Simplified test code

Tests/check_j2k_overflow.py

@@ -9,6 +9,6 @@
 
 def test_j2k_overflow(tmp_path: Path) -> None:
     im = Image.new("RGBA", (1024, 131584))
-    target = str(tmp_path / "temp.jpc")
+    target = tmp_path / "temp.jpc"
     with pytest.raises(OSError):
         im.save(target)

Tests/check_large_memory.py

@@ -32,7 +32,7 @@
 
 
 def _write_png(tmp_path: Path, xdim: int, ydim: int) -> None:
-    f = str(tmp_path / "temp.png")
+    f = tmp_path / "temp.png"
     im = Image.new("L", (xdim, ydim), 0)
     im.save(f)
 

Tests/check_large_memory_numpy.py

@@ -28,7 +28,7 @@
 def _write_png(tmp_path: Path, xdim: int, ydim: int) -> None:
     dtype = np.uint8
     a = np.zeros((xdim, ydim), dtype=dtype)
-    f = str(tmp_path / "temp.png")
+    f = tmp_path / "temp.png"
     im = Image.fromarray(a, "L")
     im.save(f)
 

Tests/helper.py

@@ -13,6 +13,7 @@
 from collections.abc import Sequence
 from functools import lru_cache
 from io import BytesIO
+from pathlib import Path
 from typing import Any, Callable
 
 import pytest
@@ -95,7 +96,10 @@ def assert_image_equal(a: Image.Image, b: Image.Image, msg: str | None = None) -
 
 
 def assert_image_equal_tofile(
-    a: Image.Image, filename: str, msg: str | None = None, mode: str | None = None
+    a: Image.Image,
+    filename: str | Path,
+    msg: str | None = None,
+    mode: str | None = None,
 ) -> None:
     with Image.open(filename) as img:
         if mode:
@@ -136,7 +140,7 @@ def assert_image_similar(
 
 def assert_image_similar_tofile(
     a: Image.Image,
-    filename: str,
+    filename: str | Path,
     epsilon: float,
     msg: str | None = None,
 ) -> None:

Tests/test_file_apng.py

@@ -345,7 +345,7 @@ def test_apng_sequence_errors(test_file: str) -> None:
 
 def test_apng_save(tmp_path: Path) -> None:
     with Image.open("Tests/images/apng/single_frame.png") as im:
-        test_file = str(tmp_path / "temp.png")
+        test_file = tmp_path / "temp.png"
         im.save(test_file, save_all=True)
 
     with Image.open(test_file) as im:
@@ -375,7 +375,7 @@ def test_apng_save(tmp_path: Path) -> None:
 
 
 def test_apng_save_alpha(tmp_path: Path) -> None:
-    test_file = str(tmp_path / "temp.png")
+    test_file = tmp_path / "temp.png"
 
     im = Image.new("RGBA", (1, 1), (255, 0, 0, 255))
     im2 = Image.new("RGBA", (1, 1), (255, 0, 0, 127))
@@ -393,7 +393,7 @@ def test_apng_save_split_fdat(tmp_path: Path) -> None:
     # frames with image data spanning multiple fdAT chunks (in this case
     # both the default image and first animation frame will span multiple
     # data chunks)
-    test_file = str(tmp_path / "temp.png")
+    test_file = tmp_path / "temp.png"
     with Image.open("Tests/images/old-style-jpeg-compression.png") as im:
         frames = [im.copy(), Image.new("RGBA", im.size, (255, 0, 0, 255))]
         im.save(
@@ -408,7 +408,7 @@ def test_apng_save_split_fdat(tmp_path: Path) -> None:
 
 
 def test_apng_save_duration_loop(tmp_path: Path) -> None:
-    test_file = str(tmp_path / "temp.png")
+    test_file = tmp_path / "temp.png"
     with Image.open("Tests/images/apng/delay.png") as im:
         frames = []
         durations = []
@@ -471,7 +471,7 @@ def test_apng_save_duration_loop(tmp_path: Path) -> None:
 
 
 def test_apng_save_disposal(tmp_path: Path) -> None:
-    test_file = str(tmp_path / "temp.png")
+    test_file = tmp_path / "temp.png"
     size = (128, 64)
     red = Image.new("RGBA", size, (255, 0, 0, 255))
     green = Image.new("RGBA", size, (0, 255, 0, 255))
@@ -572,7 +572,7 @@ def test_apng_save_disposal(tmp_path: Path) -> None:
 
 
 def test_apng_save_disposal_previous(tmp_path: Path) -> None:
-    test_file = str(tmp_path / "temp.png")
+    test_file = tmp_path / "temp.png"
     size = (128, 64)
     blue = Image.new("RGBA", size, (0, 0, 255, 255))
     red = Image.new("RGBA", size, (255, 0, 0, 255))
@@ -594,7 +594,7 @@ def test_apng_save_disposal_previous(tmp_path: Path) -> None:
 
