Adding upstream version 2:8.1.0875.upstream/2%8.1.0875upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 612 insertions, 0 deletions

diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
new file mode 100644
index 0000000..02eeb6b
--- /dev/null
+++ b/src/testdir/test_cmdline.vim
@@ -0,0 +1,612 @@
+" Tests for editing the command line.
+
+func Test_complete_tab()
+  call writefile(['testfile'], 'Xtestfile')
+  call feedkeys(":e Xtest\t\r", "tx")
+  call assert_equal('testfile', getline(1))
+  call delete('Xtestfile')
+endfunc
+
+func Test_complete_list()
+  " We can't see the output, but at least we check the code runs properly.
+  call feedkeys(":e test\<C-D>\r", "tx")
+  call assert_equal('test', expand('%:t'))
+endfunc
+
+func Test_complete_wildmenu()
+  call writefile(['testfile1'], 'Xtestfile1')
+  call writefile(['testfile2'], 'Xtestfile2')
+  set wildmenu
+  call feedkeys(":e Xtest\t\t\r", "tx")
+  call assert_equal('testfile2', getline(1))
+
+  call delete('Xtestfile1')
+  call delete('Xtestfile2')
+  set nowildmenu
+endfunc
+
+func Test_map_completion()
+  if !has('cmdline_compl')
+    return
+  endif
+  call feedkeys(":map <unique> <si\<Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"map <unique> <silent>', getreg(':'))
+  call feedkeys(":map <script> <un\<Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"map <script> <unique>', getreg(':'))
+  call feedkeys(":map <expr> <sc\<Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"map <expr> <script>', getreg(':'))
+  call feedkeys(":map <buffer> <e\<Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"map <buffer> <expr>', getreg(':'))
+  call feedkeys(":map <nowait> <b\<Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"map <nowait> <buffer>', getreg(':'))
+  call feedkeys(":map <special> <no\<Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"map <special> <nowait>', getreg(':'))
+  call feedkeys(":map <silent> <sp\<Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"map <silent> <special>', getreg(':'))
+endfunc
+
+func Test_match_completion()
+  if !has('cmdline_compl')
+    return
+  endif
+  hi Aardig ctermfg=green
+  call feedkeys(":match \<Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"match Aardig', getreg(':'))
+  call feedkeys(":match \<S-Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"match none', getreg(':'))
+endfunc
+
+func Test_highlight_completion()
+  if !has('cmdline_compl')
+    return
+  endif
+  hi Aardig ctermfg=green
+  call feedkeys(":hi \<Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"hi Aardig', getreg(':'))
+  call feedkeys(":hi default \<Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"hi default Aardig', getreg(':'))
+  call feedkeys(":hi clear Aa\<Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"hi clear Aardig', getreg(':'))
+  call feedkeys(":hi li\<S-Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"hi link', getreg(':'))
+  call feedkeys(":hi d\<S-Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"hi default', getreg(':'))
+  call feedkeys(":hi c\<S-Tab>\<Home>\"\<CR>", 'xt')
+  call assert_equal('"hi clear', getreg(':'))
+
+  " A cleared group does not show up in completions.
