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Add basic tests for sync/pagination with vector clock tokens. (#8488) 

These are tests for #8439
pull/8544/head
Erik Johnston 2020-10-14 13:53:20 +01:00 committed by GitHub
parent 921a3f8a59
commit 1264c8ac89
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3 changed files with 249 additions and 1 deletions
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1
changelog.d/8488.misc Normal file
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@ -0,0 +1 @@
Allow events to be sent to clients sooner when using sharded event persisters.

217
tests/replication/test_sharded_event_persister.py
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@ -14,8 +14,12 @@
# limitations under the License.
import logging
from mock import patch
from synapse.api.room_versions import RoomVersion
from synapse.rest import admin
from synapse.rest.client.v1 import login, room
from synapse.rest.client.v2_alpha import sync
from tests.replication._base import BaseMultiWorkerStreamTestCase
from tests.utils import USE_POSTGRES_FOR_TESTS
@ -36,6 +40,7 @@ class EventPersisterShardTestCase(BaseMultiWorkerStreamTestCase):
admin.register_servlets_for_client_rest_resource,
room.register_servlets,
login.register_servlets,
sync.register_servlets,
]
def prepare(self, reactor, clock, hs):
@ -43,6 +48,9 @@ class EventPersisterShardTestCase(BaseMultiWorkerStreamTestCase):
self.other_user_id = self.register_user("otheruser", "pass")
self.other_access_token = self.login("otheruser", "pass")
self.room_creator = self.hs.get_room_creation_handler()
self.store = hs.get_datastore()
def default_config(self):
conf = super().default_config()
conf["redis"] = {"enabled": "true"}
@ -53,6 +61,29 @@ class EventPersisterShardTestCase(BaseMultiWorkerStreamTestCase):
}
return conf
def _create_room(self, room_id: str, user_id: str, tok: str):
"""Create a room with given room_id
"""
# We control the room ID generation by patching out the
# `_generate_room_id` method
async def generate_room(
creator_id: str, is_public: bool, room_version: RoomVersion
):
await self.store.store_room(
room_id=room_id,
room_creator_user_id=creator_id,
is_public=is_public,
room_version=room_version,
)
return room_id
with patch(
"synapse.handlers.room.RoomCreationHandler._generate_room_id"
) as mock:
mock.side_effect = generate_room
self.helper.create_room_as(user_id, tok=tok)
def test_basic(self):
"""Simple test to ensure that multiple rooms can be created and joined,
and that different rooms get handled by different instances.
@ -100,3 +131,189 @@ class EventPersisterShardTestCase(BaseMultiWorkerStreamTestCase):
self.assertTrue(persisted_on_1)
self.assertTrue(persisted_on_2)
def test_vector_clock_token(self):
"""Tests that using a stream token with a vector clock component works
correctly with basic /sync and /messages usage.
"""
self.make_worker_hs(
"synapse.app.generic_worker", {"worker_name": "worker1"},
)
worker_hs2 = self.make_worker_hs(
"synapse.app.generic_worker", {"worker_name": "worker2"},
)
sync_hs = self.make_worker_hs(
"synapse.app.generic_worker", {"worker_name": "sync"},
)
# Specially selected room IDs that get persisted on different workers.
room_id1 = "!foo:test"
room_id2 = "!baz:test"
self.assertEqual(
self.hs.config.worker.events_shard_config.get_instance(room_id1), "worker1"
)
self.assertEqual(
self.hs.config.worker.events_shard_config.get_instance(room_id2), "worker2"
)
user_id = self.register_user("user", "pass")
access_token = self.login("user", "pass")
store = self.hs.get_datastore()
# Create two room on the different workers.
self._create_room(room_id1, user_id, access_token)
self._create_room(room_id2, user_id, access_token)
# The other user joins
self.helper.join(
room=room_id1, user=self.other_user_id, tok=self.other_access_token
)
self.helper.join(
room=room_id2, user=self.other_user_id, tok=self.other_access_token
)
# Do an initial sync so that we're up to date.
request, channel = self.make_request("GET", "/sync", access_token=access_token)
self.render_on_worker(sync_hs, request)
next_batch = channel.json_body["next_batch"]
# We now gut wrench into the events stream MultiWriterIdGenerator on
# worker2 to mimic it getting stuck persisting an event. This ensures
# that when we send an event on worker1 we end up in a state where
# worker2 events stream position lags that on worker1, resulting in a
# RoomStreamToken with a non-empty instance map component.
#
# Worker2's event stream position will not advance until we call
# __aexit__ again.
actx = worker_hs2.get_datastore()._stream_id_gen.get_next()
self.get_success(actx.__aenter__())
response = self.helper.send(room_id1, body="Hi!", tok=self.other_access_token)
first_event_in_room1 = response["event_id"]
# Assert that the current stream token has an instance map component, as
# we are trying to test vector clock tokens.
room_stream_token = store.get_room_max_token()
self.assertNotEqual(len(room_stream_token.instance_map), 0)
# Check that syncing still gets the new event, despite the gap in the
# stream IDs.
request, channel = self.make_request(
"GET", "/sync?since={}".format(next_batch), access_token=access_token
)
self.render_on_worker(sync_hs, request)
# We should only see the new event and nothing else
self.assertIn(room_id1, channel.json_body["rooms"]["join"])
self.assertNotIn(room_id2, channel.json_body["rooms"]["join"])
events = channel.json_body["rooms"]["join"][room_id1]["timeline"]["events"]
self.assertListEqual(
[first_event_in_room1], [event["event_id"] for event in events]
)
# Get the next batch and makes sure its a vector clock style token.
vector_clock_token = channel.json_body["next_batch"]
self.assertTrue(vector_clock_token.startswith("m"))
# Now that we've got a vector clock token we finish the fake persisting
# an event we started above.
self.get_success(actx.__aexit__(None, None, None))
# Now try and send an event to the other rooom so that we can test that
# the vector clock style token works as a `since` token.
response = self.helper.send(room_id2, body="Hi!", tok=self.other_access_token)
first_event_in_room2 = response["event_id"]
request, channel = self.make_request(
"GET",
"/sync?since={}".format(vector_clock_token),
access_token=access_token,
)
self.render_on_worker(sync_hs, request)
self.assertNotIn(room_id1, channel.json_body["rooms"]["join"])
self.assertIn(room_id2, channel.json_body["rooms"]["join"])
events = channel.json_body["rooms"]["join"][room_id2]["timeline"]["events"]
self.assertListEqual(
[first_event_in_room2], [event["event_id"] for event in events]
)
next_batch = channel.json_body["next_batch"]
# We also want to test that the vector clock style token works with
# pagination. We do this by sending a couple of new events into the room
# and syncing again to get a prev_batch token for each room, then
# paginating from there back to the vector clock token.
self.helper.send(room_id1, body="Hi again!", tok=self.other_access_token)
self.helper.send(room_id2, body="Hi again!", tok=self.other_access_token)
request, channel = self.make_request(
"GET", "/sync?since={}".format(next_batch), access_token=access_token
)
self.render_on_worker(sync_hs, request)
prev_batch1 = channel.json_body["rooms"]["join"][room_id1]["timeline"][
"prev_batch"
]
prev_batch2 = channel.json_body["rooms"]["join"][room_id2]["timeline"][
"prev_batch"
]
# Paginating back in the first room should not produce any results, as
# no events have happened in it. This tests that we are correctly
# filtering results based on the vector clock portion.
request, channel = self.make_request(
"GET",
"/rooms/{}/messages?from={}&to={}&dir=b".format(
room_id1, prev_batch1, vector_clock_token
),
access_token=access_token,
)
self.render_on_worker(sync_hs, request)
self.assertListEqual([], channel.json_body["chunk"])
# Paginating back on the second room should produce the first event
# again. This tests that pagination isn't completely broken.
request, channel = self.make_request(
"GET",
"/rooms/{}/messages?from={}&to={}&dir=b".format(
room_id2, prev_batch2, vector_clock_token
),
access_token=access_token,
)
self.render_on_worker(sync_hs, request)
self.assertEqual(len(channel.json_body["chunk"]), 1)
self.assertEqual(
channel.json_body["chunk"][0]["event_id"], first_event_in_room2
)
# Paginating forwards should give the same results
request, channel = self.make_request(
"GET",
"/rooms/{}/messages?from={}&to={}&dir=f".format(
room_id1, vector_clock_token, prev_batch1
),
access_token=access_token,
)
self.render_on_worker(sync_hs, request)
self.assertListEqual([], channel.json_body["chunk"])
request, channel = self.make_request(
"GET",
"/rooms/{}/messages?from={}&to={}&dir=f".format(
room_id2, vector_clock_token, prev_batch2,
),
access_token=access_token,
)
self.render_on_worker(sync_hs, request)
self.assertEqual(len(channel.json_body["chunk"]), 1)
self.assertEqual(
channel.json_body["chunk"][0]["event_id"], first_event_in_room2
)

