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)

" Tests for :undo

func Test_ex_undo()
  new ex-undo
  setlocal ul=10
  exe "normal ione\n\<Esc>"
  setlocal ul=10
  exe "normal itwo\n\<Esc>"
  setlocal ul=10
  exe "normal ithree\n\<Esc>"
  call assert_equal(4, line('$'))
  undo
  call assert_equal(3, line('$'))
  undo 1
  call assert_equal(2, line('$'))
  undo 0
  call assert_equal(1, line('$'))
  quit!
endfunc