--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -1,1684 +1,1684 @@
-" Test for options
-
-source shared.vim
-source check.vim
-source view_util.vim
-
-func Test_whichwrap()
-  set whichwrap=b,s
-  call assert_equal('b,s', &whichwrap)
-
-  set whichwrap+=h,l
-  call assert_equal('b,s,h,l', &whichwrap)
-
-  set whichwrap+=h,l
-  call assert_equal('b,s,h,l', &whichwrap)
-
-  set whichwrap+=h,l
-  call assert_equal('b,s,h,l', &whichwrap)
-
-  set whichwrap=h,h
-  call assert_equal('h', &whichwrap)
-
-  set whichwrap=h,h,h
-  call assert_equal('h', &whichwrap)
-
-  " For compatibility with Vim 3.0 and before, number values are also
-  " supported for 'whichwrap'
-  set whichwrap=1
-  call assert_equal('b', &whichwrap)
-  set whichwrap=2
-  call assert_equal('s', &whichwrap)
-  set whichwrap=4
-  call assert_equal('h,l', &whichwrap)
-  set whichwrap=8
-  call assert_equal('<,>', &whichwrap)
-  set whichwrap=16
-  call assert_equal('[,]', &whichwrap)
-  set whichwrap=31
-  call assert_equal('b,s,h,l,<,>,[,]', &whichwrap)
-
-  set whichwrap&
-endfunc
-
-func Test_isfname()
-  " This used to cause Vim to access uninitialized memory.
-  set isfname=
-  call assert_equal("~X", expand("~X"))
-  set isfname&
-  " Test for setting 'isfname' to an unsupported character
-  let save_isfname = &isfname
-  call assert_fails('exe $"set isfname+={"\u1234"}"', 'E474:')
-  call assert_equal(save_isfname, &isfname)
-endfunc
-
-" Test for getting the value of 'pastetoggle'
-func Test_pastetoggle()
-  " character with K_SPECIAL byte
-  let &pastetoggle = '…'
-  call assert_equal('…', &pastetoggle)
-  call assert_equal("\n  pastetoggle=…", execute('set pastetoggle?'))
-
-  " modified character with K_SPECIAL byte
-  let &pastetoggle = '<M-…>'
-  call assert_equal('<M-…>', &pastetoggle)
-  call assert_equal("\n  pastetoggle=<M-…>", execute('set pastetoggle?'))
-
-  " illegal bytes
-  let str = ":\x7f:\x80:\x90:\xd0:"
-  let &pastetoggle = str
-  call assert_equal(str, &pastetoggle)
-  call assert_equal("\n  pastetoggle=" .. strtrans(str), execute('set pastetoggle?'))
-
-  unlet str
-  set pastetoggle&
-endfunc
-
-func Test_wildchar()
-  " Empty 'wildchar' used to access invalid memory.
-  call assert_fails('set wildchar=', 'E521:')
-  call assert_fails('set wildchar=abc', 'E521:')
-  set wildchar=<Esc>
-  let a=execute('set wildchar?')
-  call assert_equal("\n  wildchar=<Esc>", a)
-  set wildchar=27
-  let a=execute('set wildchar?')
-  call assert_equal("\n  wildchar=<Esc>", a)
-  set wildchar&
-endfunc
-
-func Test_wildoptions()
-  set wildoptions=
-  set wildoptions+=tagfile
-  set wildoptions+=tagfile
-  call assert_equal('tagfile', &wildoptions)
-endfunc
-
-func Test_options_command()
-  let caught = 'ok'
-  try
-    options
-  catch
-    let caught = v:throwpoint . "\n" . v:exception
-  endtry
-  call assert_equal('ok', caught)
-
-  " Check if the option-window is opened horizontally.
-  wincmd j
-  call assert_notequal('option-window', bufname(''))
-  wincmd k
-  call assert_equal('option-window', bufname(''))
-  " close option-window
-  close
-
-  " Open the option-window vertically.
-  vert options
-  " Check if the option-window is opened vertically.
-  wincmd l
-  call assert_notequal('option-window', bufname(''))
-  wincmd h
-  call assert_equal('option-window', bufname(''))
-  " close option-window
-  close
-
-  " Open the option-window at the top.
-  set splitbelow
-  topleft options
-  call assert_equal(1, winnr())
-  close
-
-  " Open the option-window at the bottom.
-  set nosplitbelow
-  botright options
-  call assert_equal(winnr('$'), winnr())
-  close
-  set splitbelow&
-
-  " Open the option-window in a new tab.
-  tab options
-  " Check if the option-window is opened in a tab.
-  normal gT
-  call assert_notequal('option-window', bufname(''))
-  normal gt
-  call assert_equal('option-window', bufname(''))
-  " close option-window
-  close
-
-  " Open the options window browse
-  if has('browse')
-    browse set
-    call assert_equal('option-window', bufname(''))
-    close
-  endif
-endfunc
-
-func Test_path_keep_commas()
-  " Test that changing 'path' keeps two commas.
-  set path=foo,,bar
-  set path-=bar
-  set path+=bar
-  call assert_equal('foo,,bar', &path)
-
-  set path&
-endfunc
-
-func Test_path_too_long()
-  exe 'set path=' .. repeat('x', 10000)
-  call assert_fails('find x', 'E854:')
-  set path&
-endfunc
-
-func Test_signcolumn()
-  CheckFeature signs
-  call assert_equal("auto", &signcolumn)
-  set signcolumn=yes
-  set signcolumn=no
-  call assert_fails('set signcolumn=nope')
-endfunc
-
-func Test_filetype_valid()
-  set ft=valid_name
-  call assert_equal("valid_name", &filetype)
-  set ft=valid-name
-  call assert_equal("valid-name", &filetype)
-
-  call assert_fails(":set ft=wrong;name", "E474:")
-  call assert_fails(":set ft=wrong\\\\name", "E474:")
-  call assert_fails(":set ft=wrong\\|name", "E474:")
-  call assert_fails(":set ft=wrong/name", "E474:")
-  call assert_fails(":set ft=wrong\\\nname", "E474:")
-  call assert_equal("valid-name", &filetype)
-
-  exe "set ft=trunc\x00name"
-  call assert_equal("trunc", &filetype)
-endfunc
-
-func Test_syntax_valid()
-  CheckFeature syntax
-  set syn=valid_name
-  call assert_equal("valid_name", &syntax)
-  set syn=valid-name
-  call assert_equal("valid-name", &syntax)
-
-  call assert_fails(":set syn=wrong;name", "E474:")
-  call assert_fails(":set syn=wrong\\\\name", "E474:")
-  call assert_fails(":set syn=wrong\\|name", "E474:")
-  call assert_fails(":set syn=wrong/name", "E474:")
-  call assert_fails(":set syn=wrong\\\nname", "E474:")
-  call assert_equal("valid-name", &syntax)
-
-  exe "set syn=trunc\x00name"
-  call assert_equal("trunc", &syntax)
-endfunc
-
-func Test_keymap_valid()
-  CheckFeature keymap
-  call assert_fails(":set kmp=valid_name", "E544:")
-  call assert_fails(":set kmp=valid_name", "valid_name")
-  call assert_fails(":set kmp=valid-name", "E544:")
-  call assert_fails(":set kmp=valid-name", "valid-name")
-
-  call assert_fails(":set kmp=wrong;name", "E474:")
-  call assert_fails(":set kmp=wrong\\\\name", "E474:")
-  call assert_fails(":set kmp=wrong\\|name", "E474:")
-  call assert_fails(":set kmp=wrong/name", "E474:")
-  call assert_fails(":set kmp=wrong\\\nname", "E474:")
-
-  call assert_fails(":set kmp=trunc\x00name", "E544:")
-  call assert_fails(":set kmp=trunc\x00name", "trunc")
-endfunc
-
-func Check_dir_option(name)
-  " Check that it's possible to set the option.
-  exe 'set ' . a:name . '=/usr/share/dict/words'
-  call assert_equal('/usr/share/dict/words', eval('&' . a:name))
-  exe 'set ' . a:name . '=/usr/share/dict/words,/and/there'
-  call assert_equal('/usr/share/dict/words,/and/there', eval('&' . a:name))
-  exe 'set ' . a:name . '=/usr/share/dict\ words'
-  call assert_equal('/usr/share/dict words', eval('&' . a:name))
-
-  " Check rejecting weird characters.
-  call assert_fails("set " . a:name . "=/not&there", "E474:")
-  call assert_fails("set " . a:name . "=/not>there", "E474:")
-  call assert_fails("set " . a:name . "=/not.*there", "E474:")
-endfunc
-
-func Test_cinkeys()
-  " This used to cause invalid memory access
-  set cindent cinkeys=0
-  norm a
-  set cindent& cinkeys&
-endfunc
-
-func Test_dictionary()
-  call Check_dir_option('dictionary')
-endfunc
-
-func Test_thesaurus()
-  call Check_dir_option('thesaurus')
-endfun
-
-func Test_complete()
-  " Trailing single backslash used to cause invalid memory access.
-  set complete=s\
-  new
-  call feedkeys("i\<C-N>\<Esc>", 'xt')
-  bwipe!
-  call assert_fails('set complete=ix', 'E535:')
-  set complete&
-endfun
-
-func Test_set_completion()
-  call feedkeys(":set di\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set dictionary diff diffexpr diffopt digraph directory display', @:)
-
-  call feedkeys(":setlocal di\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"setlocal dictionary diff diffexpr diffopt digraph directory display', @:)
-
-  call feedkeys(":setglobal di\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"setglobal dictionary diff diffexpr diffopt digraph directory display', @:)
-
-  " Expand boolean options. When doing :set no<Tab> Vim prefixes the option
-  " names with "no".
-  call feedkeys(":set nodi\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set nodiff nodigraph', @:)
-
-  call feedkeys(":set invdi\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set invdiff invdigraph', @:)
-
-  " Expanding "set noinv" does nothing.
-  call feedkeys(":set noinv\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set noinv', @:)
-
-  " Expand abbreviation of options.
-  call feedkeys(":set ts\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set tabstop thesaurus thesaurusfunc ttyscroll', @:)
-
-  " Expand current value
-  call feedkeys(":set fileencodings=\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set fileencodings=ucs-bom,utf-8,default,latin1', @:)
-
-  call feedkeys(":set fileencodings:\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set fileencodings:ucs-bom,utf-8,default,latin1', @:)
-
-  " Expand key codes.
-  call feedkeys(":set <H\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set <Help> <Home>', @:)
-
-  " Expand terminal options.
-  call feedkeys(":set t_A\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set t_AB t_AF t_AU t_AL', @:)
-  call assert_fails('call feedkeys(":set <t_afoo>=\<C-A>\<CR>", "xt")', 'E474:')
-
-  " Expand directories.
-  call feedkeys(":set cdpath=./\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_match(' ./samples/ ', @:)
-  call assert_notmatch(' ./summarize.vim ', @:)
-
-  " Expand files and directories.
-  call feedkeys(":set tags=./\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_match(' ./samples/.* ./summarize.vim', @:)
-
-  call feedkeys(":set tags=./\\\\ dif\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set tags=./\\ diff diffexpr diffopt', @:)
-  set tags&
-
-  " Expanding the option names
-  call feedkeys(":set \<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal('"set all', @:)
-
-  " Expanding a second set of option names
-  call feedkeys(":set wrapscan \<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal('"set wrapscan all', @:)
-
-  " Expanding a special keycode
-  call feedkeys(":set <Home>\<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal('"set <Home>', @:)
-
-  " Expanding an invalid special keycode
-  call feedkeys(":set <abcd>\<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal("\"set <abcd>\<Tab>", @:)
-
-  " Expanding a terminal keycode
-  call feedkeys(":set t_AB\<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal("\"set t_AB", @:)
-
-  " Expanding an invalid option name
-  call feedkeys(":set abcde=\<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal("\"set abcde=\<Tab>", @:)
-
-  " Expanding after a = for a boolean option
-  call feedkeys(":set wrapscan=\<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal("\"set wrapscan=\<Tab>", @:)
-
-  " Expanding a numeric option
-  call feedkeys(":set tabstop+=\<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal("\"set tabstop+=" .. &tabstop, @:)
-
-  " Expanding a non-boolean option
-  call feedkeys(":set invtabstop=\<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal("\"set invtabstop=", @:)
-
-  " Expand options for 'spellsuggest'
-  call feedkeys(":set spellsuggest=best,file:xyz\<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal("\"set spellsuggest=best,file:xyz", @:)
-
-  " Expand value for 'key'
-  set key=abcd
-  call feedkeys(":set key=\<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal('"set key=*****', @:)
-  set key=
-
-  " Expand values for 'filetype'
-  call feedkeys(":set filetype=sshdconfi\<Tab>\<C-B>\"\<CR>", 'xt')
-  call assert_equal('"set filetype=sshdconfig', @:)
-  call feedkeys(":set filetype=a\<C-A>\<C-B>\"\<CR>", 'xt')
-  call assert_equal('"set filetype=' .. getcompletion('a*', 'filetype')->join(), @:)
-endfunc
-
-func Test_set_option_errors()
-  call assert_fails('set scroll=-1', 'E49:')
-  call assert_fails('set backupcopy=', 'E474:')
-  call assert_fails('set regexpengine=3', 'E474:')
-  call assert_fails('set history=10001', 'E474:')
-  call assert_fails('set numberwidth=21', 'E474:')
-  call assert_fails('set colorcolumn=-a', 'E474:')
-  call assert_fails('set colorcolumn=a', 'E474:')
-  call assert_fails('set colorcolumn=1,', 'E474:')
-  call assert_fails('set colorcolumn=1;', 'E474:')
-  call assert_fails('set cmdheight=-1', 'E487:')
-  call assert_fails('set cmdwinheight=-1', 'E487:')
-  if has('conceal')
-    call assert_fails('set conceallevel=-1', 'E487:')
-    call assert_fails('set conceallevel=4', 'E474:')
-  endif
-  call assert_fails('set helpheight=-1', 'E487:')
-  call assert_fails('set history=-1', 'E487:')
-  call assert_fails('set report=-1', 'E487:')
-  call assert_fails('set shiftwidth=-1', 'E487:')
-  call assert_fails('set sidescroll=-1', 'E487:')
-  call assert_fails('set tabstop=-1', 'E487:')
-  call assert_fails('set tabstop=10000', 'E474:')
-  call assert_fails('let &tabstop = 10000', 'E474:')
-  call assert_fails('set tabstop=5500000000', 'E474:')
-  call assert_fails('set textwidth=-1', 'E487:')
-  call assert_fails('set timeoutlen=-1', 'E487:')
-  call assert_fails('set updatecount=-1', 'E487:')
-  call assert_fails('set updatetime=-1', 'E487:')
-  call assert_fails('set winheight=-1', 'E487:')
-  call assert_fails('set tabstop!', 'E488:')
-  call assert_fails('set xxx', 'E518:')
-  call assert_fails('set beautify?', 'E519:')
-  call assert_fails('set undolevels=x', 'E521:')
-  call assert_fails('set tabstop=', 'E521:')
-  call assert_fails('set comments=-', 'E524:')
-  call assert_fails('set comments=a', 'E525:')
-  call assert_fails('set foldmarker=x', 'E536:')
-  call assert_fails('set commentstring=x', 'E537:')
-  call assert_fails('let &commentstring = "x"', 'E537:')
-  call assert_fails('set complete=x', 'E539:')
-  call assert_fails('set rulerformat=%-', 'E539:')
-  call assert_fails('set rulerformat=%(', 'E542:')
-  call assert_fails('set rulerformat=%15(%%', 'E542:')
-  call assert_fails('set statusline=%$', 'E539:')
-  call assert_fails('set statusline=%{', 'E540:')
-  call assert_fails('set statusline=%{%', 'E540:')
-  call assert_fails('set statusline=%{%}', 'E539:')
-  call assert_fails('set statusline=%(', 'E542:')
-  call assert_fails('set statusline=%)', 'E542:')
-  call assert_fails('set tabline=%$', 'E539:')
-  call assert_fails('set tabline=%{', 'E540:')
-  call assert_fails('set tabline=%{%', 'E540:')
-  call assert_fails('set tabline=%{%}', 'E539:')
-  call assert_fails('set tabline=%(', 'E542:')
-  call assert_fails('set tabline=%)', 'E542:')
-
-  if has('cursorshape')
-    " This invalid value for 'guicursor' used to cause Vim to crash.