+  hi Anders ctermfg=green
+  call assert_equal(['Aardig', 'Anders'], getcompletion('A', 'highlight'))
+  hi clear Aardig
+  call assert_equal(['Anders'], getcompletion('A', 'highlight'))
+  hi clear Anders
+  call assert_equal([], getcompletion('A', 'highlight'))
+endfunc
+
+func Test_expr_completion()
+  if !has('cmdline_compl')
+    return
+  endif
+  for cmd in [
+	\ 'let a = ',
+	\ 'if',
+	\ 'elseif',
+	\ 'while',
+	\ 'for',
+	\ 'echo',
+	\ 'echon',
+	\ 'execute',
+	\ 'echomsg',
+	\ 'echoerr',
+	\ 'call',
+	\ 'return',
+	\ 'cexpr',
+	\ 'caddexpr',
+	\ 'cgetexpr',
+	\ 'lexpr',
+	\ 'laddexpr',
+	\ 'lgetexpr']
+    call feedkeys(":" . cmd . " getl\<Tab>\<Home>\"\<CR>", 'xt')
+    call assert_equal('"' . cmd . ' getline(', getreg(':'))
+  endfor
+endfunc
+
+func Test_getcompletion()
+  if !has('cmdline_compl')
+    return
+  endif
+  let groupcount = len(getcompletion('', 'event'))
+  call assert_true(groupcount > 0)
+  let matchcount = len(getcompletion('File', 'event'))
+  call assert_true(matchcount > 0)
+  call assert_true(groupcount > matchcount)
+
+  if has('menu')
+    source $VIMRUNTIME/menu.vim
+    let matchcount = len(getcompletion('', 'menu'))
+    call assert_true(matchcount > 0)
+    call assert_equal(['File.'], getcompletion('File', 'menu'))
+    call assert_true(matchcount > 0)
+    let matchcount = len(getcompletion('File.', 'menu'))
+    call assert_true(matchcount > 0)
+  endif
+
+  let l = getcompletion('v:n', 'var')
+  call assert_true(index(l, 'v:null') >= 0)
+  let l = getcompletion('v:notexists', 'var')
+  call assert_equal([], l)
+
+  args a.c b.c
+  let l = getcompletion('', 'arglist')
+  call assert_equal(['a.c', 'b.c'], l)
+  %argdelete
+
+  let l = getcompletion('', 'augroup')
+  call assert_true(index(l, 'END') >= 0)
+  let l = getcompletion('blahblah', 'augroup')
+  call assert_equal([], l)
+
+  let l = getcompletion('', 'behave')
+  call assert_true(index(l, 'mswin') >= 0)
+  let l = getcompletion('not', 'behave')
+  call assert_equal([], l)
+
+  let l = getcompletion('', 'color')
+  call assert_true(index(l, 'default') >= 0)
+  let l = getcompletion('dirty', 'color')
+  call assert_equal([], l)
+
+  let l = getcompletion('', 'command')
+  call assert_true(index(l, 'sleep') >= 0)
+  let l = getcompletion('awake', 'command')
+  call assert_equal([], l)
+
+  let l = getcompletion('', 'dir')
+  call assert_true(index(l, 'samples/') >= 0)
+  let l = getcompletion('NoMatch', 'dir')
+  call assert_equal([], l)
+
+  let l = getcompletion('exe', 'expression')
+  call assert_true(index(l, 'executable(') >= 0)
+  let l = getcompletion('kill', 'expression')
+  call assert_equal([], l)
+
+  let l = getcompletion('tag', 'function')
+  call assert_true(index(l, 'taglist(') >= 0)
+  let l = getcompletion('paint', 'function')
+  call assert_equal([], l)
+
+  let Flambda = {-> 'hello'}
+  let l = getcompletion('', 'function')
+  let l = filter(l, {i, v -> v =~ 'lambda'})
+  call assert_equal([], l)
+
+  let l = getcompletion('run', 'file')
+  call assert_true(index(l, 'runtest.vim') >= 0)
+  let l = getcompletion('walk', 'file')
+  call assert_equal([], l)
+  set wildignore=*.vim
+  let l = getcompletion('run', 'file', 1)
+  call assert_true(index(l, 'runtest.vim') < 0)
+  set wildignore&
+
+  let l = getcompletion('ha', 'filetype')
+  call assert_true(index(l, 'hamster') >= 0)
+  let l = getcompletion('horse', 'filetype')
+  call assert_equal([], l)
+
+  let l = getcompletion('z', 'syntax')
+  call assert_true(index(l, 'zimbu') >= 0)
+  let l = getcompletion('emacs', 'syntax')
+  call assert_equal([], l)
+
