Bugbear: Add Mutable Parameter fixes (#9682)

Part of #9366

Adds in fixes for B006 and B008, both relating to mutable parameter lint errors.

Signed-off-by: Jonathan de Jong <jonathan@automatia.nl>

1 files changed, 10 insertions, 6 deletions

diff --git a/tests/replication/slave/storage/test_events.py b/tests/replication/slave/storage/test_events.py
index 0ceb0f935c..333374b183 100644
--- a/tests/replication/slave/storage/test_events.py
+++ b/tests/replication/slave/storage/test_events.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import logging
+from typing import Iterable, Optional
 
 from canonicaljson import encode_canonical_json
 
@@ -332,15 +333,18 @@ class SlavedEventStoreTestCase(BaseSlavedStoreTestCase):
         room_id=ROOM_ID,
         type="m.room.message",
         key=None,
-        internal={},
+        internal: Optional[dict] = None,
         depth=None,
-        prev_events=[],
-        auth_events=[],
-        prev_state=[],
+        prev_events: Optional[list] = None,
+        auth_events: Optional[list] = None,
+        prev_state: Optional[list] = None,
         redacts=None,
-        push_actions=[],
+        push_actions: Iterable = frozenset(),
         **content
     ):
+        prev_events = prev_events or []
+        auth_events = auth_events or []
+        prev_state = prev_state or []
 
         if depth is None:
             depth = self.event_id
@@ -369,7 +373,7 @@ class SlavedEventStoreTestCase(BaseSlavedStoreTestCase):
         if redacts is not None:
             event_dict["redacts"] = redacts
 
-        event = make_event_from_dict(event_dict, internal_metadata_dict=internal)
+        event = make_event_from_dict(event_dict, internal_metadata_dict=internal or {})
 
         self.event_id += 1
         state_handler = self.hs.get_state_handler()