Randomize test order

tests/conftest.py

@@ -0,0 +1,40 @@
+from __future__ import annotations
+
+import os
+import shutil
+import sys
+import tempfile
+from contextlib import suppress
+from pathlib import Path
+from typing import Any
+
+
+def pytest_configure() -> None:
+    """Isolate persistent app state per xdist worker to avoid cross-worker test interference."""
+    worker_id: str = os.environ.get("PYTEST_XDIST_WORKER", "gw0")
+    worker_data_dir: Path = Path(tempfile.gettempdir()) / "discord-rss-bot-tests" / worker_id
+
+    # Start each worker from a clean state.
+    shutil.rmtree(worker_data_dir, ignore_errors=True)
+    worker_data_dir.mkdir(parents=True, exist_ok=True)
+
+    os.environ["DISCORD_RSS_BOT_DATA_DIR"] = str(worker_data_dir)
+
+    # If modules were imported before this hook (unlikely), force them to use
+    # the worker-specific location.
+    settings_module: Any = sys.modules.get("discord_rss_bot.settings")
+    if settings_module is not None:
+        settings_module.data_dir = str(worker_data_dir)
+        get_reader: Any = getattr(settings_module, "get_reader", None)
+        if get_reader is not None and hasattr(get_reader, "cache_clear"):
+            get_reader.cache_clear()
+
+    main_module: Any = sys.modules.get("discord_rss_bot.main")
+    if main_module is not None and settings_module is not None:
+        with suppress(Exception):
+            current_reader = getattr(main_module, "reader", None)
+            if current_reader is not None:
+                current_reader.close()
+        get_reader: Any = getattr(settings_module, "get_reader", None)
+        if callable(get_reader):
+            main_module.reader = get_reader()