+  let l = getcompletion('jikes', 'compiler')
+  call assert_true(index(l, 'jikes') >= 0)
+  let l = getcompletion('break', 'compiler')
+  call assert_equal([], l)
+
+  let l = getcompletion('last', 'help')
+  call assert_true(index(l, ':tablast') >= 0)
+  let l = getcompletion('giveup', 'help')
+  call assert_equal([], l)
+
+  let l = getcompletion('time', 'option')
+  call assert_true(index(l, 'timeoutlen') >= 0)
+  let l = getcompletion('space', 'option')
+  call assert_equal([], l)
+
+  let l = getcompletion('er', 'highlight')
+  call assert_true(index(l, 'ErrorMsg') >= 0)
+  let l = getcompletion('dark', 'highlight')
+  call assert_equal([], l)
+
+  let l = getcompletion('', 'messages')
+  call assert_true(index(l, 'clear') >= 0)
+  let l = getcompletion('not', 'messages')
+  call assert_equal([], l)
+
+  let l = getcompletion('', 'mapclear')
+  call assert_true(index(l, '<buffer>') >= 0)
+  let l = getcompletion('not', 'mapclear')
+  call assert_equal([], l)
+
+  let l = getcompletion('.', 'shellcmd')
+  call assert_equal(['./', '../'], filter(l, 'v:val =~ "\\./"'))
+  call assert_equal(-1, match(l[2:], '^\.\.\?/$'))
+  let root = has('win32') ? 'C:\\' : '/'
+  let l = getcompletion(root, 'shellcmd')
+  let expected = map(filter(glob(root . '*', 0, 1),
+        \ 'isdirectory(v:val) || executable(v:val)'), 'isdirectory(v:val) ? v:val . ''/'' : v:val')
+  call assert_equal(expected, l)
+
+  if has('cscope')
+    let l = getcompletion('', 'cscope')
+    let cmds = ['add', 'find', 'help', 'kill', 'reset', 'show']
+    call assert_equal(cmds, l)
+    " using cmdline completion must not change the result
+    call feedkeys(":cscope find \<c-d>\<c-c>", 'xt')
+    let l = getcompletion('', 'cscope')
+    call assert_equal(cmds, l)
+    let keys = ['a', 'c', 'd', 'e', 'f', 'g', 'i', 's', 't']
+    let l = getcompletion('find ', 'cscope')
+    call assert_equal(keys, l)
+  endif
+
+  if has('signs')
+    sign define Testing linehl=Comment
+    let l = getcompletion('', 'sign')
+    let cmds = ['define', 'jump', 'list', 'place', 'undefine', 'unplace']
+    call assert_equal(cmds, l)
+    " using cmdline completion must not change the result
+    call feedkeys(":sign list \<c-d>\<c-c>", 'xt')
+    let l = getcompletion('', 'sign')
+    call assert_equal(cmds, l)
+    let l = getcompletion('list ', 'sign')
+    call assert_equal(['Testing'], l)
+  endif
+
+  " For others test if the name is recognized.
+  let names = ['buffer', 'environment', 'file_in_path', 'mapping', 'tag', 'tag_listfiles', 'user']
+  if has('cmdline_hist')
+    call add(names, 'history')
+  endif
+  if has('gettext')
+    call add(names, 'locale')
+  endif
+  if has('profile')
+    call add(names, 'syntime')
+  endif
+
+  set tags=Xtags
+  call writefile(["!_TAG_FILE_ENCODING\tutf-8\t//", "word\tfile\tcmd"], 'Xtags')
+
+  for name in names
+    let matchcount = len(getcompletion('', name))
+    call assert_true(matchcount >= 0, 'No matches for ' . name)
+  endfor
+
+  call delete('Xtags')
+
+  call assert_fails('call getcompletion("", "burp")', 'E475:')
+endfunc
+
+func Test_shellcmd_completion()
+  let save_path = $PATH
+
+  call mkdir('Xpathdir/Xpathsubdir', 'p')
+  call writefile([''], 'Xpathdir/Xfile.exe')
+  call setfperm('Xpathdir/Xfile.exe', 'rwx------')
+
+  " Set PATH to example directory without trailing slash.
+  let $PATH = getcwd() . '/Xpathdir'
+
+  " Test for the ":!<TAB>" case.  Previously, this would include subdirs of
+  " dirs in the PATH, even though they won't be executed.  We check that only
+  " subdirs of the PWD and executables from the PATH are included in the
+  " suggestions.
