Added type hints

Tests/test_000_sanity.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 from PIL import Image
 
 
-def test_sanity():
+def test_sanity() -> None:
     # Make sure we have the binary extension
     Image.core.new("L", (100, 100))
 

Tests/test_binary.py

@@ -3,12 +3,12 @@ from __future__ import annotations
 from PIL import _binary
 
 
-def test_standard():
+def test_standard() -> None:
     assert _binary.i8(b"*") == 42
     assert _binary.o8(42) == b"*"
 
 
-def test_little_endian():
+def test_little_endian() -> None:
     assert _binary.i16le(b"\xff\xff\x00\x00") == 65535
     assert _binary.i32le(b"\xff\xff\x00\x00") == 65535
 
@@ -16,7 +16,7 @@ def test_little_endian():
     assert _binary.o32le(65535) == b"\xff\xff\x00\x00"
 
 
-def test_big_endian():
+def test_big_endian() -> None:
     assert _binary.i16be(b"\x00\x00\xff\xff") == 0
     assert _binary.i32be(b"\x00\x00\xff\xff") == 65535
 

Tests/test_file_cur.py

@@ -7,7 +7,7 @@ from PIL import CurImagePlugin, Image
 TEST_FILE = "Tests/images/deerstalker.cur"
 
 
-def test_sanity():
+def test_sanity() -> None:
     with Image.open(TEST_FILE) as im:
         assert im.size == (32, 32)
         assert isinstance(im, CurImagePlugin.CurImageFile)
@@ -17,7 +17,7 @@ def test_sanity():
         assert im.getpixel((16, 16)) == (84, 87, 86, 255)
 
 
-def test_invalid_file():
+def test_invalid_file() -> None:
     invalid_file = "Tests/images/flower.jpg"
 
     with pytest.raises(SyntaxError):

Tests/test_file_ftex.py

@@ -7,18 +7,18 @@ from PIL import FtexImagePlugin, Image
 from .helper import assert_image_equal_tofile, assert_image_similar
 
 
-def test_load_raw():
+def test_load_raw() -> None:
     with Image.open("Tests/images/ftex_uncompressed.ftu") as im:
         assert_image_equal_tofile(im, "Tests/images/ftex_uncompressed.png")
 
 
-def test_load_dxt1():
+def test_load_dxt1() -> None:
     with Image.open("Tests/images/ftex_dxt1.ftc") as im:
         with Image.open("Tests/images/ftex_dxt1.png") as target:
             assert_image_similar(im, target.convert("RGBA"), 15)
 
 
-def test_invalid_file():
+def test_invalid_file() -> None:
     invalid_file = "Tests/images/flower.jpg"
 
     with pytest.raises(SyntaxError):

Tests/test_file_gbr.py

@@ -7,12 +7,12 @@ from PIL import GbrImagePlugin, Image
 from .helper import assert_image_equal_tofile
 
 
-def test_gbr_file():
+def test_gbr_file() -> None:
     with Image.open("Tests/images/gbr.gbr") as im:
         assert_image_equal_tofile(im, "Tests/images/gbr.png")
 
 
-def test_load():
+def test_load() -> None:
     with Image.open("Tests/images/gbr.gbr") as im:
         assert im.load()[0, 0] == (0, 0, 0, 0)
 
@@ -20,14 +20,14 @@ def test_load():
         assert im.load()[0, 0] == (0, 0, 0, 0)
 
 
-def test_multiple_load_operations():
+def test_multiple_load_operations() -> None:
     with Image.open("Tests/images/gbr.gbr") as im:
         im.load()
         im.load()
         assert_image_equal_tofile(im, "Tests/images/gbr.png")
 
 
-def test_invalid_file():
+def test_invalid_file() -> None:
     invalid_file = "Tests/images/flower.jpg"
 
     with pytest.raises(SyntaxError):

Tests/test_file_gd.py

@@ -7,18 +7,18 @@ from PIL import GdImageFile, UnidentifiedImageError
 TEST_GD_FILE = "Tests/images/hopper.gd"
 
