import io import os import shutil import sys import tempfile import warnings import pytest from PIL import ( ExifTags, Image, ImageDraw, ImagePalette, UnidentifiedImageError, features, ) from .helper import ( assert_image_equal, assert_image_equal_tofile, assert_image_similar_tofile, assert_not_all_same, hopper, is_win32, mark_if_feature_version, skip_unless_feature, ) class TestImage: @pytest.mark.parametrize( "mode", ( "1", "P", "PA", "L", "LA", "La", "F", "I", "I;16", "I;16L", "I;16B", "I;16N", "RGB", "RGBX", "RGBA", "RGBa", "BGR;15", "BGR;16", "BGR;24", "CMYK", "YCbCr", "LAB", "HSV", ), ) def test_image_modes_success(self, mode): Image.new(mode, (1, 1)) @pytest.mark.parametrize("mode", ("", "bad", "very very long")) def test_image_modes_fail(self, mode): with pytest.raises(ValueError) as e: Image.new(mode, (1, 1)) assert str(e.value) == "unrecognized image mode" def test_exception_inheritance(self): assert issubclass(UnidentifiedImageError, OSError) def test_sanity(self): im = Image.new("L", (100, 100)) assert repr(im)[:45] == "" def test_open_formats(self): PNGFILE = "Tests/images/hopper.png" JPGFILE = "Tests/images/hopper.jpg" with pytest.raises(TypeError): with Image.open(PNGFILE, formats=123): pass for formats in [["JPEG"], ("JPEG",), ["jpeg"], ["Jpeg"], ["jPeG"], ["JpEg"]]: with pytest.raises(UnidentifiedImageError): with Image.open(PNGFILE, formats=formats): pass with Image.open(JPGFILE, formats=formats) as im: assert im.mode == "RGB" assert im.size == (128, 128) for file in [PNGFILE, JPGFILE]: with Image.open(file, formats=None) as im: assert im.mode == "RGB" assert im.size == (128, 128) def test_width_height(self): im = Image.new("RGB", (1, 2)) assert im.width == 1 assert im.height == 2 with pytest.raises(AttributeError): im.size = (3, 4) def test_invalid_image(self): im = io.BytesIO(b"") with pytest.raises(UnidentifiedImageError): with Image.open(im): pass def test_bad_mode(self): with pytest.raises(ValueError): with Image.open("filename", "bad mode"): pass def test_stringio(self): with pytest.raises(ValueError): with Image.open(io.StringIO()): pass def test_pathlib(self, tmp_path): from PIL.Image import Path with Image.open(Path("Tests/images/multipage-mmap.tiff")) as im: assert im.mode == "P" assert im.size == (10, 10) with Image.open(Path("Tests/images/hopper.jpg")) as im: assert im.mode == "RGB" assert im.size == (128, 128) for ext in (".jpg", ".jp2"): if ext == ".jp2" and not features.check_codec("jpg_2000"): pytest.skip("jpg_2000 not available") temp_file = str(tmp_path / ("temp." + ext)) if os.path.exists(temp_file): os.remove(temp_file) im.save(Path(temp_file)) def test_fp_name(self, tmp_path): temp_file = str(tmp_path / "temp.jpg") class FP: def write(self, b): pass fp = FP() fp.name = temp_file im = hopper() im.save(fp) def test_tempfile(self): # see #1460, pathlib support breaks tempfile.TemporaryFile on py27 # Will error out on save on 3.0.0 im = hopper() with tempfile.TemporaryFile() as fp: im.save(fp, "JPEG") fp.seek(0) assert_image_similar_tofile(im, fp, 20) def test_unknown_extension(self, tmp_path): im = hopper() temp_file = str(tmp_path / "temp.unknown") with pytest.raises(ValueError): im.save(temp_file) def test_internals(self): im = Image.new("L", (100, 100)) im.readonly = 1 im._copy() assert not