-    call assert_fails('set guicursor=i-ci,r-cr:h', 'E545:')
-    call assert_fails('set guicursor=i-ci', 'E545:')
-    call assert_fails('set guicursor=x', 'E545:')
-    call assert_fails('set guicursor=x:', 'E546:')
-    call assert_fails('set guicursor=r-cr:horx', 'E548:')
-    call assert_fails('set guicursor=r-cr:hor0', 'E549:')
-  endif
-  if has('mouseshape')
-    call assert_fails('se mouseshape=i-r:x', 'E547:')
-  endif
-
-  " Test for 'backupext' and 'patchmode' set to the same value
-  set backupext=.bak
-  set patchmode=.patch
-  call assert_fails('set patchmode=.bak', 'E589:')
-  call assert_equal('.patch', &patchmode)
-  call assert_fails('set backupext=.patch', 'E589:')
-  call assert_equal('.bak', &backupext)
-  set backupext& patchmode&
-
-  call assert_fails('set winminheight=10 winheight=9', 'E591:')
-  set winminheight& winheight&
-  set winheight=10 winminheight=10
-  call assert_fails('set winheight=9', 'E591:')
-  set winminheight& winheight&
-  call assert_fails('set winminwidth=10 winwidth=9', 'E592:')
-  set winminwidth& winwidth&
-  call assert_fails('set winwidth=9 winminwidth=10', 'E592:')
-  set winwidth& winminwidth&
-  call assert_fails("set showbreak=\x01", 'E595:')
-  call assert_fails('set t_foo=', 'E846:')
-  call assert_fails('set tabstop??', 'E488:')
-  call assert_fails('set wrapscan!!', 'E488:')
-  call assert_fails('set tabstop&&', 'E488:')
-  call assert_fails('set wrapscan<<', 'E488:')
-  call assert_fails('set wrapscan=1', 'E474:')
-  call assert_fails('set autoindent@', 'E488:')
-  call assert_fails('set wildchar=<abc>', 'E474:')
-  call assert_fails('set cmdheight=1a', 'E521:')
-  call assert_fails('set invcmdheight', 'E474:')
-  if has('python') || has('python3')
-    call assert_fails('set pyxversion=6', 'E474:')
-  endif
-  call assert_fails("let &tabstop='ab'", ['E521:', 'E521:'])
-  call assert_fails('set spellcapcheck=%\\(', 'E54:')
-  call assert_fails('set sessionoptions=curdir,sesdir', 'E474:')
-  call assert_fails('set foldmarker={{{,', 'E474:')
-  call assert_fails('set sessionoptions=sesdir,curdir', 'E474:')
-  setlocal listchars=trail:·
-  call assert_fails('set ambiwidth=double', 'E834:')
-  setlocal listchars=trail:-
-  setglobal listchars=trail:·
-  call assert_fails('set ambiwidth=double', 'E834:')
-  set listchars&
-  setlocal fillchars=stl:·
-  call assert_fails('set ambiwidth=double', 'E835:')
-  setlocal fillchars=stl:-
-  setglobal fillchars=stl:·
-  call assert_fails('set ambiwidth=double', 'E835:')
-  set fillchars&
-  call assert_fails('set fileencoding=latin1,utf-8', 'E474:')
-  set nomodifiable
-  call assert_fails('set fileencoding=latin1', 'E21:')
-  set modifiable&
-  call assert_fails('set t_#-&', 'E522:')
-  call assert_fails('let &formatoptions = "?"', 'E539:')
-  call assert_fails('call setbufvar("", "&formatoptions", "?")', 'E539:')
-  call assert_fails('call setwinvar(0, "&scrolloff", [])', ['E745:', 'E745:'])
-  call assert_fails('call setwinvar(0, "&list", [])', ['E745:', 'E745:'])
-  call assert_fails('call setwinvar(0, "&listchars", [])', ['E730:', 'E730:'])
-  call assert_fails('call setwinvar(0, "&nosuchoption", 0)', ['E355:', 'E355:'])
-  call assert_fails('call setwinvar(0, "&nosuchoption", "")', ['E355:', 'E355:'])
-  call assert_fails('call setwinvar(0, "&nosuchoption", [])', ['E355:', 'E355:'])
-endfunc
-
-func Test_set_encoding()
-  let save_encoding = &encoding
-
-  set enc=iso8859-1
-  call assert_equal('latin1', &enc)
-  set enc=iso8859_1
-  call assert_equal('latin1', &enc)
-  set enc=iso-8859-1
-  call assert_equal('latin1', &enc)
-  set enc=iso_8859_1
-  call assert_equal('latin1', &enc)
-  set enc=iso88591
-  call assert_equal('latin1', &enc)
-  set enc=iso8859
-  call assert_equal('latin1', &enc)
-  set enc=iso-8859
-  call assert_equal('latin1', &enc)
-  set enc=iso_8859
-  call assert_equal('latin1', &enc)
-  call assert_fails('set enc=iso8858', 'E474:')
-  call assert_equal('latin1', &enc)
-
-  let &encoding = save_encoding
-endfunc
-
-func CheckWasSet(name)
-  let verb_cm = execute('verbose set ' .. a:name .. '?')
-  call assert_match('Last set from.*test_options.vim', verb_cm)
-endfunc
-func CheckWasNotSet(name)
-  let verb_cm = execute('verbose set ' .. a:name .. '?')
-  call assert_notmatch('Last set from', verb_cm)
-endfunc
-
-" Must be executed before other tests that set 'term'.
-func Test_000_term_option_verbose()
-  CheckNotGui
-
-  call CheckWasNotSet('t_cm')
-
-  let term_save = &term
-  set term=ansi
-  call CheckWasSet('t_cm')
-  let &term = term_save
-endfunc
-
-func Test_copy_context()
-  setlocal list
-  call CheckWasSet('list')
-  split
-  call CheckWasSet('list')
-  quit
-  setlocal nolist
-
-  set ai
-  call CheckWasSet('ai')
-  set filetype=perl
-  call CheckWasSet('filetype')
-  set fo=tcroq
-  call CheckWasSet('fo')
-
-  split Xsomebuf
-  call CheckWasSet('ai')
-  call CheckWasNotSet('filetype')
-  call CheckWasSet('fo')
-endfunc
-
-func Test_set_ttytype()
-  CheckUnix
-  CheckNotGui
-
-  " Setting 'ttytype' used to cause a double-free when exiting vim and
-  " when vim is compiled with -DEXITFREE.
-  set ttytype=ansi
-  call assert_equal('ansi', &ttytype)
-  call assert_equal(&ttytype, &term)
-  set ttytype=xterm
-  call assert_equal('xterm', &ttytype)
-  call assert_equal(&ttytype, &term)
-  try
-    set ttytype=
-    call assert_report('set ttytype= did not fail')
-  catch /E529/
-  endtry
-
-  " Some systems accept any terminal name and return dumb settings,
-  " check for failure of finding the entry and for missing 'cm' entry.
-  try
-    set ttytype=xxx
-    call assert_report('set ttytype=xxx did not fail')
-  catch /E522\|E437/
-  endtry
-
-  set ttytype&
-  call assert_equal(&ttytype, &term)
-
-  if has('gui') && !has('gui_running')
-    call assert_fails('set term=gui', 'E531:')
-  endif
-endfunc
-
-func Test_set_all()
-  set tw=75
-  set iskeyword=a-z,A-Z
-  set nosplitbelow
-  let out = execute('set all')
-  call assert_match('textwidth=75', out)
-  call assert_match('iskeyword=a-z,A-Z', out)
-  call assert_match('nosplitbelow', out)
-  set tw& iskeyword& splitbelow&
-endfunc
-
-func Test_set_one_column()
-  let out_mult = execute('set all')->split("\n")
-  let out_one = execute('set! all')->split("\n")
-  call assert_true(len(out_mult) < len(out_one))
-endfunc
-
-func Test_set_values()
-  " opt_test.vim is generated from ../optiondefs.h using gen_opt_test.vim
-  if filereadable('opt_test.vim')
-    source opt_test.vim
-  else
-    throw 'Skipped: opt_test.vim does not exist'
-  endif
-endfunc
-
-func Test_renderoptions()
-  " Only do this for Windows Vista and later, fails on Windows XP and earlier.
-  " Doesn't hurt to do this on a non-Windows system.
-  if windowsversion() !~ '^[345]\.'
-    set renderoptions=type:directx
-    set rop=type:directx
-  endif
-endfunc
-
-func ResetIndentexpr()
-  set indentexpr=
-endfunc
-
-func Test_set_indentexpr()
-  " this was causing usage of freed memory
-  set indentexpr=ResetIndentexpr()
-  new
-  call feedkeys("i\<c-f>", 'x')
-  call assert_equal('', &indentexpr)
-  bwipe!
-endfunc
-
-func Test_backupskip()
-  " Option 'backupskip' may contain several comma-separated path
-  " specifications if one or more of the environment variables TMPDIR, TMP,
-  " or TEMP is defined.  To simplify testing, convert the string value into a
-  " list.
-  let bsklist = split(&bsk, ',')
-
-  if has("mac")
-    let found = (index(bsklist, '/private/tmp/*') >= 0)
-    call assert_true(found, '/private/tmp not in option bsk: ' . &bsk)
-  elseif has("unix")
-    let found = (index(bsklist, '/tmp/*') >= 0)
-    call assert_true(found, '/tmp not in option bsk: ' . &bsk)
-  endif
-
-  " If our test platform is Windows, the path(s) in option bsk will use
-  " backslash for the path separator and the components could be in short
-  " (8.3) format.  As such, we need to replace the backslashes with forward
-  " slashes and convert the path components to long format.  The expand()
-  " function will do this but it cannot handle comma-separated paths.  This is
-  " why bsk was converted from a string into a list of strings above.
-  "
-  " One final complication is that the wildcard "/*" is at the end of each
-  " path and so expand() might return a list of matching files.  To prevent
-  " this, we need to remove the wildcard before calling expand() and then
-  " append it afterwards.
-  if has('win32')
-    let item_nbr = 0
-    while item_nbr < len(bsklist)
-      let path_spec = bsklist[item_nbr]
-      let path_spec = strcharpart(path_spec, 0, strlen(path_spec)-2)
-      let path_spec = substitute(expand(path_spec), '\\', '/', 'g')
-      let bsklist[item_nbr] = path_spec . '/*'
-      let item_nbr += 1
-    endwhile
-  endif
-
-  " Option bsk will also include these environment variables if defined.
-  " If they're defined, verify they appear in the option value.
-  for var in  ['$TMPDIR', '$TMP', '$TEMP']
-    if exists(var)
-      let varvalue = substitute(expand(var), '\\', '/', 'g')
-      let varvalue = substitute(varvalue, '/$', '', '')
-      let varvalue .= '/*'
-      let found = (index(bsklist, varvalue) >= 0)
-      call assert_true(found, var . ' (' . varvalue . ') not in option bsk: ' . &bsk)
-    endif
-  endfor
-
-  " Duplicates from environment variables should be filtered out (option has
-  " P_NODUP).  Run this in a separate instance and write v:errors in a file,
-  " so that we see what happens on startup.
-  let after =<< trim [CODE]
-      let bsklist = split(&backupskip, ',')
-      call assert_equal(uniq(copy(bsklist)), bsklist)
-      call writefile(['errors:'] + v:errors, 'Xtestout')
-      qall
-  [CODE]
-  call writefile(after, 'Xafter', 'D')
-  let cmd = GetVimProg() . ' --not-a-term -S Xafter --cmd "set enc=utf8"'
-
-  let saveenv = {}
-  for var in ['TMPDIR', 'TMP', 'TEMP']
-    let saveenv[var] = getenv(var)
-    call setenv(var, '/duplicate/path')
-  endfor
-
-  exe 'silent !' . cmd
-  call assert_equal(['errors:'], readfile('Xtestout'))
-
-  " restore environment variables
-  for var in ['TMPDIR', 'TMP', 'TEMP']
-    call setenv(var, saveenv[var])
-  endfor
-
-  call delete('Xtestout')
-
-  " Duplicates should be filtered out (option has P_NODUP)
-  let backupskip = &backupskip
-  set backupskip=
-  set backupskip+=/test/dir
-  set backupskip+=/other/dir
-  set backupskip+=/test/dir
-  call assert_equal('/test/dir,/other/dir', &backupskip)
-  let &backupskip = backupskip
-endfunc
-
-func Test_buf_copy_winopt()
-  set hidden
-
-  " Test copy option from current buffer in window
-  split
-  enew
-  setlocal numberwidth=5
-  wincmd w
-  call assert_equal(4,&numberwidth)
-  bnext
-  call assert_equal(5,&numberwidth)
-  bw!
-  call assert_equal(4,&numberwidth)
-
-  " Test copy value from window that used to be display the buffer
-  split
-  enew
-  setlocal numberwidth=6
-  bnext
-  wincmd w
-  call assert_equal(4,&numberwidth)
-  bnext
-  call assert_equal(6,&numberwidth)
-  bw!
-
-  " Test that if buffer is current, don't use the stale cached value
-  " from the last time the buffer was displayed.
-  split
-  enew
-  setlocal numberwidth=7
-  bnext
-  bnext
-  setlocal numberwidth=8
-  wincmd w
-  call assert_equal(4,&numberwidth)
-  bnext
-  call assert_equal(8,&numberwidth)
-  bw!
-
-  " Test value is not copied if window already has seen the buffer
-  enew
-  split
-  setlocal numberwidth=9
-  bnext
-  setlocal numberwidth=10
-  wincmd w
-  call assert_equal(4,&numberwidth)
-  bnext
-  call assert_equal(4,&numberwidth)
-  bw!
