=make_norm())
    im.set_extent([-5, 5, -5, 5])
    fig.canvas.draw()

    with pytest.raises(RuntimeError):
        im.make_image(fig.canvas.get_renderer())


def test_imshow_float16():