synapse/tests/federation/test_complexity.py
Erik Johnston 1531b214fc
Add ability to wait for replication streams (#7542)
The idea here is that if an instance persists an event via the replication HTTP API it can return before we receive that event over replication, which can lead to races where code assumes that persisting an event immediately updates various caches (e.g. current state of the room).

Most of Synapse doesn't hit such races, so we don't do the waiting automagically, instead we do so where necessary to avoid unnecessary delays. We may decide to change our minds here if it turns out there are a lot of subtle races going on.

People probably want to look at this commit by commit.
2020-05-22 14:21:54 +01:00

143 lines
4.9 KiB
Python

# -*- coding: utf-8 -*-
# Copyright 2019 Matrix.org Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from mock import Mock
from twisted.internet import defer
from synapse.api.errors import Codes, SynapseError
from synapse.rest import admin
from synapse.rest.client.v1 import login, room
from synapse.types import UserID
from tests import unittest
class RoomComplexityTests(unittest.FederatingHomeserverTestCase):
servlets = [
admin.register_servlets,
room.register_servlets,
login.register_servlets,
]
def default_config(self):
config = super().default_config()
config["limit_remote_rooms"] = {"enabled": True, "complexity": 0.05}
return config
def test_complexity_simple(self):
u1 = self.register_user("u1", "pass")
u1_token = self.login("u1", "pass")
room_1 = self.helper.create_room_as(u1, tok=u1_token)
self.helper.send_state(
room_1, event_type="m.room.topic", body={"topic": "foo"}, tok=u1_token
)
# Get the room complexity
request, channel = self.make_request(
"GET", "/_matrix/federation/unstable/rooms/%s/complexity" % (room_1,)
)
self.render(request)
self.assertEquals(200, channel.code)
complexity = channel.json_body["v1"]
self.assertTrue(complexity > 0, complexity)
# Artificially raise the complexity
store = self.hs.get_datastore()
store.get_current_state_event_counts = lambda x: defer.succeed(500 * 1.23)
# Get the room complexity again -- make sure it's our artificial value
request, channel = self.make_request(
"GET", "/_matrix/federation/unstable/rooms/%s/complexity" % (room_1,)
)
self.render(request)
self.assertEquals(200, channel.code)
complexity = channel.json_body["v1"]
self.assertEqual(complexity, 1.23)
def test_join_too_large(self):
u1 = self.register_user("u1", "pass")
handler = self.hs.get_room_member_handler()
fed_transport = self.hs.get_federation_transport_client()
# Mock out some things, because we don't want to test the whole join
fed_transport.client.get_json = Mock(return_value=defer.succeed({"v1": 9999}))
handler.federation_handler.do_invite_join = Mock(
return_value=defer.succeed(("", 1))
)
d = handler._remote_join(
None,
["other.example.com"],
"roomid",
UserID.from_string(u1),
{"membership": "join"},
)
self.pump()
# The request failed with a SynapseError saying the resource limit was
# exceeded.
f = self.get_failure(d, SynapseError)
self.assertEqual(f.value.code, 400, f.value)
self.assertEqual(f.value.errcode, Codes.RESOURCE_LIMIT_EXCEEDED)
def test_join_too_large_once_joined(self):
u1 = self.register_user("u1", "pass")
u1_token = self.login("u1", "pass")
# Ok, this might seem a bit weird -- I want to test that we actually
# leave the room, but I don't want to simulate two servers. So, we make
# a local room, which we say we're joining remotely, even if there's no
# remote, because we mock that out. Then, we'll leave the (actually
# local) room, which will be propagated over federation in a real
# scenario.
room_1 = self.helper.create_room_as(u1, tok=u1_token)
handler = self.hs.get_room_member_handler()
fed_transport = self.hs.get_federation_transport_client()
# Mock out some things, because we don't want to test the whole join
fed_transport.client.get_json = Mock(return_value=defer.succeed(None))
handler.federation_handler.do_invite_join = Mock(
return_value=defer.succeed(("", 1))
)
# Artificially raise the complexity
self.hs.get_datastore().get_current_state_event_counts = lambda x: defer.succeed(
600
)
d = handler._remote_join(
None,
["other.example.com"],
room_1,
UserID.from_string(u1),
{"membership": "join"},
)
self.pump()
# The request failed with a SynapseError saying the resource limit was
# exceeded.
f = self.get_failure(d, SynapseError)
self.assertEqual(f.value.code, 400)
self.assertEqual(f.value.errcode, Codes.RESOURCE_LIMIT_EXCEEDED)