Tighten ruff rules and modernize style

tests/conftest.py

@@ -23,9 +23,10 @@ class Gs106WarningFilter(logging.Filter):
 
     def filter(self, record: logging.LogRecord) -> bool:
         # Allow all records except the expected Ghostscript 10.6.x warning
-        if "Ghostscript 10.6.x contains JPEG encoding errors" in record.getMessage():
-            return False
-        return True
+        return (
+            "Ghostscript 10.6.x contains JPEG encoding errors"
+            not in record.getMessage()
+        )
 
 
 @pytest.fixture(autouse=True)

tests/test_json_serialization.py

@@ -1,4 +1,5 @@
 """Test JSON serialization of OcrOptions for multiprocessing compatibility."""
+from __future__ import annotations
 
 import multiprocessing
 from io import BytesIO

tests/test_metadata.py

@@ -3,9 +3,8 @@
 
 from __future__ import annotations
 
-import datetime
+import datetime as dt
 import warnings
-from datetime import timezone
 from shutil import copyfile
 
 import pikepdf
@@ -198,10 +197,7 @@ def test_creation_date_preserved(output_type, resources, infile, outpdf):
 
         # We expect that the modified date is quite recent
         date_after = decode_pdf_date(str(after['/ModDate']))
-        assert (
-            seconds_between_dates(date_after, datetime.datetime.now(timezone.utc))
-            < 1000
-        )
+        assert seconds_between_dates(date_after, dt.datetime.now(dt.UTC)) < 1000
 
 
 @pytest.fixture

tests/test_multilingual_direct.py

@@ -10,6 +10,7 @@ This tests the fpdf2 renderer with various language groups:
 - CJK (Chinese Simplified/Traditional, Japanese, Korean)
 - Devanagari (Hindi, Sanskrit)
 """
+from __future__ import annotations
 
 import shutil
 import subprocess

tests/test_unpaper.py

@@ -119,7 +119,7 @@ def test_unpaper_args_invalid(resources, outpdf):
 def test_unpaper_image_too_big(resources, outdir, caplog):
     with patch('ocrmypdf._exec.unpaper.UNPAPER_IMAGE_PIXEL_LIMIT', 42):
         infile = resources / 'crom.png'
-        unpaper.clean(infile, outdir / 'out.png', dpi=300) == infile
+        assert unpaper.clean(infile, outdir / 'out.png', dpi=300) == infile
 
         assert any(
             'too large for cleaning' in rec.message

tests/test_watcher.py

@@ -1,4 +1,6 @@
-import datetime
+from __future__ import annotations
+
+import datetime as dt
 import os
 import shutil
 import subprocess
@@ -43,8 +45,8 @@ def test_watcher(tmp_path, resources, year_month):
     if year_month:
         assert (
             output_dir
-            / f'{datetime.date.today().year}'
-            / f'{datetime.date.today().month:02d}'
+            / f'{dt.date.today().year}'
+            / f'{dt.date.today().month:02d}'
             / 'trivial.pdf'
         ).exists()
     else: