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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.
65 lines
2.4 KiB
Python
65 lines
2.4 KiB
Python
from PIL import Image
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from .helper import PillowTestCase, hopper
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class TestImageQuantize(PillowTestCase):
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def test_sanity(self):
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image = hopper()
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converted = image.quantize()
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self.assert_image(converted, "P", converted.size)
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self.assert_image_similar(converted.convert("RGB"), image, 10)
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image = hopper()
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converted = image.quantize(palette=hopper("P"))
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self.assert_image(converted, "P", converted.size)
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self.assert_image_similar(converted.convert("RGB"), image, 60)
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def test_libimagequant_quantize(self):
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image = hopper()
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try:
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converted = image.quantize(100, Image.LIBIMAGEQUANT)
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except ValueError as ex:
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if "dependency" in str(ex).lower():
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self.skipTest("libimagequant support not available")
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else:
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raise
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self.assert_image(converted, "P", converted.size)
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self.assert_image_similar(converted.convert("RGB"), image, 15)
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self.assertEqual(len(converted.getcolors()), 100)
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def test_octree_quantize(self):
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image = hopper()
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converted = image.quantize(100, Image.FASTOCTREE)
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self.assert_image(converted, "P", converted.size)
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self.assert_image_similar(converted.convert("RGB"), image, 20)
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self.assertEqual(len(converted.getcolors()), 100)
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def test_rgba_quantize(self):
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image = hopper("RGBA")
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self.assertRaises(ValueError, image.quantize, method=0)
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self.assertEqual(image.quantize().convert().mode, "RGBA")
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def test_quantize(self):
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image = Image.open("Tests/images/caption_6_33_22.png").convert("RGB")
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converted = image.quantize()
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self.assert_image(converted, "P", converted.size)
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self.assert_image_similar(converted.convert("RGB"), image, 1)
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def test_quantize_no_dither(self):
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image = hopper()
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palette = Image.open("Tests/images/caption_6_33_22.png").convert("P")
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converted = image.quantize(dither=0, palette=palette)
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self.assert_image(converted, "P", converted.size)
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def test_quantize_dither_diff(self):
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image = hopper()
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palette = Image.open("Tests/images/caption_6_33_22.png").convert("P")
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dither = image.quantize(dither=1, palette=palette)
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nodither = image.quantize(dither=0, palette=palette)
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self.assertNotEqual(dither.tobytes(), nodither.tobytes())
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