-
-  set hidden&
-endfunc
-
-def Test_split_copy_options()
-  var values = [
-    ['cursorbind', true, false],
-    ['fillchars', '"vert:-"', '"' .. &fillchars .. '"'],
-    ['list', true, 0],
-    ['listchars', '"space:-"', '"' .. &listchars .. '"'],
-    ['number', true, 0],
-    ['relativenumber', true, false],
-    ['scrollbind', true, false],
-    ['smoothscroll', true, false],
-    ['virtualedit', '"block"', '"' .. &virtualedit .. '"'],
-    ['wincolor', '"Search"', '"' .. &wincolor .. '"'],
-    ['wrap', false, true],
-  ]
-  if has('linebreak')
-    values += [
-      ['breakindent', true, false],
-      ['breakindentopt', '"min:5"', '"' .. &breakindentopt .. '"'],
-      ['linebreak', true, false],
-      ['numberwidth', 7, 4],
-      ['showbreak', '"++"', '"' .. &showbreak .. '"'],
-    ]
-  endif
-  if has('rightleft')
-    values += [
-      ['rightleft', true, false],
-      ['rightleftcmd', '"search"', '"' .. &rightleftcmd .. '"'],
-    ]
-  endif
-  if has('statusline')
-    values += [
-      ['statusline', '"---%f---"', '"' .. &statusline .. '"'],
-    ]
-  endif
-  if has('spell')
-    values += [
-      ['spell', true, false],
-    ]
-  endif
-  if has('syntax')
-    values += [
-      ['cursorcolumn', true, false],
-      ['cursorline', true, false],
-      ['cursorlineopt', '"screenline"', '"' .. &cursorlineopt .. '"'],
-      ['colorcolumn', '"+1"', '"' .. &colorcolumn .. '"'],
-    ]
-  endif
-  if has('diff')
-    values += [
-      ['diff', true, false],
-    ]
-  endif
-  if has('conceal')
-    values += [
-      ['concealcursor', '"nv"', '"' .. &concealcursor .. '"'],
-      ['conceallevel', '3', &conceallevel],
-    ]
-  endif
-  if has('terminal')
-    values += [
-      ['termwinkey', '"<C-X>"', '"' .. &termwinkey .. '"'],
-      ['termwinsize', '"10x20"', '"' .. &termwinsize .. '"'],
-    ]
-  endif
-  if has('folding')
-    values += [
-      ['foldcolumn', 5,  &foldcolumn],
-      ['foldenable', false, true],
-      ['foldexpr', '"2 + 3"', '"' .. &foldexpr .. '"'],
-      ['foldignore', '"+="', '"' .. &foldignore .. '"'],
-      ['foldlevel', 4,  &foldlevel],
-      ['foldmarker', '">>,<<"', '"' .. &foldmarker .. '"'],
-      ['foldmethod', '"marker"', '"' .. &foldmethod .. '"'],
-      ['foldminlines', 3,  &foldminlines],
-      ['foldnestmax', 17,  &foldnestmax],
-      ['foldtext', '"closed"', '"' .. &foldtext .. '"'],
-    ]
-  endif
-  if has('signs')
-    values += [
-      ['signcolumn', '"number"', '"' .. &signcolumn .. '"'],
-    ]
-  endif
-
-  # set options to non-default value
-  for item in values
-    exe $'&l:{item[0]} = {item[1]}'
-  endfor
-
-  # check values are set in new window
-  split
-  for item in values
-    exe $'assert_equal({item[1]}, &{item[0]}, "{item[0]}")'
-  endfor
-
-  # restore
-  close
-  for item in values
-    exe $'&l:{item[0]} = {item[2]}'
-  endfor
-enddef
-
-func Test_shortmess_F()
-  new
-  call assert_match('\[No Name\]', execute('file'))
-  set shortmess+=F
-  call assert_match('\[No Name\]', execute('file'))
-  call assert_match('^\s*$', execute('file foo'))
-  call assert_match('foo', execute('file'))
-  set shortmess-=F
-  call assert_match('bar', execute('file bar'))
-  call assert_match('bar', execute('file'))
-  set shortmess&
-  bwipe
-endfunc
-
-func Test_shortmess_F2()
-  e file1
-  e file2
-  call assert_match('file1', execute('bn', ''))
-  call assert_match('file2', execute('bn', ''))
-  set shortmess+=F
-  call assert_true(empty(execute('bn', '')))
-  call assert_false(test_getvalue('need_fileinfo'))
-  call assert_true(empty(execute('bn', '')))
-  call assert_false('need_fileinfo'->test_getvalue())
-  set hidden
-  call assert_true(empty(execute('bn', '')))
-  call assert_false(test_getvalue('need_fileinfo'))
-  call assert_true(empty(execute('bn', '')))
-  call assert_false(test_getvalue('need_fileinfo'))
-  set nohidden
-  call assert_true(empty(execute('bn', '')))
-  call assert_false(test_getvalue('need_fileinfo'))
-  call assert_true(empty(execute('bn', '')))
-  call assert_false(test_getvalue('need_fileinfo'))
-  set shortmess&
-  call assert_match('file1', execute('bn', ''))
-  call assert_match('file2', execute('bn', ''))
-  bwipe
-  bwipe
-  call assert_fails('call test_getvalue("abc")', 'E475:')
-endfunc
-
-func Test_local_scrolloff()
-  set so=5
-  set siso=7
-  split
-  call assert_equal(5, &so)
-  setlocal so=3
-  call assert_equal(3, &so)
-  wincmd w
-  call assert_equal(5, &so)
-  wincmd w
-  setlocal so<
-  call assert_equal(5, &so)
-  setlocal so=0
-  call assert_equal(0, &so)
-  setlocal so=-1
-  call assert_equal(5, &so)
-
-  call assert_equal(7, &siso)
-  setlocal siso=3
-  call assert_equal(3, &siso)
-  wincmd w
-  call assert_equal(7, &siso)
-  wincmd w
-  setlocal siso<
-  call assert_equal(7, &siso)
-  setlocal siso=0
-  call assert_equal(0, &siso)
-  setlocal siso=-1
-  call assert_equal(7, &siso)
-
-  close
-  set so&
-  set siso&
-endfunc
-
-func Test_writedelay()
-  CheckFunction reltimefloat
-
-  new
-  call setline(1, 'empty')
-  redraw
-  set writedelay=10
-  let start = reltime()
-  call setline(1, repeat('x', 70))
-  redraw
-  let elapsed = reltimefloat(reltime(start))
-  set writedelay=0
-  " With 'writedelay' set should take at least 30 * 10 msec
-  call assert_inrange(30 * 0.01, 999.0, elapsed)
-
-  bwipe!
-endfunc
-
-func Test_visualbell()
-  set belloff=
-  set visualbell
-  call assert_beeps('normal 0h')
-  set novisualbell
-  set belloff=all
-endfunc
-
-" Test for the 'write' option
-func Test_write()
-  new
-  call setline(1, ['L1'])
-  set nowrite
-  call assert_fails('write Xwrfile', 'E142:')
-  set write
-  close!
-endfunc
-
-" Test for 'buftype' option
-func Test_buftype()
-  new
-  call setline(1, ['L1'])
-  set buftype=nowrite
-  call assert_fails('write', 'E382:')
-
-  for val in ['', 'nofile', 'nowrite', 'acwrite', 'quickfix', 'help', 'terminal', 'prompt', 'popup']
-    exe 'set buftype=' .. val
-    call writefile(['something'], 'XBuftype', 'D')
-    call assert_fails('write XBuftype', 'E13:', 'with buftype=' .. val)
-  endfor
-
-  bwipe!
-endfunc
-
-" Test for the 'rightleftcmd' option
-func Test_rightleftcmd()
-  CheckFeature rightleft
-  set rightleft
-
-  let g:l = []
-  func AddPos()
-    call add(g:l, screencol())
-    return ''
-  endfunc
-  cmap <expr> <F2> AddPos()
-
-  set rightleftcmd=
-  call feedkeys("/\<F2>abc\<Right>\<F2>\<Left>\<Left>\<F2>" ..
-        \ "\<Right>\<F2>\<Esc>", 'xt')
-  call assert_equal([2, 5, 3, 4], g:l)
-
-  let g:l = []
-  set rightleftcmd=search
-  call feedkeys("/\<F2>abc\<Left>\<F2>\<Right>\<Right>\<F2>" ..
-        \ "\<Left>\<F2>\<Esc>", 'xt')
-  call assert_equal([&co - 1, &co - 4, &co - 2, &co - 3], g:l)
-
-  cunmap <F2>
-  unlet g:l
-  set rightleftcmd&
-  set rightleft&
-endfunc
-
-" Test for the 'debug' option
-func Test_debug_option()
-  " redraw to avoid matching previous messages
-  redraw
-  set debug=beep
-  exe "normal \<C-c>"
-  call assert_equal('Beep!', Screenline(&lines))
-  call assert_equal('line    4:', Screenline(&lines - 1))
-  " also check a line above, with a certain window width the colon is there
-  call assert_match('Test_debug_option:$',
-        \ Screenline(&lines - 3) .. Screenline(&lines - 2))
-  set debug&
-endfunc
-
-" Test for the default CDPATH option
-func Test_opt_default_cdpath()
-  let after =<< trim [CODE]
-    call assert_equal(',/path/to/dir1,/path/to/dir2', &cdpath)
-    call writefile(v:errors, 'Xtestout')
-    qall
-  [CODE]
-  if has('unix')
-    let $CDPATH='/path/to/dir1:/path/to/dir2'
-  else
-    let $CDPATH='/path/to/dir1;/path/to/dir2'
-  endif
-  if RunVim([], after, '')
-    call assert_equal([], readfile('Xtestout'))
-    call delete('Xtestout')
-  endif
-endfunc
-
-" Test for setting keycodes using set
-func Test_opt_set_keycode()
-  call assert_fails('set <t_k1=l', 'E474:')
-  call assert_fails('set <Home=l', 'E474:')
-  set <t_k9>=abcd
-  call assert_equal('abcd', &t_k9)
-  set <t_k9>&
-  set <F9>=xyz
-  call assert_equal('xyz', &t_k9)
-  set <t_k9>&
-
-  " should we test all of them?
-  set t_Ce=testCe
-  set t_Cs=testCs
-  set t_Us=testUs
-  set t_ds=testds
-  set t_Ds=testDs
-  call assert_equal('testCe', &t_Ce)
-  call assert_equal('testCs', &t_Cs)
-  call assert_equal('testUs', &t_Us)
-  call assert_equal('testds', &t_ds)
-  call assert_equal('testDs', &t_Ds)
-endfunc
-
-" Test for changing options in a sandbox
-func Test_opt_sandbox()
-  for opt in ['backupdir', 'cdpath', 'exrc']
-    call assert_fails('sandbox set ' .. opt .. '?', 'E48:')
-    call assert_fails('sandbox let &' .. opt .. ' = 1', 'E48:')
-  endfor
-  call assert_fails('sandbox let &modelineexpr = 1', 'E48:')
-endfunc
-
-" Test for setting an option with local value to global value
-func Test_opt_local_to_global()
-  setglobal equalprg=gprg
-  setlocal equalprg=lprg
-  call assert_equal('gprg', &g:equalprg)
-  call assert_equal('lprg', &l:equalprg)
-  call assert_equal('lprg', &equalprg)
-  set equalprg<
-  call assert_equal('', &l:equalprg)
-  call assert_equal('gprg', &equalprg)
-  setglobal equalprg=gnewprg
-  setlocal equalprg=lnewprg
-  setlocal equalprg<
-  call assert_equal('gnewprg', &l:equalprg)
-  call assert_equal('gnewprg', &equalprg)
-  set equalprg&
-
-  " Test for setting the global/local value of a boolean option
-  setglobal autoread
-  setlocal noautoread
-  call assert_false(&autoread)
-  set autoread<
-  call assert_true(&autoread)
-  setglobal noautoread
-  setlocal autoread
-  setlocal autoread<
-  call assert_false(&autoread)
-  set autoread&
-endfunc
-
-func Test_set_in_sandbox()
-  " Some boolean options cannot be set in sandbox, some can.
-  call assert_fails('sandbox set modelineexpr', 'E48:')
-  sandbox set number
-  call assert_true(&number)
-  set number&
-
-  " Some boolean options cannot be set in sandbox, some can.
-  if has('python') || has('python3')
-    call assert_fails('sandbox set pyxversion=3', 'E48:')
-  endif
-  sandbox set tabstop=4
-  call assert_equal(4, &tabstop)
-  set tabstop&
-
-  " Some string options cannot be set in sandbox, some can.
-  call assert_fails('sandbox set backupdir=/tmp', 'E48:')
-  sandbox set filetype=perl
-  call assert_equal('perl', &filetype)
-  set filetype&
-endfunc
-
-" Test for incrementing, decrementing and multiplying a number option value
-func Test_opt_num_op()
-  set shiftwidth=4
-  set sw+=2
-  call assert_equal(6, &sw)
-  set sw-=2
-  call assert_equal(4, &sw)
-  set sw^=2
-  call assert_equal(8, &sw)
-  set shiftwidth&
-endfunc
-
-" Test for setting option values using v:false and v:true
-func Test_opt_boolean()
-  set number&
-  set number
-  call assert_equal(1, &nu)
-  set nonu
-  call assert_equal(0, &nu)
-  let &nu = v:true
-  call assert_equal(1, &nu)
-  let &nu = v:false
-  call assert_equal(0, &nu)
-  set number&
-endfunc
-
-" Test for the 'window' option
-func Test_window_opt()
-  " Needs only one open widow
-  %bw!
-  call setline(1, range(1, 8))
-  set window=5
-  exe "normal \<C-F>"
-  call assert_equal(4, line('w0'))
-  exe "normal \<C-F>"
-  call assert_equal(7, line('w0'))
-  exe "normal \<C-F>"
-  call assert_equal(8, line('w0'))
-  exe "normal \<C-B>"
-  call assert_equal(5, line('w0'))
-  exe "normal \<C-B>"
-  call assert_equal(2, line('w0'))
-  exe "normal \<C-B>"
-  call assert_equal(1, line('w0'))
-  set window=1
-  exe "normal gg\<C-F>"
-  call assert_equal(2, line('w0'))
-  exe "normal \<C-F>"
-  call assert_equal(3, line('w0'))
-  exe "normal \<C-B>"
-  call assert_equal(2, line('w0'))
-  exe "normal \<C-B>"
-  call assert_equal(1, line('w0'))
-  enew!
-  set window&
-endfunc
-
-" Test for the 'winminheight' option
-func Test_opt_winminheight()
-  only!
-  let &winheight = &lines + 4
-  call assert_fails('let &winminheight = &lines + 2', 'E36:')
-  call assert_true(&winminheight <= &lines)
-  set winminheight&
-  set winheight&
-endfunc
-
-func Test_opt_winminheight_term()
-  CheckRunVimInTerminal
-
-  " The tabline should be taken into account.
-  let lines =<< trim END
-    set wmh=0 stal=2
-    below sp | wincmd _
-    below sp | wincmd _
-    below sp | wincmd _
-    below sp
-  END
-  call writefile(lines, 'Xwinminheight', 'D')
-  let buf = RunVimInTerminal('-S Xwinminheight', #{rows: 11})
-  call term_sendkeys(buf, ":set wmh=1\n")
-  call WaitForAssert({-> assert_match('E36: Not enough room', term_getline(buf, 11))})
-
-  call StopVimInTerminal(buf)
-endfunc
-
-func Test_opt_winminheight_term_tabs()
-  CheckRunVimInTerminal
-
-  " The tabline should be taken into account.
-  let lines =<< trim END
-    set wmh=0 stal=2
-    split
-    split
-    split
-    split
-    tabnew
-  END
-  call writefile(lines, 'Xwinminheight', 'D')
-  let buf = RunVimInTerminal('-S Xwinminheight', #{rows: 11})
-  call term_sendkeys(buf, ":set wmh=1\n")
-  call WaitForAssert({-> assert_match('E36: Not enough room', term_getline(buf, 11))})
-
-  call StopVimInTerminal(buf)
-endfunc
-
-" Test for the 'winminwidth' option
-func Test_opt_winminwidth()
-  only!
