Pillow/Tests/test_file_webp_lossless.py

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import pytest
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from PIL import Image
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from .helper import assert_image_equal, hopper
_webp = pytest.importorskip("PIL._webp", reason="WebP support not installed")
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RGB_MODE = "RGB"
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def test_write_lossless_rgb(tmp_path):
if _webp.WebPDecoderVersion() < 0x0200:
pytest.skip("lossless not included")
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temp_file = str(tmp_path / "temp.webp")
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hopper(RGB_MODE).save(temp_file, lossless=True)
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with Image.open(temp_file) as image:
image.load()
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assert image.mode == RGB_MODE
assert image.size == (128, 128)
assert image.format == "WEBP"
image.load()
image.getdata()
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assert_image_equal(image, hopper(RGB_MODE))