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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.
130 lines
4.8 KiB
Python
130 lines
4.8 KiB
Python
from .helper import unittest, 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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if __name__ == '__main__':
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unittest.main()
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