 
 def test_apng_save_blend(tmp_path: Path) -> None:
-    test_file = str(tmp_path / "temp.png")
+    test_file = tmp_path / "temp.png"
     size = (128, 64)
     red = Image.new("RGBA", size, (255, 0, 0, 255))
     green = Image.new("RGBA", size, (0, 255, 0, 255))
@@ -662,7 +662,7 @@ def test_apng_save_blend(tmp_path: Path) -> None:
 
 
 def test_apng_save_size(tmp_path: Path) -> None:
-    test_file = str(tmp_path / "temp.png")
+    test_file = tmp_path / "temp.png"
 
     im = Image.new("L", (100, 100))
     im.save(test_file, save_all=True, append_images=[Image.new("L", (200, 200))])
@@ -686,7 +686,7 @@ def test_seek_after_close() -> None:
 def test_different_modes_in_later_frames(
     mode: str, default_image: bool, duplicate: bool, tmp_path: Path
 ) -> None:
-    test_file = str(tmp_path / "temp.png")
+    test_file = tmp_path / "temp.png"
 
     im = Image.new("L", (1, 1))
     im.save(
@@ -700,7 +700,7 @@ def test_different_modes_in_later_frames(
 
 
 def test_different_durations(tmp_path: Path) -> None:
-    test_file = str(tmp_path / "temp.png")
+    test_file = tmp_path / "temp.png"
 
     with Image.open("Tests/images/apng/different_durations.png") as im:
         for _ in range(3):

Tests/test_file_blp.py

@@ -46,7 +46,7 @@ def test_invalid_file() -> None:
 
 
 def test_save(tmp_path: Path) -> None:
-    f = str(tmp_path / "temp.blp")
+    f = tmp_path / "temp.blp"
 
     for version in ("BLP1", "BLP2"):
         im = hopper("P")
@@ -56,7 +56,7 @@ def test_save(tmp_path: Path) -> None:
             assert_image_equal(im.convert("RGB"), reloaded)
 
         with Image.open("Tests/images/transparent.png") as im:
-            f = str(tmp_path / "temp.blp")
+            f = tmp_path / "temp.blp"
             im.convert("P").save(f, blp_version=version)
 
             with Image.open(f) as reloaded:

Tests/test_file_bmp.py

@@ -17,7 +17,7 @@
 
 def test_sanity(tmp_path: Path) -> None:
     def roundtrip(im: Image.Image) -> None:
-        outfile = str(tmp_path / "temp.bmp")
+        outfile = tmp_path / "temp.bmp"
 
         im.save(outfile, "BMP")
 
@@ -66,15 +66,15 @@ def test_small_palette(tmp_path: Path) -> None:
     colors = [0, 0, 0, 125, 125, 125, 255, 255, 255]
     im.putpalette(colors)
 
-    out = str(tmp_path / "temp.bmp")
+    out = tmp_path / "temp.bmp"
     im.save(out)
 
     with Image.open(out) as reloaded:
         assert reloaded.getpalette() == colors
 
 
 def test_save_too_large(tmp_path: Path) -> None:
-    outfile = str(tmp_path / "temp.bmp")
+    outfile = tmp_path / "temp.bmp"
     with Image.new("RGB", (1, 1)) as im:
         im._size = (37838, 37838)
         with pytest.raises(ValueError):
@@ -96,7 +96,7 @@ def test_dpi() -> None:
 def test_save_bmp_with_dpi(tmp_path: Path) -> None:
     # Test for #1301
     # Arrange
-    outfile = str(tmp_path / "temp.jpg")
+    outfile = tmp_path / "temp.jpg"
     with Image.open("Tests/images/hopper.bmp") as im:
         assert im.info["dpi"] == (95.98654816726399, 95.98654816726399)
 
@@ -112,7 +112,7 @@ def test_save_bmp_with_dpi(tmp_path: Path) -> None:
 
 
 def test_save_float_dpi(tmp_path: Path) -> None:
-    outfile = str(tmp_path / "temp.bmp")
+    outfile = tmp_path / "temp.bmp"
     with Image.open("Tests/images/hopper.bmp") as im:
         im.save(outfile, dpi=(72.21216100543306, 72.21216100543306))
         with Image.open(outfile) as reloaded:
@@ -152,7 +152,7 @@ def test_dib_header_size(header_size: int, path: str) -> None:
 
 
 def test_save_dib(tmp_path: Path) -> None:
-    outfile = str(tmp_path / "temp.dib")
+    outfile = tmp_path / "temp.dib"
 
     with Image.open("Tests/images/clipboard.dib") as im:
         im.save(outfile)

Tests/test_file_bufrstub.py

@@ -43,7 +43,7 @@ def test_load() -> None:
 def test_save(tmp_path: Path) -> None:
     # Arrange
     im = hopper()
-    tmpfile = str(tmp_path / "temp.bufr")
+    tmpfile = tmp_path / "temp.bufr"
 
