" Test for the quickfix feature.

source check.vim
CheckFeature quickfix

source screendump.vim

set encoding=utf-8

func s:setup_commands(cchar)
  if a:cchar == 'c'
    command! -nargs=* -bang Xlist <mods>clist<bang> <args>
    command! -nargs=* Xgetexpr <mods>cgetexpr <args>
    command! -nargs=* Xaddexpr <mods>caddexpr <args>
    command! -nargs=* -count Xolder <mods><count>colder <args>
    command! -nargs=* Xnewer <mods>cnewer <args>
    command! -nargs=* Xopen <mods>copen <args>
    command! -nargs=* Xwindow <mods>cwindow <args>
    command! -nargs=* Xbottom <mods>cbottom <args>
    command! -nargs=* Xclose <mods>cclose <args>
    command! -nargs=* -bang Xfile <mods>cfile<bang> <args>
    command! -nargs=* Xgetfile <mods>cgetfile <args>
    command! -nargs=* Xaddfile <mods>caddfile <args>
    command! -nargs=* -bang Xbuffer <mods>cbuffer<bang> <args>
    command! -nargs=* Xgetbuffer <mods>cgetbuffer <args>
    command! -nargs=* Xaddbuffer <mods>caddbuffer <args>
    command! -nargs=* Xrewind <mods>crewind <args>
    command! -count -nargs=* -bang Xnext <mods><count>cnext<bang> <args>
    command! -count -nargs=* -bang Xprev <mods><count>cprev<bang> <args>
    command! -nargs=* -bang Xfirst <mods>cfirst<bang> <args>
    command! -nargs=* -bang Xlast <mods>clast<bang> <args>
    command! -count -nargs=* -bang Xnfile <mods><count>cnfile<bang> <args>
    command! -nargs=* -bang Xpfile <mods>cpfile<bang> <args>
    command! -nargs=* Xexpr <mods>cexpr <args>
    command! -range -nargs=* Xvimgrep <mods><count>vimgrep <args>
    command! -nargs=* Xvimgrepadd <mods>vimgrepadd <args>
    command! -nargs=* Xgrep <mods> grep <args>
    command! -nargs=* Xgrepadd <mods> grepadd <args>
    command! -nargs=* Xhelpgrep helpgrep <args>
    command! -nargs=0 -count Xcc <count>cc
    command! -count=1 -nargs=0 Xbelow <mods><count>cbelow
    command! -count=1 -nargs=0 Xabove <mods><count>cabove
    command! -count=1 -nargs=0 Xbefore <mods><count>cbefore
    command! -count=1 -nargs=0 Xafter <mods><count>cafter
    let g:Xgetlist = function('getqflist')
    let g:Xsetlist = function('setqflist')
    call setqflist([], 'f')
  else
    command! -nargs=* -bang Xlist <mods>llist<bang> <args>
    command! -nargs=* Xgetexpr <mods>lgetexpr <args>
    command! -nargs=* Xaddexpr <mods>laddexpr <args>
    command! -nargs=* -count Xolder <mods><count>lolder <args>
    command! -nargs=* Xnewer <mods>lnewer <args>
    command! -nargs=* Xopen <mods>lopen <args>
    command! -nargs=* Xwindow <mods>lwindow <args>
    command! -nargs=* Xbottom <mods>lbottom <args>
    command! -nargs=* Xclose <mods>lclose <args>
    command! -nargs=* -bang Xfile <mods>lfile<bang> <args>
    command! -nargs=* Xgetfile <mods>lgetfile <args>
    command! -nargs=* Xaddfile <mods>laddfile <args>
    command! -nargs=* -bang Xbuffer <mods>lbuffer<bang> <args>
    command! -nargs=* Xgetbuffer <mods>lgetbuffer <args>
    command! -nargs=* Xaddbuffer <mods>laddbuffer <args>
    command! -nargs=* Xrewind <mods>lrewind <args>
    command! -count -nargs=* -bang Xnext <mods><count>lnext<bang> <args>
    command! -count -nargs=* -bang Xprev <mods><count>lprev<bang> <args>
    command! -nargs=* -bang Xfirst <mods>lfirst<bang> <args>
    command! -nargs=* -bang Xlast <mods>llast<bang> <args>
    command! -count -nargs=* -bang Xnfile <mods><count>lnfile<bang> <args>
    command! -nargs=* -bang Xpfile <mods>lpfile<bang> <args>
    command! -nargs=* Xexpr <mods>lexpr <args>
    command! -range -nargs=* Xvimgrep <mods><count>lvimgrep <args>
    command! -nargs=* Xvimgrepadd <mods>lvimgrepadd <args>
    command! -nargs=* Xgrep <mods> lgrep <args>
    command! -nargs=* Xgrepadd <mods> lgrepadd <args>
    command! -nargs=* Xhelpgrep lhelpgrep <args>
    command! -nargs=0 -count Xcc <count>ll
    command! -count=1 -nargs=0 Xbelow <mods><count>lbelow
    command! -count=1 -nargs=0 Xabove <mods><count>labove
    command! -count=1 -nargs=0 Xbefore <mods><count>lbefore
    command! -count=1 -nargs=0 Xafter <mods><count>lafter
    let g:Xgetlist = function('getloclist', [0])
    let g:Xsetlist = function('setloclist', [0])
    call setloclist(0, [], 'f')
  endif
endfunc

