Fixed bugs and added tests

osu.Game/OsuGame.cs

@@ -119,7 +119,12 @@ namespace osu.Game
 
         private ScheduledDelegate scoreLoad;
 
-        // TODO: Implement this properly as soon as the Editor is done
+        #region chat link actions
+
+        internal void OpenChannel(string channelName) => chat.OpenChannel(chat.AvailableChannels.Find(c => c.Name == channelName));
+
+        internal void ShowBeatmapSet(int setId) => beatmapSetOverlay.ShowBeatmapSet(setId);
+
         internal void LoadEditorTimestamp()
         {
             notifications.Post(new SimpleNotification
@@ -147,6 +152,8 @@ namespace osu.Game
             });
         }
 
+        #endregion
+
         protected void LoadScore(Score s)
         {
             scoreLoad?.Cancel();