     # Act / Assert: stub cannot save without an implemented handler
     with pytest.raises(OSError):
@@ -79,7 +79,7 @@ def save(self, im: Image.Image, fp: IO[bytes], filename: str) -> None:
         im.load()
         assert handler.is_loaded()
 
-        temp_file = str(tmp_path / "temp.bufr")
+        temp_file = tmp_path / "temp.bufr"
         im.save(temp_file)
         assert handler.saved
 

Tests/test_file_dds.py

@@ -116,7 +116,7 @@ def test_sanity_ati1_bc4u(image_path: str) -> None:
 
 
 def test_dx10_bc2(tmp_path: Path) -> None:
-    out = str(tmp_path / "temp.dds")
+    out = tmp_path / "temp.dds"
     with Image.open(TEST_FILE_DXT3) as im:
         im.save(out, pixel_format="BC2")
 
@@ -129,7 +129,7 @@ def test_dx10_bc2(tmp_path: Path) -> None:
 
 
 def test_dx10_bc3(tmp_path: Path) -> None:
-    out = str(tmp_path / "temp.dds")
+    out = tmp_path / "temp.dds"
     with Image.open(TEST_FILE_DXT5) as im:
         im.save(out, pixel_format="BC3")
 
@@ -400,7 +400,7 @@ def test_not_implemented(test_file: str) -> None:
 
 
 def test_save_unsupported_mode(tmp_path: Path) -> None:
-    out = str(tmp_path / "temp.dds")
+    out = tmp_path / "temp.dds"
     im = hopper("HSV")
     with pytest.raises(OSError, match="cannot write mode HSV as DDS"):
         im.save(out)
@@ -416,7 +416,7 @@ def test_save_unsupported_mode(tmp_path: Path) -> None:
     ],
 )
 def test_save(mode: str, test_file: str, tmp_path: Path) -> None:
-    out = str(tmp_path / "temp.dds")
+    out = tmp_path / "temp.dds"
     with Image.open(test_file) as im:
         assert im.mode == mode
         im.save(out)
@@ -425,15 +425,15 @@ def test_save(mode: str, test_file: str, tmp_path: Path) -> None:
 
 
 def test_save_unsupported_pixel_format(tmp_path: Path) -> None:
-    out = str(tmp_path / "temp.dds")
+    out = tmp_path / "temp.dds"
     im = hopper()
     with pytest.raises(OSError, match="cannot write pixel format UNKNOWN"):
         im.save(out, pixel_format="UNKNOWN")
 
 
 def test_save_dxt1(tmp_path: Path) -> None:
     # RGB
-    out = str(tmp_path / "temp.dds")
+    out = tmp_path / "temp.dds"
     with Image.open(TEST_FILE_DXT1) as im:
         im.convert("RGB").save(out, pixel_format="DXT1")
     assert_image_similar_tofile(im, out, 1.84)
@@ -458,7 +458,7 @@ def test_save_dxt1(tmp_path: Path) -> None:
 
 def test_save_dxt3(tmp_path: Path) -> None:
     # RGB
-    out = str(tmp_path / "temp.dds")
+    out = tmp_path / "temp.dds"
     with Image.open(TEST_FILE_DXT3) as im:
         im_rgb = im.convert("RGB")
     im_rgb.save(out, pixel_format="DXT3")
@@ -481,7 +481,7 @@ def test_save_dxt3(tmp_path: Path) -> None:
 
 def test_save_dxt5(tmp_path: Path) -> None:
     # RGB
-    out = str(tmp_path / "temp.dds")
+    out = tmp_path / "temp.dds"
     with Image.open(TEST_FILE_DXT1) as im:
         im.convert("RGB").save(out, pixel_format="DXT5")
     assert_image_similar_tofile(im, out, 1.84)
@@ -503,7 +503,7 @@ def test_save_dxt5(tmp_path: Path) -> None:
 
 
 def test_save_dx10_bc5(tmp_path: Path) -> None:
-    out = str(tmp_path / "temp.dds")
+    out = tmp_path / "temp.dds"
     with Image.open(TEST_FILE_DX10_BC5_TYPELESS) as im:
         im.save(out, pixel_format="BC5")
     assert_image_similar_tofile(im, out, 9.56)

Tests/test_file_eps.py

@@ -239,7 +239,7 @@ def test_transparency() -> None:
 def test_file_object(tmp_path: Path) -> None:
     # issue 479
     with Image.open(FILE1) as image1:
-        with open(str(tmp_path / "temp.eps"), "wb") as fh:
+        with open(tmp_path / "temp.eps", "wb") as fh:
             image1.save(fh, "EPS")
 
 
@@ -274,7 +274,7 @@ def test_1(filename: str) -> None:
 
 def test_image_mode_not_supported(tmp_path: Path) -> None:
     im = hopper("RGBA")
-    tmpfile = str(tmp_path / "temp.eps")
+    tmpfile = tmp_path / "temp.eps"
     with pytest.raises(ValueError):
         im.save(tmpfile)