Fire initial match user states in TestMultiplayerClient

osu.Game/Online/Multiplayer/MultiplayerClient.cs

@@ -142,6 +142,8 @@ namespace osu.Game.Online.Multiplayer
                     APIRoom = room;
                     foreach (var user in joinedRoom.Users)
                         updateUserPlayingState(user.UserID, user.State);
+
+                    OnRoomJoined();
                 }, cancellationSource.Token).ConfigureAwait(false);
 
                 // Update room settings.
@@ -149,6 +151,13 @@ namespace osu.Game.Online.Multiplayer
             }, cancellationSource.Token).ConfigureAwait(false);
         }
 
+        /// <summary>
+        /// Fired when the room join sequence is complete
+        /// </summary>
+        protected virtual void OnRoomJoined()
+        {
+        }
+
         /// <summary>
         /// Joins the <see cref="MultiplayerRoom"/> with a given ID.
         /// </summary>