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105 lines
3.0 KiB
Python
105 lines
3.0 KiB
Python
from __future__ import annotations
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import io
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import os
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import pytest
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from PIL import Image, SunImagePlugin, _binary
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from .helper import assert_image_equal_tofile, assert_image_similar, hopper
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EXTRA_DIR = "Tests/images/sunraster"
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def test_sanity() -> None:
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# Arrange
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# Created with ImageMagick: convert hopper.jpg hopper.ras
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test_file = "Tests/images/hopper.ras"
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# Act
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with Image.open(test_file) as im:
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# Assert
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assert im.size == (128, 128)
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assert_image_similar(im, hopper(), 5) # visually verified
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invalid_file = "Tests/images/flower.jpg"
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with pytest.raises(SyntaxError):
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SunImagePlugin.SunImageFile(invalid_file)
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def test_im1() -> None:
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with Image.open("Tests/images/sunraster.im1") as im:
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assert_image_equal_tofile(im, "Tests/images/sunraster.im1.png")
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def _sun_header(
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depth: int = 0, file_type: int = 0, palette_length: int = 0
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) -> io.BytesIO:
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return io.BytesIO(
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_binary.o32be(0x59A66A95)
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+ b"\x00" * 8
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+ _binary.o32be(depth)
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+ b"\x00" * 4
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+ _binary.o32be(file_type)
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+ b"\x00" * 4
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+ _binary.o32be(palette_length)
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)
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def test_unsupported_mode_bit_depth() -> None:
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with pytest.raises(SyntaxError, match="Unsupported Mode/Bit Depth"):
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with SunImagePlugin.SunImageFile(_sun_header()):
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pass
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def test_unsupported_color_palette_length() -> None:
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with pytest.raises(SyntaxError, match="Unsupported Color Palette Length"):
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with SunImagePlugin.SunImageFile(_sun_header(depth=1, palette_length=1025)):
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pass
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def test_unsupported_palette_type() -> None:
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with pytest.raises(SyntaxError, match="Unsupported Palette Type"):
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with SunImagePlugin.SunImageFile(_sun_header(depth=1, palette_length=1)):
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pass
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def test_unsupported_file_type() -> None:
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with pytest.raises(SyntaxError, match="Unsupported Sun Raster file type"):
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with SunImagePlugin.SunImageFile(_sun_header(depth=1, file_type=6)):
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pass
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@pytest.mark.skipif(
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not os.path.exists(EXTRA_DIR), reason="Extra image files not installed"
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)
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def test_rgbx() -> None:
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with open(os.path.join(EXTRA_DIR, "32bpp.ras"), "rb") as fp:
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data = fp.read()
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# Set file type to 3
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data = data[:20] + _binary.o32be(3) + data[24:]
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with Image.open(io.BytesIO(data)) as im:
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r, g, b = im.split()
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im = Image.merge("RGB", (b, g, r))
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assert_image_equal_tofile(im, os.path.join(EXTRA_DIR, "32bpp.png"))
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@pytest.mark.skipif(
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not os.path.exists(EXTRA_DIR), reason="Extra image files not installed"
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)
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def test_others() -> None:
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files = (
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os.path.join(EXTRA_DIR, f)
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for f in os.listdir(EXTRA_DIR)
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if os.path.splitext(f)[1] in (".sun", ".SUN", ".ras")
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)
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for path in files:
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with Image.open(path) as im:
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im.load()
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assert isinstance(im, SunImagePlugin.SunImageFile)
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assert_image_equal_tofile(im, f"{os.path.splitext(path)[0]}.png")
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