patch 8.2.0459: cannot check if a function name is correct Commit: https://github.com/vim/vim/commit/15c476023f3c5fb32eb1936c5eb5f0f5f413f3c7 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Mar 26 22:16:48 2020 +0100 patch 8.2.0459: cannot check if a function name is correct Problem: Cannot check if a function name is correct. Solution: Add "?funcname" to exists().

" 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