diff --git a/tests/storage/test_state.py b/tests/storage/test_state.py
new file mode 100644
index 0000000000..7a76d67b8c
--- /dev/null
+++ b/tests/storage/test_state.py
@@ -0,0 +1,319 @@
+# -*- coding: utf-8 -*-
+# Copyright 2018 New Vector Ltd
+#
+# 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.
+
+import logging
+
+from twisted.internet import defer
+
+from synapse.api.constants import EventTypes, Membership
+from synapse.types import RoomID, UserID
+
+import tests.unittest
+import tests.utils
+
+logger = logging.getLogger(__name__)
+
+
+class StateStoreTestCase(tests.unittest.TestCase):
+ def __init__(self, *args, **kwargs):
+ super(StateStoreTestCase, self).__init__(*args, **kwargs)
+ self.store = None # type: synapse.storage.DataStore
+
+ @defer.inlineCallbacks
+ def setUp(self):
+ hs = yield tests.utils.setup_test_homeserver()
+
+ self.store = hs.get_datastore()
+ self.event_builder_factory = hs.get_event_builder_factory()
+ self.event_creation_handler = hs.get_event_creation_handler()
+
+ self.u_alice = UserID.from_string("@alice:test")
+ self.u_bob = UserID.from_string("@bob:test")
+
+ self.room = RoomID.from_string("!abc123:test")
+
+ yield self.store.store_room(
+ self.room.to_string(),
+ room_creator_user_id="@creator:text",
+ is_public=True
+ )
+
+ @defer.inlineCallbacks
+ def inject_state_event(self, room, sender, typ, state_key, content):
+ builder = self.event_builder_factory.new({
+ "type": typ,
+ "sender": sender.to_string(),
+ "state_key": state_key,
+ "room_id": room.to_string(),
+ "content": content,
+ })
+
+ event, context = yield self.event_creation_handler.create_new_client_event(
+ builder
+ )
+
+ yield self.store.persist_event(event, context)
+
+ defer.returnValue(event)
+
+ def assertStateMapEqual(self, s1, s2):
+ for t in s1:
+ # just compare event IDs for simplicity
+ self.assertEqual(s1[t].event_id, s2[t].event_id)
+ self.assertEqual(len(s1), len(s2))
+
+ @defer.inlineCallbacks
+ def test_get_state_for_event(self):
+
+ # this defaults to a linear DAG as each new injection defaults to whatever
+ # forward extremities are currently in the DB for this room.
+ e1 = yield self.inject_state_event(
+ self.room, self.u_alice, EventTypes.Create, '', {},
+ )
+ e2 = yield self.inject_state_event(
+ self.room, self.u_alice, EventTypes.Name, '', {
+ "name": "test room"
+ },
+ )
+ e3 = yield self.inject_state_event(
+ self.room, self.u_alice, EventTypes.Member, self.u_alice.to_string(), {
+ "membership": Membership.JOIN
+ },
+ )
+ e4 = yield self.inject_state_event(
+ self.room, self.u_bob, EventTypes.Member, self.u_bob.to_string(), {
+ "membership": Membership.JOIN
+ },
+ )
+ e5 = yield self.inject_state_event(
+ self.room, self.u_bob, EventTypes.Member, self.u_bob.to_string(), {
+ "membership": Membership.LEAVE
+ },
+ )
+
+ # check we get the full state as of the final event
+ state = yield self.store.get_state_for_event(
+ e5.event_id, None, filtered_types=None
+ )
+
+ self.assertIsNotNone(e4)
+
+ self.assertStateMapEqual({
+ (e1.type, e1.state_key): e1,
+ (e2.type, e2.state_key): e2,
+ (e3.type, e3.state_key): e3,
+ # e4 is overwritten by e5
+ (e5.type, e5.state_key): e5,
+ }, state)
+
+ # check we can filter to the m.room.name event (with a '' state key)