 
-def test_sanity():
+def test_sanity() -> None:
     with GdImageFile.open(TEST_GD_FILE) as im:
         assert im.size == (128, 128)
         assert im.format == "GD"
 
 
-def test_bad_mode():
+def test_bad_mode() -> None:
     with pytest.raises(ValueError):
         GdImageFile.open(TEST_GD_FILE, "bad mode")
 
 
-def test_invalid_file():
+def test_invalid_file() -> None:
     invalid_file = "Tests/images/flower.jpg"
 
     with pytest.raises(UnidentifiedImageError):

Tests/test_file_gimppalette.py

@@ -5,7 +5,7 @@ import pytest
 from PIL.GimpPaletteFile import GimpPaletteFile
 
 
-def test_sanity():
+def test_sanity() -> None:
     with open("Tests/images/test.gpl", "rb") as fp:
         GimpPaletteFile(fp)
 
@@ -22,7 +22,7 @@ def test_sanity():
             GimpPaletteFile(fp)
 
 
-def test_get_palette():
+def test_get_palette() -> None:
     # Arrange
     with open("Tests/images/custom_gimp_palette.gpl", "rb") as fp:
         palette_file = GimpPaletteFile(fp)

Tests/test_file_imt.py

@@ -9,13 +9,13 @@ from PIL import Image, ImtImagePlugin
 from .helper import assert_image_equal_tofile
 
 
-def test_sanity():
+def test_sanity() -> None:
     with Image.open("Tests/images/bw_gradient.imt") as im:
         assert_image_equal_tofile(im, "Tests/images/bw_gradient.png")
 
 
 @pytest.mark.parametrize("data", (b"\n", b"\n-", b"width 1\n"))
-def test_invalid_file(data):
+def test_invalid_file(data: bytes) -> None:
     with io.BytesIO(data) as fp:
         with pytest.raises(SyntaxError):
             ImtImagePlugin.ImtImageFile(fp)

Tests/test_file_mcidas.py

@@ -7,14 +7,14 @@ from PIL import Image, McIdasImagePlugin
 from .helper import assert_image_equal_tofile
 
 
-def test_invalid_file():
+def test_invalid_file() -> None:
     invalid_file = "Tests/images/flower.jpg"
 
     with pytest.raises(SyntaxError):
         McIdasImagePlugin.McIdasImageFile(invalid_file)
 
 
-def test_valid_file():
+def test_valid_file() -> None:
     # Arrange
     # https://ghrc.nsstc.nasa.gov/hydro/details/cmx3g8
     # https://ghrc.nsstc.nasa.gov/pub/fieldCampaigns/camex3/cmx3g8/browse/

Tests/test_file_pcd.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 from PIL import Image
 
 
-def test_load_raw():
+def test_load_raw() -> None:
     with Image.open("Tests/images/hopper.pcd") as im:
         im.load()  # should not segfault.
 

Tests/test_file_pixar.py

@@ -9,7 +9,7 @@ from .helper import assert_image_similar, hopper
 TEST_FILE = "Tests/images/hopper.pxr"
 
 
-def test_sanity():
+def test_sanity() -> None:
     with Image.open(TEST_FILE) as im:
         im.load()
         assert im.mode == "RGB"
@@ -21,7 +21,7 @@ def test_sanity():
         assert_image_similar(im, im2, 4.8)
 
 
-def test_invalid_file():
+def test_invalid_file() -> None:
     invalid_file = "Tests/images/flower.jpg"
 
     with pytest.raises(SyntaxError):

Tests/test_file_qoi.py

@@ -7,7 +7,7 @@ from PIL import Image, QoiImagePlugin
 from .helper import assert_image_equal_tofile
 
 
-def test_sanity():
+def test_sanity() -> None:
     with Image.open("Tests/images/hopper.qoi") as im:
         assert im.mode == "RGB"
         assert im.size == (128, 128)
@@ -23,7 +23,7 @@ def test_sanity():
         assert_image_equal_tofile(im, "Tests/images/pil123rgba.png")
 
