Pillow/Tests/test_file_sgi.py
2017-09-01 21:05:40 +10:00

76 lines
2.2 KiB
Python

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