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54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
from .helper import PillowTestCase
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from PIL import Image
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class TestImagePutAlpha(PillowTestCase):
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def test_interface(self):
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im = Image.new("RGBA", (1, 1), (1, 2, 3, 0))
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self.assertEqual(im.getpixel((0, 0)), (1, 2, 3, 0))
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im = Image.new("RGBA", (1, 1), (1, 2, 3))
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self.assertEqual(im.getpixel((0, 0)), (1, 2, 3, 255))
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im.putalpha(Image.new("L", im.size, 4))
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self.assertEqual(im.getpixel((0, 0)), (1, 2, 3, 4))
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im.putalpha(5)
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self.assertEqual(im.getpixel((0, 0)), (1, 2, 3, 5))
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def test_promote(self):
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im = Image.new("L", (1, 1), 1)
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self.assertEqual(im.getpixel((0, 0)), 1)
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im.putalpha(2)
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self.assertEqual(im.mode, 'LA')
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self.assertEqual(im.getpixel((0, 0)), (1, 2))
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im = Image.new("P", (1, 1), 1)
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self.assertEqual(im.getpixel((0, 0)), 1)
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im.putalpha(2)
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self.assertEqual(im.mode, 'PA')
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self.assertEqual(im.getpixel((0, 0)), (1, 2))
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im = Image.new("RGB", (1, 1), (1, 2, 3))
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self.assertEqual(im.getpixel((0, 0)), (1, 2, 3))
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im.putalpha(4)
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self.assertEqual(im.mode, 'RGBA')
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self.assertEqual(im.getpixel((0, 0)), (1, 2, 3, 4))
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def test_readonly(self):
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im = Image.new("RGB", (1, 1), (1, 2, 3))
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im.readonly = 1
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im.putalpha(4)
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self.assertFalse(im.readonly)
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self.assertEqual(im.mode, 'RGBA')
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self.assertEqual(im.getpixel((0, 0)), (1, 2, 3, 4))
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