 
-def test_invalid_file():
+def test_invalid_file() -> None:
     invalid_file = "Tests/images/flower.jpg"
 
     with pytest.raises(SyntaxError):

Tests/test_file_wal.py

@@ -7,7 +7,7 @@ from .helper import assert_image_equal_tofile
 TEST_FILE = "Tests/images/hopper.wal"
 
 
-def test_open():
+def test_open() -> None:
     with WalImageFile.open(TEST_FILE) as im:
         assert im.format == "WAL"
         assert im.format_description == "Quake2 Texture"
@@ -19,7 +19,7 @@ def test_open():
         assert_image_equal_tofile(im, "Tests/images/hopper_wal.png")
 
 
-def test_load():
+def test_load() -> None:
     with WalImageFile.open(TEST_FILE) as im:
         assert im.load()[0, 0] == 122
 

Tests/test_file_webp_lossless.py

@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+from pathlib import Path
+
 import pytest
 
 from PIL import Image
@@ -10,7 +12,7 @@ _webp = pytest.importorskip("PIL._webp", reason="WebP support not installed")
 RGB_MODE = "RGB"
 
 
-def test_write_lossless_rgb(tmp_path):
+def test_write_lossless_rgb(tmp_path: Path) -> None:
     if _webp.WebPDecoderVersion() < 0x0200:
         pytest.skip("lossless not included")
 

Tests/test_file_xpm.py

@@ -9,7 +9,7 @@ from .helper import assert_image_similar, hopper
 TEST_FILE = "Tests/images/hopper.xpm"
 
 
-def test_sanity():
+def test_sanity() -> None:
     with Image.open(TEST_FILE) as im:
         im.load()
         assert im.mode == "P"
@@ -20,14 +20,14 @@ def test_sanity():
         assert_image_similar(im.convert("RGB"), hopper("RGB"), 60)
 
 
-def test_invalid_file():
+def test_invalid_file() -> None:
     invalid_file = "Tests/images/flower.jpg"
 
     with pytest.raises(SyntaxError):
         XpmImagePlugin.XpmImageFile(invalid_file)
 
 
-def test_load_read():
+def test_load_read() -> None:
     # Arrange
     with Image.open(TEST_FILE) as im:
         dummy_bytes = 1

Tests/test_file_xvthumb.py

@@ -9,7 +9,7 @@ from .helper import assert_image_similar, hopper
 TEST_FILE = "Tests/images/hopper.p7"
 
 
-def test_open():
+def test_open() -> None:
     # Act
     with Image.open(TEST_FILE) as im:
         # Assert
@@ -20,7 +20,7 @@ def test_open():
         assert_image_similar(im, im_hopper, 9)
 
 
-def test_unexpected_eof():
+def test_unexpected_eof() -> None:
     # Test unexpected EOF reading XV thumbnail file
     # Arrange
     bad_file = "Tests/images/hopper_bad.p7"
@@ -30,7 +30,7 @@ def test_unexpected_eof():
         XVThumbImagePlugin.XVThumbImageFile(bad_file)
 
 
-def test_invalid_file():
+def test_invalid_file() -> None:
     # Arrange
     invalid_file = "Tests/images/flower.jpg"
 

Tests/test_fontfile.py

@@ -1,11 +1,13 @@
 from __future__ import annotations
 
+from pathlib import Path
+
 import pytest
 
 from PIL import FontFile
 
 
-def test_save(tmp_path):
+def test_save(tmp_path: Path) -> None:
     tempname = str(tmp_path / "temp.pil")
 
     font = FontFile.FontFile()

Tests/test_format_lab.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 from PIL import Image
 
 
-def test_white():
+def test_white() -> None:
     with Image.open("Tests/images/lab.tif") as i:
         i.load()
 
@@ -24,7 +24,7 @@ def test_white():
     assert list(b) == [128] * 100
 
 
-def test_green():
+def test_green() -> None:
     # l= 50 (/100), a = -100 (-128 .. 128) b=0 in PS
     # == RGB: 0, 152, 117
     with Image.open("Tests/images/lab-green.tif") as i:
@@ -32,7 +32,7 @@ def test_green():
     assert k == (128, 28, 128)
 
