Pillow/Tests/test_lib_image.py

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from __future__ import annotations
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import pytest
from PIL import Image
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def test_setmode() -> None:
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im = Image.new("L", (1, 1), 255)
im.im.setmode("1")
assert im.im.getpixel((0, 0)) == 255
im.im.setmode("L")
assert im.im.getpixel((0, 0)) == 255
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im = Image.new("1", (1, 1), 1)
im.im.setmode("L")
assert im.im.getpixel((0, 0)) == 255
im.im.setmode("1")
assert im.im.getpixel((0, 0)) == 255
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im = Image.new("RGB", (1, 1), (1, 2, 3))
im.im.setmode("RGB")
assert im.im.getpixel((0, 0)) == (1, 2, 3)
im.im.setmode("RGBA")
assert im.im.getpixel((0, 0)) == (1, 2, 3, 255)
im.im.setmode("RGBX")
assert im.im.getpixel((0, 0)) == (1, 2, 3, 255)
im.im.setmode("RGB")
assert im.im.getpixel((0, 0)) == (1, 2, 3)
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with pytest.raises(ValueError):
im.im.setmode("L")
with pytest.raises(ValueError):
im.im.setmode("RGBABCDE")