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72 lines
2.0 KiB
Python
72 lines
2.0 KiB
Python
from __future__ import annotations
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import pytest
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from PIL import Image
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from .helper import assert_image_equal, skip_unless_feature
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pytestmark = [skip_unless_feature("jpegxl")]
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def test_n_frames() -> None:
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"""Ensure that jxl format sets n_frames and is_animated attributes correctly."""
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with Image.open("Tests/images/hopper.jxl") as im:
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assert im.n_frames == 1
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assert not im.is_animated
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with Image.open("Tests/images/iss634.jxl") as im:
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assert im.n_frames == 41
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assert im.is_animated
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def test_float_duration() -> None:
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with Image.open("Tests/images/iss634.jxl") as im:
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im.load()
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assert im.info["duration"] == 70
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def test_seeking() -> None:
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"""
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Open an animated jxl file, and then try seeking through frames in reverse-order,
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verifying the durations are correct.
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"""
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with Image.open("Tests/images/jxl/traffic_light.jxl") as im1:
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with Image.open("Tests/images/jxl/traffic_light.gif") as im2:
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assert im1.n_frames == im2.n_frames
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assert im1.is_animated
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# Traverse frames in reverse, checking timestamps and durations
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total_dur = 0
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for frame in reversed(range(im1.n_frames)):
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im1.seek(frame)
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im1.load()
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im2.seek(frame)
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im2.load()
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assert_image_equal(im1.convert("RGB"), im2.convert("RGB"))
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total_dur += im1.info["duration"]
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assert im1.info["duration"] == im2.info["duration"]
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assert im1.info["timestamp"] == im1.info["timestamp"]
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assert total_dur == 8000
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assert im1.tell() == 0
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assert im2.tell() == 0
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im1.seek(0)
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im1.load()
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im2.seek(0)
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im2.load()
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def test_seek_errors() -> None:
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with Image.open("Tests/images/iss634.jxl") as im:
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with pytest.raises(EOFError):
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im.seek(-1)
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with pytest.raises(EOFError):
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im.seek(47)
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