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76 lines
2.2 KiB
Python
76 lines
2.2 KiB
Python
from helper import unittest, PillowTestCase, hopper
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from PIL import Image, SgiImagePlugin
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class TestFileSgi(PillowTestCase):
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def test_rgb(self):
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# Created with ImageMagick then renamed:
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# convert hopper.ppm -compress None sgi:hopper.rgb
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test_file = "Tests/images/hopper.rgb"
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im = Image.open(test_file)
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self.assert_image_equal(im, hopper())
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def test_l(self):
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# Created with ImageMagick
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# convert hopper.ppm -monochrome -compress None sgi:hopper.bw
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test_file = "Tests/images/hopper.bw"
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im = Image.open(test_file)
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self.assert_image_similar(im, hopper('L'), 2)
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def test_rgba(self):
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# Created with ImageMagick:
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# convert transparent.png -compress None transparent.sgi
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test_file = "Tests/images/transparent.sgi"
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im = Image.open(test_file)
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target = Image.open('Tests/images/transparent.png')
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self.assert_image_equal(im, target)
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def test_rle(self):
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# convert hopper.ppm hopper.sgi
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# We don't support RLE compression, this should throw a value error
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test_file = "Tests/images/hopper.sgi"
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with self.assertRaises(ValueError):
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Image.open(test_file)
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def test_invalid_file(self):
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invalid_file = "Tests/images/flower.jpg"
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self.assertRaises(ValueError,
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SgiImagePlugin.SgiImageFile, invalid_file)
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def test_write(self):
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def roundtrip(img):
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out = self.tempfile('temp.sgi')
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img.save(out, format='sgi')
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reloaded = Image.open(out)
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self.assert_image_equal(img, reloaded)
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for mode in ('L', 'RGB', 'RGBA'):
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roundtrip(hopper(mode))
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# Test 1 dimension for an L mode image
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roundtrip(Image.new('L', (10, 1)))
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def test_unsupported_mode(self):
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im = hopper('LA')
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out = self.tempfile('temp.sgi')
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self.assertRaises(ValueError, im.save, out, format='sgi')
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def test_incorrect_number_of_bands(self):
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im = hopper('YCbCr')
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im.mode = 'RGB'
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out = self.tempfile('temp.sgi')
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self.assertRaises(ValueError, im.save, out, format='sgi')
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if __name__ == '__main__':
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unittest.main()
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