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-rw-r--r--tests/storage/test_roommember.py403
1 files changed, 401 insertions, 2 deletions
diff --git a/tests/storage/test_roommember.py b/tests/storage/test_roommember.py
index dd475f54fa..e2f19e25e3 100644
--- a/tests/storage/test_roommember.py
+++ b/tests/storage/test_roommember.py
@@ -19,20 +19,28 @@
 # [This file includes modifications made by New Vector Limited]
 #
 #
+import logging
 from typing import List, Optional, Tuple, cast
 
 from twisted.test.proto_helpers import MemoryReactor
 
-from synapse.api.constants import Membership
+from synapse.api.constants import EventTypes, JoinRules, Membership
+from synapse.api.room_versions import RoomVersions
+from synapse.rest import admin
 from synapse.rest.admin import register_servlets_for_client_rest_resource
-from synapse.rest.client import login, room
+from synapse.rest.client import knock, login, room
 from synapse.server import HomeServer
+from synapse.storage.databases.main.roommember import extract_heroes_from_room_summary
+from synapse.storage.roommember import MemberSummary
 from synapse.types import UserID, create_requester
 from synapse.util import Clock
 
 from tests import unittest
 from tests.server import TestHomeServer
 from tests.test_utils import event_injection
+from tests.unittest import skip_unless
+
+logger = logging.getLogger(__name__)
 
 
 class RoomMemberStoreTestCase(unittest.HomeserverTestCase):
@@ -240,6 +248,397 @@ class RoomMemberStoreTestCase(unittest.HomeserverTestCase):
         )
 
 
+class RoomSummaryTestCase(unittest.HomeserverTestCase):
+    """
+    Test `/sync` room summary related logic like `get_room_summary(...)` and
+    `extract_heroes_from_room_summary(...)`
+    """
+
+    servlets = [
+        admin.register_servlets,
+        knock.register_servlets,
+        login.register_servlets,
+        room.register_servlets,
+    ]
+
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        self.sliding_sync_handler = self.hs.get_sliding_sync_handler()
+        self.store = self.hs.get_datastores().main
+
+    def _assert_member_summary(
+        self,
+        actual_member_summary: MemberSummary,
+        expected_member_list: List[str],
+        *,
+        expected_member_count: Optional[int] = None,
+    ) -> None:
+        """
+        Assert that the `MemberSummary` object has the expected members.
+        """
+        self.assertListEqual(
+            [
+                user_id
+                for user_id, _membership_event_id in actual_member_summary.members
+            ],
+            expected_member_list,
+        )
+        self.assertEqual(
+            actual_member_summary.count,
+            (
+                expected_member_count
+                if expected_member_count is not None
+                else len(expected_member_list)
+            ),
+        )
+
+    def test_get_room_summary_membership(self) -> None:
+        """
+        Test that `get_room_summary(...)` gets every kind of membership when there
+        aren't that many members in the room.
+        """
+        user1_id = self.register_user("user1", "pass")
+        user1_tok = self.login(user1_id, "pass")
+        user2_id = self.register_user("user2", "pass")
+        user2_tok = self.login(user2_id, "pass")
+        user3_id = self.register_user("user3", "pass")
+        _user3_tok = self.login(user3_id, "pass")
+        user4_id = self.register_user("user4", "pass")
+        user4_tok = self.login(user4_id, "pass")
+        user5_id = self.register_user("user5", "pass")
+        user5_tok = self.login(user5_id, "pass")
+
+        # Setup a room (user1 is the creator and is joined to the room)
+        room_id = self.helper.create_room_as(user1_id, tok=user1_tok)
+
+        # User2 is banned
+        self.helper.join(room_id, user2_id, tok=user2_tok)
+        self.helper.ban(room_id, src=user1_id, targ=user2_id, tok=user1_tok)
+
+        # User3 is invited by user1
+        self.helper.invite(room_id, targ=user3_id, tok=user1_tok)
+
+        # User4 leaves
+        self.helper.join(room_id, user4_id, tok=user4_tok)
+        self.helper.leave(room_id, user4_id, tok=user4_tok)
+
+        # User5 joins