+ state = yield self.store.get_state_for_event(
+ e5.event_id, [(EventTypes.Name, '')], filtered_types=None
+ )
+
+ self.assertStateMapEqual({
+ (e2.type, e2.state_key): e2,
+ }, state)
+
+ # check we can filter to the m.room.name event (with a wildcard None state key)
+ state = yield self.store.get_state_for_event(
+ e5.event_id, [(EventTypes.Name, None)], filtered_types=None
+ )
+
+ self.assertStateMapEqual({
+ (e2.type, e2.state_key): e2,
+ }, state)
+
+ # check we can grab the m.room.member events (with a wildcard None state key)
+ state = yield self.store.get_state_for_event(
+ e5.event_id, [(EventTypes.Member, None)], filtered_types=None
+ )
+
+ self.assertStateMapEqual({
+ (e3.type, e3.state_key): e3,
+ (e5.type, e5.state_key): e5,
+ }, state)
+
+ # check we can use filter_types to grab a specific room member
+ # without filtering out the other event types
+ state = yield self.store.get_state_for_event(
+ e5.event_id, [(EventTypes.Member, self.u_alice.to_string())],
+ filtered_types=[EventTypes.Member],
+ )
+
+ self.assertStateMapEqual({
+ (e1.type, e1.state_key): e1,
+ (e2.type, e2.state_key): e2,
+ (e3.type, e3.state_key): e3,
+ }, state)
+
+ # check that types=[], filtered_types=[EventTypes.Member]
+ # doesn't return all members
+ state = yield self.store.get_state_for_event(
+ e5.event_id, [], filtered_types=[EventTypes.Member],
+ )
+
+ self.assertStateMapEqual({
+ (e1.type, e1.state_key): e1,
+ (e2.type, e2.state_key): e2,
+ }, state)
+
+ #######################################################
+ # _get_some_state_from_cache tests against a full cache
+ #######################################################
+
+ room_id = self.room.to_string()
+ group_ids = yield self.store.get_state_groups_ids(room_id, [e5.event_id])
+ group = group_ids.keys()[0]
+
+ # test _get_some_state_from_cache correctly filters out members with types=[]
+ (state_dict, is_all) = yield self.store._get_some_state_from_cache(
+ group, [], filtered_types=[EventTypes.Member]
+ )
+
+ self.assertEqual(is_all, True)
+ self.assertDictEqual({
+ (e1.type, e1.state_key): e1.event_id,
+ (e2.type, e2.state_key): e2.event_id,
+ }, state_dict)
+
+ # test _get_some_state_from_cache correctly filters in members with wildcard types
+ (state_dict, is_all) = yield self.store._get_some_state_from_cache(
+ group, [(EventTypes.Member, None)], filtered_types=[EventTypes.Member]
+ )
+
+ self.assertEqual(is_all, True)
+ self.assertDictEqual({
+ (e1.type, e1.state_key): e1.event_id,
+ (e2.type, e2.state_key): e2.event_id,
+ (e3.type, e3.state_key): e3.event_id,
+ # e4 is overwritten by e5
+ (e5.type, e5.state_key): e5.event_id,
+ }, state_dict)
+
+ # test _get_some_state_from_cache correctly filters in members with specific types
+ (state_dict, is_all) = yield self.store._get_some_state_from_cache(
+ group, [(EventTypes.Member, e5.state_key)], filtered_types=[EventTypes.Member]
+ )
+
+ self.assertEqual(is_all, True)
+ self.assertDictEqual({
+ (e1.type, e1.state_key): e1.event_id,
+ (e2.type, e2.state_key): e2.event_id,
+ (e5.type, e5.state_key): e5.event_id,
+ }, state_dict)
+
+ # test _get_some_state_from_cache correctly filters in members with specific types
+ # and no filtered_types
+ (state_dict, is_all) = yield self.store._get_some_state_from_cache(
