mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-12-26 18:06:18 +03:00
62 lines
1.7 KiB
Python
62 lines
1.7 KiB
Python
from __future__ import print_function
|
|
|
|
from helper import PillowTestCase, hopper
|
|
|
|
from PIL import TiffImagePlugin, Image
|
|
from PIL.TiffImagePlugin import IFDRational
|
|
|
|
from fractions import Fraction
|
|
|
|
class Test_IFDRational(PillowTestCase):
|
|
|
|
|
|
def _test_equal(self, num, denom, target):
|
|
|
|
t = IFDRational(num, denom)
|
|
|
|
self.assertEqual(target, t)
|
|
self.assertEqual(t, target)
|
|
|
|
def test_sanity(self):
|
|
|
|
self._test_equal(1, 1, 1)
|
|
self._test_equal(1, 1, Fraction(1,1))
|
|
|
|
self._test_equal(2, 2, 1)
|
|
self._test_equal(1.0, 1, Fraction(1,1))
|
|
|
|
self._test_equal(Fraction(1,1), 1, Fraction(1,1))
|
|
self._test_equal(IFDRational(1,1), 1, 1)
|
|
|
|
|
|
self._test_equal(1, 2, Fraction(1,2))
|
|
self._test_equal(1, 2, IFDRational(1,2))
|
|
|
|
def test_nonetype(self):
|
|
" Fails if the _delegate function doesn't return a valid function"
|
|
|
|
xres = IFDRational(72)
|
|
yres = IFDRational(72)
|
|
self.assert_(xres._val is not None)
|
|
self.assert_(xres.numerator is not None)
|
|
self.assert_(xres.denominator is not None)
|
|
self.assert_(yres._val is not None)
|
|
|
|
self.assert_(xres and 1)
|
|
self.assert_(xres and yres)
|
|
|
|
|
|
def test_ifd_rational_save(self):
|
|
for libtiff in (True, False):
|
|
TiffImagePlugin.WRITE_LIBTIFF = libtiff
|
|
|
|
im = hopper()
|
|
out = self.tempfile('temp.tiff')
|
|
res = IFDRational(301,1)
|
|
im.save(out, dpi=(res,res), compression='raw')
|
|
|
|
reloaded = Image.open(out)
|
|
self.assertEqual(float(IFDRational(301,1)),
|
|
float(reloaded.tag_v2[282]))
|
|
|