patch 8.0.0375: the "+ register is not tested commit https://github.com/vim/vim/commit/5074a0e0333eaa6a9f697eb765124ca0e244c89b Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 26 15:08:21 2017 +0100 patch 8.0.0375: the "+ register is not tested Problem: The "+ register is not tested. Solution: Add a test using another Vim instance to change the "+ register. (Kazuki Kuriyama)

" 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