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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.
104 lines
3.1 KiB
Python
104 lines
3.1 KiB
Python
from PIL import Image
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from .helper import PillowTestCase, hopper
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class TestImageCrop(PillowTestCase):
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def test_crop(self):
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def crop(mode):
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im = hopper(mode)
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self.assert_image_equal(im.crop(), im)
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cropped = im.crop((50, 50, 100, 100))
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self.assertEqual(cropped.mode, mode)
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self.assertEqual(cropped.size, (50, 50))
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for mode in "1", "P", "L", "RGB", "I", "F":
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crop(mode)
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def test_wide_crop(self):
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def crop(*bbox):
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i = im.crop(bbox)
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h = i.histogram()
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while h and not h[-1]:
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del h[-1]
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return tuple(h)
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im = Image.new("L", (100, 100), 1)
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self.assertEqual(crop(0, 0, 100, 100), (0, 10000))
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self.assertEqual(crop(25, 25, 75, 75), (0, 2500))
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# sides
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self.assertEqual(crop(-25, 0, 25, 50), (1250, 1250))
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self.assertEqual(crop(0, -25, 50, 25), (1250, 1250))
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self.assertEqual(crop(75, 0, 125, 50), (1250, 1250))
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self.assertEqual(crop(0, 75, 50, 125), (1250, 1250))
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self.assertEqual(crop(-25, 25, 125, 75), (2500, 5000))
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self.assertEqual(crop(25, -25, 75, 125), (2500, 5000))
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# corners
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self.assertEqual(crop(-25, -25, 25, 25), (1875, 625))
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self.assertEqual(crop(75, -25, 125, 25), (1875, 625))
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self.assertEqual(crop(75, 75, 125, 125), (1875, 625))
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self.assertEqual(crop(-25, 75, 25, 125), (1875, 625))
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def test_negative_crop(self):
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# Check negative crop size (@PIL171)
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im = Image.new("L", (512, 512))
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im = im.crop((400, 400, 200, 200))
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self.assertEqual(im.size, (0, 0))
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self.assertEqual(len(im.getdata()), 0)
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self.assertRaises(IndexError, lambda: im.getdata()[0])
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def test_crop_float(self):
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# Check cropping floats are rounded to nearest integer
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# https://github.com/python-pillow/Pillow/issues/1744
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# Arrange
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im = Image.new("RGB", (10, 10))
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self.assertEqual(im.size, (10, 10))
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# Act
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cropped = im.crop((0.9, 1.1, 4.2, 5.8))
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# Assert
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self.assertEqual(cropped.size, (3, 5))
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def test_crop_crash(self):
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# Image.crop crashes prepatch with an access violation
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# apparently a use after free on windows, see
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# https://github.com/python-pillow/Pillow/issues/1077
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test_img = "Tests/images/bmp/g/pal8-0.bmp"
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extents = (1, 1, 10, 10)
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# works prepatch
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img = Image.open(test_img)
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img2 = img.crop(extents)
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img2.load()
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# fail prepatch
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img = Image.open(test_img)
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img = img.crop(extents)
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img.load()
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def test_crop_zero(self):
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im = Image.new("RGB", (0, 0), "white")
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cropped = im.crop((0, 0, 0, 0))
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self.assertEqual(cropped.size, (0, 0))
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cropped = im.crop((10, 10, 20, 20))
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self.assertEqual(cropped.size, (10, 10))
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self.assertEqual(cropped.getdata()[0], (0, 0, 0))
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im = Image.new("RGB", (0, 0))
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cropped = im.crop((10, 10, 20, 20))
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self.assertEqual(cropped.size, (10, 10))
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self.assertEqual(cropped.getdata()[2], (0, 0, 0))
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