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49 lines
1.4 KiB
Python
49 lines
1.4 KiB
Python
from helper import unittest, PillowTestCase, lena
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import sys
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class TestImagePoint(PillowTestCase):
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def test_sanity(self):
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im = lena()
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self.assertRaises(ValueError, lambda: im.point(list(range(256))))
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im.point(list(range(256))*3)
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im.point(lambda x: x)
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im = im.convert("I")
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self.assertRaises(ValueError, lambda: im.point(list(range(256))))
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im.point(lambda x: x*1)
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im.point(lambda x: x+1)
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im.point(lambda x: x*1+1)
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self.assertRaises(TypeError, lambda: im.point(lambda x: x-1))
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self.assertRaises(TypeError, lambda: im.point(lambda x: x/1))
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def test_16bit_lut(self):
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""" Tests for 16 bit -> 8 bit lut for converting I->L images
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see https://github.com/python-pillow/Pillow/issues/440
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"""
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# This takes _forever_ on PyPy. Open Bug,
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# see https://github.com/python-pillow/Pillow/issues/484
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#self.skipKnownBadTest(msg="Too Slow on pypy", interpreter='pypy')
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im = lena("I")
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im.point(list(range(256))*256, 'L')
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def test_f_lut(self):
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""" Tests for floating point lut of 8bit gray image """
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im = lena('L')
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lut = [0.5 * float(x) for x in range(256)]
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out = im.point(lut, 'F')
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int_lut = [x//2 for x in range(256)]
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self.assert_image_equal(out.convert('L'), im.point(int_lut, 'L'))
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if __name__ == '__main__':
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unittest.main()
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# End of file
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