+  let actual = getcompletion('X', 'shellcmd')
+  let expected = map(filter(glob('*', 0, 1), 'isdirectory(v:val) && v:val[0] == "X"'), 'v:val . "/"')
+  call insert(expected, 'Xfile.exe')
+  call assert_equal(expected, actual)
+
+  call delete('Xpathdir', 'rf')
+  let $PATH = save_path
+endfunc
+
+func Test_expand_star_star()
+  call mkdir('a/b', 'p')
+  call writefile(['asdfasdf'], 'a/b/fileXname')
+  call feedkeys(":find **/fileXname\<Tab>\<CR>", 'xt')
+  call assert_equal('find a/b/fileXname', getreg(':'))
+  bwipe!
+  call delete('a', 'rf')
+endfunc
+
+func Test_paste_in_cmdline()
+  let @a = "def"
+  call feedkeys(":abc \<C-R>a ghi\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"abc def ghi', @:)
+
+  new
+  call setline(1, 'asdf.x /tmp/some verylongword a;b-c*d ')
+
+  call feedkeys(":aaa \<C-R>\<C-W> bbb\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"aaa asdf bbb', @:)
+
+  call feedkeys("ft:aaa \<C-R>\<C-F> bbb\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"aaa /tmp/some bbb', @:)
+
+  call feedkeys(":aaa \<C-R>\<C-L> bbb\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"aaa '.getline(1).' bbb', @:)
+
+  set incsearch
+  call feedkeys("fy:aaa veryl\<C-R>\<C-W> bbb\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"aaa verylongword bbb', @:)
+
+  call feedkeys("f;:aaa \<C-R>\<C-A> bbb\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"aaa a;b-c*d bbb', @:)
+
+  call feedkeys(":\<C-\>etoupper(getline(1))\<CR>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"ASDF.X /TMP/SOME VERYLONGWORD A;B-C*D ', @:)
+  bwipe!
+
+  " Error while typing a command used to cause that it was not executed
+  " in the end.
+  new
+  try
+    call feedkeys(":file \<C-R>%Xtestfile\<CR>", 'tx')
+  catch /^Vim\%((\a\+)\)\=:E32/
+    " ignore error E32
+  endtry
+  call assert_equal("Xtestfile", bufname("%"))
+  bwipe!
+endfunc
+
+func Test_remove_char_in_cmdline()
+  call feedkeys(":abc def\<S-Left>\<Del>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"abc ef', @:)
+
+  call feedkeys(":abc def\<S-Left>\<BS>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"abcdef', @:)
+
+  call feedkeys(":abc def ghi\<S-Left>\<C-W>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"abc ghi', @:)
+
+  call feedkeys(":abc def\<S-Left>\<C-U>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"def', @:)
+endfunc
+
+func Test_illegal_address1()
+  new
+  2;'(
+  2;')
+  quit
+endfunc
+
+func Test_illegal_address2()
+  call writefile(['c', 'x', '  x', '.', '1;y'], 'Xtest.vim')
+  new
+  source Xtest.vim
+  " Trigger calling validate_cursor()
+  diffsp Xtest.vim
+  quit!
+  bwipe!
+  call delete('Xtest.vim')
+endfunc
+
+func Test_cmdline_complete_wildoptions()
+  help
+  call feedkeys(":tag /\<c-a>\<c-b>\"\<cr>", 'tx')
+  let a = join(sort(split(@:)),' ')
+  set wildoptions=tagfile
+  call feedkeys(":tag /\<c-a>\<c-b>\"\<cr>", 'tx')
+  let b = join(sort(split(@:)),' ')
+  call assert_equal(a, b)
+  bw!
+endfunc
+
+func Test_cmdline_complete_user_cmd()
+  command! -complete=color -nargs=1 Foo :
+  call feedkeys(":Foo \<Tab>\<Home>\"\<cr>", 'tx')
+  call assert_equal('"Foo blue', @:)
+  call feedkeys(":Foo b\<Tab>\<Home>\"\<cr>", 'tx')
+  call assert_equal('"Foo blue', @:)
+  delcommand Foo
+endfunc
+
+func Test_cmdline_complete_user_names()
+  if has('unix') && executable('whoami')
+    let whoami = systemlist('whoami')[0]
+    let first_letter = whoami[0]
+    if len(first_letter) > 0
+      " Trying completion of  :e ~x  where x is the first letter of
+      " the user name should complete to at least the user name.