32
tests/unittest.py
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@ -20,7 +20,7 @@ import hmac
import inspect
import logging
import time
from typing import Optional, Tuple, Type, TypeVar, Union
from typing import Optional, Tuple, Type, TypeVar, Union, overload
from mock import Mock, patch
@ -364,6 +364,36 @@ class HomeserverTestCase(TestCase):
Function to optionally be overridden in subclasses.
"""
# Annoyingly mypy doesn't seem to pick up the fact that T is SynapseRequest
# when the `request` arg isn't given, so we define an explicit override to
# cover that case.
@overload
def make_request(
self,
method: Union[bytes, str],
path: Union[bytes, str],
content: Union[bytes, dict] = b"",
access_token: Optional[str] = None,
shorthand: bool = True,
federation_auth_origin: str = None,
content_is_form: bool = False,
) -> Tuple[SynapseRequest, FakeChannel]:
...
@overload
def make_request(
self,
method: Union[bytes, str],
path: Union[bytes, str],
content: Union[bytes, dict] = b"",
access_token: Optional[str] = None,
request: Type[T] = SynapseRequest,
shorthand: bool = True,
federation_auth_origin: str = None,
content_is_form: bool = False,
) -> Tuple[T, FakeChannel]:
...
def make_request(
self,
method: Union[bytes, str],