-  let &winwidth = &columns + 4
-  call assert_fails('let &winminwidth = &columns + 2', 'E36:')
-  call assert_true(&winminwidth <= &columns)
-  set winminwidth&
-  set winwidth&
-endfunc
-
-" Test for setting option value containing spaces with isfname+=32
-func Test_isfname_with_options()
-  set isfname+=32
-  setlocal keywordprg=:term\ help.exe
-  call assert_equal(':term help.exe', &keywordprg)
-  set isfname&
-  setlocal keywordprg&
-endfunc
-
-" Test that resetting laststatus does change scroll option
-func Test_opt_reset_scroll()
-  CheckRunVimInTerminal
-  let vimrc =<< trim [CODE]
-    set scroll=2
-    set laststatus=2
-  [CODE]
-  call writefile(vimrc, 'Xscroll', 'D')
-  let buf = RunVimInTerminal('-S Xscroll', {'rows': 16, 'cols': 45})
-  call term_sendkeys(buf, ":verbose set scroll?\n")
-  call WaitForAssert({-> assert_match('Last set.*window size', term_getline(buf, 15))})
-  call assert_match('^\s*scroll=7$', term_getline(buf, 14))
-
-  " clean up
-  call StopVimInTerminal(buf)
-endfunc
-
-" Check that VIM_POSIX env variable influences default value of 'cpo' and 'shm'
-func Test_VIM_POSIX()
-  let saved_VIM_POSIX = getenv("VIM_POSIX")
-
-  call setenv('VIM_POSIX', "1")
-  let after =<< trim [CODE]
-    call writefile([&cpo, &shm], 'X_VIM_POSIX')
-    qall
-  [CODE]
-  if RunVim([], after, '')
-    call assert_equal(['aAbBcCdDeEfFgHiIjJkKlLmMnoOpPqrRsStuvwWxXyZ$!%*-+<>#{|&/\.;',
-          \            'AS'], readfile('X_VIM_POSIX'))
-  endif
-
-  call setenv('VIM_POSIX', v:null)
-  let after =<< trim [CODE]
-    call writefile([&cpo, &shm], 'X_VIM_POSIX')
-    qall
-  [CODE]
-  if RunVim([], after, '')
-    call assert_equal(['aAbBcCdDeEfFgHiIjJkKlLmMnoOpPqrRsStuvwWxXyZ$!%*-+<>;',
-          \            'S'], readfile('X_VIM_POSIX'))
-  endif
-
-  call delete('X_VIM_POSIX')
-  call setenv('VIM_POSIX', saved_VIM_POSIX)
-endfunc
-
-" Test for setting an option to a Vi or Vim default
-func Test_opt_default()
-  set formatoptions&vi
-  call assert_equal('vt', &formatoptions)
-  set formatoptions&vim
-  call assert_equal('tcq', &formatoptions)
-
-  call assert_equal('ucs-bom,utf-8,default,latin1', &fencs)
-  set fencs=latin1
-  set fencs&
-  call assert_equal('ucs-bom,utf-8,default,latin1', &fencs)
-  set fencs=latin1
-  set all&
-  call assert_equal('ucs-bom,utf-8,default,latin1', &fencs)
-endfunc
-
-" Test for the 'cmdheight' option
-func Test_cmdheight()
-  %bw!
-  let ht = &lines
-  set cmdheight=9999
-  call assert_equal(1, winheight(0))
-  call assert_equal(ht - 1, &cmdheight)
-  set cmdheight&
-endfunc
-
-" To specify a control character as an option value, '^' can be used
-func Test_opt_control_char()
-  set wildchar=^v
-  call assert_equal("\<C-V>", nr2char(&wildchar))
-  set wildcharm=^r
-  call assert_equal("\<C-R>", nr2char(&wildcharm))
-  " Bug: This doesn't work for the 'cedit' and 'termwinkey' options
-  set wildchar& wildcharm&
-endfunc
-
-" Test for the 'errorbells' option
-func Test_opt_errorbells()
-  set errorbells
-  call assert_beeps('s/a1b2/x1y2/')
-  set noerrorbells
-endfunc
-
-func Test_opt_scrolljump()
-  help
-  resize 10
-
-  " Test with positive 'scrolljump'.
-  set scrolljump=2
-  norm! Lj
-  call assert_equal({'lnum':11, 'leftcol':0, 'col':0, 'topfill':0,
-        \            'topline':3, 'coladd':0, 'skipcol':0, 'curswant':0},
-        \           winsaveview())
-
-  " Test with negative 'scrolljump' (percentage of window height).
-  set scrolljump=-40
-  norm! ggLj
-  call assert_equal({'lnum':11, 'leftcol':0, 'col':0, 'topfill':0,
-         \            'topline':5, 'coladd':0, 'skipcol':0, 'curswant':0},
-         \           winsaveview())
-
-  set scrolljump&
-  bw
-endfunc
-
-" Test for the 'cdhome' option
-func Test_opt_cdhome()
-  if has('unix') || has('vms')
-    throw 'Skipped: only works on non-Unix'
-  endif
-
-  set cdhome&
-  call assert_equal(0, &cdhome)
-  set cdhome
-
-  " This paragraph is copied from Test_cd_no_arg().
-  let path = getcwd()
-  cd
-  call assert_equal($HOME, getcwd())
-  call assert_notequal(path, getcwd())
-  exe 'cd ' .. fnameescape(path)
-  call assert_equal(path, getcwd())
-
-  set cdhome&
-endfunc
-
-func Test_set_completion_2()
-  CheckOption termguicolors
-
-  " Test default option completion
-  set wildoptions=
-  call feedkeys(":set termg\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set termguicolors', @:)
-
-  call feedkeys(":set notermg\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set notermguicolors', @:)
-
-  " Test fuzzy option completion
-  set wildoptions=fuzzy
-  call feedkeys(":set termg\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set termguicolors termencoding', @:)
-
-  call feedkeys(":set notermg\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"set notermguicolors', @:)
-
-  set wildoptions=
-endfunc
-
-func Test_switchbuf_reset()
-  set switchbuf=useopen
-  sblast
-  call assert_equal(1, winnr('$'))
-  set all&
-  call assert_equal('', &switchbuf)
-  sblast
-  call assert_equal(2, winnr('$'))
-  only!
-endfunc
-
-" :set empty string for global 'keywordprg' falls back to ":help"
-func Test_keywordprg_empty()
-  let k = &keywordprg
-  set keywordprg=man
-  call assert_equal('man', &keywordprg)
-  set keywordprg=
-  call assert_equal(':help', &keywordprg)
-  set keywordprg=man
-  call assert_equal('man', &keywordprg)
-  call assert_equal("\n  keywordprg=:help", execute('set kp= kp?'))
-  let &keywordprg = k
-endfunc
-
-" check that the very first buffer created does not have 'endoffile' set
-func Test_endoffile_default()
-  let after =<< trim [CODE]
-    call writefile([execute('set eof?')], 'Xtestout')
-    qall!
-  [CODE]
-  if RunVim([], after, '')
-    call assert_equal(["\nnoendoffile"], readfile('Xtestout'))
-  endif
-  call delete('Xtestout')
-endfunc
-
-" Test for setting the 'lines' and 'columns' options to a minimum value
-func Test_set_min_lines_columns()
-  let save_lines = &lines
-  let save_columns = &columns
-
-  let after =<< trim END
-    set nomore
-    let msg = []
-    let v:errmsg = ''
-    silent! let &columns=0
-    call add(msg, v:errmsg)
-    silent! set columns=0
-    call add(msg, v:errmsg)
-    silent! call setbufvar('', '&columns', 0)
-    call add(msg, v:errmsg)
-    "call writefile(msg, 'XResultsetminlines')
-    silent! let &lines=0
-    call add(msg, v:errmsg)
-    silent! set lines=0
-    call add(msg, v:errmsg)
-    silent! call setbufvar('', '&lines', 0)
-    call add(msg, v:errmsg)
-    call writefile(msg, 'XResultsetminlines')
-    qall!
-  END
-  if RunVim([], after, '')
-    call assert_equal(['E594: Need at least 12 columns',
-          \ 'E594: Need at least 12 columns: columns=0',
-          \ 'E594: Need at least 12 columns',
-          \ 'E593: Need at least 2 lines',
-          \ 'E593: Need at least 2 lines: lines=0',
-          \ 'E593: Need at least 2 lines',], readfile('XResultsetminlines'))
-  endif
-
-  call delete('XResultsetminlines')
-  let &lines = save_lines
-  let &columns = save_columns
-endfunc
-
-" Test for reverting a string option value if the new value is invalid.
-func Test_string_option_revert_on_failure()
-  new
-  let optlist = [
-        \ ['ambiwidth', 'double', 'a123'],
-        \ ['background', 'dark', 'a123'],
-        \ ['backspace', 'eol', 'a123'],
-        \ ['backupcopy', 'no', 'a123'],
-        \ ['belloff', 'showmatch', 'a123'],
-        \ ['breakindentopt', 'min:10', 'list'],
-        \ ['bufhidden', 'wipe', 'a123'],
-        \ ['buftype', 'nowrite', 'a123'],
-        \ ['casemap', 'keepascii', 'a123'],
-        \ ['cedit', "\<C-Y>", 'z'],
-        \ ['colorcolumn', '10', 'z'],
-        \ ['commentstring', '#%s', 'a123'],
-        \ ['complete', '.,t', 'a'],
-        \ ['completefunc', 'MyCmplFunc', '1a-'],
-        \ ['completeopt', 'popup', 'a123'],
-        \ ['completepopup', 'width:20', 'border'],
-        \ ['concealcursor', 'v', 'xyz'],
-        \ ['cpoptions', 'HJ', '~'],
-        \ ['cryptmethod', 'zip', 'a123'],
-        \ ['cursorlineopt', 'screenline', 'a123'],
-        \ ['debug', 'throw', 'a123'],
-        \ ['diffopt', 'iwhite', 'a123'],
-        \ ['display', 'uhex', 'a123'],
-        \ ['eadirection', 'hor', 'a123'],
-        \ ['encoding', 'utf-8', 'a123'],
-        \ ['eventignore', 'TextYankPost', 'a123'],
-        \ ['fileencoding', 'utf-8', 'a123,'],
-        \ ['fileformat', 'mac', 'a123'],
-        \ ['fileformats', 'mac', 'a123'],
-        \ ['filetype', 'abc', 'a^b'],
-        \ ['fillchars', 'diff:~', 'a123'],
-        \ ['foldclose', 'all', 'a123'],
-        \ ['foldmarker', '[[[,]]]', '[[['],
-        \ ['foldmethod', 'marker', 'a123'],
-        \ ['foldopen', 'percent', 'a123'],
-        \ ['formatoptions', 'an', '*'],
-        \ ['guicursor', 'n-v-c:block-Cursor/lCursor', 'n-v-c'],
-        \ ['helplang', 'en', 'a'],
-        \ ['highlight', '!:CursorColumn', '8:'],
-        \ ['keymodel', 'stopsel', 'a123'],
-        \ ['keyprotocol', 'kitty:kitty', 'kitty:'],
-        \ ['lispoptions', 'expr:1', 'a123'],
-        \ ['listchars', 'tab:->', 'tab:'],
-        \ ['matchpairs', '<:>', '<:'],
-        \ ['mkspellmem', '100000,1000,100', '100000'],
-        \ ['mouse', 'nvi', 'z'],
-        \ ['mousemodel', 'extend', 'a123'],
-        \ ['nrformats', 'alpha', 'a123'],
-        \ ['omnifunc', 'MyOmniFunc', '1a-'],
-        \ ['operatorfunc', 'MyOpFunc', '1a-'],
-        \ ['previewpopup', 'width:20', 'a123'],
-        \ ['printoptions', 'paper:A4', 'a123:'],
-        \ ['quickfixtextfunc', 'MyQfFunc', '1a-'],
-        \ ['rulerformat', '%l', '%['],
-        \ ['scrollopt', 'hor,jump', 'a123'],
-        \ ['selection', 'exclusive', 'a123'],
-        \ ['selectmode', 'cmd', 'a123'],
-        \ ['sessionoptions', 'options', 'a123'],
-        \ ['shortmess', 'w', '2'],
-        \ ['showbreak', '>>', "\x01"],
-        \ ['showcmdloc', 'statusline', 'a123'],
-        \ ['signcolumn', 'no', 'a123'],
-        \ ['spellcapcheck', '[.?!]\+', '%\{'],
-        \ ['spellfile', 'MySpell.en.add', "\x01"],
-        \ ['spelllang', 'en', "#"],
-        \ ['spelloptions', 'camel', 'a123'],
-        \ ['spellsuggest', 'double', 'a123'],
-        \ ['splitkeep', 'topline', 'a123'],
-        \ ['statusline', '%f', '%['],
-        \ ['swapsync', 'sync', 'a123'],
-        \ ['switchbuf', 'usetab', 'a123'],
-        \ ['syntax', 'abc', 'a^b'],
-        \ ['tabline', '%f', '%['],
-        \ ['tagcase', 'ignore', 'a123'],
-        \ ['tagfunc', 'MyTagFunc', '1a-'],
-        \ ['thesaurusfunc', 'MyThesaurusFunc', '1a-'],
-        \ ['viewoptions', 'options', 'a123'],
-        \ ['virtualedit', 'onemore', 'a123'],
-        \ ['whichwrap', '<,>', '{,}'],
-        \ ['wildmode', 'list', 'a123'],
-        \ ['wildoptions', 'pum', 'a123']
-        \ ]
-  if has('gui')
-    call add(optlist, ['browsedir', 'buffer', 'a123'])
-  endif
-  if has('clipboard_working')
-    call add(optlist, ['clipboard', 'unnamed', 'a123'])
-  endif
-  if has('win32')
-    call add(optlist, ['completeslash', 'slash', 'a123'])
-  endif
-  if has('cscope')
-    call add(optlist, ['cscopequickfix', 't-', 'z-'])
-  endif
-  if !has('win32')
-    call add(optlist, ['imactivatefunc', 'MyActFunc', '1a-'])
-    call add(optlist, ['imstatusfunc', 'MyStatusFunc', '1a-'])
-  endif
-  if has('keymap')
-    call add(optlist, ['keymap', 'greek', '[]'])
-  endif
-  if has('mouseshape')
-    call add(optlist, ['mouseshape', 'm:no', 'a123:'])
-  endif
-  if has('win32') && has('gui')
-    call add(optlist, ['renderoptions', 'type:directx', 'type:directx,a123'])
-  endif
-  if has('rightleft')
-    call add(optlist, ['rightleftcmd', 'search', 'a123'])
-  endif
-  if has('terminal')
-    call add(optlist, ['termwinkey', '<C-L>', '<C'])
-    call add(optlist, ['termwinsize', '24x80', '100'])
-  endif
-  if has('win32') && has('terminal')
-    call add(optlist, ['termwintype', 'winpty', 'a123'])
-  endif
-  if exists('+toolbar')
-    call add(optlist, ['toolbar', 'text', 'a123'])
-  endif
-  if exists('+toolbariconsize')
-    call add(optlist, ['toolbariconsize', 'medium', 'a123'])
-  endif
-  if exists('+ttymouse') && !has('gui')
-    call add(optlist, ['ttymouse', 'xterm', 'a123'])
-  endif
-  if exists('+vartabs')
-    call add(optlist, ['varsofttabstop', '12', 'a123'])
-    call add(optlist, ['vartabstop', '4,20', '4,'])
-  endif
-  if exists('+winaltkeys')
-    call add(optlist, ['winaltkeys', 'no', 'a123'])
-  endif
-  for opt in optlist
-    exe $"let save_opt = &{opt[0]}"
-    try
-      exe $"let &{opt[0]} = '{opt[1]}'"
-    catch
-      call assert_report($"Caught {v:exception} with {opt->string()}")
-    endtry
-    call assert_fails($"let &{opt[0]} = '{opt[2]}'", '', opt[0])
-    call assert_equal(opt[1], eval($"&{opt[0]}"), opt[0])
-    exe $"let &{opt[0]} = save_opt"
-  endfor
-  bw!
