mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-12-27 10:26:19 +03:00
87 lines
2.8 KiB
Python
87 lines
2.8 KiB
Python
from PIL import Image
|
|
|
|
from .helper import PillowTestCase, hopper
|
|
|
|
TEST_FILE = "Tests/images/hopper.ppm"
|
|
|
|
ORIGINAL_LIMIT = Image.MAX_IMAGE_PIXELS
|
|
|
|
|
|
class TestDecompressionBomb(PillowTestCase):
|
|
def tearDown(self):
|
|
Image.MAX_IMAGE_PIXELS = ORIGINAL_LIMIT
|
|
|
|
def test_no_warning_small_file(self):
|
|
# Implicit assert: no warning.
|
|
# A warning would cause a failure.
|
|
Image.MAX_IMAGE_PIXELS = ORIGINAL_LIMIT
|
|
Image.open(TEST_FILE)
|
|
|
|
def test_no_warning_no_limit(self):
|
|
# Arrange
|
|
# Turn limit off
|
|
Image.MAX_IMAGE_PIXELS = None
|
|
self.assertIsNone(Image.MAX_IMAGE_PIXELS)
|
|
|
|
# Act / Assert
|
|
# Implicit assert: no warning.
|
|
# A warning would cause a failure.
|
|
Image.open(TEST_FILE)
|
|
|
|
def test_warning(self):
|
|
# Set limit to trigger warning on the test file
|
|
Image.MAX_IMAGE_PIXELS = 128 * 128 - 1
|
|
self.assertEqual(Image.MAX_IMAGE_PIXELS, 128 * 128 - 1)
|
|
|
|
self.assert_warning(Image.DecompressionBombWarning, Image.open, TEST_FILE)
|
|
|
|
def test_exception(self):
|
|
# Set limit to trigger exception on the test file
|
|
Image.MAX_IMAGE_PIXELS = 64 * 128 - 1
|
|
self.assertEqual(Image.MAX_IMAGE_PIXELS, 64 * 128 - 1)
|
|
|
|
self.assertRaises(Image.DecompressionBombError, lambda: Image.open(TEST_FILE))
|
|
|
|
def test_exception_ico(self):
|
|
with self.assertRaises(Image.DecompressionBombError):
|
|
Image.open("Tests/images/decompression_bomb.ico")
|
|
|
|
def test_exception_gif(self):
|
|
with self.assertRaises(Image.DecompressionBombError):
|
|
Image.open("Tests/images/decompression_bomb.gif")
|
|
|
|
|
|
class TestDecompressionCrop(PillowTestCase):
|
|
def setUp(self):
|
|
self.src = hopper()
|
|
Image.MAX_IMAGE_PIXELS = self.src.height * self.src.width * 4 - 1
|
|
|
|
def tearDown(self):
|
|
Image.MAX_IMAGE_PIXELS = ORIGINAL_LIMIT
|
|
|
|
def testEnlargeCrop(self):
|
|
# Crops can extend the extents, therefore we should have the
|
|
# same decompression bomb warnings on them.
|
|
box = (0, 0, self.src.width * 2, self.src.height * 2)
|
|
self.assert_warning(Image.DecompressionBombWarning, self.src.crop, box)
|
|
|
|
def test_crop_decompression_checks(self):
|
|
|
|
im = Image.new("RGB", (100, 100))
|
|
|
|
good_values = ((-9999, -9999, -9990, -9990), (-999, -999, -990, -990))
|
|
|
|
warning_values = ((-160, -160, 99, 99), (160, 160, -99, -99))
|
|
|
|
error_values = ((-99909, -99990, 99999, 99999), (99909, 99990, -99999, -99999))
|
|
|
|
for value in good_values:
|
|
self.assertEqual(im.crop(value).size, (9, 9))
|
|
|
|
for value in warning_values:
|
|
self.assert_warning(Image.DecompressionBombWarning, im.crop, value)
|
|
|
|
for value in error_values:
|
|
with self.assertRaises(Image.DecompressionBombError):
|
|
im.crop(value)
|