patch 8.0.1190: unusable after opening new window in BufWritePre event commit https://github.com/vim/vim/commit/2c33d7bb69c4c2c5b0e39b03cc4b0c04cfdfbb0b Author: Bram Moolenaar <Bram@vim.org> Date: Sat Oct 14 16:06:20 2017 +0200 patch 8.0.1190: unusable after opening new window in BufWritePre event Problem: Vim becomes unusable after opening new window in BufWritePre event. Solution: Call not_exiting(). (Martin Tournoij, closes #2205) Also for "2q" when a help window is open. Add a test.

" Test for python 2 commands.
" TODO: move tests from test87.in here.

if !has('python')
  finish
endif

func Test_pydo()
  " Check deleting lines does not trigger ml_get error.
  py import vim
  new
  call setline(1, ['one', 'two', 'three'])
  pydo vim.command("%d_")
  bwipe!

  " Check switching to another buffer does not trigger ml_get error.
  new
  let wincount = winnr('$')
  call setline(1, ['one', 'two', 'three'])
  pydo vim.command("new")
  call assert_equal(wincount + 1, winnr('$'))
  bwipe!
  bwipe!
endfunc