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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.
122 lines
3.4 KiB
Python
122 lines
3.4 KiB
Python
from .helper import unittest, PillowTestCase, hopper
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from PIL import Image
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try:
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from PIL import _webp
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except ImportError:
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_webp = None
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@unittest.skipIf(_webp is None, "WebP support not installed")
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class TestFileWebpAlpha(PillowTestCase):
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def setUp(self):
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if _webp.WebPDecoderBuggyAlpha(self):
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self.skipTest("Buggy early version of WebP installed, "
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"not testing transparency")
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def test_read_rgba(self):
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"""
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Can we read an RGBA mode file without error?
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Does it have the bits we expect?
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"""
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# Generated with `cwebp transparent.png -o transparent.webp`
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file_path = "Tests/images/transparent.webp"
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image = Image.open(file_path)
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self.assertEqual(image.mode, "RGBA")
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self.assertEqual(image.size, (200, 150))
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self.assertEqual(image.format, "WEBP")
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image.load()
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image.getdata()
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image.tobytes()
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target = Image.open('Tests/images/transparent.png')
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self.assert_image_similar(image, target, 20.0)
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def test_write_lossless_rgb(self):
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"""
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Can we write an RGBA mode file with lossless compression without
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error? Does it have the bits we expect?
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"""
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temp_file = self.tempfile("temp.webp")
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# temp_file = "temp.webp"
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pil_image = hopper('RGBA')
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mask = Image.new("RGBA", (64, 64), (128, 128, 128, 128))
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# Add some partially transparent bits:
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pil_image.paste(mask, (0, 0), mask)
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pil_image.save(temp_file, lossless=True)
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image = Image.open(temp_file)
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image.load()
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self.assertEqual(image.mode, "RGBA")
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self.assertEqual(image.size, pil_image.size)
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self.assertEqual(image.format, "WEBP")
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image.load()
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image.getdata()
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self.assert_image_equal(image, pil_image)
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def test_write_rgba(self):
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"""
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Can we write a RGBA mode file to webp without error.
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Does it have the bits we expect?
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"""
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temp_file = self.tempfile("temp.webp")
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pil_image = Image.new("RGBA", (10, 10), (255, 0, 0, 20))
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pil_image.save(temp_file)
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if _webp.WebPDecoderBuggyAlpha(self):
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return
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image = Image.open(temp_file)
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image.load()
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self.assertEqual(image.mode, "RGBA")
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self.assertEqual(image.size, (10, 10))
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self.assertEqual(image.format, "WEBP")
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image.load()
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image.getdata()
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# early versions of webp are known to produce higher deviations:
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# deal with it
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if _webp.WebPDecoderVersion(self) <= 0x201:
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self.assert_image_similar(image, pil_image, 3.0)
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else:
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self.assert_image_similar(image, pil_image, 1.0)
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def test_write_unsupported_mode_PA(self):
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"""
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Saving a palette-based file with transparency to WebP format
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should work, and be similar to the original file.
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"""
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temp_file = self.tempfile("temp.webp")
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file_path = "Tests/images/transparent.gif"
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Image.open(file_path).save(temp_file)
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image = Image.open(temp_file)
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self.assertEqual(image.mode, "RGBA")
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self.assertEqual(image.size, (200, 150))
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self.assertEqual(image.format, "WEBP")
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image.load()
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image.getdata()
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target = Image.open(file_path).convert("RGBA")
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self.assert_image_similar(image, target, 25.0)
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if __name__ == '__main__':
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unittest.main()
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