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Test that state events sent by modules correctly end up in the room's state (#10835)
Test for #10830 Ideally the test would also make sure the new state event comes down sync, but this is probably good enough.
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changelog.d/10835.misc
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changelog.d/10835.misc
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Add a test to ensure state events sent by modules get persisted correctly.
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@ -15,6 +15,7 @@ import threading
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from typing import Dict
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from unittest.mock import Mock
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from synapse.api.constants import EventTypes
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from synapse.events import EventBase
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from synapse.events.third_party_rules import load_legacy_third_party_event_rules
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from synapse.module_api import ModuleApi
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@ -327,3 +328,86 @@ class ThirdPartyRulesTestCase(unittest.HomeserverTestCase):
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correctly.
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"""
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self.helper.create_room_as(self.user_id, tok=self.tok, expect_code=403)
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def test_sent_event_end_up_in_room_state(self):
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"""Tests that a state event sent by a module while processing another state event
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doesn't get dropped from the state of the room. This is to guard against a bug
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where Synapse has been observed doing so, see https://github.com/matrix-org/synapse/issues/10830
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"""
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event_type = "org.matrix.test_state"
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# This content will be updated later on, and since we actually use a reference on
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# the dict it does the right thing. It's a bit hacky but a handy way of making
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# sure the state actually gets updated.
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event_content = {"i": -1}
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api = self.hs.get_module_api()
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# Define a callback that sends a custom event on power levels update.
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async def test_fn(event: EventBase, state_events):
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if event.is_state and event.type == EventTypes.PowerLevels:
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await api.create_and_send_event_into_room(
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{
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"room_id": event.room_id,
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"sender": event.sender,
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"type": event_type,
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"content": event_content,
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"state_key": "",
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}
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)
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return True, None
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self.hs.get_third_party_event_rules()._check_event_allowed_callbacks = [test_fn]
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# Sometimes the bug might not happen the first time the event type is added
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# to the state but might happen when an event updates the state of the room for
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# that type, so we test updating the state several times.
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for i in range(5):
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# Update the content of the custom state event to be sent by the callback.
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event_content["i"] = i
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# Update the room's power levels with a different value each time so Synapse
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# doesn't consider an update redundant.
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self._update_power_levels(event_default=i)
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# Check that the new event made it to the room's state.
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channel = self.make_request(
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method="GET",
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path="/rooms/" + self.room_id + "/state/" + event_type,
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access_token=self.tok,
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)
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self.assertEqual(channel.code, 200)
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self.assertEqual(channel.json_body["i"], i)
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def _update_power_levels(self, event_default: int = 0):
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"""Updates the room's power levels.
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Args:
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event_default: Value to use for 'events_default'.
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"""
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self.helper.send_state(
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room_id=self.room_id,
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event_type=EventTypes.PowerLevels,
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body={
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"ban": 50,
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"events": {
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"m.room.avatar": 50,
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"m.room.canonical_alias": 50,
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"m.room.encryption": 100,
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"m.room.history_visibility": 100,
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"m.room.name": 50,
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"m.room.power_levels": 100,
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"m.room.server_acl": 100,
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"m.room.tombstone": 100,
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},
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"events_default": event_default,
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"invite": 0,
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"kick": 50,
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"redact": 50,
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"state_default": 50,
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"users": {self.user_id: 100},
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"users_default": 0,
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},
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tok=self.tok,
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)
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