-endfunc
-
-" vim: shiftwidth=2 sts=2 expandtab
+" Test for options
+
+source shared.vim
+source check.vim
+source view_util.vim
+
+func Test_whichwrap()
+  set whichwrap=b,s
+  call assert_equal('b,s', &whichwrap)
+
+  set whichwrap+=h,l
+  call assert_equal('b,s,h,l', &whichwrap)
+
+  set whichwrap+=h,l
+  call assert_equal('b,s,h,l', &whichwrap)
+
+  set whichwrap+=h,l
+  call assert_equal('b,s,h,l', &whichwrap)
+
+  set whichwrap=h,h
+  call assert_equal('h', &whichwrap)
+
+  set whichwrap=h,h,h
+  call assert_equal('h', &whichwrap)
+
+  " For compatibility with Vim 3.0 and before, number values are also
+  " supported for 'whichwrap'
+  set whichwrap=1
+  call assert_equal('b', &whichwrap)
+  set whichwrap=2
+  call assert_equal('s', &whichwrap)
+  set whichwrap=4
+  call assert_equal('h,l', &whichwrap)
+  set whichwrap=8
+  call assert_equal('<,>', &whichwrap)
+  set whichwrap=16
+  call assert_equal('[,]', &whichwrap)
+  set whichwrap=31
+  call assert_equal('b,s,h,l,<,>,[,]', &whichwrap)
+
+  set whichwrap&
+endfunc
+
+func Test_isfname()
+  " This used to cause Vim to access uninitialized memory.
+  set isfname=
+  call assert_equal("~X", expand("~X"))
+  set isfname&
+  " Test for setting 'isfname' to an unsupported character
+  let save_isfname = &isfname
+  call assert_fails('exe $"set isfname+={"\u1234"}"', 'E474:')
+  call assert_equal(save_isfname, &isfname)
+endfunc
+
+" Test for getting the value of 'pastetoggle'
+func Test_pastetoggle()
+  " character with K_SPECIAL byte
+  let &pastetoggle = '…'
+  call assert_equal('…', &pastetoggle)
+  call assert_equal("\n  pastetoggle=…", execute('set pastetoggle?'))
+
+  " modified character with K_SPECIAL byte
+  let &pastetoggle = '<M-…>'
+  call assert_equal('<M-…>', &pastetoggle)
+  call assert_equal("\n  pastetoggle=<M-…>", execute('set pastetoggle?'))
+
+  " illegal bytes
+  let str = ":\x7f:\x80:\x90:\xd0:"
+  let &pastetoggle = str
+  call assert_equal(str, &pastetoggle)
+  call assert_equal("\n  pastetoggle=" .. strtrans(str), execute('set pastetoggle?'))
+
+  unlet str
+  set pastetoggle&
+endfunc
+
+func Test_wildchar()
+  " Empty 'wildchar' used to access invalid memory.
+  call assert_fails('set wildchar=', 'E521:')
+  call assert_fails('set wildchar=abc', 'E521:')
+  set wildchar=<Esc>
+  let a=execute('set wildchar?')
+  call assert_equal("\n  wildchar=<Esc>", a)
+  set wildchar=27
+  let a=execute('set wildchar?')
+  call assert_equal("\n  wildchar=<Esc>", a)
+  set wildchar&
+endfunc
+
+func Test_wildoptions()
+  set wildoptions=
+  set wildoptions+=tagfile
+  set wildoptions+=tagfile
+  call assert_equal('tagfile', &wildoptions)
+endfunc
+
+func Test_options_command()
+  let caught = 'ok'
+  try
+    options
+  catch
+    let caught = v:throwpoint . "\n" . v:exception
+  endtry
+  call assert_equal('ok', caught)
+
+  " Check if the option-window is opened horizontally.
+  wincmd j
+  call assert_notequal('option-window', bufname(''))
+  wincmd k
+  call assert_equal('option-window', bufname(''))
+  " close option-window
+  close
+
+  " Open the option-window vertically.
+  vert options
+  " Check if the option-window is opened vertically.
+  wincmd l
+  call assert_notequal('option-window', bufname(''))
+  wincmd h
+  call assert_equal('option-window', bufname(''))
+  " close option-window
+  close
+
+  " Open the option-window at the top.
+  set splitbelow
+  topleft options
+  call assert_equal(1, winnr())
+  close
+
+  " Open the option-window at the bottom.
+  set nosplitbelow
+  botright options
+  call assert_equal(winnr('$'), winnr())
+  close
+  set splitbelow&
+
+  " Open the option-window in a new tab.
+  tab options
+  " Check if the option-window is opened in a tab.
+  normal gT
+  call assert_notequal('option-window', bufname(''))
+  normal gt
+  call assert_equal('option-window', bufname(''))
+  " close option-window
+  close
+
+  " Open the options window browse
+  if has('browse')
+    browse set
+    call assert_equal('option-window', bufname(''))
+    close
+  endif
+endfunc
+
+func Test_path_keep_commas()
+  " Test that changing 'path' keeps two commas.
+  set path=foo,,bar
+  set path-=bar
+  set path+=bar
+  call assert_equal('foo,,bar', &path)
+
+  set path&
+endfunc
+
+func Test_path_too_long()
+  exe 'set path=' .. repeat('x', 10000)
+  call assert_fails('find x', 'E854:')
+  set path&
+endfunc
+
+func Test_signcolumn()
+  CheckFeature signs
+  call assert_equal("auto", &signcolumn)
+  set signcolumn=yes
+  set signcolumn=no
+  call assert_fails('set signcolumn=nope')
+endfunc
+
+func Test_filetype_valid()
+  set ft=valid_name
+  call assert_equal("valid_name", &filetype)
+  set ft=valid-name
+  call assert_equal("valid-name", &filetype)
+
+  call assert_fails(":set ft=wrong;name", "E474:")
+  call assert_fails(":set ft=wrong\\\\name", "E474:")
+  call assert_fails(":set ft=wrong\\|name", "E474:")
+  call assert_fails(":set ft=wrong/name", "E474:")
+  call assert_fails(":set ft=wrong\\\nname", "E474:")
+  call assert_equal("valid-name", &filetype)
+
+  exe "set ft=trunc\x00name"
+  call assert_equal("trunc", &filetype)
+endfunc
+
+func Test_syntax_valid()
+  CheckFeature syntax
+  set syn=valid_name
+  call assert_equal("valid_name", &syntax)
+  set syn=valid-name
+  call assert_equal("valid-name", &syntax)
+
+  call assert_fails(":set syn=wrong;name", "E474:")
+  call assert_fails(":set syn=wrong\\\\name", "E474:")
+  call assert_fails(":set syn=wrong\\|name", "E474:")
+  call assert_fails(":set syn=wrong/name", "E474:")
+  call assert_fails(":set syn=wrong\\\nname", "E474:")
+  call assert_equal("valid-name", &syntax)
+
+  exe "set syn=trunc\x00name"
+  call assert_equal("trunc", &syntax)
+endfunc
+
+func Test_keymap_valid()
+  CheckFeature keymap
+  call assert_fails(":set kmp=valid_name", "E544:")
+  call assert_fails(":set kmp=valid_name", "valid_name")
+  call assert_fails(":set kmp=valid-name", "E544:")
+  call assert_fails(":set kmp=valid-name", "valid-name")
+
+  call assert_fails(":set kmp=wrong;name", "E474:")
+  call assert_fails(":set kmp=wrong\\\\name", "E474:")
+  call assert_fails(":set kmp=wrong\\|name", "E474:")
+  call assert_fails(":set kmp=wrong/name", "E474:")
+  call assert_fails(":set kmp=wrong\\\nname", "E474:")
+
+  call assert_fails(":set kmp=trunc\x00name", "E544:")
+  call assert_fails(":set kmp=trunc\x00name", "trunc")
+endfunc
+
+func Check_dir_option(name)
+  " Check that it's possible to set the option.
+  exe 'set ' . a:name . '=/usr/share/dict/words'
+  call assert_equal('/usr/share/dict/words', eval('&' . a:name))
+  exe 'set ' . a:name . '=/usr/share/dict/words,/and/there'
+  call assert_equal('/usr/share/dict/words,/and/there', eval('&' . a:name))
+  exe 'set ' . a:name . '=/usr/share/dict\ words'
+  call assert_equal('/usr/share/dict words', eval('&' . a:name))
+
+  " Check rejecting weird characters.
+  call assert_fails("set " . a:name . "=/not&there", "E474:")
+  call assert_fails("set " . a:name . "=/not>there", "E474:")
+  call assert_fails("set " . a:name . "=/not.*there", "E474:")
+endfunc
+
+func Test_cinkeys()
+  " This used to cause invalid memory access
+  set cindent cinkeys=0
+  norm a
+  set cindent& cinkeys&
+endfunc
+
+func Test_dictionary()
+  call Check_dir_option('dictionary')
+endfunc
+
+func Test_thesaurus()
+  call Check_dir_option('thesaurus')
+endfun
+
+func Test_complete()
+  " Trailing single backslash used to cause invalid memory access.
+  set complete=s\
+  new
+  call feedkeys("i\<C-N>\<Esc>", 'xt')
+  bwipe!
+  call assert_fails('set complete=ix', 'E535:')
+  set complete&
+endfun
+
+func Test_set_completion()
+  call feedkeys(":set di\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set dictionary diff diffexpr diffopt digraph directory display', @:)
+
+  call feedkeys(":setlocal di\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"setlocal dictionary diff diffexpr diffopt digraph directory display', @:)
+
+  call feedkeys(":setglobal di\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"setglobal dictionary diff diffexpr diffopt digraph directory display', @:)
+
+  " Expand boolean options. When doing :set no<Tab> Vim prefixes the option
+  " names with "no".
+  call feedkeys(":set nodi\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set nodiff nodigraph', @:)
+
+  call feedkeys(":set invdi\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set invdiff invdigraph', @:)
+
+  " Expanding "set noinv" does nothing.
+  call feedkeys(":set noinv\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set noinv', @:)
+
+  " Expand abbreviation of options.
+  call feedkeys(":set ts\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set tabstop thesaurus thesaurusfunc ttyscroll', @:)
+
+  " Expand current value
+  call feedkeys(":set fileencodings=\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set fileencodings=ucs-bom,utf-8,default,latin1', @:)
+
+  call feedkeys(":set fileencodings:\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set fileencodings:ucs-bom,utf-8,default,latin1', @:)
+
+  " Expand key codes.
+  call feedkeys(":set <H\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set <Help> <Home>', @:)
+
+  " Expand terminal options.
+  call feedkeys(":set t_A\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set t_AB t_AF t_AU t_AL', @:)
+  call assert_fails('call feedkeys(":set <t_afoo>=\<C-A>\<CR>", "xt")', 'E474:')
+
+  " Expand directories.
+  call feedkeys(":set cdpath=./\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_match(' ./samples/ ', @:)
+  call assert_notmatch(' ./summarize.vim ', @:)
+
+  " Expand files and directories.
+  call feedkeys(":set tags=./\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_match(' ./samples/.* ./summarize.vim', @:)
+
+  call feedkeys(":set tags=./\\\\ dif\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set tags=./\\ diff diffexpr diffopt', @:)
+  set tags&
+
+  " Expanding the option names
+  call feedkeys(":set \<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"set all', @:)
+
+  " Expanding a second set of option names
+  call feedkeys(":set wrapscan \<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"set wrapscan all', @:)
+
+  " Expanding a special keycode
+  call feedkeys(":set <Home>\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"set <Home>', @:)
+
+  " Expanding an invalid special keycode
+  call feedkeys(":set <abcd>\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"set <abcd>\<Tab>", @:)
+
+  " Expanding a terminal keycode
+  call feedkeys(":set t_AB\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"set t_AB", @:)
+
+  " Expanding an invalid option name
+  call feedkeys(":set abcde=\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"set abcde=\<Tab>", @:)
+
+  " Expanding after a = for a boolean option
+  call feedkeys(":set wrapscan=\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"set wrapscan=\<Tab>", @:)
+
+  " Expanding a numeric option
+  call feedkeys(":set tabstop+=\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"set tabstop+=" .. &tabstop, @:)
+
+  " Expanding a non-boolean option
+  call feedkeys(":set invtabstop=\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"set invtabstop=", @:)
+
+  " Expand options for 'spellsuggest'
+  call feedkeys(":set spellsuggest=best,file:xyz\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"set spellsuggest=best,file:xyz", @:)
+
+  " Expand value for 'key'
+  set key=abcd
+  call feedkeys(":set key=\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"set key=*****', @:)
+  set key=
+
+  " Expand values for 'filetype'
+  call feedkeys(":set filetype=sshdconfi\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"set filetype=sshdconfig', @:)
+  call feedkeys(":set filetype=a\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"set filetype=' .. getcompletion('a*', 'filetype')->join(), @:)
+endfunc
+
+func Test_set_option_errors()
+  call assert_fails('set scroll=-1', 'E49:')
+  call assert_fails('set backupcopy=', 'E474:')
+  call assert_fails('set regexpengine=3', 'E474:')
+  call assert_fails('set history=10001', 'E474:')
+  call assert_fails('set numberwidth=21', 'E474:')
+  call assert_fails('set colorcolumn=-a', 'E474:')
+  call assert_fails('set colorcolumn=a', 'E474:')
+  call assert_fails('set colorcolumn=1,', 'E474:')
+  call assert_fails('set colorcolumn=1;', 'E474:')
+  call assert_fails('set cmdheight=-1', 'E487:')
+  call assert_fails('set cmdwinheight=-1', 'E487:')
+  if has('conceal')
+    call assert_fails('set conceallevel=-1', 'E487:')
+    call assert_fails('set conceallevel=4', 'E474:')
+  endif
+  call assert_fails('set helpheight=-1', 'E487:')
+  call assert_fails('set history=-1', 'E487:')
+  call assert_fails('set report=-1', 'E487:')
+  call assert_fails('set shiftwidth=-1', 'E487:')
+  call assert_fails('set sidescroll=-1', 'E487:')
+  call assert_fails('set tabstop=-1', 'E487:')
+  call assert_fails('set tabstop=10000', 'E474:')
+  call assert_fails('let &tabstop = 10000', 'E474:')
+  call assert_fails('set tabstop=5500000000', 'E474:')
+  call assert_fails('set textwidth=-1', 'E487:')
+  call assert_fails('set timeoutlen=-1', 'E487:')
+  call assert_fails('set updatecount=-1', 'E487:')
+  call assert_fails('set updatetime=-1', 'E487:')
+  call assert_fails('set winheight=-1', 'E487:')
+  call assert_fails('set tabstop!', 'E488:')
+  call assert_fails('set xxx', 'E518:')
+  call assert_fails('set beautify?', 'E519:')
+  call assert_fails('set undolevels=x', 'E521:')
+  call assert_fails('set tabstop=', 'E521:')
+  call assert_fails('set comments=-', 'E524:')
+  call assert_fails('set comments=a', 'E525:')
+  call assert_fails('set foldmarker=x', 'E536:')
+  call assert_fails('set commentstring=x', 'E537:')
+  call assert_fails('let &commentstring = "x"', 'E537:')
+  call assert_fails('set complete=x', 'E539:')
+  call assert_fails('set rulerformat=%-', 'E539:')
+  call assert_fails('set rulerformat=%(', 'E542:')
+  call assert_fails('set rulerformat=%15(%%', 'E542:')
+  call assert_fails('set statusline=%$', 'E539:')
+  call assert_fails('set statusline=%{', 'E540:')
+  call assert_fails('set statusline=%{%', 'E540:')
+  call assert_fails('set statusline=%{%}', 'E539:')
+  call assert_fails('set statusline=%(', 'E542:')
+  call assert_fails('set statusline=%)', 'E542:')
+  call assert_fails('set tabline=%$', 'E539:')
+  call assert_fails('set tabline=%{', 'E540:')
+  call assert_fails('set tabline=%{%', 'E540:')
+  call assert_fails('set tabline=%{%}', 'E539:')
+  call assert_fails('set tabline=%(', 'E542:')
+  call assert_fails('set tabline=%)', 'E542:')
+
+  if has('cursorshape')
+    " This invalid value for 'guicursor' used to cause Vim to crash.
