patch 8.2.0446: listener with undo of deleting all lines not tested Commit: https://github.com/vim/vim/commit/a07e31af545b91925362854a48c42fee16dd8c28 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Mar 25 21:13:46 2020 +0100 patch 8.2.0446: listener with undo of deleting all lines not tested Problem: Listener with undo of deleting all lines not tested. Solution: Add a test.

" Test feedkeys() function.

func Test_feedkeys_x_with_empty_string()
  new
  call feedkeys("ifoo\<Esc>")
  call assert_equal('', getline('.'))
  call feedkeys('', 'x')
  call assert_equal('foo', getline('.'))

  " check it goes back to normal mode immediately.
  call feedkeys('i', 'x')
  call assert_equal('foo', getline('.'))
  quit!
endfunc