+ group, [(EventTypes.Member, e5.state_key)], filtered_types=None
+ )
+
+ self.assertEqual(is_all, True)
+ self.assertDictEqual({
+ (e5.type, e5.state_key): e5.event_id,
+ }, state_dict)
+
+ #######################################################
+ # deliberately remove e2 (room name) from the _state_group_cache
+
+ (is_all, known_absent, state_dict_ids) = self.store._state_group_cache.get(group)
+
+ self.assertEqual(is_all, True)
+ self.assertEqual(known_absent, set())
+ self.assertDictEqual(state_dict_ids, {
+ (e1.type, e1.state_key): e1.event_id,
+ (e2.type, e2.state_key): e2.event_id,
+ (e3.type, e3.state_key): e3.event_id,
+ # e4 is overwritten by e5
+ (e5.type, e5.state_key): e5.event_id,
+ })
+
+ state_dict_ids.pop((e2.type, e2.state_key))
+ self.store._state_group_cache.invalidate(group)
+ self.store._state_group_cache.update(
+ sequence=self.store._state_group_cache.sequence,
+ key=group,
+ value=state_dict_ids,
+ # list fetched keys so it knows it's partial
+ fetched_keys=(
+ (e1.type, e1.state_key),
+ (e3.type, e3.state_key),
+ (e5.type, e5.state_key),
+ )
+ )
+
+ (is_all, known_absent, state_dict_ids) = self.store._state_group_cache.get(group)
+
+ self.assertEqual(is_all, False)
+ self.assertEqual(known_absent, set([
+ (e1.type, e1.state_key),
+ (e3.type, e3.state_key),
+ (e5.type, e5.state_key),
+ ]))
+ self.assertDictEqual(state_dict_ids, {
+ (e1.type, e1.state_key): e1.event_id,
+ (e3.type, e3.state_key): e3.event_id,
+ (e5.type, e5.state_key): e5.event_id,
+ })
+
+ ############################################
+ # test that things work with a partial cache
+
+ # test _get_some_state_from_cache correctly filters out members with types=[]
+ room_id = self.room.to_string()
+ (state_dict, is_all) = yield self.store._get_some_state_from_cache(
+ group, [], filtered_types=[EventTypes.Member]
+ )
+
+ self.assertEqual(is_all, False)
+ self.assertDictEqual({
+ (e1.type, e1.state_key): e1.event_id,
+ }, state_dict)
+
+ # test _get_some_state_from_cache correctly filters in members wildcard types
+ (state_dict, is_all) = yield self.store._get_some_state_from_cache(
+ group, [(EventTypes.Member, None)], filtered_types=[EventTypes.Member]
+ )
+
+ self.assertEqual(is_all, False)
+ self.assertDictEqual({
+ (e1.type, e1.state_key): e1.event_id,
+ (e3.type, e3.state_key): e3.event_id,
+ # e4 is overwritten by e5
+ (e5.type, e5.state_key): e5.event_id,
+ }, state_dict)
+
+ # test _get_some_state_from_cache correctly filters in members with specific types
+ (state_dict, is_all) = yield self.store._get_some_state_from_cache(
+ group, [(EventTypes.Member, e5.state_key)], filtered_types=[EventTypes.Member]
+ )
+
+ self.assertEqual(is_all, False)
+ self.assertDictEqual({
+ (e1.type, e1.state_key): e1.event_id,
+ (e5.type, e5.state_key): e5.event_id,
+ }, state_dict)
+
+ # test _get_some_state_from_cache correctly filters in members with specific types
+ # and no filtered_types
+ (state_dict, is_all) = yield self.store._get_some_state_from_cache(
+ group, [(EventTypes.Member, e5.state_key)], filtered_types=None
+ )
+
+ self.assertEqual(is_all, True)
+ self.assertDictEqual({
+ (e5.type, e5.state_key): e5.event_id,
+ }, state_dict)
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