from __future__ import annotations import os.path import subprocess import pytest from PIL import Image from .helper import assert_image_equal, hopper, magick_command def helper_save_as_palm(tmp_path, mode): # Arrange im = hopper(mode) outfile = str(tmp_path / ("temp_" + mode + ".palm")) # Act im.save(outfile) # Assert assert os.path.isfile(outfile) assert os.path.getsize(outfile) > 0 def open_with_magick(magick, tmp_path, f): outfile = str(tmp_path / "temp.png") rc = subprocess.call( magick + [f, outfile], stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT ) assert not rc return Image.open(outfile) def roundtrip(tmp_path, mode): magick = magick_command() if not magick: return im = hopper(mode) outfile = str(tmp_path / "temp.palm") im.save(outfile) converted = open_with_magick(magick, tmp_path, outfile) assert_image_equal(converted, im) def test_monochrome(tmp_path): # Arrange mode = "1" # Act / Assert helper_save_as_palm(tmp_path, mode) roundtrip(tmp_path, mode) @pytest.mark.xfail(reason="Palm P image is wrong") def test_p_mode(tmp_path): # Arrange mode = "P" # Act / Assert helper_save_as_palm(tmp_path, mode) roundtrip(tmp_path, mode) @pytest.mark.parametrize("mode", ("L", "RGB")) def test_oserror(tmp_path, mode): with pytest.raises(OSError): helper_save_as_palm(tmp_path, mode)