Fix for Python 3.12

.github/workflows/test.yml

@@ -85,7 +85,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.8", "3.11"]
+        python-version: ["3.8", "3.12"]
         # PyPy is not supported because we use the file_id_manager. See:
         # https://github.com/jupyter-server/jupyter_server_fileid/issues/44
         #include:

pyproject.toml

@@ -141,6 +141,8 @@ filterwarnings = [
     "module:Jupyter is migrating its paths to use standard platformdirs:DeprecationWarning",
     # In PyPy/Cython: see https://github.com/yaml/pyyaml/issues/688
     "ignore:can't resolve package from __spec__ or __package__, falling back on __name__ and __path__:ImportWarning",
+    # see https://github.com/dateutil/dateutil/issues/1314
+    "ignore:.*datetime.utcfromtimestamp\\(\\) is deprecated.*:DeprecationWarning:",
 ]
 
 [tool.mypy]

tests/conftest.py

@@ -16,12 +16,30 @@
 from jupyter_collaboration.loaders import FileLoader
 from jupyter_collaboration.rooms import DocumentRoom
 from jupyter_collaboration.stores import SQLiteYStore
+from jupyter_server.serverapp import ServerApp
 
 from .utils import FakeContentsManager, FakeEventLogger, FakeFileIDManager
 
 pytest_plugins = ["jupyter_server.pytest_plugin", "jupyter_server_fileid.pytest_plugin"]
 
 
+@pytest.fixture(autouse=True)
+def jp_server_cleanup(jp_asyncio_loop):  # noqa: PT004
+    """Automatically cleans up server resources."""
+    yield
+    if jp_asyncio_loop.is_closed():
+        return
+
+    app: ServerApp = ServerApp.instance()
+    try:
+        jp_asyncio_loop.run_until_complete(app._cleanup())
+    except (RuntimeError, SystemExit) as e:
+        print("ignoring cleanup error", e)  # noqa: T201
+    if hasattr(app, "kernel_manager"):
+        app.kernel_manager.context.destroy()
+    ServerApp.clear_instance()
+
+
 @pytest.fixture
 def jp_server_config(jp_root_dir, jp_server_config):
     return {