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Rearranged subsampling assertions

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Andrew Murray 2023-11-27 14:35:23 +11:00 committed by Benjamin Gilbert
parent 4b422db243
commit f90827dfc8
1 changed files with 20 additions and 23 deletions
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43
Tests/test_file_jpeg.py
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@ -145,11 +145,13 @@ class TestFileJpeg:
def getchannels(im):
return tuple(v[0] for v in im.layer)
im = self.roundtrip(hopper())
assert getchannels(im) == (1, 2, 3)
im = self.roundtrip(hopper(), keep_rgb=True)
assert getchannels(im) == (ord("R"), ord("G"), ord("B"))
assert_image_similar(hopper(), im, 12)
im = hopper()
im_ycbcr = self.roundtrip(im)
assert getchannels(im_ycbcr) == (1, 2, 3)
im_rgb = self.roundtrip(im, keep_rgb=True)
assert getchannels(im_rgb) == (ord("R"), ord("G"), ord("B"))
assert_image_similar(im, im_rgb, 12)
@pytest.mark.parametrize(
"test_image_path",
@ -434,31 +436,26 @@ class TestFileJpeg:
# experimental API
im = self.roundtrip(hopper(), subsampling=-1) # default
assert getsampling(im) == (2, 2, 1, 1, 1, 1)
im = self.roundtrip(hopper(), subsampling=0) # 4:4:4
assert getsampling(im) == (1, 1, 1, 1, 1, 1)
im = self.roundtrip(hopper(), subsampling=1) # 4:2:2
assert getsampling(im) == (2, 1, 1, 1, 1, 1)
im = self.roundtrip(hopper(), subsampling=2) # 4:2:0
assert getsampling(im) == (2, 2, 1, 1, 1, 1)
for subsampling in (0, "4:4:4"):
im = self.roundtrip(hopper(), subsampling=subsampling)
assert getsampling(im) == (1, 1, 1, 1, 1, 1)
for subsampling in (1, "4:2:2"):
im = self.roundtrip(hopper(), subsampling=subsampling)
assert getsampling(im) == (2, 1, 1, 1, 1, 1)
for subsampling in (2, "4:2:0", "4:1:1"):
im = self.roundtrip(hopper(), subsampling=subsampling)
assert getsampling(im) == (2, 2, 1, 1, 1, 1)
im = self.roundtrip(hopper(), subsampling=3) # default (undefined)
assert getsampling(im) == (2, 2, 1, 1, 1, 1)
im = self.roundtrip(hopper(), subsampling="4:4:4")
assert getsampling(im) == (1, 1, 1, 1, 1, 1)
im = self.roundtrip(hopper(), subsampling="4:2:2")
assert getsampling(im) == (2, 1, 1, 1, 1, 1)
im = self.roundtrip(hopper(), subsampling="4:2:0")
assert getsampling(im) == (2, 2, 1, 1, 1, 1)
im = self.roundtrip(hopper(), subsampling="4:1:1")
assert getsampling(im) == (2, 2, 1, 1, 1, 1)
with pytest.raises(TypeError):
self.roundtrip(hopper(), subsampling="1:1:1")
# RGB colorspace, no subsampling by default
im = self.roundtrip(hopper(), subsampling=3, keep_rgb=True)
assert getsampling(im) == (1, 1, 1, 1, 1, 1)
with pytest.raises(TypeError):
self.roundtrip(hopper(), subsampling="1:1:1")
def test_exif(self):
with Image.open("Tests/images/pil_sample_rgb.jpg") as im:
info = im._getexif()