 
-def test_red():
+def test_red() -> None:
     # l= 50 (/100), a = 100 (-128 .. 128) b=0 in PS
     # == RGB: 255, 0, 124
     with Image.open("Tests/images/lab-red.tif") as i:

Tests/test_lib_image.py

@@ -5,7 +5,7 @@ import pytest
 from PIL import Image
 
 
-def test_setmode():
+def test_setmode() -> None:
     im = Image.new("L", (1, 1), 255)
     im.im.setmode("1")
     assert im.im.getpixel((0, 0)) == 255

Tests/test_locale.py

@@ -24,7 +24,7 @@ from PIL import Image
 path = "Tests/images/hopper.jpg"
 
 
-def test_sanity():
+def test_sanity() -> None:
     with Image.open(path):
         pass
     try:

Tests/test_main.py

@@ -5,7 +5,7 @@ import subprocess
 import sys
 
 
-def test_main():
+def test_main() -> None:
     out = subprocess.check_output([sys.executable, "-m", "PIL"]).decode("utf-8")
     lines = out.splitlines()
     assert lines[0] == "-" * 68

Tests/test_pyroma.py

@@ -7,7 +7,7 @@ from PIL import __version__
 pyroma = pytest.importorskip("pyroma", reason="Pyroma not installed")
 
 
-def test_pyroma():
+def test_pyroma() -> None:
     # Arrange
     data = pyroma.projectdata.get_data(".")
 

Tests/test_uploader.py

@@ -3,13 +3,13 @@ from __future__ import annotations
 from .helper import assert_image_equal, assert_image_similar, hopper
 
 
-def check_upload_equal():
+def check_upload_equal() -> None:
     result = hopper("P").convert("RGB")
     target = hopper("RGB")
     assert_image_equal(result, target)
 
 
-def check_upload_similar():
+def check_upload_similar() -> None:
     result = hopper("P").convert("RGB")
     target = hopper("RGB")
     assert_image_similar(result, target, 0)

Tests/test_util.py

@@ -1,11 +1,13 @@
 from __future__ import annotations
 
+from pathlib import Path
+
 import pytest
 
 from PIL import _util
 
 
-def test_is_path():
+def test_is_path() -> None:
     # Arrange
     fp = "filename.ext"
 
@@ -16,7 +18,7 @@ def test_is_path():
     assert it_is
 
 
-def test_path_obj_is_path():
+def test_path_obj_is_path() -> None:
     # Arrange
     from pathlib import Path
 
@@ -29,7 +31,7 @@ def test_path_obj_is_path():
     assert it_is
 
 
-def test_is_not_path(tmp_path):
+def test_is_not_path(tmp_path: Path) -> None:
     # Arrange
     with (tmp_path / "temp.ext").open("w") as fp:
         pass
@@ -41,7 +43,7 @@ def test_is_not_path(tmp_path):
     assert not it_is_not
 
 
-def test_is_directory():
+def test_is_directory() -> None:
     # Arrange
     directory = "Tests"
 
@@ -52,7 +54,7 @@ def test_is_directory():
     assert it_is
 
 
-def test_is_not_directory():
+def test_is_not_directory() -> None:
     # Arrange
     text = "abc"
 
@@ -63,7 +65,7 @@ def test_is_not_directory():
     assert not it_is_not
 
 
-def test_deferred_error():
+def test_deferred_error() -> None:
     # Arrange
 
     # Act

Tests/test_webp_leaks.py

@@ -14,11 +14,11 @@ class TestWebPLeaks(PillowLeakTestCase):
     mem_limit = 3 * 1024  # kb
     iterations = 100
 
-    def test_leak_load(self):
+    def test_leak_load(self) -> None:
         with open(test_file, "rb") as f:
             im_data = f.read()
 
-        def core():
+        def core() -> None:
             with Image.open(BytesIO(im_data)) as im:
                 im.load()