Tests dispose and transparency for animated gifs

This commit is contained in:
Lars Jørgen Solberg 2014-07-07 20:47:18 +02:00
parent 925277cbfc
commit 5fa2794386
5 changed files with 44 additions and 0 deletions

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Tests/images/iss634.gif Normal file

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@ -106,6 +106,50 @@ class TestFileGif(PillowTestCase):
GifImagePlugin._save_netpbm(img, 0, tempfile)
self.assert_image_similar(img, Image.open(tempfile).convert("L"), 0)
def test_seek(self):
img = Image.open("Tests/images/dispose_none.gif")
framecount = 0
try:
while True:
framecount += 1
img.seek(img.tell() +1)
except EOFError:
assert(framecount == 5)
def test_dispose_none(self):
img = Image.open("Tests/images/dispose_none.gif")
try:
while True:
img.seek(img.tell() +1)
assert(img.disposal_method == 1)
except EOFError:
pass
def test_dispose_background(self):
img = Image.open("Tests/images/dispose_bgnd.gif")
try:
while True:
img.seek(img.tell() +1)
assert(img.disposal_method == 2)
except EOFError:
pass
def test_dispose_previous(self):
img = Image.open("Tests/images/dispose_prev.gif")
try:
while True:
img.seek(img.tell() +1)
assert(img.disposal_method == 3)
except EOFError:
pass
def test_iss634(self):
img = Image.open("Tests/images/iss634.gif")
# seek to the second frame
img.seek(img.tell() +1)
# all transparent pixels should be replaced with the color from the first frame
assert(img.histogram()[img.info['transparency']] == 0)
if __name__ == '__main__':
unittest.main()