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test_backspace_opt.vim
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" Tests for 'backspace' settings
func Test_backspace_option()
set backspace=
call assert_equal('', &backspace)
set backspace=indent
call assert_equal('indent', &backspace)
set backspace=eol
call assert_equal('eol', &backspace)
set backspace=start
call assert_equal('start', &backspace)
set backspace=nostop
call assert_equal('nostop', &backspace)
" Add the value
set backspace=
set backspace=indent
call assert_equal('indent', &backspace)
set backspace+=eol
call assert_equal('indent,eol', &backspace)
set backspace+=start
call assert_equal('indent,eol,start', &backspace)
set backspace+=nostop
call assert_equal('indent,eol,start,nostop', &backspace)
" Delete the value
set backspace-=nostop
call assert_equal('indent,eol,start', &backspace)
set backspace-=indent
call assert_equal('eol,start', &backspace)
set backspace-=start
call assert_equal('eol', &backspace)
set backspace-=eol
call assert_equal('', &backspace)
" Check the error
call assert_fails('set backspace=ABC', 'E474:')
call assert_fails('set backspace+=def', 'E474:')
" NOTE: Vim doesn't check following error...
"call assert_fails('set backspace-=ghi', 'E474:')
" Check backwards compatibility with version 5.4 and earlier
set backspace=0
call assert_equal('0', &backspace)
set backspace=1
call assert_equal('1', &backspace)
set backspace=2
call assert_equal('2', &backspace)
set backspace=3
call assert_equal('3', &backspace)
call assert_fails('set backspace=4', 'E474:')
call assert_fails('set backspace=10', 'E474:')
" Cleared when 'compatible' is set
set compatible
call assert_equal('', &backspace)
set nocompatible viminfo+=nviminfo
endfunc
" Test with backspace set to the non-compatible setting
func Test_backspace_ctrl_u()
new
call append(0, [
\ "1 this shouldn't be deleted",
\ "2 this shouldn't be deleted",
\ "3 this shouldn't be deleted",
\ "4 this should be deleted",
\ "5 this shouldn't be deleted",
\ "6 this shouldn't be deleted",
\ "7 this shouldn't be deleted",
\ "8 this shouldn't be deleted (not touched yet)"])
call cursor(2, 1)
set compatible
set backspace=2
exe "normal Avim1\<C-U>\<Esc>\<CR>"
exe "normal Avim2\<C-G>u\<C-U>\<Esc>\<CR>"
set cpo-=<
inoremap <c-u> <left><c-u>
exe "normal Avim3\<*C-U>\<Esc>\<CR>"
iunmap <c-u>
exe "normal Avim4\<C-U>\<C-U>\<Esc>\<CR>"
" Test with backspace set to the compatible setting
set backspace= visualbell
exe "normal A vim5\<Esc>A\<C-U>\<C-U>\<Esc>\<CR>"
exe "normal A vim6\<Esc>Azwei\<C-G>u\<C-U>\<Esc>\<CR>"
inoremap <c-u> <left><c-u>
exe "normal A vim7\<*C-U>\<*C-U>\<Esc>\<CR>"
call assert_equal([
\ "1 this shouldn't be deleted",
\ "2 this shouldn't be deleted",
\ "3 this shouldn't be deleted",
\ "4 this should be deleted3",
\ "",
\ "6 this shouldn't be deleted vim5",
\ "7 this shouldn't be deleted vim6",
\ "8 this shouldn't be deleted (not touched yet) vim7",
\ ""], getline(1, '$'))
" Reset values
set compatible&vim
set visualbell&vim
set backspace&vim
" Test new nostop option
%d_
let expected = "foo bar foobar"
call setline(1, expected)
call cursor(1, 8)
exe ":norm! ianotherone\<c-u>"
call assert_equal(expected, getline(1))
call cursor(1, 8)
exe ":norm! ianothertwo\<c-w>"
call assert_equal(expected, getline(1))
let content = getline(1)
for value in ['indent,nostop', 'eol,nostop', 'indent,eol,nostop', 'indent,eol,start,nostop']
exe ":set bs=".. value
%d _
call setline(1, content)
let expected = " foobar"
call cursor(1, 8)
exe ":norm! ianotherone\<c-u>"
call assert_equal(expected, getline(1), 'CTRL-U backspace value: '.. &bs)
let expected = "foo foobar"
call setline(1, content)
call cursor(1, 8)
exe ":norm! ianothertwo\<c-w>"
call assert_equal(expected, getline(1), 'CTRL-W backspace value: '.. &bs)
endfor
" Reset options
set compatible&vim
set visualbell&vim
set backspace&vim
close!
endfunc
" Test for setting 'backspace' to a number value (for backward compatibility)
func Test_backspace_number_value()
new
set backspace=0
call setline(1, ['one two', 'three four'])
call cursor(2, 1)
exe "normal! A\<C-W>\<C-U>"
call assert_equal('three four', getline(2))
set backspace=1
exe "normal! A\<CR>five\<C-W>\<C-U>\<C-W>\<C-U>"
call assert_equal(['one two', 'three four'], getline(1, '$'))
set backspace=2
call cursor(2, 7)
exe "normal! ihalf\<C-U>"
call assert_equal('three four', getline(2))
set backspace=3
call cursor(2, 7)
exe "normal! ihalf\<C-U>"
call assert_equal('four', getline(2))
bw!
set backspace&
endfunc
" vim: shiftwidth=2 sts=2 expandtab