mirror of
https://github.com/python-pillow/Pillow.git
synced 2025-11-04 01:47:47 +03:00
73 lines
2.2 KiB
Python
73 lines
2.2 KiB
Python
from __future__ import annotations
|
|
|
|
from io import BytesIO
|
|
|
|
import pytest
|
|
|
|
from PIL.GimpPaletteFile import GimpPaletteFile
|
|
|
|
|
|
def test_sanity() -> None:
|
|
with open("Tests/images/test.gpl", "rb") as fp:
|
|
GimpPaletteFile(fp)
|
|
|
|
with open("Tests/images/hopper.jpg", "rb") as fp:
|
|
with pytest.raises(SyntaxError):
|
|
GimpPaletteFile(fp)
|
|
|
|
with open("Tests/images/bad_palette_file.gpl", "rb") as fp:
|
|
with pytest.raises(SyntaxError, match="bad palette file"):
|
|
GimpPaletteFile(fp)
|
|
|
|
with open("Tests/images/bad_palette_entry.gpl", "rb") as fp:
|
|
with pytest.raises(ValueError, match="bad palette entry"):
|
|
GimpPaletteFile(fp)
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"filename, size", (("custom_gimp_palette.gpl", 8), ("full_gimp_palette.gpl", 256))
|
|
)
|
|
def test_get_palette(filename: str, size: int) -> None:
|
|
# Arrange
|
|
with open("Tests/images/" + filename, "rb") as fp:
|
|
palette_file = GimpPaletteFile(fp)
|
|
|
|
# Act
|
|
palette, mode = palette_file.getpalette()
|
|
|
|
# Assert
|
|
assert mode == "RGB"
|
|
assert len(palette) / 3 == size
|
|
|
|
|
|
def test_frombytes() -> None:
|
|
# Test that __init__ stops reading after 260 lines
|
|
with open("Tests/images/custom_gimp_palette.gpl", "rb") as fp:
|
|
custom_data = fp.read()
|
|
custom_data += b"#\n" * 300 + b" 0 0 0 Index 12"
|
|
b = BytesIO(custom_data)
|
|
palette = GimpPaletteFile(b)
|
|
assert len(palette.palette) / 3 == 8
|
|
|
|
# Test that __init__ only reads 256 entries
|
|
with open("Tests/images/full_gimp_palette.gpl", "rb") as fp:
|
|
full_data = fp.read()
|
|
data = full_data.replace(b"#\n", b"") + b" 0 0 0 Index 256"
|
|
b = BytesIO(data)
|
|
palette = GimpPaletteFile(b)
|
|
assert len(palette.palette) / 3 == 256
|
|
|
|
# Test that frombytes() can read beyond that
|
|
palette = GimpPaletteFile.frombytes(data)
|
|
assert len(palette.palette) / 3 == 257
|
|
|
|
# Test that __init__ raises an error if a comment is too long
|
|
data = full_data[:-1] + b"a" * 100
|
|
b = BytesIO(data)
|
|
with pytest.raises(SyntaxError, match="bad palette file"):
|
|
palette = GimpPaletteFile(b)
|
|
|
|
# Test that frombytes() can read the data regardless
|
|
palette = GimpPaletteFile.frombytes(data)
|
|
assert len(palette.palette) / 3 == 256
|