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104 lines
3.0 KiB
Python
104 lines
3.0 KiB
Python
from __future__ import annotations
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from pathlib import Path
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import pytest
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from PIL import Image, ImageSequence, TiffImagePlugin
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from .helper import assert_image_equal, hopper, skip_unless_feature
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def test_sanity(tmp_path: Path) -> None:
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test_file = str(tmp_path / "temp.im")
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im = hopper("RGB")
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im.save(test_file)
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seq = ImageSequence.Iterator(im)
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index = 0
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for frame in seq:
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assert_image_equal(im, frame)
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assert im.tell() == index
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index += 1
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assert index == 1
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with pytest.raises(AttributeError):
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ImageSequence.Iterator(0) # type: ignore[arg-type]
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def test_iterator() -> None:
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with Image.open("Tests/images/multipage.tiff") as im:
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i = ImageSequence.Iterator(im)
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for index in range(0, im.n_frames):
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assert i[index] == next(i)
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with pytest.raises(IndexError):
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i[index + 1]
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with pytest.raises(StopIteration):
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next(i)
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def test_iterator_min_frame() -> None:
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with Image.open("Tests/images/hopper.psd") as im:
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i = ImageSequence.Iterator(im)
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for index in range(1, im.n_frames):
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assert i[index] == next(i)
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@pytest.mark.parametrize(
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"libtiff", (pytest.param(True, marks=skip_unless_feature("libtiff")), False)
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)
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def test_multipage_tiff(monkeypatch: pytest.MonkeyPatch, libtiff: bool) -> None:
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monkeypatch.setattr(TiffImagePlugin, "READ_LIBTIFF", libtiff)
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with Image.open("Tests/images/multipage.tiff") as im:
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for index, frame in enumerate(ImageSequence.Iterator(im)):
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frame.load()
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assert index == im.tell()
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frame.convert("RGB")
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def test_consecutive() -> None:
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with Image.open("Tests/images/multipage.tiff") as im:
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first_frame = None
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for frame in ImageSequence.Iterator(im):
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if first_frame is None:
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first_frame = frame.copy()
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assert first_frame is not None
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for frame in ImageSequence.Iterator(im):
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assert_image_equal(frame, first_frame)
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break
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def test_palette_mmap() -> None:
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# Using mmap in ImageFile can require to reload the palette.
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with Image.open("Tests/images/multipage-mmap.tiff") as im:
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color1 = im.getpalette()[:3]
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im.seek(0)
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color2 = im.getpalette()[:3]
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assert color1 == color2
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def test_all_frames() -> None:
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# Test a single image
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with Image.open("Tests/images/iss634.gif") as im:
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ims = ImageSequence.all_frames(im)
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assert len(ims) == 42
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for i, im_frame in enumerate(ims):
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assert im_frame is not im
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im.seek(i)
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assert_image_equal(im, im_frame)
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# Test a series of images
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ims = ImageSequence.all_frames([im, hopper(), im])
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assert len(ims) == 85
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# Test an operation
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ims = ImageSequence.all_frames(im, lambda im_frame: im_frame.rotate(90))
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for i, im_frame in enumerate(ims):
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im.seek(i)
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assert_image_equal(im.rotate(90), im_frame)
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