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53 lines
1.3 KiB
Python
53 lines
1.3 KiB
Python
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from tester import *
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from PIL import Image
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from PIL import ImageStat
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def test_sanity():
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im = lena()
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st = ImageStat.Stat(im)
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st = ImageStat.Stat(im.histogram())
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st = ImageStat.Stat(im, Image.new("1", im.size, 1))
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assert_no_exception(lambda: st.extrema)
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assert_no_exception(lambda: st.sum)
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assert_no_exception(lambda: st.mean)
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assert_no_exception(lambda: st.median)
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assert_no_exception(lambda: st.rms)
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assert_no_exception(lambda: st.sum2)
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assert_no_exception(lambda: st.var)
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assert_no_exception(lambda: st.stddev)
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assert_exception(AttributeError, lambda: st.spam)
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assert_exception(TypeError, lambda: ImageStat.Stat(1))
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def test_lena():
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im = lena()
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st = ImageStat.Stat(im)
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# verify a few values
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assert_equal(st.extrema[0], (61, 255))
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assert_equal(st.median[0], 197)
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assert_equal(st.sum[0], 2954416)
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assert_equal(st.sum[1], 2027250)
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assert_equal(st.sum[2], 1727331)
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def test_constant():
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im = Image.new("L", (128, 128), 128)
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st = ImageStat.Stat(im)
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assert_equal(st.extrema[0], (128, 128))
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assert_equal(st.sum[0], 128**3)
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assert_equal(st.sum2[0], 128**4)
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assert_equal(st.mean[0], 128)
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assert_equal(st.median[0], 128)
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assert_equal(st.rms[0], 128)
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assert_equal(st.var[0], 0)
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assert_equal(st.stddev[0], 0)
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