Tests: Add unittest for sending updates on a no-longer but previously visible object.
Tests: Add unittest for sending updates on a no-longer but previously visible object.

blindsighttf2/Astron,pizcogirl/Astron,ketoo/Astron,ketoo/Astron,pizcogirl/Astron,blindsighttf2/Astron,blindsighttf2/Astron,ketoo/Astron,pizcogirl/Astron,pizcogirl/Astron,blindsighttf2/Astron,ketoo/Astron