im.readonly im.readonly = 1 im.paste(0, (0, 0, 100, 100)) assert not im.readonly @pytest.mark.skipif(is_win32(), reason="Test requires opening tempfile twice") @pytest.mark.skipif( sys.platform == "cygwin", reason="Test requires opening an mmaped file for writing", ) def test_readonly_save(self, tmp_path): temp_file = str(tmp_path / "temp.bmp") shutil.copy("Tests/images/rgb32bf-rgba.bmp", temp_file) with Image.open(temp_file) as im: assert im.readonly im.save(temp_file) def test_dump(self, tmp_path): im = Image.new("L", (10, 10)) im._dump(str(tmp_path / "temp_L.ppm")) im = Image.new("RGB", (10, 10)) im._dump(str(tmp_path / "temp_RGB.ppm")) im = Image.new("HSV", (10, 10)) with pytest.raises(ValueError): im._dump(str(tmp_path / "temp_HSV.ppm")) def test_comparison_with_other_type(self): # Arrange item = Image.new("RGB", (25, 25), "#000") num = 12 # Act/Assert # Shouldn't cause AttributeError (#774) assert item is not None assert item != num def test_expand_x(self): # Arrange im = hopper() orig_size = im.size xmargin = 5 # Act im = im._expand(xmargin) # Assert assert im.size[0] == orig_size[0] + 2 * xmargin assert im.size[1] == orig_size[1] + 2 * xmargin def test_expand_xy(self): # Arrange im = hopper() orig_size = im.size xmargin = 5 ymargin = 3 # Act im = im._expand(xmargin, ymargin) # Assert assert im.size[0] == orig_size[0] + 2 * xmargin assert im.size[1] == orig_size[1] + 2 * ymargin def test_getbands(self): # Assert assert hopper("RGB").getbands() == ("R", "G", "B") assert hopper("YCbCr").getbands() == ("Y", "Cb", "Cr") def test_getchannel_wrong_params(self): im = hopper() with pytest.raises(ValueError): im.getchannel(-1) with pytest.raises(ValueError): im.getchannel(3) with pytest.raises(ValueError): im.getchannel("Z") with pytest.raises(ValueError): im.getchannel("1") def test_getchannel(self): im = hopper("YCbCr") Y, Cb, Cr = im.split() assert_image_equal(Y, im.getchannel(0)) assert_image_equal(Y, im.getchannel("Y")) assert_image_equal(Cb, im.getchannel(1)) assert_image_equal(Cb, im.getchannel("Cb")) assert_image_equal(Cr, im.getchannel(2)) assert_image_equal(Cr, im.getchannel("Cr")) def test_getbbox(self): # Arrange im = hopper() # Act bbox = im.getbbox() # Assert assert bbox == (0, 0, 128, 128) def test_ne(self): # Arrange im1 = Image.new("RGB", (25, 25), "black") im2 = Image.new("RGB", (25, 25), "white") # Act / Assert assert im1 != im2 def test_alpha_composite(self): # https://stackoverflow.com/questions/3374878 # Arrange expected_colors = sorted( [ (1122, (128, 127, 0, 255)), (1089, (0, 255, 0, 255)), (3300, (255, 0, 0, 255)), (1156, (170, 85, 0, 192)), (1122, (0, 255, 0, 128)), (1122, (255, 0, 0, 128)), (1089, (0, 255, 0, 0)), ] ) dst = Image.new("RGBA", size=(100, 100), color=(0, 255, 0, 255)) draw = ImageDraw.Draw(dst) draw.rectangle((0, 33, 100, 66), fill=(0, 255, 0, 128)) draw.rectangle((0, 67, 100, 100), fill=(0, 255, 0, 0)) src = Image.new("RGBA", size=(100, 100), color=(255, 0, 0, 255)) draw = ImageDraw.Draw(src) draw.rectangle((33, 0, 66, 100), fill=(255, 0, 0, 128)) draw.rectangle((67, 0, 100, 100), fill=(255, 0, 0, 0)) # Act img = Image.alpha_composite(dst, src) # Assert img_colors = sorted(img.getcolors()) assert img_colors == expected_colors def test_alpha_inplace(self): src = Image.new("RGBA", (128, 