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d50445ff30
Similar to the recent adoption of Black. isort is a Python utility to sort imports alphabetically and automatically separate into sections. By using isort, contributors can quickly and automatically conform to the projects style without thinking. Just let the tool do it. Uses the configuration recommended by the Black to avoid conflicts of style. Rewrite TestImageQt.test_deprecated to no rely on import order.
78 lines
2.4 KiB
Python
78 lines
2.4 KiB
Python
from PIL import Image
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from .helper import PillowTestCase, hopper
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TEST_FILE = "Tests/images/hopper.ppm"
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ORIGINAL_LIMIT = Image.MAX_IMAGE_PIXELS
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class TestDecompressionBomb(PillowTestCase):
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def tearDown(self):
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Image.MAX_IMAGE_PIXELS = ORIGINAL_LIMIT
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def test_no_warning_small_file(self):
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# Implicit assert: no warning.
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# A warning would cause a failure.
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Image.open(TEST_FILE)
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def test_no_warning_no_limit(self):
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# Arrange
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# Turn limit off
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Image.MAX_IMAGE_PIXELS = None
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self.assertIsNone(Image.MAX_IMAGE_PIXELS)
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# Act / Assert
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# Implicit assert: no warning.
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# A warning would cause a failure.
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Image.open(TEST_FILE)
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def test_warning(self):
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# Set limit to trigger warning on the test file
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Image.MAX_IMAGE_PIXELS = 128 * 128 - 1
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self.assertEqual(Image.MAX_IMAGE_PIXELS, 128 * 128 - 1)
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self.assert_warning(Image.DecompressionBombWarning, Image.open, TEST_FILE)
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def test_exception(self):
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# Set limit to trigger exception on the test file
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Image.MAX_IMAGE_PIXELS = 64 * 128 - 1
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self.assertEqual(Image.MAX_IMAGE_PIXELS, 64 * 128 - 1)
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self.assertRaises(Image.DecompressionBombError, lambda: Image.open(TEST_FILE))
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class TestDecompressionCrop(PillowTestCase):
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def setUp(self):
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self.src = hopper()
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Image.MAX_IMAGE_PIXELS = self.src.height * self.src.width * 4 - 1
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def tearDown(self):
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Image.MAX_IMAGE_PIXELS = ORIGINAL_LIMIT
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def testEnlargeCrop(self):
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# Crops can extend the extents, therefore we should have the
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# same decompression bomb warnings on them.
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box = (0, 0, self.src.width * 2, self.src.height * 2)
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self.assert_warning(Image.DecompressionBombWarning, self.src.crop, box)
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def test_crop_decompression_checks(self):
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im = Image.new("RGB", (100, 100))
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good_values = ((-9999, -9999, -9990, -9990), (-999, -999, -990, -990))
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warning_values = ((-160, -160, 99, 99), (160, 160, -99, -99))
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error_values = ((-99909, -99990, 99999, 99999), (99909, 99990, -99999, -99999))
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for value in good_values:
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self.assertEqual(im.crop(value).size, (9, 9))
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for value in warning_values:
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self.assert_warning(Image.DecompressionBombWarning, im.crop, value)
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for value in error_values:
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with self.assertRaises(Image.DecompressionBombError):
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im.crop(value)
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