Check out subscription about moving topic, author subscribes to branch, where topic was moved in, checkbox 'Auto-subscribe' is enabled

Pre-Conditions:

1. User1 and User2 are registered and logged in
2. At least two branches are created
3. User1 has checked "Auto subscribe" checkbox in the profile
4. User1 has permission CREATE_POSTS on an appropriate branch
5. User2 has permissions VIEW_TOPICS, MOVE_TOPICS on an appropriate branch