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Improved FtexImagePlugin test coverage #8766

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Merged
hugovk merged 1 commit into from
Mar 3, 2025
Merged

Improved FtexImagePlugin test coverage #8766

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15 changes: 15 additions & 0 deletions Tests/test_file_ftex.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,8 @@
from __future__ import annotations

import io
import struct

import pytest

from PIL import FtexImagePlugin, Image
Expand All @@ -23,3 +26,15 @@

with pytest.raises(SyntaxError):
FtexImagePlugin.FtexImageFile(invalid_file)


def test_invalid_texture() -> None:
with open("Tests/images/ftex_dxt1.ftc", "rb") as fp:
data = fp.read()

# Change texture compression format
data = data[:24] + struct.pack("<i", 2) + data[28:]

with pytest.raises(ValueError, match="Invalid texture compression format: 2"):
with Image.open(io.BytesIO(data)):
pass

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