+      call feedkeys(':e ~' . first_letter . "\<c-a>\<c-B>\"\<cr>", 'tx')
+      call assert_match('^"e \~.*\<' . whoami . '\>', @:)
+    endif
+  endif
+  if has('win32')
+    " Just in case: check that the system has an Administrator account.
+    let names = system('net user')
+    if names =~ 'Administrator'
+      " Trying completion of  :e ~A  should complete to Administrator.
+      " There could be other names starting with "A" before Administrator.
+      call feedkeys(':e ~A' . "\<c-a>\<c-B>\"\<cr>", 'tx')
+      call assert_match('^"e \~.*Administrator', @:)
+    endif
+  endif
+endfunc
+
+funct Test_cmdline_complete_languages()
+  let lang = substitute(execute('language messages'), '.*"\(.*\)"$', '\1', '')
+
+  call feedkeys(":language \<c-a>\<c-b>\"\<cr>", 'tx')
+  call assert_match('^"language .*\<ctype\>.*\<messages\>.*\<time\>', @:)
+
+  if has('unix')
+    " TODO: these tests don't work on Windows. lang appears to be 'C'
+    " but C does not appear in the completion. Why?
+    call assert_match('^"language .*\<' . lang . '\>', @:)
+
+    call feedkeys(":language messages \<c-a>\<c-b>\"\<cr>", 'tx')
+    call assert_match('^"language .*\<' . lang . '\>', @:)
+
+    call feedkeys(":language ctype \<c-a>\<c-b>\"\<cr>", 'tx')
+    call assert_match('^"language .*\<' . lang . '\>', @:)
+
+    call feedkeys(":language time \<c-a>\<c-b>\"\<cr>", 'tx')
+    call assert_match('^"language .*\<' . lang . '\>', @:)
+  endif
+endfunc
+
+func Test_cmdline_write_alternatefile()
+  new
+  call setline('.', ['one', 'two'])
+  f foo.txt
+  new
+  f #-A
+  call assert_equal('foo.txt-A', expand('%'))
+  f #<-B.txt
+  call assert_equal('foo-B.txt', expand('%'))
+  f %<
+  call assert_equal('foo-B', expand('%'))
+  new
+  call assert_fails('f #<', 'E95')
+  bw!
+  f foo-B.txt
+  f %<-A
+  call assert_equal('foo-B-A', expand('%'))
+  bw!
+  bw!
+endfunc
+
+" using a leading backslash here
+set cpo+=C
+
+func Test_cmdline_search_range()
+  new
+  call setline(1, ['a', 'b', 'c', 'd'])
+  /d
+  1,\/s/b/B/
+  call assert_equal('B', getline(2))
+
+  /a
+  $
+  \?,4s/c/C/
+  call assert_equal('C', getline(3))
+
+  call setline(1, ['a', 'b', 'c', 'd'])
+  %s/c/c/
+  1,\&s/b/B/
+  call assert_equal('B', getline(2))
+
+  bwipe!
