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56 lines
1.5 KiB
Python
56 lines
1.5 KiB
Python
from helper import unittest, PillowTestCase
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from PIL import Image
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# sample ppm stream
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test_file = "Tests/images/hopper.ppm"
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class TestFilePpm(PillowTestCase):
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def test_sanity(self):
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im = Image.open(test_file)
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im.load()
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self.assertEqual(im.mode, "RGB")
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self.assertEqual(im.size, (128, 128))
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self.assertEqual(im.format, "PPM")
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def test_16bit_pgm(self):
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im = Image.open('Tests/images/16_bit_binary.pgm')
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im.load()
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self.assertEqual(im.mode, 'I')
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self.assertEqual(im.size, (20, 100))
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tgt = Image.open('Tests/images/16_bit_binary_pgm.png')
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self.assert_image_equal(im, tgt)
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def test_16bit_pgm_write(self):
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im = Image.open('Tests/images/16_bit_binary.pgm')
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im.load()
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f = self.tempfile('temp.pgm')
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im.save(f, 'PPM')
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reloaded = Image.open(f)
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self.assert_image_equal(im, reloaded)
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def test_truncated_file(self):
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path = self.tempfile('temp.pgm')
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with open(path, 'w') as f:
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f.write('P6')
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self.assertRaises(ValueError, lambda: Image.open(path))
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def test_neg_ppm(self):
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# Storage.c accepted negative values for xsize, ysize. the
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# internal open_ppm function didn't check for sanity but it
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# has been removed. The default opener doesn't accept negative
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# sizes.
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with self.assertRaises(IOError):
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Image.open('Tests/images/negative_size.ppm')
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if __name__ == '__main__':
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unittest.main()
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