Perhaps we will need to use [yamatanooroti](https://github.com/aycabta/yamatanooroti) and [vterm-gem](https://github.com/aycabta/vterm-gem) the way reline itself does in [test_rendering.rb](https://github.com/ruby/reline/blob/100cc1606a75fb060db274c2a1c4a082af3a5a82/test/reline/yamatanooroti/test_rendering.rb)