+    call assert_fails('set guicursor=i-ci,r-cr:h', 'E545:')
+    call assert_fails('set guicursor=i-ci', 'E545:')
+    call assert_fails('set guicursor=x', 'E545:')
+    call assert_fails('set guicursor=x:', 'E546:')
+    call assert_fails('set guicursor=r-cr:horx', 'E548:')
+    call assert_fails('set guicursor=r-cr:hor0', 'E549:')
+  endif
+  if has('mouseshape')
+    call assert_fails('se mouseshape=i-r:x', 'E547:')
+  endif
+
+  " Test for 'backupext' and 'patchmode' set to the same value
+  set backupext=.bak
+  set patchmode=.patch
+  call assert_fails('set patchmode=.bak', 'E589:')
+  call assert_equal('.patch', &patchmode)
+  call assert_fails('set backupext=.patch', 'E589:')
+  call assert_equal('.bak', &backupext)
+  set backupext& patchmode&
+
+  call assert_fails('set winminheight=10 winheight=9', 'E591:')
+  set winminheight& winheight&
+  set winheight=10 winminheight=10
+  call assert_fails('set winheight=9', 'E591:')
+  set winminheight& winheight&
+  call assert_fails('set winminwidth=10 winwidth=9', 'E592:')
+  set winminwidth& winwidth&
+  call assert_fails('set winwidth=9 winminwidth=10', 'E592:')
+  set winwidth& winminwidth&
+  call assert_fails("set showbreak=\x01", 'E595:')
+  call assert_fails('set t_foo=', 'E846:')
+  call assert_fails('set tabstop??', 'E488:')
+  call assert_fails('set wrapscan!!', 'E488:')
+  call assert_fails('set tabstop&&', 'E488:')
+  call assert_fails('set wrapscan<<', 'E488:')
+  call assert_fails('set wrapscan=1', 'E474:')
+  call assert_fails('set autoindent@', 'E488:')
+  call assert_fails('set wildchar=<abc>', 'E474:')
+  call assert_fails('set cmdheight=1a', 'E521:')
+  call assert_fails('set invcmdheight', 'E474:')
+  if has('python') || has('python3')
+    call assert_fails('set pyxversion=6', 'E474:')
+  endif
+  call assert_fails("let &tabstop='ab'", ['E521:', 'E521:'])
+  call assert_fails('set spellcapcheck=%\\(', 'E54:')
+  call assert_fails('set sessionoptions=curdir,sesdir', 'E474:')
+  call assert_fails('set foldmarker={{{,', 'E474:')
+  call assert_fails('set sessionoptions=sesdir,curdir', 'E474:')
+  setlocal listchars=trail:·
+  call assert_fails('set ambiwidth=double', 'E834:')
+  setlocal listchars=trail:-
+  setglobal listchars=trail:·
+  call assert_fails('set ambiwidth=double', 'E834:')
+  set listchars&
+  setlocal fillchars=stl:·
+  call assert_fails('set ambiwidth=double', 'E835:')
+  setlocal fillchars=stl:-
+  setglobal fillchars=stl:·
+  call assert_fails('set ambiwidth=double', 'E835:')
+  set fillchars&
+  call assert_fails('set fileencoding=latin1,utf-8', 'E474:')
+  set nomodifiable
+  call assert_fails('set fileencoding=latin1', 'E21:')
+  set modifiable&
+  call assert_fails('set t_#-&', 'E522:')
+  call assert_fails('let &formatoptions = "?"', 'E539:')
+  call assert_fails('call setbufvar("", "&formatoptions", "?")', 'E539:')
+  call assert_fails('call setwinvar(0, "&scrolloff", [])', ['E745:', 'E745:'])
+  call assert_fails('call setwinvar(0, "&list", [])', ['E745:', 'E745:'])
+  call assert_fails('call setwinvar(0, "&listchars", [])', ['E730:', 'E730:'])
+  call assert_fails('call setwinvar(0, "&nosuchoption", 0)', ['E355:', 'E355:'])
+  call assert_fails('call setwinvar(0, "&nosuchoption", "")', ['E355:', 'E355:'])
+  call assert_fails('call setwinvar(0, "&nosuchoption", [])', ['E355:', 'E355:'])
+endfunc
+
+func Test_set_encoding()
+  let save_encoding = &encoding
+
+  set enc=iso8859-1
+  call assert_equal('latin1', &enc)
+  set enc=iso8859_1
+  call assert_equal('latin1', &enc)
+  set enc=iso-8859-1
+  call assert_equal('latin1', &enc)
+  set enc=iso_8859_1
+  call assert_equal('latin1', &enc)
+  set enc=iso88591
+  call assert_equal('latin1', &enc)
+  set enc=iso8859
+  call assert_equal('latin1', &enc)
+  set enc=iso-8859
+  call assert_equal('latin1', &enc)
+  set enc=iso_8859
+  call assert_equal('latin1', &enc)
+  call assert_fails('set enc=iso8858', 'E474:')
+  call assert_equal('latin1', &enc)
+
+  let &encoding = save_encoding
+endfunc
+
+func CheckWasSet(name)
+  let verb_cm = execute('verbose set ' .. a:name .. '?')
+  call assert_match('Last set from.*test_options.vim', verb_cm)
+endfunc
+func CheckWasNotSet(name)
+  let verb_cm = execute('verbose set ' .. a:name .. '?')
+  call assert_notmatch('Last set from', verb_cm)
+endfunc
+
+" Must be executed before other tests that set 'term'.
+func Test_000_term_option_verbose()
+  CheckNotGui
+
+  call CheckWasNotSet('t_cm')
+
+  let term_save = &term
+  set term=ansi
+  call CheckWasSet('t_cm')
+  let &term = term_save
+endfunc
+
+func Test_copy_context()
+  setlocal list
+  call CheckWasSet('list')
+  split
+  call CheckWasSet('list')
+  quit
+  setlocal nolist
+
+  set ai
+  call CheckWasSet('ai')
+  set filetype=perl
+  call CheckWasSet('filetype')
+  set fo=tcroq
+  call CheckWasSet('fo')
+
+  split Xsomebuf
+  call CheckWasSet('ai')
+  call CheckWasNotSet('filetype')
+  call CheckWasSet('fo')
+endfunc
+
+func Test_set_ttytype()
+  CheckUnix
+  CheckNotGui
+
+  " Setting 'ttytype' used to cause a double-free when exiting vim and
+  " when vim is compiled with -DEXITFREE.
+  set ttytype=ansi
+  call assert_equal('ansi', &ttytype)
+  call assert_equal(&ttytype, &term)
+  set ttytype=xterm
+  call assert_equal('xterm', &ttytype)
+  call assert_equal(&ttytype, &term)
+  try
+    set ttytype=
+    call assert_report('set ttytype= did not fail')
+  catch /E529/
+  endtry
+
+  " Some systems accept any terminal name and return dumb settings,
+  " check for failure of finding the entry and for missing 'cm' entry.
+  try
+    set ttytype=xxx
+    call assert_report('set ttytype=xxx did not fail')
+  catch /E522\|E437/
+  endtry
+
+  set ttytype&
+  call assert_equal(&ttytype, &term)
+
+  if has('gui') && !has('gui_running')
+    call assert_fails('set term=gui', 'E531:')
+  endif
+endfunc
+
+func Test_set_all()
+  set tw=75
+  set iskeyword=a-z,A-Z
+  set nosplitbelow
+  let out = execute('set all')
+  call assert_match('textwidth=75', out)
+  call assert_match('iskeyword=a-z,A-Z', out)
+  call assert_match('nosplitbelow', out)
+  set tw& iskeyword& splitbelow&
+endfunc
+
+func Test_set_one_column()
+  let out_mult = execute('set all')->split("\n")
+  let out_one = execute('set! all')->split("\n")
+  call assert_true(len(out_mult) < len(out_one))
+endfunc
+
+func Test_set_values()
+  " opt_test.vim is generated from ../optiondefs.h using gen_opt_test.vim
+  if filereadable('opt_test.vim')
+    source opt_test.vim
+  else
+    throw 'Skipped: opt_test.vim does not exist'
+  endif
+endfunc
+
+func Test_renderoptions()
+  " Only do this for Windows Vista and later, fails on Windows XP and earlier.
+  " Doesn't hurt to do this on a non-Windows system.
+  if windowsversion() !~ '^[345]\.'
+    set renderoptions=type:directx
+    set rop=type:directx
+  endif
+endfunc
+
+func ResetIndentexpr()
+  set indentexpr=
+endfunc
+
+func Test_set_indentexpr()
+  " this was causing usage of freed memory
+  set indentexpr=ResetIndentexpr()
+  new
+  call feedkeys("i\<c-f>", 'x')
+  call assert_equal('', &indentexpr)
+  bwipe!
+endfunc
+
+func Test_backupskip()
+  " Option 'backupskip' may contain several comma-separated path
+  " specifications if one or more of the environment variables TMPDIR, TMP,
+  " or TEMP is defined.  To simplify testing, convert the string value into a
+  " list.
+  let bsklist = split(&bsk, ',')
+
+  if has("mac")
+    let found = (index(bsklist, '/private/tmp/*') >= 0)
+    call assert_true(found, '/private/tmp not in option bsk: ' . &bsk)
+  elseif has("unix")
+    let found = (index(bsklist, '/tmp/*') >= 0)
+    call assert_true(found, '/tmp not in option bsk: ' . &bsk)
+  endif
+
+  " If our test platform is Windows, the path(s) in option bsk will use
+  " backslash for the path separator and the components could be in short
+  " (8.3) format.  As such, we need to replace the backslashes with forward
+  " slashes and convert the path components to long format.  The expand()
+  " function will do this but it cannot handle comma-separated paths.  This is
+  " why bsk was converted from a string into a list of strings above.
+  "
+  " One final complication is that the wildcard "/*" is at the end of each
+  " path and so expand() might return a list of matching files.  To prevent
+  " this, we need to remove the wildcard before calling expand() and then
+  " append it afterwards.
+  if has('win32')
+    let item_nbr = 0
+    while item_nbr < len(bsklist)
+      let path_spec = bsklist[item_nbr]
+      let path_spec = strcharpart(path_spec, 0, strlen(path_spec)-2)
+      let path_spec = substitute(expand(path_spec), '\\', '/', 'g')
+      let bsklist[item_nbr] = path_spec . '/*'
+      let item_nbr += 1
+    endwhile
+  endif
+
+  " Option bsk will also include these environment variables if defined.
+  " If they're defined, verify they appear in the option value.
+  for var in  ['$TMPDIR', '$TMP', '$TEMP']
+    if exists(var)
+      let varvalue = substitute(expand(var), '\\', '/', 'g')
+      let varvalue = substitute(varvalue, '/$', '', '')
+      let varvalue .= '/*'
+      let found = (index(bsklist, varvalue) >= 0)
+      call assert_true(found, var . ' (' . varvalue . ') not in option bsk: ' . &bsk)
+    endif
+  endfor
+
+  " Duplicates from environment variables should be filtered out (option has
+  " P_NODUP).  Run this in a separate instance and write v:errors in a file,
+  " so that we see what happens on startup.
+  let after =<< trim [CODE]
+      let bsklist = split(&backupskip, ',')
+      call assert_equal(uniq(copy(bsklist)), bsklist)
+      call writefile(['errors:'] + v:errors, 'Xtestout')
+      qall
+  [CODE]
+  call writefile(after, 'Xafter', 'D')
+  let cmd = GetVimProg() . ' --not-a-term -S Xafter --cmd "set enc=utf8"'
+
+  let saveenv = {}
+  for var in ['TMPDIR', 'TMP', 'TEMP']
+    let saveenv[var] = getenv(var)
+    call setenv(var, '/duplicate/path')
+  endfor
+
+  exe 'silent !' . cmd
+  call assert_equal(['errors:'], readfile('Xtestout'))
+
+  " restore environment variables
+  for var in ['TMPDIR', 'TMP', 'TEMP']
+    call setenv(var, saveenv[var])
+  endfor
+
+  call delete('Xtestout')
+
+  " Duplicates should be filtered out (option has P_NODUP)
+  let backupskip = &backupskip
+  set backupskip=
+  set backupskip+=/test/dir
+  set backupskip+=/other/dir
+  set backupskip+=/test/dir
+  call assert_equal('/test/dir,/other/dir', &backupskip)
+  let &backupskip = backupskip
+endfunc
+
+func Test_buf_copy_winopt()
+  set hidden
+
+  " Test copy option from current buffer in window
+  split
+  enew
+  setlocal numberwidth=5
+  wincmd w
+  call assert_equal(4,&numberwidth)
+  bnext
+  call assert_equal(5,&numberwidth)
+  bw!
+  call assert_equal(4,&numberwidth)
+
+  " Test copy value from window that used to be display the buffer
+  split
+  enew
+  setlocal numberwidth=6
+  bnext
+  wincmd w
+  call assert_equal(4,&numberwidth)
+  bnext
+  call assert_equal(6,&numberwidth)
+  bw!
+
+  " Test that if buffer is current, don't use the stale cached value
+  " from the last time the buffer was displayed.
+  split
+  enew
+  setlocal numberwidth=7
+  bnext
+  bnext
+  setlocal numberwidth=8
+  wincmd w
+  call assert_equal(4,&numberwidth)
+  bnext
+  call assert_equal(8,&numberwidth)
+  bw!
+
+  " Test value is not copied if window already has seen the buffer
+  enew
+  split
+  setlocal numberwidth=9
+  bnext
+  setlocal numberwidth=10
+  wincmd w
+  call assert_equal(4,&numberwidth)
+  bnext
+  call assert_equal(4,&numberwidth)
+  bw!