+        self.helper.join(room_id, user5_id, tok=user5_tok)
+
+        room_membership_summary = self.get_success(self.store.get_room_summary(room_id))
+        empty_ms = MemberSummary([], 0)
+
+        self._assert_member_summary(
+            room_membership_summary.get(Membership.JOIN, empty_ms),
+            [user1_id, user5_id],
+        )
+        self._assert_member_summary(
+            room_membership_summary.get(Membership.INVITE, empty_ms), [user3_id]
+        )
+        self._assert_member_summary(
+            room_membership_summary.get(Membership.LEAVE, empty_ms), [user4_id]
+        )
+        self._assert_member_summary(
+            room_membership_summary.get(Membership.BAN, empty_ms), [user2_id]
+        )
+        self._assert_member_summary(
+            room_membership_summary.get(Membership.KNOCK, empty_ms),
+            [
+                # No one knocked
+            ],
+        )
+
+    def test_get_room_summary_membership_order(self) -> None:
+        """
+        Test that `get_room_summary(...)` stacks our limit of 6 in this order: joins ->
+        invites -> leave -> everything else (bans/knocks)
+        """
+        user1_id = self.register_user("user1", "pass")
+        user1_tok = self.login(user1_id, "pass")
+        user2_id = self.register_user("user2", "pass")
+        user2_tok = self.login(user2_id, "pass")
+        user3_id = self.register_user("user3", "pass")
+        _user3_tok = self.login(user3_id, "pass")
+        user4_id = self.register_user("user4", "pass")
+        user4_tok = self.login(user4_id, "pass")
+        user5_id = self.register_user("user5", "pass")
+        user5_tok = self.login(user5_id, "pass")
+        user6_id = self.register_user("user6", "pass")
+        user6_tok = self.login(user6_id, "pass")
+        user7_id = self.register_user("user7", "pass")
+        user7_tok = self.login(user7_id, "pass")
+
+        # Setup the room (user1 is the creator and is joined to the room)
+        room_id = self.helper.create_room_as(user1_id, tok=user1_tok)
+
+        # We expect the order to be joins -> invites -> leave -> bans so setup the users
+        # *NOT* in that same order to make sure we're actually sorting them.
+
+        # User2 is banned
+        self.helper.join(room_id, user2_id, tok=user2_tok)
+        self.helper.ban(room_id, src=user1_id, targ=user2_id, tok=user1_tok)
+
+        # User3 is invited by user1
+        self.helper.invite(room_id, targ=user3_id, tok=user1_tok)
+
+        # User4 leaves
+        self.helper.join(room_id, user4_id, tok=user4_tok)
+        self.helper.leave(room_id, user4_id, tok=user4_tok)
+
+        # User5, User6, User7 joins
+        self.helper.join(room_id, user5_id, tok=user5_tok)
+        self.helper.join(room_id, user6_id, tok=user6_tok)
+        self.helper.join(room_id, user7_id, tok=user7_tok)
+
+        room_membership_summary = self.get_success(self.store.get_room_summary(room_id))
+        empty_ms = MemberSummary([], 0)
+
+        self._assert_member_summary(
+            room_membership_summary.get(Membership.JOIN, empty_ms),
+            [user1_id, user5_id, user6_id, user7_id],
+        )
+        self._assert_member_summary(
+            room_membership_summary.get(Membership.INVITE, empty_ms), [user3_id]
+        )
+        self._assert_member_summary(
+            room_membership_summary.get(Membership.LEAVE, empty_ms), [user4_id]
+        )
+        self._assert_member_summary(
+            room_membership_summary.get(Membership.BAN, empty_ms),
+            [
+                # The banned user is not in the summary because the summary can only fit
+                # 6 members and prefers everything else before bans
+                #
+                # user2_id
+            ],
+            # But we still see the count of banned users
+            expected_member_count=1,
+        )
+        self._assert_member_summary(
+            room_membership_summary.get(Membership.KNOCK, empty_ms),
+            [
+                # No one knocked
+            ],
+        )
+
+    def test_extract_heroes_from_room_summary_excludes_self(self) -> None:
+        """
+        Test that `extract_heroes_from_room_summary(...)` does not include the user
+        itself.