+endfunc
+
+" Tests for getcmdline(), getcmdpos() and getcmdtype()
+func Check_cmdline(cmdtype)
+  call assert_equal('MyCmd a', getcmdline())
+  call assert_equal(8, getcmdpos())
+  call assert_equal(a:cmdtype, getcmdtype())
+  return ''
+endfunc
+
+func Test_getcmdtype()
+  call feedkeys(":MyCmd a\<C-R>=Check_cmdline(':')\<CR>\<Esc>", "xt")
+
+  let cmdtype = ''
+  debuggreedy
+  call feedkeys(":debug echo 'test'\<CR>", "t")
+  call feedkeys("let cmdtype = \<C-R>=string(getcmdtype())\<CR>\<CR>", "t")
+  call feedkeys("cont\<CR>", "xt")
+  0debuggreedy
+  call assert_equal('>', cmdtype)
+
+  call feedkeys("/MyCmd a\<C-R>=Check_cmdline('/')\<CR>\<Esc>", "xt")
+  call feedkeys("?MyCmd a\<C-R>=Check_cmdline('?')\<CR>\<Esc>", "xt")
+
+  call feedkeys(":call input('Answer?')\<CR>", "t")
+  call feedkeys("MyCmd a\<C-R>=Check_cmdline('@')\<CR>\<C-C>", "xt")
+
+  call feedkeys(":insert\<CR>MyCmd a\<C-R>=Check_cmdline('-')\<CR>\<Esc>", "xt")
+
+  cnoremap <expr> <F6> Check_cmdline('=')
+  call feedkeys("a\<C-R>=MyCmd a\<F6>\<Esc>\<Esc>", "xt")
+  cunmap <F6>
+endfunc
+
+func Test_getcmdwintype()
+  call feedkeys("q/:let a = getcmdwintype()\<CR>:q\<CR>", 'x!')
+  call assert_equal('/', a)
+
+  call feedkeys("q?:let a = getcmdwintype()\<CR>:q\<CR>", 'x!')
+  call assert_equal('?', a)
+
+  call feedkeys("q::let a = getcmdwintype()\<CR>:q\<CR>", 'x!')
+  call assert_equal(':', a)
+
+  call feedkeys(":\<C-F>:let a = getcmdwintype()\<CR>:q\<CR>", 'x!')
+  call assert_equal(':', a)
+
+  call assert_equal('', getcmdwintype())
+endfunc
+
+func Test_verbosefile()
+  set verbosefile=Xlog
+  echomsg 'foo'
+  echomsg 'bar'
+  set verbosefile=
+  let log = readfile('Xlog')
+  call assert_match("foo\nbar", join(log, "\n"))
+  call delete('Xlog')
+endfunc
+
+func Test_setcmdpos()
+  func InsertTextAtPos(text, pos)
+    call assert_equal(0, setcmdpos(a:pos))
+    return a:text
+  endfunc
+
+  " setcmdpos() with position in the middle of the command line.
+  call feedkeys(":\"12\<C-R>=InsertTextAtPos('a', 3)\<CR>b\<CR>", 'xt')
+  call assert_equal('"1ab2', @:)
+
+  call feedkeys(":\"12\<C-R>\<C-R>=InsertTextAtPos('a', 3)\<CR>b\<CR>", 'xt')
+  call assert_equal('"1b2a', @:)
+
+  " setcmdpos() with position beyond the end of the command line.
+  call feedkeys(":\"12\<C-B>\<C-R>=InsertTextAtPos('a', 10)\<CR>b\<CR>", 'xt')
+  call assert_equal('"12ab', @:)
+
+  " setcmdpos() returns 1 when not editing the command line.
+  call assert_equal(1, setcmdpos(3))
+endfunc
+
+func Test_cmdline_overstrike()
+  let encodings = ['latin1', 'utf8']
+  let encoding_save = &encoding
+
+  for e in encodings
+    exe 'set encoding=' . e
+
+    " Test overstrike in the middle of the command line.
+    call feedkeys(":\"01234\<home>\<right>\<right>ab\<right>\<insert>cd\<enter>", 'xt')
+    call assert_equal('"0ab1cd4', @:)
+
+    " Test overstrike going beyond end of command line.
+    call feedkeys(":\"01234\<home>\<right>\<right>ab\<right>\<insert>cdefgh\<enter>", 'xt')
+    call assert_equal('"0ab1cdefgh', @:)
+
+    " Test toggling insert/overstrike a few times.
+    call feedkeys(":\"01234\<home>\<right>ab\<right>\<insert>cd\<right>\<insert>ef\<enter>", 'xt')
+    call assert_equal('"ab0cd3ef4', @:)
+  endfor
+
+  " Test overstrike with multi-byte characters.
+  call feedkeys(":\"テキストエディタ\<home>\<right>\<right>ab\<right>\<insert>cd\<enter>", 'xt')
+  call assert_equal('"テabキcdエディタ', @:)
+
+  let &encoding = encoding_save
+endfunc
+
+set cpo&