128), "blue") over = Image.new("RGBA", (128, 128), "red") mask = hopper("L") over.putalpha(mask) target = Image.alpha_composite(src, over) # basic full = src.copy() full.alpha_composite(over) assert_image_equal(full, target) # with offset down to right offset = src.copy() offset.alpha_composite(over, (64, 64)) assert_image_equal(offset.crop((64, 64, 127, 127)), target.crop((0, 0, 63, 63))) assert offset.size == (128, 128) # with negative offset offset = src.copy() offset.alpha_composite(over, (-64, -64)) assert_image_equal(offset.crop((0, 0, 63, 63)), target.crop((64, 64, 127, 127))) assert offset.size == (128, 128) # offset and crop box = src.copy() box.alpha_composite(over, (64, 64), (0, 0, 32, 32)) assert_image_equal(box.crop((64, 64, 96, 96)), target.crop((0, 0, 32, 32))) assert_image_equal(box.crop((96, 96, 128, 128)), src.crop((0, 0, 32, 32))) assert box.size == (128, 128) # source point source = src.copy() source.alpha_composite(over, (32, 32), (32, 32, 96, 96)) assert_image_equal(source.crop((32, 32, 96, 96)), target.crop((32, 32, 96, 96))) assert source.size == (128, 128) # errors with pytest.raises(ValueError): source.alpha_composite(over, "invalid source") with pytest.raises(ValueError): source.alpha_composite(over, (0, 0), "invalid destination") with pytest.raises(ValueError): source.alpha_composite(over, 0) with pytest.raises(ValueError): source.alpha_composite(over, (0, 0), 0) with pytest.raises(ValueError): source.alpha_composite(over, (0, 0), (0, -1)) def test_register_open_duplicates(self): # Arrange factory, accept = Image.OPEN["JPEG"] id_length = len(Image.ID) # Act Image.register_open("JPEG", factory, accept) # Assert assert len(Image.ID) == id_length def test_registered_extensions_uninitialized(self): # Arrange Image._initialized = 0 # Act Image.registered_extensions() # Assert assert Image._initialized == 2 def test_registered_extensions(self): # Arrange # Open an image to trigger plugin registration with Image.open("Tests/images/rgb.jpg"): pass # Act extensions = Image.registered_extensions() # Assert assert extensions for ext in [".cur", ".icns", ".tif", ".tiff"]: assert ext in extensions def test_effect_mandelbrot(self): # Arrange size = (512, 512) extent = (-3, -2.5, 2, 2.5) quality = 100 # Act im = Image.effect_mandelbrot(size, extent, quality) # Assert assert im.size == (512, 512) assert_image_equal_tofile(im, "Tests/images/effect_mandelbrot.png") def test_effect_mandelbrot_bad_arguments(self): # Arrange size = (512, 512) # Get coordinates the wrong way round: extent = (+3, +2.5, -2, -2.5) # Quality < 2: quality = 1 # Act/Assert with pytest.raises(ValueError): Image.effect_mandelbrot(size, extent, quality) def test_effect_noise(self): # Arrange size = (100, 100) sigma = 128 # Act im = Image.effect_noise(size, sigma) # Assert assert im.size == (100, 100) assert im.mode == "L" p0 = im.getpixel((0, 0)) p1 = im.getpixel((0, 1)) p2 = im.getpixel((0, 2)) p3 = im.getpixel((0, 3)) p4 = im.getpixel((0, 4)) assert_not_all_same([p0, p1, p2, p3, p4]) def test_effect_spread(self): # Arrange im = hopper() distance = 10 # Act im2 = im.effect_spread(distance) # Assert assert im.size == (128, 128) assert_image_similar_tofile(im2, "Tests/images/effect_spread.png", 110) def test_effect_spread_zero(self): # Arrange im = hopper() distance = 0 # Act im2 = im.effect_spread(distance) # Assert assert_image_equal(im, im2) def test_check_size(self): # Checking that the _check_size function throws value errors when we want it to with pytest.raises(ValueError): Image.new("RGB", 0) # not a tuple with pytest.raises(ValueError): Image.new("RGB", (0,)) # Tuple too short with pytest.raises(ValueError): Image.new("RGB", (-1, -1)) # w,h < 0 # this should pass with 0 sized images, #2259 im = Image.new("L", (0, 0)) assert im.size == (0, 0) im = Image.new("L", (0, 100)) assert im.size == (0, 100) im = Image.new("L", (100, 0)) assert im.size == (100, 0) assert Image.new("RGB", (1, 1)) # Should pass lists too i = Image.new("RGB", [1, 1]) assert isinstance(i.size, tuple) @pytest.mark.timeout(0.75) @pytest.mark.skipif( "PILLOW_VALGRIND_TEST" in os.environ, reason="Valgrind is slower" ) @pytest.mark.parametrize("size", ((0, 100000000), (100000000, 0))) def test_empty_image(self, size): Image.new("RGB", size) def test_storage_neg(self): # Storage.c accepted negative values for xsize, ysize. Was # test_neg_ppm, but the core function for that has been # removed Calling directly into core to test the error in # Storage.c, rather than the size check above with pytest.raises(ValueError): Image.core.fill("RGB", (2, -2), (0, 0, 0)) def test_one_item_tuple(self): for mode in ("I", "F", "L"): im = Image.new(mode, (100, 100), (5,)) px = im.load() assert px[0, 0] == 5 def test_linear_gradient_wrong_mode(self): # Arrange wrong_mode = "RGB" # Act / Assert with pytest.raises(ValueError): Image.linear_gradient(wrong_mode) @pytest.mark.parametrize("mode", ("L", "P", "I", "F")) def test_linear_gradient(self, mode): # Arrange target_file = "Tests/images/linear_gradient.png" # Act im = Image.linear_gradient(mode) # Assert assert im.size == (256, 256) assert im.mode == mode assert im.getpixel((0, 0)) == 0 assert im.getpixel((255, 255)) == 255 with Image.open(target_file) as target: target = target.convert(mode) assert_image_equal(im, target) def test_radial_gradient_wrong_mode(self): # Arrange wrong_mode = "RGB" # Act / Assert with pytest.raises(ValueError): Image.radial_gradient(wrong_mode) @pytest.mark.parametrize("mode", ("L", "P", "I", "F")) def test_radial_gradient(self, mode): # Arrange target_file = "Tests/images/radial_gradient.png" # Act im = Image.radial_gradient(mode) # Assert assert im.size == (256, 256) assert im.mode == mode assert im.getpixel((0, 0)) == 255 assert im.getpixel((128, 128)) == 0 with Image.open(target_file) as target: target = target.convert(mode) assert_image_equal(im, target) def test_register_extensions(self): test_format = "a" exts = ["b", "c"] for ext in exts: Image.register_extension(test_format, ext) ext_individual = Image.EXTENSION.copy() for ext in exts: del Image.EXTENSION[ext] Image.register_extensions(test_format, exts) ext_multiple = Image.EXTENSION.copy() for ext in exts: del Image.EXTENSION[ext] assert ext_individual == ext_multiple def test_remap_palette(self): # Test identity transform with Image.open("Tests/images/hopper.gif") as im: assert_image_equal(im, im.remap_palette(list(range(256)))) # Test identity transform with an RGBA palette im = Image.new("P", (256, 1)) for x in range(256): im.putpixel((x, 0), x) im.putpalette(list(range(256)) * 