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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.
149 lines
5.7 KiB
Python
149 lines
5.7 KiB
Python
from . import helper
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from .helper import PillowTestCase
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from PIL.Image import (FLIP_LEFT_RIGHT, FLIP_TOP_BOTTOM, ROTATE_90, ROTATE_180,
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ROTATE_270, TRANSPOSE, TRANSVERSE)
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class TestImageTranspose(PillowTestCase):
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hopper = {
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'L': helper.hopper('L').crop((0, 0, 121, 127)).copy(),
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'RGB': helper.hopper('RGB').crop((0, 0, 121, 127)).copy(),
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}
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def test_flip_left_right(self):
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def transpose(mode):
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im = self.hopper[mode]
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out = im.transpose(FLIP_LEFT_RIGHT)
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self.assertEqual(out.mode, mode)
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self.assertEqual(out.size, im.size)
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x, y = im.size
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self.assertEqual(im.getpixel((1, 1)), out.getpixel((x-2, 1)))
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self.assertEqual(im.getpixel((x-2, 1)), out.getpixel((1, 1)))
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self.assertEqual(im.getpixel((1, y-2)), out.getpixel((x-2, y-2)))
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self.assertEqual(im.getpixel((x-2, y-2)), out.getpixel((1, y-2)))
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for mode in ("L", "RGB"):
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transpose(mode)
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def test_flip_top_bottom(self):
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def transpose(mode):
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im = self.hopper[mode]
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out = im.transpose(FLIP_TOP_BOTTOM)
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self.assertEqual(out.mode, mode)
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self.assertEqual(out.size, im.size)
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x, y = im.size
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self.assertEqual(im.getpixel((1, 1)), out.getpixel((1, y-2)))
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self.assertEqual(im.getpixel((x-2, 1)), out.getpixel((x-2, y-2)))
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self.assertEqual(im.getpixel((1, y-2)), out.getpixel((1, 1)))
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self.assertEqual(im.getpixel((x-2, y-2)), out.getpixel((x-2, 1)))
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for mode in ("L", "RGB"):
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transpose(mode)
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def test_rotate_90(self):
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def transpose(mode):
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im = self.hopper[mode]
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out = im.transpose(ROTATE_90)
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self.assertEqual(out.mode, mode)
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self.assertEqual(out.size, im.size[::-1])
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x, y = im.size
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self.assertEqual(im.getpixel((1, 1)), out.getpixel((1, x-2)))
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self.assertEqual(im.getpixel((x-2, 1)), out.getpixel((1, 1)))
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self.assertEqual(im.getpixel((1, y-2)), out.getpixel((y-2, x-2)))
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self.assertEqual(im.getpixel((x-2, y-2)), out.getpixel((y-2, 1)))
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for mode in ("L", "RGB"):
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transpose(mode)
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def test_rotate_180(self):
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def transpose(mode):
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im = self.hopper[mode]
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out = im.transpose(ROTATE_180)
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self.assertEqual(out.mode, mode)
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self.assertEqual(out.size, im.size)
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x, y = im.size
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self.assertEqual(im.getpixel((1, 1)), out.getpixel((x-2, y-2)))
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self.assertEqual(im.getpixel((x-2, 1)), out.getpixel((1, y-2)))
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self.assertEqual(im.getpixel((1, y-2)), out.getpixel((x-2, 1)))
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self.assertEqual(im.getpixel((x-2, y-2)), out.getpixel((1, 1)))
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for mode in ("L", "RGB"):
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transpose(mode)
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def test_rotate_270(self):
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def transpose(mode):
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im = self.hopper[mode]
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out = im.transpose(ROTATE_270)
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self.assertEqual(out.mode, mode)
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self.assertEqual(out.size, im.size[::-1])
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x, y = im.size
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self.assertEqual(im.getpixel((1, 1)), out.getpixel((y-2, 1)))
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self.assertEqual(im.getpixel((x-2, 1)), out.getpixel((y-2, x-2)))
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self.assertEqual(im.getpixel((1, y-2)), out.getpixel((1, 1)))
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self.assertEqual(im.getpixel((x-2, y-2)), out.getpixel((1, x-2)))
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for mode in ("L", "RGB"):
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transpose(mode)
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def test_transpose(self):
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def transpose(mode):
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im = self.hopper[mode]
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out = im.transpose(TRANSPOSE)
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self.assertEqual(out.mode, mode)
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self.assertEqual(out.size, im.size[::-1])
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x, y = im.size
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self.assertEqual(im.getpixel((1, 1)), out.getpixel((1, 1)))
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self.assertEqual(im.getpixel((x-2, 1)), out.getpixel((1, x-2)))
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self.assertEqual(im.getpixel((1, y-2)), out.getpixel((y-2, 1)))
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self.assertEqual(im.getpixel((x-2, y-2)), out.getpixel((y-2, x-2)))
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for mode in ("L", "RGB"):
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transpose(mode)
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def test_tranverse(self):
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def transpose(mode):
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im = self.hopper[mode]
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out = im.transpose(TRANSVERSE)
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self.assertEqual(out.mode, mode)
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self.assertEqual(out.size, im.size[::-1])
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x, y = im.size
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self.assertEqual(im.getpixel((1, 1)), out.getpixel((y-2, x-2)))
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self.assertEqual(im.getpixel((x-2, 1)), out.getpixel((y-2, 1)))
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self.assertEqual(im.getpixel((1, y-2)), out.getpixel((1, x-2)))
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self.assertEqual(im.getpixel((x-2, y-2)), out.getpixel((1, 1)))
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for mode in ("L", "RGB"):
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transpose(mode)
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def test_roundtrip(self):
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im = self.hopper['L']
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def transpose(first, second):
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return im.transpose(first).transpose(second)
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self.assert_image_equal(
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im, transpose(FLIP_LEFT_RIGHT, FLIP_LEFT_RIGHT))
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self.assert_image_equal(
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im, transpose(FLIP_TOP_BOTTOM, FLIP_TOP_BOTTOM))
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self.assert_image_equal(im, transpose(ROTATE_90, ROTATE_270))
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self.assert_image_equal(im, transpose(ROTATE_180, ROTATE_180))
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self.assert_image_equal(
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im.transpose(TRANSPOSE), transpose(ROTATE_90, FLIP_TOP_BOTTOM))
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self.assert_image_equal(
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im.transpose(TRANSPOSE), transpose(ROTATE_270, FLIP_LEFT_RIGHT))
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self.assert_image_equal(
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im.transpose(TRANSVERSE), transpose(ROTATE_90, FLIP_LEFT_RIGHT))
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self.assert_image_equal(
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im.transpose(TRANSVERSE), transpose(ROTATE_270, FLIP_TOP_BOTTOM))
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self.assert_image_equal(
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im.transpose(TRANSVERSE), transpose(ROTATE_180, TRANSPOSE))
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