+        """
+        user1_id = self.register_user("user1", "pass")
+        user1_tok = self.login(user1_id, "pass")
+        user2_id = self.register_user("user2", "pass")
+        user2_tok = self.login(user2_id, "pass")
+
+        # Setup the room (user1 is the creator and is joined to the room)
+        room_id = self.helper.create_room_as(user1_id, tok=user1_tok)
+
+        # User2 joins
+        self.helper.join(room_id, user2_id, tok=user2_tok)
+
+        room_membership_summary = self.get_success(self.store.get_room_summary(room_id))
+
+        # We first ask from the perspective of a random fake user
+        hero_user_ids = extract_heroes_from_room_summary(
+            room_membership_summary, me="@fakeuser"
+        )
+
+        # Make sure user1 is in the room (ensure our test setup is correct)
+        self.assertListEqual(hero_user_ids, [user1_id, user2_id])
+
+        # Now, we ask for the room summary from the perspective of user1
+        hero_user_ids = extract_heroes_from_room_summary(
+            room_membership_summary, me=user1_id
+        )
+
+        # User1 should not be included in the list of heroes because they are the one
+        # asking
+        self.assertListEqual(hero_user_ids, [user2_id])
+
+    def test_extract_heroes_from_room_summary_first_five_joins(self) -> None:
+        """
+        Test that `extract_heroes_from_room_summary(...)` returns the first 5 joins.
+        """
+        user1_id = self.register_user("user1", "pass")
+        user1_tok = self.login(user1_id, "pass")
+        user2_id = self.register_user("user2", "pass")
+        user2_tok = self.login(user2_id, "pass")
+        user3_id = self.register_user("user3", "pass")
+        user3_tok = self.login(user3_id, "pass")
+        user4_id = self.register_user("user4", "pass")
+        user4_tok = self.login(user4_id, "pass")
+        user5_id = self.register_user("user5", "pass")
+        user5_tok = self.login(user5_id, "pass")
+        user6_id = self.register_user("user6", "pass")
+        user6_tok = self.login(user6_id, "pass")
+        user7_id = self.register_user("user7", "pass")
+        user7_tok = self.login(user7_id, "pass")
+
+        # Setup the room (user1 is the creator and is joined to the room)
+        room_id = self.helper.create_room_as(user1_id, tok=user1_tok)
+
+        # User2 -> User7 joins
+        self.helper.join(room_id, user2_id, tok=user2_tok)
+        self.helper.join(room_id, user3_id, tok=user3_tok)
+        self.helper.join(room_id, user4_id, tok=user4_tok)
+        self.helper.join(room_id, user5_id, tok=user5_tok)
+        self.helper.join(room_id, user6_id, tok=user6_tok)
+        self.helper.join(room_id, user7_id, tok=user7_tok)
+
+        room_membership_summary = self.get_success(self.store.get_room_summary(room_id))
+
+        hero_user_ids = extract_heroes_from_room_summary(
+            room_membership_summary, me="@fakuser"
+        )
+
+        # First 5 users to join the room
+        self.assertListEqual(
+            hero_user_ids, [user1_id, user2_id, user3_id, user4_id, user5_id]
+        )
+
+    def test_extract_heroes_from_room_summary_membership_order(self) -> None:
+        """
+        Test that `extract_heroes_from_room_summary(...)` prefers joins/invites over
+        everything else.
+        """
+        user1_id = self.register_user("user1", "pass")
+        user1_tok = self.login(user1_id, "pass")
+        user2_id = self.register_user("user2", "pass")
+        user2_tok = self.login(user2_id, "pass")
+        user3_id = self.register_user("user3", "pass")
+        _user3_tok = self.login(user3_id, "pass")
+        user4_id = self.register_user("user4", "pass")
+        user4_tok = self.login(user4_id, "pass")
+        user5_id = self.register_user("user5", "pass")
+        user5_tok = self.login(user5_id, "pass")
+
+        # Setup the room (user1 is the creator and is joined to the room)
+        room_id = self.helper.create_room_as(user1_id, tok=user1_tok)
+
+        # We expect the order to be joins -> invites -> leave -> bans so setup the users
+        # *NOT* in that same order to make sure we're actually sorting them.
