Pillow

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from __future__ import annotations
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from pathlib import Path, PurePath
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import pytest
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from PIL import _util
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@pytest.mark.parametrize(
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    "test_path", ["filename.ext", Path("filename.ext"), PurePath("filename.ext")]
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)
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def test_is_path(test_path: str | Path | PurePath) -> None:
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    # Act
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    it_is = _util.is_path(test_path)
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    # Assert
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    assert it_is
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def test_is_not_path(tmp_path: Path) -> None:
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    # Arrange
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    with (tmp_path / "temp.ext").open("w") as fp:
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        pass
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    # Act
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    it_is_not = _util.is_path(fp)
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    # Assert
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    assert not it_is_not
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def test_deferred_error() -> None:
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    # Arrange
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    # Act
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    thing = _util.DeferredError.new(ValueError("Some error text"))
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    # Assert
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    with pytest.raises(ValueError):
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        thing.some_attr
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