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https://github.com/python-pillow/Pillow.git
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4de5477b61
With the introduction and use of pytest, it is simple and easy to
execute specific tests in isolation through documented command line
arguments. Either by specifying the module path or through the `-k
EXPRESSION` argument. There is no longer any need to provide the
boilerplate:
if __name__ == '__main__':
unittest.main()
To every test file. It is simply noise.
The pattern remains in test files that aren't named with `test_*` as
those files are not discovered and executed by pytest by default.
113 lines
3.0 KiB
Python
113 lines
3.0 KiB
Python
from io import BytesIO
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from .helper import PillowTestCase
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from PIL import Image, DdsImagePlugin
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TEST_FILE_DXT1 = "Tests/images/dxt1-rgb-4bbp-noalpha_MipMaps-1.dds"
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TEST_FILE_DXT3 = "Tests/images/dxt3-argb-8bbp-explicitalpha_MipMaps-1.dds"
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TEST_FILE_DXT5 = "Tests/images/dxt5-argb-8bbp-interpolatedalpha_MipMaps-1.dds"
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TEST_FILE_DX10_BC7 = "Tests/images/bc7-argb-8bpp_MipMaps-1.dds"
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class TestFileDds(PillowTestCase):
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"""Test DdsImagePlugin"""
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def test_sanity_dxt1(self):
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"""Check DXT1 images can be opened"""
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target = Image.open(TEST_FILE_DXT1.replace('.dds', '.png'))
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im = Image.open(TEST_FILE_DXT1)
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im.load()
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self.assertEqual(im.format, "DDS")
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self.assertEqual(im.mode, "RGBA")
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self.assertEqual(im.size, (256, 256))
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self.assert_image_equal(target.convert('RGBA'), im)
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def test_sanity_dxt5(self):
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"""Check DXT5 images can be opened"""
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target = Image.open(TEST_FILE_DXT5.replace('.dds', '.png'))
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im = Image.open(TEST_FILE_DXT5)
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im.load()
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self.assertEqual(im.format, "DDS")
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self.assertEqual(im.mode, "RGBA")
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self.assertEqual(im.size, (256, 256))
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self.assert_image_equal(target, im)
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def test_sanity_dxt3(self):
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"""Check DXT3 images can be opened"""
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target = Image.open(TEST_FILE_DXT3.replace('.dds', '.png'))
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im = Image.open(TEST_FILE_DXT3)
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im.load()
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self.assertEqual(im.format, "DDS")
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self.assertEqual(im.mode, "RGBA")
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self.assertEqual(im.size, (256, 256))
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self.assert_image_equal(target, im)
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def test_dx10_bc7(self):
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"""Check DX10 images can be opened"""
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target = Image.open(TEST_FILE_DX10_BC7.replace('.dds', '.png'))
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im = Image.open(TEST_FILE_DX10_BC7)
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im.load()
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self.assertEqual(im.format, "DDS")
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self.assertEqual(im.mode, "RGBA")
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self.assertEqual(im.size, (256, 256))
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self.assert_image_equal(target, im)
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def test__validate_true(self):
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"""Check valid prefix"""
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# Arrange
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prefix = b"DDS etc"
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# Act
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output = DdsImagePlugin._validate(prefix)
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# Assert
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self.assertTrue(output)
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def test__validate_false(self):
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"""Check invalid prefix"""
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# Arrange
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prefix = b"something invalid"
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# Act
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output = DdsImagePlugin._validate(prefix)
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# Assert
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self.assertFalse(output)
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def test_short_header(self):
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""" Check a short header"""
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with open(TEST_FILE_DXT5, 'rb') as f:
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img_file = f.read()
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def short_header():
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Image.open(BytesIO(img_file[:119]))
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self.assertRaises(IOError, short_header)
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def test_short_file(self):
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""" Check that the appropriate error is thrown for a short file"""
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with open(TEST_FILE_DXT5, 'rb') as f:
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img_file = f.read()
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def short_file():
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im = Image.open(BytesIO(img_file[:-100]))
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im.load()
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self.assertRaises(IOError, short_file)
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