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62 lines
1.5 KiB
Python
62 lines
1.5 KiB
Python
from helper import unittest, PillowTestCase, hopper
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from PIL import Image
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from PIL import ImageStat
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class TestImageStat(PillowTestCase):
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def test_sanity(self):
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im = hopper()
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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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# Check these run. Exceptions will cause failures.
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st.extrema
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st.sum
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st.mean
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st.median
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st.rms
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st.sum2
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st.var
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st.stddev
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self.assertRaises(AttributeError, lambda: st.spam)
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self.assertRaises(TypeError, ImageStat.Stat, 1)
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def test_hopper(self):
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im = hopper()
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st = ImageStat.Stat(im)
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# verify a few values
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self.assertEqual(st.extrema[0], (0, 255))
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self.assertEqual(st.median[0], 72)
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self.assertEqual(st.sum[0], 1470218)
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self.assertEqual(st.sum[1], 1311896)
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self.assertEqual(st.sum[2], 1563008)
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def test_constant(self):
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im = Image.new("L", (128, 128), 128)
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st = ImageStat.Stat(im)
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self.assertEqual(st.extrema[0], (128, 128))
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self.assertEqual(st.sum[0], 128**3)
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self.assertEqual(st.sum2[0], 128**4)
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self.assertEqual(st.mean[0], 128)
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self.assertEqual(st.median[0], 128)
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self.assertEqual(st.rms[0], 128)
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self.assertEqual(st.var[0], 0)
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self.assertEqual(st.stddev[0], 0)
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if __name__ == '__main__':
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unittest.main()
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