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Improve DdsImagePlugin test coverage (#9091)

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Hugo van Kemenade 2025-07-14 23:40:29 +03:00 committed by GitHub
commit 71d495add8
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2 changed files with 13 additions and 6 deletions
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Tests/images/unimplemented_pixel_format.dds Normal file
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19
Tests/test_file_dds.py
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@ -380,21 +380,28 @@ def test_palette() -> None:
assert_image_equal_tofile(im, "Tests/images/transparent.gif") assert_image_equal_tofile(im, "Tests/images/transparent.gif")
def test_unsupported_header_size() -> None:
with pytest.raises(OSError, match="Unsupported header size 0"):
with Image.open(BytesIO(b"DDS " + b"\x00" * 4)):
pass
def test_unsupported_bitcount() -> None: def test_unsupported_bitcount() -> None:
with pytest.raises(OSError): with pytest.raises(OSError, match="Unsupported bitcount 24 for 131072"):
with Image.open("Tests/images/unsupported_bitcount.dds"): with Image.open("Tests/images/unsupported_bitcount.dds"):
pass pass
@pytest.mark.parametrize( @pytest.mark.parametrize(
"test_file", "test_file, message",
( (
"Tests/images/unimplemented_dxgi_format.dds", ("Tests/images/unimplemented_dxgi_format.dds", "Unimplemented DXGI format 93"),
"Tests/images/unimplemented_pfflags.dds", ("Tests/images/unimplemented_pixel_format.dds", "Unimplemented pixel format 0"),
("Tests/images/unimplemented_pfflags.dds", "Unknown pixel format flags 8"),
), ),
) )
def test_not_implemented(test_file: str) -> None: def test_not_implemented(test_file: str, message: str) -> None:
with pytest.raises(NotImplementedError): with pytest.raises(NotImplementedError, match=message):
with Image.open(test_file): with Image.open(test_file):
pass pass