diff --git a/tests/events/test_utils.py b/tests/events/test_utils.py
index cf81bcf52c..d5ac66a6ed 100644
--- a/tests/events/test_utils.py
+++ b/tests/events/test_utils.py
@@ -32,6 +32,7 @@ from synapse.events.utils import (
PowerLevelsContent,
SerializeEventConfig,
_split_field,
+ clone_event,
copy_and_fixup_power_levels_contents,
maybe_upsert_event_field,
prune_event,
@@ -611,6 +612,29 @@ class PruneEventTestCase(stdlib_unittest.TestCase):
)
+class CloneEventTestCase(stdlib_unittest.TestCase):
+ def test_unsigned_is_copied(self) -> None:
+ original = make_event_from_dict(
+ {
+ "type": "A",
+ "event_id": "$test:domain",
+ "unsigned": {"a": 1, "b": 2},
+ },
+ RoomVersions.V1,
+ {"txn_id": "txn"},
+ )
+ original.internal_metadata.stream_ordering = 1234
+ self.assertEqual(original.internal_metadata.stream_ordering, 1234)
+
+ cloned = clone_event(original)
+ cloned.unsigned["b"] = 3
+
+ self.assertEqual(original.unsigned, {"a": 1, "b": 2})
+ self.assertEqual(cloned.unsigned, {"a": 1, "b": 3})
+ self.assertEqual(cloned.internal_metadata.stream_ordering, 1234)
+ self.assertEqual(cloned.internal_metadata.txn_id, "txn")
+
+
class SerializeEventTestCase(stdlib_unittest.TestCase):
def serialize(self, ev: EventBase, fields: Optional[List[str]]) -> JsonDict:
return serialize_event(
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