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https://github.com/python-pillow/Pillow.git
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4de5477b61
With the introduction and use of pytest, it is simple and easy to
execute specific tests in isolation through documented command line
arguments. Either by specifying the module path or through the `-k
EXPRESSION` argument. There is no longer any need to provide the
boilerplate:
if __name__ == '__main__':
unittest.main()
To every test file. It is simply noise.
The pattern remains in test files that aren't named with `test_*` as
those files are not discovered and executed by pytest by default.
126 lines
4.7 KiB
Python
126 lines
4.7 KiB
Python
from .helper import PillowTestCase, hopper
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from PIL import Image
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class TestImageRotate(PillowTestCase):
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def rotate(self, im, mode, angle, center=None, translate=None):
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out = im.rotate(angle, center=center, translate=translate)
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self.assertEqual(out.mode, mode)
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self.assertEqual(out.size, im.size) # default rotate clips output
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out = im.rotate(angle, center=center, translate=translate, expand=1)
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self.assertEqual(out.mode, mode)
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if angle % 180 == 0:
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self.assertEqual(out.size, im.size)
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elif im.size == (0, 0):
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self.assertEqual(out.size, im.size)
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else:
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self.assertNotEqual(out.size, im.size)
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def test_mode(self):
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for mode in ("1", "P", "L", "RGB", "I", "F"):
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im = hopper(mode)
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self.rotate(im, mode, 45)
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def test_angle(self):
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for angle in (0, 90, 180, 270):
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im = Image.open('Tests/images/test-card.png')
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self.rotate(im, im.mode, angle)
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def test_zero(self):
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for angle in (0, 45, 90, 180, 270):
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im = Image.new('RGB', (0, 0))
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self.rotate(im, im.mode, angle)
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def test_resample(self):
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# Target image creation, inspected by eye.
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# >>> im = Image.open('Tests/images/hopper.ppm')
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# >>> im = im.rotate(45, resample=Image.BICUBIC, expand=True)
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# >>> im.save('Tests/images/hopper_45.png')
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target = Image.open('Tests/images/hopper_45.png')
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for (resample, epsilon) in ((Image.NEAREST, 10),
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(Image.BILINEAR, 5),
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(Image.BICUBIC, 0)):
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im = hopper()
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im = im.rotate(45, resample=resample, expand=True)
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self.assert_image_similar(im, target, epsilon)
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def test_center_0(self):
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im = hopper()
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target = Image.open('Tests/images/hopper_45.png')
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target_origin = target.size[1]/2
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target = target.crop((0, target_origin, 128, target_origin + 128))
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im = im.rotate(45, center=(0, 0), resample=Image.BICUBIC)
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self.assert_image_similar(im, target, 15)
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def test_center_14(self):
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im = hopper()
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target = Image.open('Tests/images/hopper_45.png')
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target_origin = target.size[1] / 2 - 14
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target = target.crop((6, target_origin, 128 + 6, target_origin + 128))
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im = im.rotate(45, center=(14, 14), resample=Image.BICUBIC)
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self.assert_image_similar(im, target, 10)
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def test_translate(self):
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im = hopper()
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target = Image.open('Tests/images/hopper_45.png')
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target_origin = (target.size[1] / 2 - 64) - 5
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target = target.crop((target_origin, target_origin,
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target_origin + 128, target_origin + 128))
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im = im.rotate(45, translate=(5, 5), resample=Image.BICUBIC)
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self.assert_image_similar(im, target, 1)
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def test_fastpath_center(self):
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# if the center is -1,-1 and we rotate by 90<=x<=270 the
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# resulting image should be black
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for angle in (90, 180, 270):
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im = hopper().rotate(angle, center=(-1, -1))
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self.assert_image_equal(im, Image.new('RGB', im.size, 'black'))
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def test_fastpath_translate(self):
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# if we post-translate by -128
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# resulting image should be black
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for angle in (0, 90, 180, 270):
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im = hopper().rotate(angle, translate=(-128, -128))
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self.assert_image_equal(im, Image.new('RGB', im.size, 'black'))
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def test_center(self):
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im = hopper()
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self.rotate(im, im.mode, 45, center=(0, 0))
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self.rotate(im, im.mode, 45, translate=(im.size[0]/2, 0))
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self.rotate(im, im.mode, 45, center=(0, 0),
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translate=(im.size[0]/2, 0))
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def test_rotate_no_fill(self):
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im = Image.new('RGB', (100, 100), 'green')
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target = Image.open('Tests/images/rotate_45_no_fill.png')
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im = im.rotate(45)
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self.assert_image_equal(im, target)
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def test_rotate_with_fill(self):
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im = Image.new('RGB', (100, 100), 'green')
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target = Image.open('Tests/images/rotate_45_with_fill.png')
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im = im.rotate(45, fillcolor='white')
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self.assert_image_equal(im, target)
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def test_alpha_rotate_no_fill(self):
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# Alpha images are handled differently internally
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im = Image.new('RGBA', (10, 10), 'green')
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im = im.rotate(45, expand=1)
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corner = im.getpixel((0, 0))
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self.assertEqual(corner, (0, 0, 0, 0))
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def test_alpha_rotate_with_fill(self):
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# Alpha images are handled differently internally
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im = Image.new('RGBA', (10, 10), 'green')
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im = im.rotate(45, expand=1, fillcolor=(255, 0, 0, 255))
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corner = im.getpixel((0, 0))
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self.assertEqual(corner, (255, 0, 0, 255))
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