patch 8.1.1420: popup window size only uses first line length commit https://github.com/vim/vim/commit/88c4e1f06905983870175a473683e81312d14c64 Author: Bram Moolenaar <Bram@vim.org> Date: Wed May 29 23:14:28 2019 +0200 patch 8.1.1420: popup window size only uses first line length Problem: Popup window size only uses first line length. Solution: Use the longest line. (Ben Jackson, closes https://github.com/vim/vim/issues/4451) Also deal with wrapping lines.

" 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