4, "RGBA") im_remapped = im.remap_palette(list(range(256))) assert_image_equal(im, im_remapped) assert im.palette.palette == im_remapped.palette.palette # Test illegal image mode with hopper() as im: with pytest.raises(ValueError): im.remap_palette(None) def test_remap_palette_transparency(self): im = Image.new("P", (1, 2)) im.putpixel((0, 1), 1) im.info["transparency"] = 0 im_remapped = im.remap_palette([1, 0]) assert im_remapped.info["transparency"] == 1 assert len(im_remapped.getpalette()) == 6 # Test unused transparency im.info["transparency"] = 2 im_remapped = im.remap_palette([1, 0]) assert "transparency" not in im_remapped.info def test__new(self): im = hopper("RGB") im_p = hopper("P") blank_p = Image.new("P", (10, 10)) blank_pa = Image.new("PA", (10, 10)) blank_p.palette = None blank_pa.palette = None def _make_new(base_image, im, palette_result=None): new_im = base_image._new(im) assert new_im.mode == im.mode assert new_im.size == im.size assert new_im.info == base_image.info if palette_result is not None: assert new_im.palette.tobytes() == palette_result.tobytes() else: assert new_im.palette is None _make_new(im, im_p, ImagePalette.ImagePalette(list(range(256)) * 3)) _make_new(im_p, im, None) _make_new(im, blank_p, ImagePalette.ImagePalette()) _make_new(im, blank_pa, ImagePalette.ImagePalette()) def test_p_from_rgb_rgba(self): for mode, color in [ ("RGB", "#DDEEFF"), ("RGB", (221, 238, 255)), ("RGBA", (221, 238, 255, 255)), ]: im = Image.new("P", (100, 100), color) expected = Image.new(mode, (100, 100), color) assert_image_equal(im.convert(mode), expected) def test_no_resource_warning_on_save(self, tmp_path): # https://github.com/python-pillow/Pillow/issues/835 # Arrange test_file = "Tests/images/hopper.png" temp_file = str(tmp_path / "temp.jpg") # Act/Assert with Image.open(test_file) as im: with warnings.catch_warnings(): im.save(temp_file) def test_no_new_file_on_error(self, tmp_path): temp_file = str(tmp_path / "temp.jpg") im = Image.new("RGB", (0, 0)) with pytest.raises(ValueError): im.save(temp_file) assert not os.path.exists(temp_file) def test_load_on_nonexclusive_multiframe(self): with open("Tests/images/frozenpond.mpo", "rb") as fp: def act(fp): im = Image.open(fp) im.load() act(fp) with Image.open(fp) as im: im.load() assert not fp.closed def test_empty_exif(self): with Image.open("Tests/images/exif.png") as im: exif = im.getexif() assert dict(exif) # Test that exif data is cleared after another load exif.load(None) assert not dict(exif) # Test loading just the EXIF header exif.load(b"Exif\x00\x00") assert not dict(exif) @mark_if_feature_version( pytest.mark.valgrind_known_error, "libjpeg_turbo", "2.0", reason="Known Failing" ) def test_exif_jpeg(self, tmp_path): with Image.open("Tests/images/exif-72dpi-int.jpg") as im: # Little endian exif = im.getexif() assert 258 not in exif assert 274 in exif assert 282 in exif assert exif[296] == 2 assert exif[11] == "gThumb 3.0.1" out = str(tmp_path / "temp.jpg") exif[258] = 8 del exif[274] del exif[282] exif[296] = 455 exif[11] = "Pillow test" im.save(out, exif=exif) with Image.open(out) as reloaded: reloaded_exif = reloaded.getexif() assert reloaded_exif[258] == 8 assert 274 not in reloaded_exif assert 282 not in reloaded_exif assert reloaded_exif[296] == 455 assert