src/testdir/test_visual.vim

" Tests for various Visual mode.
if !has('visual')
  finish
endif

set belloff=all

func Test_block_shift_multibyte()
  " Uses double-wide character.
  if !has('multi_byte')
    return
  endif
  split
  call setline(1, ['xヹxxx', 'ヹxxx'])
  exe "normal 1G0l\<C-V>jl>"
  call assert_equal('x	 ヹxxx', getline(1))
  call assert_equal('	ヹxxx', getline(2))
  q!
endfunc

func Test_block_shift_overflow()
  " This used to cause a multiplication overflow followed by a crash.
  new
  normal ii
  exe "normal \<C-V>876543210>"
  q!
endfunc

func Test_dotregister_paste()
  new
  exe "norm! ihello world\<esc>"
  norm! 0ve".p
  call assert_equal('hello world world', getline(1))
  q!
endfunc

func Test_Visual_ctrl_o()
  new
  call setline(1, ['one', 'two', 'three'])
  call cursor(1,2)
  set noshowmode
  set tw=0
  call feedkeys("\<c-v>jjlIa\<c-\>\<c-o>:set tw=88\<cr>\<esc>", 'tx')
  call assert_equal(['oane', 'tawo', 'tahree'], getline(1, 3))
  call assert_equal(88, &tw)
  set tw&
  bw!
endfu

func Test_Visual_vapo()
  new
  normal oxx
  normal vapo
  bwipe!
endfunc

func Test_Visual_inner_quote()
  new
  normal oxX
  normal vki'
  bwipe!
endfunc

" Test for Visual mode not being reset causing E315 error.
func TriggerTheProblem()
  " At this point there is no visual selection because :call reset it.
  " Let's restore the selection:
  normal gv
  '<,'>del _
  try
      exe "normal \<Esc>"
  catch /^Vim\%((\a\+)\)\=:E315/
      echom 'Snap! E315 error!'
      let g:msg='Snap! E315 error!'
  endtry
endfunc

func Test_visual_mode_reset()
  set belloff=all
  enew
  let g:msg="Everything's fine."
  enew
  setl buftype=nofile
  call append(line('$'), 'Delete this line.')

  " NOTE: this has to be done by a call to a function because executing :del
  " the ex-way will require the colon operator which resets the visual mode
  " thus preventing the problem:
  exe "normal! GV:call TriggerTheProblem()\<CR>"
  call assert_equal("Everything's fine.", g:msg)

  set belloff&
endfunc