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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.
61 lines
1.7 KiB
Python
61 lines
1.7 KiB
Python
from .helper import PillowTestCase, hopper
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from PIL import TiffImagePlugin, Image
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from PIL.TiffImagePlugin import IFDRational
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from fractions import Fraction
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class Test_IFDRational(PillowTestCase):
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def _test_equal(self, num, denom, target):
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t = IFDRational(num, denom)
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self.assertEqual(target, t)
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self.assertEqual(t, target)
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def test_sanity(self):
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self._test_equal(1, 1, 1)
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self._test_equal(1, 1, Fraction(1, 1))
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self._test_equal(2, 2, 1)
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self._test_equal(1.0, 1, Fraction(1, 1))
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self._test_equal(Fraction(1, 1), 1, Fraction(1, 1))
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self._test_equal(IFDRational(1, 1), 1, 1)
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self._test_equal(1, 2, Fraction(1, 2))
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self._test_equal(1, 2, IFDRational(1, 2))
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def test_nonetype(self):
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# Fails if the _delegate function doesn't return a valid function
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xres = IFDRational(72)
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yres = IFDRational(72)
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self.assertIsNotNone(xres._val)
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self.assertIsNotNone(xres.numerator)
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self.assertIsNotNone(xres.denominator)
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self.assertIsNotNone(yres._val)
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self.assertTrue(xres and 1)
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self.assertTrue(xres and yres)
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def test_ifd_rational_save(self):
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methods = (True, False)
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if 'libtiff_encoder' not in dir(Image.core):
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methods = (False,)
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for libtiff in methods:
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TiffImagePlugin.WRITE_LIBTIFF = libtiff
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im = hopper()
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out = self.tempfile('temp.tiff')
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res = IFDRational(301, 1)
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im.save(out, dpi=(res, res), compression='raw')
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reloaded = Image.open(out)
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self.assertEqual(float(IFDRational(301, 1)),
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float(reloaded.tag_v2[282]))
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