patch 8.1.0334: 'autowrite' takes effect when buffer is not to be written commit https://github.com/vim/vim/commit/8c9e7b00f6566dc41e794ef11c93d93b034c7134 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Aug 30 13:07:17 2018 +0200 patch 8.1.0334: 'autowrite' takes effect when buffer is not to be written Problem: 'autowrite' takes effect when buffer is not to be written. Solution: Don't write buffers that are not supposed to be written. (Even Q Jones, closes #3391) Add tests for 'autowrite'.

" 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