+
+  set hidden&
+endfunc
+
+def Test_split_copy_options()
+  var values = [
+    ['cursorbind', true, false],
+    ['fillchars', '"vert:-"', '"' .. &fillchars .. '"'],
+    ['list', true, 0],
+    ['listchars', '"space:-"', '"' .. &listchars .. '"'],
+    ['number', true, 0],
+    ['relativenumber', true, false],
+    ['scrollbind', true, false],
+    ['smoothscroll', true, false],
+    ['virtualedit', '"block"', '"' .. &virtualedit .. '"'],
+    ['wincolor', '"Search"', '"' .. &wincolor .. '"'],
+    ['wrap', false, true],
+  ]
+  if has('linebreak')
+    values += [
+      ['breakindent', true, false],
+      ['breakindentopt', '"min:5"', '"' .. &breakindentopt .. '"'],
+      ['linebreak', true, false],
+      ['numberwidth', 7, 4],
+      ['showbreak', '"++"', '"' .. &showbreak .. '"'],
+    ]
+  endif
+  if has('rightleft')
+    values += [
+      ['rightleft', true, false],
+      ['rightleftcmd', '"search"', '"' .. &rightleftcmd .. '"'],
+    ]
+  endif
+  if has('statusline')
+    values += [
+      ['statusline', '"---%f---"', '"' .. &statusline .. '"'],
+    ]
+  endif
+  if has('spell')
+    values += [
+      ['spell', true, false],
+    ]
+  endif
+  if has('syntax')
+    values += [
+      ['cursorcolumn', true, false],
+      ['cursorline', true, false],
+      ['cursorlineopt', '"screenline"', '"' .. &cursorlineopt .. '"'],
+      ['colorcolumn', '"+1"', '"' .. &colorcolumn .. '"'],
+    ]
+  endif
+  if has('diff')
+    values += [
+      ['diff', true, false],
+    ]
+  endif
+  if has('conceal')
+    values += [
+      ['concealcursor', '"nv"', '"' .. &concealcursor .. '"'],
+      ['conceallevel', '3', &conceallevel],
+    ]
+  endif
+  if has('terminal')
+    values += [
+      ['termwinkey', '"<C-X>"', '"' .. &termwinkey .. '"'],
+      ['termwinsize', '"10x20"', '"' .. &termwinsize .. '"'],
+    ]
+  endif
+  if has('folding')
+    values += [
+      ['foldcolumn', 5,  &foldcolumn],
+      ['foldenable', false, true],
+      ['foldexpr', '"2 + 3"', '"' .. &foldexpr .. '"'],
+      ['foldignore', '"+="', '"' .. &foldignore .. '"'],
+      ['foldlevel', 4,  &foldlevel],
+      ['foldmarker', '">>,<<"', '"' .. &foldmarker .. '"'],
+      ['foldmethod', '"marker"', '"' .. &foldmethod .. '"'],
+      ['foldminlines', 3,  &foldminlines],
+      ['foldnestmax', 17,  &foldnestmax],
+      ['foldtext', '"closed"', '"' .. &foldtext .. '"'],
+    ]
+  endif
+  if has('signs')
+    values += [
+      ['signcolumn', '"number"', '"' .. &signcolumn .. '"'],
+    ]
+  endif
+
+  # set options to non-default value
+  for item in values
+    exe $'&l:{item[0]} = {item[1]}'
+  endfor
+
+  # check values are set in new window
+  split
+  for item in values
+    exe $'assert_equal({item[1]}, &{item[0]}, "{item[0]}")'
+  endfor
+
+  # restore
+  close
+  for item in values
+    exe $'&l:{item[0]} = {item[2]}'
+  endfor
+enddef
+
+func Test_shortmess_F()
+  new
+  call assert_match('\[No Name\]', execute('file'))
+  set shortmess+=F
+  call assert_match('\[No Name\]', execute('file'))
+  call assert_match('^\s*$', execute('file foo'))
+  call assert_match('foo', execute('file'))
+  set shortmess-=F
+  call assert_match('bar', execute('file bar'))
+  call assert_match('bar', execute('file'))
+  set shortmess&
+  bwipe
+endfunc
+
+func Test_shortmess_F2()
+  e file1
+  e file2
+  call assert_match('file1', execute('bn', ''))
+  call assert_match('file2', execute('bn', ''))
+  set shortmess+=F
+  call assert_true(empty(execute('bn', '')))
+  call assert_false(test_getvalue('need_fileinfo'))
+  call assert_true(empty(execute('bn', '')))
+  call assert_false('need_fileinfo'->test_getvalue())
+  set hidden
+  call assert_true(empty(execute('bn', '')))
+  call assert_false(test_getvalue('need_fileinfo'))
+  call assert_true(empty(execute('bn', '')))
+  call assert_false(test_getvalue('need_fileinfo'))
+  set nohidden
+  call assert_true(empty(execute('bn', '')))
+  call assert_false(test_getvalue('need_fileinfo'))
+  call assert_true(empty(execute('bn', '')))
+  call assert_false(test_getvalue('need_fileinfo'))
+  set shortmess&
+  call assert_match('file1', execute('bn', ''))
+  call assert_match('file2', execute('bn', ''))
+  bwipe
+  bwipe
+  call assert_fails('call test_getvalue("abc")', 'E475:')
+endfunc
+
+func Test_local_scrolloff()
+  set so=5
+  set siso=7
+  split
+  call assert_equal(5, &so)
+  setlocal so=3
+  call assert_equal(3, &so)
+  wincmd w
+  call assert_equal(5, &so)
+  wincmd w
+  setlocal so<
+  call assert_equal(5, &so)
+  setlocal so=0
+  call assert_equal(0, &so)
+  setlocal so=-1
+  call assert_equal(5, &so)
+
+  call assert_equal(7, &siso)
+  setlocal siso=3
+  call assert_equal(3, &siso)
+  wincmd w
+  call assert_equal(7, &siso)
+  wincmd w
+  setlocal siso<
+  call assert_equal(7, &siso)
+  setlocal siso=0
+  call assert_equal(0, &siso)
+  setlocal siso=-1
+  call assert_equal(7, &siso)
+
+  close
+  set so&
+  set siso&
+endfunc
+
+func Test_writedelay()
+  CheckFunction reltimefloat
+
+  new
+  call setline(1, 'empty')
+  redraw
+  set writedelay=10
+  let start = reltime()
+  call setline(1, repeat('x', 70))
+  redraw
+  let elapsed = reltimefloat(reltime(start))
+  set writedelay=0
+  " With 'writedelay' set should take at least 30 * 10 msec
+  call assert_inrange(30 * 0.01, 999.0, elapsed)
+
+  bwipe!
+endfunc
+
+func Test_visualbell()
+  set belloff=
+  set visualbell
+  call assert_beeps('normal 0h')
+  set novisualbell
+  set belloff=all
+endfunc
+
+" Test for the 'write' option
+func Test_write()
+  new
+  call setline(1, ['L1'])
+  set nowrite
+  call assert_fails('write Xwrfile', 'E142:')
+  set write
+  close!
+endfunc
+
+" Test for 'buftype' option
+func Test_buftype()
+  new
+  call setline(1, ['L1'])
+  set buftype=nowrite
+  call assert_fails('write', 'E382:')
+
+  for val in ['', 'nofile', 'nowrite', 'acwrite', 'quickfix', 'help', 'terminal', 'prompt', 'popup']
+    exe 'set buftype=' .. val
+    call writefile(['something'], 'XBuftype', 'D')
+    call assert_fails('write XBuftype', 'E13:', 'with buftype=' .. val)
+  endfor
+
+  bwipe!
+endfunc
+
+" Test for the 'rightleftcmd' option
+func Test_rightleftcmd()
+  CheckFeature rightleft
+  set rightleft
+
+  let g:l = []
+  func AddPos()
+    call add(g:l, screencol())
+    return ''
+  endfunc
+  cmap <expr> <F2> AddPos()
+
+  set rightleftcmd=
+  call feedkeys("/\<F2>abc\<Right>\<F2>\<Left>\<Left>\<F2>" ..
+        \ "\<Right>\<F2>\<Esc>", 'xt')
+  call assert_equal([2, 5, 3, 4], g:l)
+
+  let g:l = []
+  set rightleftcmd=search
+  call feedkeys("/\<F2>abc\<Left>\<F2>\<Right>\<Right>\<F2>" ..
+        \ "\<Left>\<F2>\<Esc>", 'xt')
+  call assert_equal([&co - 1, &co - 4, &co - 2, &co - 3], g:l)
+
+  cunmap <F2>
+  unlet g:l
+  set rightleftcmd&
+  set rightleft&
+endfunc
+
+" Test for the 'debug' option
+func Test_debug_option()
+  " redraw to avoid matching previous messages
+  redraw
+  set debug=beep
+  exe "normal \<C-c>"
+  call assert_equal('Beep!', Screenline(&lines))
+  call assert_equal('line    4:', Screenline(&lines - 1))
+  " also check a line above, with a certain window width the colon is there
+  call assert_match('Test_debug_option:$',
+        \ Screenline(&lines - 3) .. Screenline(&lines - 2))
+  set debug&
+endfunc
+
+" Test for the default CDPATH option
+func Test_opt_default_cdpath()
+  let after =<< trim [CODE]
+    call assert_equal(',/path/to/dir1,/path/to/dir2', &cdpath)
+    call writefile(v:errors, 'Xtestout')
+    qall
+  [CODE]
+  if has('unix')
+    let $CDPATH='/path/to/dir1:/path/to/dir2'
+  else
+    let $CDPATH='/path/to/dir1;/path/to/dir2'
+  endif
+  if RunVim([], after, '')
+    call assert_equal([], readfile('Xtestout'))
+    call delete('Xtestout')
+  endif
+endfunc
+
+" Test for setting keycodes using set
+func Test_opt_set_keycode()
+  call assert_fails('set <t_k1=l', 'E474:')
+  call assert_fails('set <Home=l', 'E474:')
+  set <t_k9>=abcd
+  call assert_equal('abcd', &t_k9)
+  set <t_k9>&
+  set <F9>=xyz
+  call assert_equal('xyz', &t_k9)
+  set <t_k9>&
+
+  " should we test all of them?
+  set t_Ce=testCe
+  set t_Cs=testCs
+  set t_Us=testUs
+  set t_ds=testds
+  set t_Ds=testDs
+  call assert_equal('testCe', &t_Ce)
+  call assert_equal('testCs', &t_Cs)
+  call assert_equal('testUs', &t_Us)
+  call assert_equal('testds', &t_ds)
+  call assert_equal('testDs', &t_Ds)
+endfunc
+
+" Test for changing options in a sandbox
+func Test_opt_sandbox()
+  for opt in ['backupdir', 'cdpath', 'exrc']
+    call assert_fails('sandbox set ' .. opt .. '?', 'E48:')
+    call assert_fails('sandbox let &' .. opt .. ' = 1', 'E48:')
+  endfor
+  call assert_fails('sandbox let &modelineexpr = 1', 'E48:')
+endfunc
+
+" Test for setting an option with local value to global value
+func Test_opt_local_to_global()
+  setglobal equalprg=gprg
+  setlocal equalprg=lprg
+  call assert_equal('gprg', &g:equalprg)
+  call assert_equal('lprg', &l:equalprg)
+  call assert_equal('lprg', &equalprg)
+  set equalprg<
+  call assert_equal('', &l:equalprg)
+  call assert_equal('gprg', &equalprg)
+  setglobal equalprg=gnewprg
+  setlocal equalprg=lnewprg
+  setlocal equalprg<
+  call assert_equal('gnewprg', &l:equalprg)
+  call assert_equal('gnewprg', &equalprg)
+  set equalprg&
+
+  " Test for setting the global/local value of a boolean option
+  setglobal autoread
+  setlocal noautoread
+  call assert_false(&autoread)
+  set autoread<
+  call assert_true(&autoread)
+  setglobal noautoread
+  setlocal autoread
+  setlocal autoread<
+  call assert_false(&autoread)
+  set autoread&
+endfunc
+
+func Test_set_in_sandbox()
+  " Some boolean options cannot be set in sandbox, some can.
+  call assert_fails('sandbox set modelineexpr', 'E48:')
+  sandbox set number
+  call assert_true(&number)
+  set number&
+
+  " Some boolean options cannot be set in sandbox, some can.
+  if has('python') || has('python3')
+    call assert_fails('sandbox set pyxversion=3', 'E48:')
+  endif
+  sandbox set tabstop=4
+  call assert_equal(4, &tabstop)
+  set tabstop&
+
+  " Some string options cannot be set in sandbox, some can.
+  call assert_fails('sandbox set backupdir=/tmp', 'E48:')
+  sandbox set filetype=perl
+  call assert_equal('perl', &filetype)
+  set filetype&
+endfunc
+
+" Test for incrementing, decrementing and multiplying a number option value
+func Test_opt_num_op()
+  set shiftwidth=4
+  set sw+=2
+  call assert_equal(6, &sw)
+  set sw-=2
+  call assert_equal(4, &sw)
+  set sw^=2
+  call assert_equal(8, &sw)
+  set shiftwidth&
+endfunc
+
+" Test for setting option values using v:false and v:true
+func Test_opt_boolean()
+  set number&
+  set number
+  call assert_equal(1, &nu)
+  set nonu
+  call assert_equal(0, &nu)
+  let &nu = v:true
+  call assert_equal(1, &nu)
+  let &nu = v:false
+  call assert_equal(0, &nu)
+  set number&
+endfunc
+
+" Test for the 'window' option
+func Test_window_opt()
+  " Needs only one open widow
+  %bw!
+  call setline(1, range(1, 8))
+  set window=5
+  exe "normal \<C-F>"
+  call assert_equal(4, line('w0'))
+  exe "normal \<C-F>"
+  call assert_equal(7, line('w0'))
+  exe "normal \<C-F>"
+  call assert_equal(8, line('w0'))
+  exe "normal \<C-B>"
+  call assert_equal(5, line('w0'))
+  exe "normal \<C-B>"
+  call assert_equal(2, line('w0'))
+  exe "normal \<C-B>"
+  call assert_equal(1, line('w0'))
+  set window=1
+  exe "normal gg\<C-F>"
+  call assert_equal(2, line('w0'))
+  exe "normal \<C-F>"
+  call assert_equal(3, line('w0'))
+  exe "normal \<C-B>"
+  call assert_equal(2, line('w0'))
+  exe "normal \<C-B>"
+  call assert_equal(1, line('w0'))
+  enew!
+  set window&
+endfunc
+
+" Test for the 'winminheight' option
+func Test_opt_winminheight()
+  only!
+  let &winheight = &lines + 4
+  call assert_fails('let &winminheight = &lines + 2', 'E36:')
+  call assert_true(&winminheight <= &lines)
+  set winminheight&
+  set winheight&
+endfunc
+
+func Test_opt_winminheight_term()
+  CheckRunVimInTerminal
+
+  " The tabline should be taken into account.
+  let lines =<< trim END
+    set wmh=0 stal=2
+    below sp | wincmd _
+    below sp | wincmd _
+    below sp | wincmd _
+    below sp
+  END
+  call writefile(lines, 'Xwinminheight', 'D')
+  let buf = RunVimInTerminal('-S Xwinminheight', #{rows: 11})
+  call term_sendkeys(buf, ":set wmh=1\n")
+  call WaitForAssert({-> assert_match('E36: Not enough room', term_getline(buf, 11))})
+
+  call StopVimInTerminal(buf)
+endfunc
+
+func Test_opt_winminheight_term_tabs()
+  CheckRunVimInTerminal
+
+  " The tabline should be taken into account.
+  let lines =<< trim END
+    set wmh=0 stal=2
+    split
+    split
+    split
+    split
+    tabnew
+  END
+  call writefile(lines, 'Xwinminheight', 'D')
+  let buf = RunVimInTerminal('-S Xwinminheight', #{rows: 11})
+  call term_sendkeys(buf, ":set wmh=1\n")
+  call WaitForAssert({-> assert_match('E36: Not enough room', term_getline(buf, 11))})
+
+  call StopVimInTerminal(buf)
+endfunc
+
+" Test for the 'winminwidth' option
+func Test_opt_winminwidth()
+  only!