reloaded_exif[11] == "Pillow test" with Image.open("Tests/images/no-dpi-in-exif.jpg") as im: # Big endian exif = im.getexif() assert 258 not in exif assert 306 in exif assert exif[274] == 1 assert exif[305] == "Adobe Photoshop CC 2017 (Macintosh)" out = str(tmp_path / "temp.jpg") exif[258] = 8 del exif[306] exif[274] = 455 exif[305] = "Pillow test" im.save(out, exif=exif) with Image.open(out) as reloaded: reloaded_exif = reloaded.getexif() assert reloaded_exif[258] == 8 assert 306 not in reloaded_exif assert reloaded_exif[274] == 455 assert reloaded_exif[305] == "Pillow test" @skip_unless_feature("webp") @skip_unless_feature("webp_anim") def test_exif_webp(self, tmp_path): with Image.open("Tests/images/hopper.webp") as im: exif = im.getexif() assert exif == {} out = str(tmp_path / "temp.webp") exif[258] = 8 exif[40963] = 455 exif[305] = "Pillow test" def check_exif(): with Image.open(out) as reloaded: reloaded_exif = reloaded.getexif() assert reloaded_exif[258] == 8 assert reloaded_exif[40963] == 455 assert reloaded_exif[305] == "Pillow test" im.save(out, exif=exif) check_exif() im.save(out, exif=exif, save_all=True) check_exif() def test_exif_png(self, tmp_path): with Image.open("Tests/images/exif.png") as im: exif = im.getexif() assert exif == {274: 1} out = str(tmp_path / "temp.png") exif[258] = 8 del exif[274] exif[40963] = 455 exif[305] = "Pillow test" im.save(out, exif=exif) with Image.open(out) as reloaded: reloaded_exif = reloaded.getexif() assert reloaded_exif == {258: 8, 40963: 455, 305: "Pillow test"} def test_exif_interop(self): with Image.open("Tests/images/flower.jpg") as im: exif = im.getexif() assert exif.get_ifd(0xA005) == { 1: "R98", 2: b"0100", 4097: 2272, 4098: 1704, } reloaded_exif = Image.Exif() reloaded_exif.load(exif.tobytes()) assert reloaded_exif.get_ifd(0xA005) == exif.get_ifd(0xA005) def test_exif_ifd1(self): with Image.open("Tests/images/flower.jpg") as im: exif = im.getexif() assert exif.get_ifd(ExifTags.IFD.IFD1) == { 513: 2036, 514: 5448, 259: 6, 296: 2, 282: 180.0, 283: 180.0, } def test_exif_ifd(self): with Image.open("Tests/images/flower.jpg") as im: exif = im.getexif() del exif.get_ifd(0x8769)[0xA005] reloaded_exif = Image.Exif() reloaded_exif.load(exif.tobytes()) assert reloaded_exif.get_ifd(0x8769) == exif.get_ifd(0x8769) def test_exif_load_from_fp(self): with Image.open("Tests/images/flower.jpg") as im: data = im.info["exif"] if data.startswith(b"Exif\x00\x00"): data = data[6:] fp = io.BytesIO(data) exif = Image.Exif() exif.load_from_fp(fp) assert exif == { 271: "Canon", 272: "Canon PowerShot S40", 274: 1, 282: 180.0, 283: 180.0, 296: 2, 306: "2003:12:14 12:01:44", 531: 1, 34665: 196, } def test_exif_hide_offsets(self): with Image.open("Tests/images/flower.jpg") as im: exif = im.getexif() # Check offsets are present initially assert 0x8769 in exif for tag in (0xA005, 0x927C): assert tag in exif.get_ifd(0x8769) assert exif.get_ifd(0xA005) loaded_exif = exif with Image.open("Tests/images/flower.jpg") as im: new_exif = im.getexif() for exif in (loaded_exif, new_exif): exif.hide_offsets() # Assert they are hidden afterwards, # but that the IFDs are still available assert 0x8769 not in exif assert exif.get_ifd(0x8769) for tag in (0xA005, 0x927C): assert tag not in exif.get_ifd(0x8769) assert