patch 8.0.1020: when a timer calls getchar(1) input is overwritten commit https://github.com/vim/vim/commit/0f0f230012f5a9beb6876158a17b432534836c6f Author: Bram Moolenaar <Bram@vim.org> Date: Wed Aug 30 18:52:56 2017 +0200 patch 8.0.1020: when a timer calls getchar(1) input is overwritten Problem: When a timer calls getchar(1) input is overwritten. Solution: Increment tb_change_cnt in inchar(). (closes https://github.com/vim/vim/issues/1940)

" 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