+  let &winwidth = &columns + 4
+  call assert_fails('let &winminwidth = &columns + 2', 'E36:')
+  call assert_true(&winminwidth <= &columns)
+  set winminwidth&
+  set winwidth&
+endfunc
+
+" Test for setting option value containing spaces with isfname+=32
+func Test_isfname_with_options()
+  set isfname+=32
+  setlocal keywordprg=:term\ help.exe
+  call assert_equal(':term help.exe', &keywordprg)
+  set isfname&
+  setlocal keywordprg&
+endfunc
+
+" Test that resetting laststatus does change scroll option
+func Test_opt_reset_scroll()
+  CheckRunVimInTerminal
+  let vimrc =<< trim [CODE]
+    set scroll=2
+    set laststatus=2
+  [CODE]
+  call writefile(vimrc, 'Xscroll', 'D')
+  let buf = RunVimInTerminal('-S Xscroll', {'rows': 16, 'cols': 45})
+  call term_sendkeys(buf, ":verbose set scroll?\n")
+  call WaitForAssert({-> assert_match('Last set.*window size', term_getline(buf, 15))})
+  call assert_match('^\s*scroll=7$', term_getline(buf, 14))
+
+  " clean up
+  call StopVimInTerminal(buf)
+endfunc
+
+" Check that VIM_POSIX env variable influences default value of 'cpo' and 'shm'
+func Test_VIM_POSIX()
+  let saved_VIM_POSIX = getenv("VIM_POSIX")
+
+  call setenv('VIM_POSIX', "1")
+  let after =<< trim [CODE]
+    call writefile([&cpo, &shm], 'X_VIM_POSIX')
+    qall
+  [CODE]
+  if RunVim([], after, '')
+    call assert_equal(['aAbBcCdDeEfFgHiIjJkKlLmMnoOpPqrRsStuvwWxXyZ$!%*-+<>#{|&/\.;',
+          \            'AS'], readfile('X_VIM_POSIX'))
+  endif
+
+  call setenv('VIM_POSIX', v:null)
+  let after =<< trim [CODE]
+    call writefile([&cpo, &shm], 'X_VIM_POSIX')
+    qall
+  [CODE]
+  if RunVim([], after, '')
+    call assert_equal(['aAbBcCdDeEfFgHiIjJkKlLmMnoOpPqrRsStuvwWxXyZ$!%*-+<>;',
+          \            'S'], readfile('X_VIM_POSIX'))
+  endif
+
+  call delete('X_VIM_POSIX')
+  call setenv('VIM_POSIX', saved_VIM_POSIX)
+endfunc
+
+" Test for setting an option to a Vi or Vim default
+func Test_opt_default()
+  set formatoptions&vi
+  call assert_equal('vt', &formatoptions)
+  set formatoptions&vim
+  call assert_equal('tcq', &formatoptions)
+
+  call assert_equal('ucs-bom,utf-8,default,latin1', &fencs)
+  set fencs=latin1
+  set fencs&
+  call assert_equal('ucs-bom,utf-8,default,latin1', &fencs)
+  set fencs=latin1
+  set all&
+  call assert_equal('ucs-bom,utf-8,default,latin1', &fencs)
+endfunc
+
+" Test for the 'cmdheight' option
+func Test_cmdheight()
+  %bw!
+  let ht = &lines
+  set cmdheight=9999
+  call assert_equal(1, winheight(0))
+  call assert_equal(ht - 1, &cmdheight)
+  set cmdheight&
+endfunc
+
+" To specify a control character as an option value, '^' can be used
+func Test_opt_control_char()
+  set wildchar=^v
+  call assert_equal("\<C-V>", nr2char(&wildchar))
+  set wildcharm=^r
+  call assert_equal("\<C-R>", nr2char(&wildcharm))
+  " Bug: This doesn't work for the 'cedit' and 'termwinkey' options
+  set wildchar& wildcharm&
+endfunc
+
+" Test for the 'errorbells' option
+func Test_opt_errorbells()
+  set errorbells
+  call assert_beeps('s/a1b2/x1y2/')
+  set noerrorbells
+endfunc
+
+func Test_opt_scrolljump()
+  help
+  resize 10
+
+  " Test with positive 'scrolljump'.
+  set scrolljump=2
+  norm! Lj
+  call assert_equal({'lnum':11, 'leftcol':0, 'col':0, 'topfill':0,
+        \            'topline':3, 'coladd':0, 'skipcol':0, 'curswant':0},
+        \           winsaveview())
+
+  " Test with negative 'scrolljump' (percentage of window height).
+  set scrolljump=-40
+  norm! ggLj
+  call assert_equal({'lnum':11, 'leftcol':0, 'col':0, 'topfill':0,
+         \            'topline':5, 'coladd':0, 'skipcol':0, 'curswant':0},
+         \           winsaveview())
+
+  set scrolljump&
+  bw
+endfunc
+
+" Test for the 'cdhome' option
+func Test_opt_cdhome()
+  if has('unix') || has('vms')
+    throw 'Skipped: only works on non-Unix'
+  endif
+
+  set cdhome&
+  call assert_equal(0, &cdhome)
+  set cdhome
+
+  " This paragraph is copied from Test_cd_no_arg().
+  let path = getcwd()
+  cd
+  call assert_equal($HOME, getcwd())
+  call assert_notequal(path, getcwd())
+  exe 'cd ' .. fnameescape(path)
+  call assert_equal(path, getcwd())
+
+  set cdhome&
+endfunc
+
+func Test_set_completion_2()
+  CheckOption termguicolors
+
+  " Test default option completion
+  set wildoptions=
+  call feedkeys(":set termg\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set termguicolors', @:)
+
+  call feedkeys(":set notermg\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set notermguicolors', @:)
+
+  " Test fuzzy option completion
+  set wildoptions=fuzzy
+  call feedkeys(":set termg\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set termguicolors termencoding', @:)
+
+  call feedkeys(":set notermg\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"set notermguicolors', @:)
+
+  set wildoptions=
+endfunc
+
+func Test_switchbuf_reset()
+  set switchbuf=useopen
+  sblast
+  call assert_equal(1, winnr('$'))
+  set all&
+  call assert_equal('', &switchbuf)
+  sblast
+  call assert_equal(2, winnr('$'))
+  only!
+endfunc
+
+" :set empty string for global 'keywordprg' falls back to ":help"
+func Test_keywordprg_empty()
+  let k = &keywordprg
+  set keywordprg=man
+  call assert_equal('man', &keywordprg)
+  set keywordprg=
+  call assert_equal(':help', &keywordprg)
+  set keywordprg=man
+  call assert_equal('man', &keywordprg)
+  call assert_equal("\n  keywordprg=:help", execute('set kp= kp?'))
+  let &keywordprg = k
+endfunc
+
+" check that the very first buffer created does not have 'endoffile' set
+func Test_endoffile_default()
+  let after =<< trim [CODE]
+    call writefile([execute('set eof?')], 'Xtestout')
+    qall!
+  [CODE]
+  if RunVim([], after, '')
+    call assert_equal(["\nnoendoffile"], readfile('Xtestout'))
+  endif
+  call delete('Xtestout')
+endfunc
+
+" Test for setting the 'lines' and 'columns' options to a minimum value
+func Test_set_min_lines_columns()
+  let save_lines = &lines
+  let save_columns = &columns
+
+  let after =<< trim END
+    set nomore
+    let msg = []
+    let v:errmsg = ''
+    silent! let &columns=0
+    call add(msg, v:errmsg)
+    silent! set columns=0
+    call add(msg, v:errmsg)
+    silent! call setbufvar('', '&columns', 0)
+    call add(msg, v:errmsg)
+    "call writefile(msg, 'XResultsetminlines')
+    silent! let &lines=0
+    call add(msg, v:errmsg)
+    silent! set lines=0
+    call add(msg, v:errmsg)
+    silent! call setbufvar('', '&lines', 0)
+    call add(msg, v:errmsg)
+    call writefile(msg, 'XResultsetminlines')
+    qall!
+  END
+  if RunVim([], after, '')
+    call assert_equal(['E594: Need at least 12 columns',
+          \ 'E594: Need at least 12 columns: columns=0',
+          \ 'E594: Need at least 12 columns',
+          \ 'E593: Need at least 2 lines',
+          \ 'E593: Need at least 2 lines: lines=0',
+          \ 'E593: Need at least 2 lines',], readfile('XResultsetminlines'))
+  endif
+
+  call delete('XResultsetminlines')
+  let &lines = save_lines
+  let &columns = save_columns
+endfunc
+
+" Test for reverting a string option value if the new value is invalid.
+func Test_string_option_revert_on_failure()
+  new
+  let optlist = [
+        \ ['ambiwidth', 'double', 'a123'],
+        \ ['background', 'dark', 'a123'],
+        \ ['backspace', 'eol', 'a123'],
+        \ ['backupcopy', 'no', 'a123'],
+        \ ['belloff', 'showmatch', 'a123'],
+        \ ['breakindentopt', 'min:10', 'list'],
+        \ ['bufhidden', 'wipe', 'a123'],
+        \ ['buftype', 'nowrite', 'a123'],
+        \ ['casemap', 'keepascii', 'a123'],
+        \ ['cedit', "\<C-Y>", 'z'],
+        \ ['colorcolumn', '10', 'z'],
+        \ ['commentstring', '#%s', 'a123'],
+        \ ['complete', '.,t', 'a'],
+        \ ['completefunc', 'MyCmplFunc', '1a-'],
+        \ ['completeopt', 'popup', 'a123'],
+        \ ['completepopup', 'width:20', 'border'],
+        \ ['concealcursor', 'v', 'xyz'],
+        \ ['cpoptions', 'HJ', '~'],
+        \ ['cryptmethod', 'zip', 'a123'],
+        \ ['cursorlineopt', 'screenline', 'a123'],
+        \ ['debug', 'throw', 'a123'],
+        \ ['diffopt', 'iwhite', 'a123'],
+        \ ['display', 'uhex', 'a123'],
+        \ ['eadirection', 'hor', 'a123'],
+        \ ['encoding', 'utf-8', 'a123'],
+        \ ['eventignore', 'TextYankPost', 'a123'],
+        \ ['fileencoding', 'utf-8', 'a123,'],
+        \ ['fileformat', 'mac', 'a123'],
+        \ ['fileformats', 'mac', 'a123'],
+        \ ['filetype', 'abc', 'a^b'],
+        \ ['fillchars', 'diff:~', 'a123'],
+        \ ['foldclose', 'all', 'a123'],
+        \ ['foldmarker', '[[[,]]]', '[[['],
+        \ ['foldmethod', 'marker', 'a123'],
+        \ ['foldopen', 'percent', 'a123'],
+        \ ['formatoptions', 'an', '*'],
+        \ ['guicursor', 'n-v-c:block-Cursor/lCursor', 'n-v-c'],
+        \ ['helplang', 'en', 'a'],
+        \ ['highlight', '!:CursorColumn', '8:'],
+        \ ['keymodel', 'stopsel', 'a123'],
+        \ ['keyprotocol', 'kitty:kitty', 'kitty:'],
+        \ ['lispoptions', 'expr:1', 'a123'],
+        \ ['listchars', 'tab:->', 'tab:'],
+        \ ['matchpairs', '<:>', '<:'],
+        \ ['mkspellmem', '100000,1000,100', '100000'],
+        \ ['mouse', 'nvi', 'z'],
+        \ ['mousemodel', 'extend', 'a123'],
+        \ ['nrformats', 'alpha', 'a123'],
+        \ ['omnifunc', 'MyOmniFunc', '1a-'],
+        \ ['operatorfunc', 'MyOpFunc', '1a-'],
+        \ ['previewpopup', 'width:20', 'a123'],
+        \ ['printoptions', 'paper:A4', 'a123:'],
+        \ ['quickfixtextfunc', 'MyQfFunc', '1a-'],
+        \ ['rulerformat', '%l', '%['],
+        \ ['scrollopt', 'hor,jump', 'a123'],
+        \ ['selection', 'exclusive', 'a123'],
+        \ ['selectmode', 'cmd', 'a123'],
+        \ ['sessionoptions', 'options', 'a123'],
+        \ ['shortmess', 'w', '2'],
+        \ ['showbreak', '>>', "\x01"],
+        \ ['showcmdloc', 'statusline', 'a123'],
+        \ ['signcolumn', 'no', 'a123'],
+        \ ['spellcapcheck', '[.?!]\+', '%\{'],
+        \ ['spellfile', 'MySpell.en.add', "\x01"],
+        \ ['spelllang', 'en', "#"],
+        \ ['spelloptions', 'camel', 'a123'],
+        \ ['spellsuggest', 'double', 'a123'],
+        \ ['splitkeep', 'topline', 'a123'],
+        \ ['statusline', '%f', '%['],
+        \ ['swapsync', 'sync', 'a123'],
+        \ ['switchbuf', 'usetab', 'a123'],
+        \ ['syntax', 'abc', 'a^b'],
+        \ ['tabline', '%f', '%['],
+        \ ['tagcase', 'ignore', 'a123'],
+        \ ['tagfunc', 'MyTagFunc', '1a-'],
+        \ ['thesaurusfunc', 'MyThesaurusFunc', '1a-'],
+        \ ['viewoptions', 'options', 'a123'],
+        \ ['virtualedit', 'onemore', 'a123'],
+        \ ['whichwrap', '<,>', '{,}'],
+        \ ['wildmode', 'list', 'a123'],
+        \ ['wildoptions', 'pum', 'a123']
+        \ ]
+  if has('gui')
+    call add(optlist, ['browsedir', 'buffer', 'a123'])
+  endif
+  if has('clipboard_working')
+    call add(optlist, ['clipboard', 'unnamed', 'a123'])
+  endif
+  if has('win32')
+    call add(optlist, ['completeslash', 'slash', 'a123'])
+  endif
+  if has('cscope')
+    call add(optlist, ['cscopequickfix', 't-', 'z-'])
+  endif
+  if !has('win32')
+    call add(optlist, ['imactivatefunc', 'MyActFunc', '1a-'])
+    call add(optlist, ['imstatusfunc', 'MyStatusFunc', '1a-'])
+  endif
+  if has('keymap')
+    call add(optlist, ['keymap', 'greek', '[]'])
+  endif
+  if has('mouseshape')
+    call add(optlist, ['mouseshape', 'm:no', 'a123:'])
+  endif
+  if has('win32') && has('gui')
+    call add(optlist, ['renderoptions', 'type:directx', 'type:directx,a123'])
+  endif
+  if has('rightleft')
+    call add(optlist, ['rightleftcmd', 'search', 'a123'])
+  endif
+  if has('terminal')
+    call add(optlist, ['termwinkey', '<C-L>', '<C'])
+    call add(optlist, ['termwinsize', '24x80', '100'])
+  endif
+  if has('win32') && has('terminal')
+    call add(optlist, ['termwintype', 'winpty', 'a123'])
+  endif
+  if exists('+toolbar')
+    call add(optlist, ['toolbar', 'text', 'a123'])
+  endif
+  if exists('+toolbariconsize')
+    call add(optlist, ['toolbariconsize', 'medium', 'a123'])
+  endif
+  if exists('+ttymouse') && !has('gui')
+    call add(optlist, ['ttymouse', 'xterm', 'a123'])
+  endif
+  if exists('+vartabs')
+    call add(optlist, ['varsofttabstop', '12', 'a123'])
+    call add(optlist, ['vartabstop', '4,20', '4,'])
+  endif
+  if exists('+winaltkeys')
+    call add(optlist, ['winaltkeys', 'no', 'a123'])
+  endif
+  for opt in optlist
+    exe $"let save_opt = &{opt[0]}"
+    try
+      exe $"let &{opt[0]} = '{opt[1]}'"
+    catch
+      call assert_report($"Caught {v:exception} with {opt->string()}")
+    endtry
+    call assert_fails($"let &{opt[0]} = '{opt[2]}'", '', opt[0])
+    call assert_equal(opt[1], eval($"&{opt[0]}"), opt[0])
+    exe $"let &{opt[0]} = save_opt"
+  endfor
+  bw!
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab