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63 lines
1.7 KiB
Python
63 lines
1.7 KiB
Python
from __future__ import annotations
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from pathlib import Path
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import pytest
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from PIL import Image, features
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from .helper import assert_image_equal, hopper
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def test_split() -> None:
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def split(mode: str) -> list[tuple[str, int, int]]:
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layers = hopper(mode).split()
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return [(i.mode, i.size[0], i.size[1]) for i in layers]
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assert split("1") == [("1", 128, 128)]
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assert split("L") == [("L", 128, 128)]
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assert split("I") == [("I", 128, 128)]
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assert split("F") == [("F", 128, 128)]
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assert split("P") == [("P", 128, 128)]
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assert split("RGB") == [("L", 128, 128), ("L", 128, 128), ("L", 128, 128)]
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assert split("RGBA") == [
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("L", 128, 128),
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("L", 128, 128),
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("L", 128, 128),
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("L", 128, 128),
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]
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assert split("CMYK") == [
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("L", 128, 128),
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("L", 128, 128),
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("L", 128, 128),
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("L", 128, 128),
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]
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assert split("YCbCr") == [("L", 128, 128), ("L", 128, 128), ("L", 128, 128)]
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@pytest.mark.parametrize(
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"mode", ("1", "L", "I", "F", "P", "RGB", "RGBA", "CMYK", "YCbCr")
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)
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def test_split_merge(mode: str) -> None:
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expected = Image.merge(mode, hopper(mode).split())
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assert_image_equal(hopper(mode), expected)
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def test_split_open(tmp_path: Path) -> None:
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if features.check("zlib"):
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test_file = tmp_path / "temp.png"
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else:
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test_file = tmp_path / "temp.pcx"
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def split_open(mode: str) -> int:
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hopper(mode).save(test_file)
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with Image.open(test_file) as im:
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return len(im.split())
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assert split_open("1") == 1
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assert split_open("L") == 1
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assert split_open("P") == 1
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assert split_open("RGB") == 3
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if features.check("zlib"):
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assert split_open("RGBA") == 4
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