Pillow/Tests/test_file_mpo.py

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from helper import unittest, PillowTestCase
from io import BytesIO
from PIL import Image
test_files = ["Tests/images/sugarshack.mpo", "Tests/images/frozenpond.mpo"]
class TestFileMpo(PillowTestCase):
def setUp(self):
codecs = dir(Image.core)
if "jpeg_encoder" not in codecs or "jpeg_decoder" not in codecs:
self.skipTest("jpeg support not available")
def frame_roundtrip(self, im, **options):
# Note that for now, there is no MPO saving functionality
out = BytesIO()
im.save(out, "MPO", **options)
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test_bytes = out.tell()
out.seek(0)
im = Image.open(out)
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im.bytes = test_bytes # for testing only
return im
def test_sanity(self):
for test_file in test_files:
im = Image.open(test_file)
im.load()
self.assertEqual(im.mode, "RGB")
self.assertEqual(im.size, (640, 480))
self.assertEqual(im.format, "MPO")
def test_app(self):
for test_file in test_files:
# Test APP/COM reader (@PIL135)
im = Image.open(test_file)
self.assertEqual(im.applist[0][0], 'APP1')
self.assertEqual(im.applist[1][0], 'APP2')
self.assertEqual(im.applist[1][1][:16],
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b'MPF\x00MM\x00*\x00\x00\x00\x08\x00\x03\xb0\x00')
self.assertEqual(len(im.applist), 2)
def test_exif(self):
for test_file in test_files:
im = Image.open(test_file)
info = im._getexif()
self.assertEqual(info[272], 'Nintendo 3DS')
self.assertEqual(info[296], 2)
self.assertEqual(info[34665], 188)
def test_mp(self):
for test_file in test_files:
im = Image.open(test_file)
mpinfo = im._getmp()
self.assertEqual(mpinfo[45056], b'0100')
self.assertEqual(mpinfo[45057], 2)
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def test_mp_attribute(self):
for test_file in test_files:
im = Image.open(test_file)
mpinfo = im._getmp()
frameNumber = 0
for mpentry in mpinfo[45058]:
mpattr = mpentry['Attribute']
if frameNumber:
self.assertFalse(mpattr['RepresentativeImageFlag'])
else:
self.assertTrue(mpattr['RepresentativeImageFlag'])
self.assertFalse(mpattr['DependentParentImageFlag'])
self.assertFalse(mpattr['DependentChildImageFlag'])
self.assertEqual(mpattr['ImageDataFormat'], 'JPEG')
self.assertEqual(mpattr['MPType'],
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'Multi-Frame Image: (Disparity)')
self.assertEqual(mpattr['Reserved'], 0)
frameNumber += 1
def test_seek(self):
for test_file in test_files:
im = Image.open(test_file)
self.assertEqual(im.tell(), 0)
# prior to first image raises an error, both blatant and borderline
self.assertRaises(EOFError, im.seek, -1)
self.assertRaises(EOFError, im.seek, -523)
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# after the final image raises an error,
# both blatant and borderline
self.assertRaises(EOFError, im.seek, 2)
self.assertRaises(EOFError, im.seek, 523)
# bad calls shouldn't change the frame
self.assertEqual(im.tell(), 0)
# this one will work
im.seek(1)
self.assertEqual(im.tell(), 1)
# and this one, too
im.seek(0)
self.assertEqual(im.tell(), 0)
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def test_n_frames(self):
im = Image.open("Tests/images/sugarshack.mpo")
self.assertEqual(im.n_frames, 2)
def test_eoferror(self):
im = Image.open("Tests/images/sugarshack.mpo")
n_frames = im.n_frames
while True:
n_frames -= 1
try:
im.seek(n_frames)
break
except EOFError:
self.assertTrue(im.tell() < n_frames)
def test_image_grab(self):
for test_file in test_files:
im = Image.open(test_file)
self.assertEqual(im.tell(), 0)
im0 = im.tobytes()
im.seek(1)
self.assertEqual(im.tell(), 1)
im1 = im.tobytes()
im.seek(0)
self.assertEqual(im.tell(), 0)
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im02 = im.tobytes()
self.assertEqual(im0, im02)
self.assertNotEqual(im0, im1)
def test_save(self):
# Note that only individual frames can be saved at present
for test_file in test_files:
im = Image.open(test_file)
self.assertEqual(im.tell(), 0)
jpg0 = self.frame_roundtrip(im)
self.assert_image_similar(im, jpg0, 30)
im.seek(1)
self.assertEqual(im.tell(), 1)
jpg1 = self.frame_roundtrip(im)
self.assert_image_similar(im, jpg1, 30)
if __name__ == '__main__':
unittest.main()
# End of file