+
+        # User2 is banned
+        self.helper.join(room_id, user2_id, tok=user2_tok)
+        self.helper.ban(room_id, src=user1_id, targ=user2_id, tok=user1_tok)
+
+        # User3 is invited by user1
+        self.helper.invite(room_id, targ=user3_id, tok=user1_tok)
+
+        # User4 leaves
+        self.helper.join(room_id, user4_id, tok=user4_tok)
+        self.helper.leave(room_id, user4_id, tok=user4_tok)
+
+        # User5 joins
+        self.helper.join(room_id, user5_id, tok=user5_tok)
+
+        room_membership_summary = self.get_success(self.store.get_room_summary(room_id))
+
+        hero_user_ids = extract_heroes_from_room_summary(
+            room_membership_summary, me="@fakeuser"
+        )
+
+        # Prefer joins -> invites, over everything else
+        self.assertListEqual(
+            hero_user_ids,
+            [
+                # The joins
+                user1_id,
+                user5_id,
+                # The invites
+                user3_id,
+            ],
+        )
+
+    @skip_unless(
+        False,
+        "Test is not possible because when everyone leaves the room, "
+        + "the server is `no_longer_in_room` and we don't have any `current_state_events` to query",
+    )
+    def test_extract_heroes_from_room_summary_fallback_leave_ban(self) -> None:
+        """
+        Test that `extract_heroes_from_room_summary(...)` falls back to leave/ban if
+        there aren't any joins/invites.
+        """
+        user1_id = self.register_user("user1", "pass")
+        user1_tok = self.login(user1_id, "pass")
+        user2_id = self.register_user("user2", "pass")
+        user2_tok = self.login(user2_id, "pass")
+        user3_id = self.register_user("user3", "pass")
+        user3_tok = self.login(user3_id, "pass")
+
+        # Setup the room (user1 is the creator and is joined to the room)
+        room_id = self.helper.create_room_as(user1_id, tok=user1_tok)
+
+        # User2 is banned
+        self.helper.join(room_id, user2_id, tok=user2_tok)
+        self.helper.ban(room_id, src=user1_id, targ=user2_id, tok=user1_tok)
+
+        # User3 leaves
+        self.helper.join(room_id, user3_id, tok=user3_tok)
+        self.helper.leave(room_id, user3_id, tok=user3_tok)
+
+        # User1 leaves (we're doing this last because they're the room creator)
+        self.helper.leave(room_id, user1_id, tok=user1_tok)
+
+        room_membership_summary = self.get_success(self.store.get_room_summary(room_id))
+
+        hero_user_ids = extract_heroes_from_room_summary(
+            room_membership_summary, me="@fakeuser"
+        )
+
+        # Fallback to people who left -> banned
+        self.assertListEqual(
+            hero_user_ids,
+            [user3_id, user1_id, user3_id],
+        )
+
+    def test_extract_heroes_from_room_summary_excludes_knocks(self) -> None:
+        """
+        People who knock on the room have (potentially) never been in the room before
+        and are total outsiders. Plus the spec doesn't mention them at all for heroes.
+        """
+        user1_id = self.register_user("user1", "pass")
+        user1_tok = self.login(user1_id, "pass")
+        user2_id = self.register_user("user2", "pass")
+        user2_tok = self.login(user2_id, "pass")
+
+        # Setup the knock room (user1 is the creator and is joined to the room)
+        knock_room_id = self.helper.create_room_as(
+            user1_id, tok=user1_tok, room_version=RoomVersions.V7.identifier
+        )
+        self.helper.send_state(
+            knock_room_id,
+            EventTypes.JoinRules,
+            {"join_rule": JoinRules.KNOCK},
+            tok=user1_tok,
+        )
+
+        # User2 knocks on the room
+        knock_channel = self.make_request(
+            "POST",
+            "/_matrix/client/r0/knock/%s" % (knock_room_id,),
+            b"{}",
+            user2_tok,
+        )
+        self.assertEqual(knock_channel.code, 200, knock_channel.result)
+
+        room_membership_summary = self.get_success(
+            self.store.get_room_summary(knock_room_id)
+        )
+
+        hero_user_ids = extract_heroes_from_room_summary(
+            room_membership_summary, me="@fakeuser"
+        )
+
+        # user1 is the creator and is joined to the room (should show up as a hero)
+        # user2 is knocking on the room (should not show up as a hero)
+        self.assertListEqual(
+            hero_user_ids,
+            [user1_id],
+        )
+
+
 class CurrentStateMembershipUpdateTestCase(unittest.HomeserverTestCase):
     def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
         self.store = hs.get_datastores().main