Improved code quality with more idiomatic Python patterns and safer initialization.

tests/__init__.py

@@ -1 +1,15 @@
+# Copyright 2026 Logan Fick
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 """Test suite for Crabstero."""

tests/conftest.py

@@ -21,12 +21,12 @@ import pytest
 from crabstero.database import Database
 
 if TYPE_CHECKING:
-    from collections.abc import AsyncIterator
+    from collections.abc import AsyncGenerator
     from pathlib import Path
 
 
 @pytest.fixture
-async def db(tmp_path: Path) -> AsyncIterator[Database]:
+async def db(tmp_path: Path) -> AsyncGenerator[Database]:
     """Yield a Database backed by a temporary SQLite file."""
     database = await Database.connect(str(tmp_path / "test.db"))
     yield database

tests/test_uningest.py

@@ -55,7 +55,7 @@ class TestIngestUningestCycle:
 
         assert await db.get_random_image(1) is None
 
-    async def test_cache_round_trip(self) -> None:
+    def test_cache_round_trip(self) -> None:
         """Cache put then pop returns the original entry."""
         cache = IngestCache()
         entry = CachedMessage(