python-pillow/Pillow
1
1
Fork 0
mirror of https://github.com/python-pillow/Pillow.git synced 2025-09-24 04:56:57 +03:00
Code Issues Packages Projects Releases Wiki Activity

Test transparency

Browse Source
This commit is contained in:
Andrew Murray 2025-09-07 12:49:10 +10:00
parent eef4848a0a
commit b90fe802ce
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Tests/test_file_gd.py
View File

@ -1,5 +1,7 @@
from __future__ import annotations
from io import BytesIO
import pytest
from PIL import GdImageFile, UnidentifiedImageError
@ -16,6 +18,14 @@ def test_sanity() -> None:
assert_image_similar_tofile(im.convert("RGB"), "Tests/images/hopper.jpg", 14)
def test_transparency() -> None:
with open(TEST_GD_FILE, "rb") as fp:
data = bytearray(fp.read())
data[7:11] = b"\x00\x00\x00\x05"
with GdImageFile.open(BytesIO(data)) as im:
assert im.info["transparency"] == 5
def test_bad_mode() -> None:
with pytest.raises(ValueError):
GdImageFile.open(TEST_GD_FILE, "bad mode")