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+import pytest%0Aimport cv2%0Afrom plotnine import ggplot%0Afrom plantcv.plantcv.visualize import obj_size_ecdf%0A%0A%0A@pytest.mark.parametrize(%22title%22, %5B%22Include Title%22, None%5D)%0Adef test_obj_size_ecdf(title, visualize_test_data):%0A    mask = cv2.imread(visualize_test_data.small_bin_img, -1)%0A    fig_ecdf = obj_size_ecdf(mask=mask, title=title)%0A    assert isinstance(fig_ecdf, ggplot)%0A

Create obj_size_ecdf tests module