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https://github.com/python-pillow/Pillow.git
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7da17ad41e
The previous test configuration made it difficult to run a single test with the pytest CLI. There were two major issues: - The Tests directory was not a package. It now includes a __init__.py file and imports from other tests modules are done with relative imports. - setup.cfg always specified the Tests directory. So even if a specific test were specified as a CLI arg, this configuration would also always include all tests. This configuration has been removed to allow specifying a single test on the command line. Contributors can now run specific tests with a single command such as: $ tox -e py37 -- Tests/test_file_pdf.py::TestFilePdf.test_rgb This makes it easy and faster to iterate on a single test failure and is very familiar to those that have previously used tox and pytest. When running tox or pytest with no arguments, they still discover and runs all tests in the Tests directory.
90 lines
2.7 KiB
Python
90 lines
2.7 KiB
Python
from .helper import unittest, PillowTestCase, hopper
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from PIL import Image
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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,
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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,
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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,
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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),
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(-999, -999, -990, -990))
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warning_values = ((-160, -160, 99, 99),
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(160, 160, -99, -99))
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error_values = ((-99909, -99990, 99999, 99999),
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(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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if __name__ == '__main__':
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unittest.main()
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