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112 lines
2.8 KiB
Python
112 lines
2.8 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, SgiImagePlugin
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from .helper import (
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assert_image_equal,
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assert_image_equal_tofile,
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assert_image_similar,
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hopper,
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)
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def test_rgb() -> None:
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# Created with ImageMagick then renamed:
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# convert hopper.ppm -compress None sgi:hopper.rgb
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test_file = "Tests/images/hopper.rgb"
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with Image.open(test_file) as im:
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assert_image_equal(im, hopper())
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assert im.get_format_mimetype() == "image/rgb"
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def test_rgb16() -> None:
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assert_image_equal_tofile(hopper(), "Tests/images/hopper16.rgb")
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def test_l() -> None:
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# Created with ImageMagick
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# convert hopper.ppm -monochrome -compress None sgi:hopper.bw
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test_file = "Tests/images/hopper.bw"
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with Image.open(test_file) as im:
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assert_image_similar(im, hopper("L"), 2)
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assert im.get_format_mimetype() == "image/sgi"
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def test_rgba() -> None:
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# Created with ImageMagick:
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# convert transparent.png -compress None transparent.sgi
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test_file = "Tests/images/transparent.sgi"
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with Image.open(test_file) as im:
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assert_image_equal_tofile(im, "Tests/images/transparent.png")
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assert im.get_format_mimetype() == "image/sgi"
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def test_rle() -> None:
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# Created with ImageMagick:
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# convert hopper.ppm hopper.sgi
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test_file = "Tests/images/hopper.sgi"
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with Image.open(test_file) as im:
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assert_image_equal_tofile(im, "Tests/images/hopper.rgb")
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def test_rle16() -> None:
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test_file = "Tests/images/tv16.sgi"
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with Image.open(test_file) as im:
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assert_image_equal_tofile(im, "Tests/images/tv.rgb")
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def test_invalid_file() -> None:
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invalid_file = "Tests/images/flower.jpg"
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with pytest.raises(ValueError):
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SgiImagePlugin.SgiImageFile(invalid_file)
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def roundtrip(img: Image.Image, tmp_path: Path) -> None:
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out = tmp_path / "temp.sgi"
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img.save(out, format="sgi")
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assert_image_equal_tofile(img, out)
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out = tmp_path / "fp.sgi"
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with open(out, "wb") as fp:
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img.save(fp)
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assert_image_equal_tofile(img, out)
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assert not fp.closed
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@pytest.mark.parametrize("mode", ("L", "RGB", "RGBA"))
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def test_write(mode: str, tmp_path: Path) -> None:
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roundtrip(hopper(mode), tmp_path)
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def test_write_L_mode_1_dimension(tmp_path: Path) -> None:
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roundtrip(Image.new("L", (10, 1)), tmp_path)
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def test_write16(tmp_path: Path) -> None:
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test_file = "Tests/images/hopper16.rgb"
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with Image.open(test_file) as im:
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out = tmp_path / "temp.sgi"
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im.save(out, format="sgi", bpc=2)
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assert_image_equal_tofile(im, out)
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def test_unsupported_mode(tmp_path: Path) -> None:
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im = hopper("LA")
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out = tmp_path / "temp.sgi"
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with pytest.raises(ValueError):
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im.save(out, format="sgi")
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