exif.get_ifd(0xA005) @pytest.mark.parametrize("size", ((1, 0), (0, 1), (0, 0))) def test_zero_tobytes(self, size): im = Image.new("RGB", size) assert im.tobytes() == b"" def test_apply_transparency(self): im = Image.new("P", (1, 1)) im.putpalette((0, 0, 0, 1, 1, 1)) assert im.palette.colors == {(0, 0, 0): 0, (1, 1, 1): 1} # Test that no transformation is applied without transparency im.apply_transparency() assert im.palette.colors == {(0, 0, 0): 0, (1, 1, 1): 1} # Test that a transparency index is applied im.info["transparency"] = 0 im.apply_transparency() assert "transparency" not in im.info assert im.palette.colors == {(0, 0, 0, 0): 0, (1, 1, 1, 255): 1} # Test that existing transparency is kept im = Image.new("P", (1, 1)) im.putpalette((0, 0, 0, 255, 1, 1, 1, 128), "RGBA") im.info["transparency"] = 0 im.apply_transparency() assert im.palette.colors == {(0, 0, 0, 0): 0, (1, 1, 1, 128): 1} # Test that transparency bytes are applied with Image.open("Tests/images/pil123p.png") as im: assert isinstance(im.info["transparency"], bytes) assert im.palette.colors[(27, 35, 6)] == 24 im.apply_transparency() assert im.palette.colors[(27, 35, 6, 214)] == 24 def test_categories_deprecation(self): with pytest.warns(DeprecationWarning): assert hopper().category == 0 with pytest.warns(DeprecationWarning): assert Image.NORMAL == 0 with pytest.warns(DeprecationWarning): assert Image.SEQUENCE == 1 with pytest.warns(DeprecationWarning): assert Image.CONTAINER == 2 def test_constants(self): with pytest.warns(DeprecationWarning): assert Image.LINEAR == Image.Resampling.BILINEAR with pytest.warns(DeprecationWarning): assert Image.CUBIC == Image.Resampling.BICUBIC with pytest.warns(DeprecationWarning): assert Image.ANTIALIAS == Image.Resampling.LANCZOS for enum in ( Image.Transpose, Image.Transform, Image.Resampling, Image.Dither, Image.Palette, Image.Quantize, ): for name in enum.__members__: assert getattr(Image, name) == enum[name] @pytest.mark.parametrize( "path", [ "fli_overrun.bin", "sgi_overrun.bin", "sgi_overrun_expandrow.bin", "sgi_overrun_expandrow2.bin", "pcx_overrun.bin", "pcx_overrun2.bin", "ossfuzz-4836216264589312.pcx", "01r_00.pcx", ], ) def test_overrun(self, path): """For overrun completeness, test as: valgrind pytest -qq Tests/test_image.py::TestImage::test_overrun | grep decode.c """ with Image.open(os.path.join("Tests/images", path)) as im: try: im.load() assert False except OSError as e: buffer_overrun = str(e) == "buffer overrun when reading image file" truncated = "image file is truncated" in str(e) assert buffer_overrun or truncated def test_fli_overrun2(self): with Image.open("Tests/images/fli_overrun2.bin") as im: try: im.seek(1) assert False except OSError as e: assert str(e) == "buffer overrun when reading image file" class MockEncoder: pass def mock_encode(*args): encoder = MockEncoder() encoder.args = args return encoder class TestRegistry: def test_encode_registry(self): Image.register_encoder("MOCK", mock_encode) assert "MOCK" in Image.ENCODERS enc = Image._getencoder("RGB", "MOCK", ("args",), extra=("extra",)) assert isinstance(enc, MockEncoder) assert enc.args == ("RGB", "args", "extra") def test_encode_registry_fail(self): with pytest.raises(OSError): Image._getencoder("RGB", "DoesNotExist", ("args",), extra=("extra",))