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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.
158 lines
5.0 KiB
Python
158 lines
5.0 KiB
Python
from .helper import unittest, PillowTestCase
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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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HAVE_WEBP = True
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except ImportError:
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HAVE_WEBP = False
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class TestFileWebpAnimation(PillowTestCase):
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def setUp(self):
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if not HAVE_WEBP:
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self.skipTest('WebP support not installed')
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return
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if not _webp.HAVE_WEBPANIM:
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self.skipTest("WebP library does not contain animation support, "
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"not testing animation")
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def test_n_frames(self):
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"""
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Ensure that WebP format sets n_frames and is_animated
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attributes correctly.
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"""
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im = Image.open("Tests/images/hopper.webp")
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self.assertEqual(im.n_frames, 1)
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self.assertFalse(im.is_animated)
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im = Image.open("Tests/images/iss634.webp")
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self.assertEqual(im.n_frames, 42)
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self.assertTrue(im.is_animated)
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def test_write_animation_L(self):
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"""
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Convert an animated GIF to animated WebP, then compare the
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frame count, and first and last frames to ensure they're
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visually similar.
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"""
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orig = Image.open("Tests/images/iss634.gif")
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self.assertGreater(orig.n_frames, 1)
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temp_file = self.tempfile("temp.webp")
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orig.save(temp_file, save_all=True)
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im = Image.open(temp_file)
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self.assertEqual(im.n_frames, orig.n_frames)
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# Compare first and last frames to the original animated GIF
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orig.load()
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im.load()
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self.assert_image_similar(im, orig.convert("RGBA"), 25.0)
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orig.seek(orig.n_frames-1)
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im.seek(im.n_frames-1)
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orig.load()
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im.load()
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self.assert_image_similar(im, orig.convert("RGBA"), 25.0)
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def test_write_animation_RGB(self):
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"""
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Write an animated WebP from RGB frames, and ensure the frames
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are visually similar to the originals.
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"""
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def check(temp_file):
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im = Image.open(temp_file)
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self.assertEqual(im.n_frames, 2)
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# Compare first frame to original
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im.load()
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self.assert_image_equal(im, frame1.convert("RGBA"))
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# Compare second frame to original
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im.seek(1)
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im.load()
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self.assert_image_equal(im, frame2.convert("RGBA"))
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frame1 = Image.open('Tests/images/anim_frame1.webp')
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frame2 = Image.open('Tests/images/anim_frame2.webp')
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temp_file1 = self.tempfile("temp.webp")
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frame1.copy().save(temp_file1,
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save_all=True, append_images=[frame2],
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lossless=True)
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check(temp_file1)
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# Tests appending using a generator
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def imGenerator(ims):
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for im in ims:
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yield im
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temp_file2 = self.tempfile("temp_generator.webp")
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frame1.copy().save(temp_file2,
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save_all=True, append_images=imGenerator([frame2]),
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lossless=True)
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check(temp_file2)
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def test_timestamp_and_duration(self):
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"""
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Try passing a list of durations, and make sure the encoded
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timestamps and durations are correct.
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"""
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durations = [0, 10, 20, 30, 40]
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temp_file = self.tempfile("temp.webp")
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frame1 = Image.open('Tests/images/anim_frame1.webp')
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frame2 = Image.open('Tests/images/anim_frame2.webp')
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frame1.save(temp_file, save_all=True,
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append_images=[frame2, frame1, frame2, frame1],
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duration=durations)
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im = Image.open(temp_file)
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self.assertEqual(im.n_frames, 5)
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self.assertTrue(im.is_animated)
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# Check that timestamps and durations match original values specified
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ts = 0
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for frame in range(im.n_frames):
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im.seek(frame)
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im.load()
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self.assertEqual(im.info["duration"], durations[frame])
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self.assertEqual(im.info["timestamp"], ts)
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ts += durations[frame]
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def test_seeking(self):
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"""
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Create an animated WebP file, and then try seeking through
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frames in reverse-order, verifying the timestamps and durations
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are correct.
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"""
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dur = 33
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temp_file = self.tempfile("temp.webp")
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frame1 = Image.open('Tests/images/anim_frame1.webp')
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frame2 = Image.open('Tests/images/anim_frame2.webp')
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frame1.save(temp_file, save_all=True,
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append_images=[frame2, frame1, frame2, frame1],
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duration=dur)
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im = Image.open(temp_file)
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self.assertEqual(im.n_frames, 5)
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self.assertTrue(im.is_animated)
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# Traverse frames in reverse, checking timestamps and durations
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ts = dur * (im.n_frames-1)
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for frame in reversed(range(im.n_frames)):
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im.seek(frame)
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im.load()
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self.assertEqual(im.info["duration"], dur)
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self.assertEqual(im.info["timestamp"], ts)
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ts -= dur
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if __name__ == '__main__':
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unittest.main()
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