Fix `PushRuleEvaluator` and `Filter` to work on frozendicts (#12100)

* Fix `PushRuleEvaluator` to work on frozendicts

frozendicts do not (necessarily) inherit from dict, so this needs to handle
them correctly.

* Fix event filtering for frozen events

Looks like this one was introduced by #11194.

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/api/test_filtering.py b/tests/api/test_filtering.py

index 2525018e95..8c3354ce3c 100644
--- a/tests/api/test_filtering.py
+++ b/tests/api/test_filtering.py
@@ -18,6 +18,7 @@
 from unittest.mock import patch
 
 import jsonschema
+from frozendict import frozendict
 
 from synapse.api.constants import EventContentFields
 from synapse.api.errors import SynapseError
@@ -327,6 +328,15 @@ class FilteringTestCase(unittest.HomeserverTestCase):
 
         self.assertFalse(Filter(self.hs, definition)._check(event))
 
+        # check it works with frozendicts too
+        event = MockEvent(
+            sender="@foo:bar",
+            type="m.room.message",
+            room_id="!secretbase:unknown",
+            content=frozendict({EventContentFields.LABELS: ["#fun"]}),
+        )
+        self.assertTrue(Filter(self.hs, definition)._check(event))
+
     def test_filter_not_labels(self):
         definition = {"org.matrix.not_labels": ["#fun"]}
         event = MockEvent(