" Tests for the :clist and :llist commands
func XlistTests(cchar)
  call s:setup_commands(a:cchar)

  if a:cchar == 'l'
      call assert_fails('llist', 'E776:')
  endif
  " With an empty list, command should return error
  Xgetexpr []
  silent! Xlist
  call assert_true(v:errmsg ==# 'E42: No Errors')

  " Populate the list and then try
  Xgetexpr ['non-error 1', 'Xtestfile1:1:3:Line1',
		  \ 'non-error 2', 'Xtestfile2:2:2:Line2',
		  \ 'non-error 3', 'Xtestfile3:3:1:Line3']

  " List only valid entries
  let l = split(execute('Xlist', ''), "\n")
  call assert_equal([' 2 Xtestfile1:1 col 3: Line1',
		   \ ' 4 Xtestfile2:2 col 2: Line2',
		   \ ' 6 Xtestfile3:3 col 1: Line3'], l)

  " List all the entries
  let l = split(execute('Xlist!', ''), "\n")
  call assert_equal([' 1: non-error 1', ' 2 Xtestfile1:1 col 3: Line1',
		   \ ' 3: non-error 2', ' 4 Xtestfile2:2 col 2: Line2',
		   \ ' 5: non-error 3', ' 6 Xtestfile3:3 col 1: Line3'], l)

  " List a range of errors
  let l = split(execute('Xlist 3,6', ''), "\n")
  call assert_equal([' 4 Xtestfile2:2 col 2: Line2',
		   \ ' 6 Xtestfile3:3 col 1: Line3'], l)

  let l = split(execute('Xlist! 3,4', ''), "\n")
  call assert_equal([' 3: non-error 2', ' 4 Xtestfile2:2 col 2: Line2'], l)

  let l = split(execute('Xlist -6,-4', ''), "\n")
  call assert_equal([' 2 Xtestfile1:1 col 3: Line1'], l)

  let l = split(execute('Xlist! -5,-3', ''), "\n")
  call assert_equal([' 2 Xtestfile1:1 col 3: Line1',
		   \ ' 3: non-error 2', ' 4 Xtestfile2:2 col 2: Line2'], l)

  " Test for '+'
  let l = split(execute('Xlist! +2', ''), "\n")
  call assert_equal([' 2 Xtestfile1:1 col 3: Line1',
		   \ ' 3: non-error 2', ' 4 Xtestfile2:2 col 2: Line2'], l)

  " Different types of errors
  call g:Xsetlist([{'lnum':10,'col':5,'type':'W', 'text':'Warning','nr':11},
	      \ {'lnum':20,'col':10,'type':'e','text':'Error','nr':22},
	      \ {'lnum':30,'col':15,'type':'i','text':'Info','nr':33},
	      \ {'lnum':40,'col':20,'type':'x', 'text':'Other','nr':44},
	      \ {'lnum':50,'col':25,'type':"\<C-A>",'text':'one','nr':55}])
  let l = split(execute('Xlist', ""), "\n")
  call assert_equal([' 1:10 col 5 warning  11: Warning',
	      \ ' 2:20 col 10 error  22: Error',
	      \ ' 3:30 col 15 info  33: Info',
	      \ ' 4:40 col 20 x  44: Other',
	      \ ' 5:50 col 25  55: one'], l)

  " Test for module names, one needs to explicitly set `'valid':v:true` so
  call g:Xsetlist([
	\ {'lnum':10,'col':5,'type':'W','module':'Data.Text','text':'ModuleWarning','nr':11,'valid':v:true},
	\ {'lnum':20,'col':10,'type':'W','module':'Data.Text','filename':'Data/Text.hs','text':'ModuleWarning','nr':22,'valid':v:true},
	\ {'lnum':30,'col':15,'type':'W','filename':'Data/Text.hs','text':'FileWarning','nr':33,'valid':v:true}])
  let l = split(execute('Xlist', ""), "\n")
  call assert_equal([' 1 Data.Text:10 col 5 warning  11: ModuleWarning',
	\ ' 2 Data.Text:20 col 10 warning  22: ModuleWarning',
	\ ' 3 Data/Text.hs:30 col 15 warning  33: FileWarning'], l)

  " Error cases
  call assert_fails('Xlist abc', 'E488:')
endfunc

func Test_clist()
  call XlistTests('c')
  call XlistTests('l')
endfunc

" Tests for the :colder, :cnewer, :lolder and :lnewer commands
" Note that this test assumes that a quickfix/location list is
" already set by the caller.
func XageTests(cchar)
  call s:setup_commands(a:cchar)

  if a:cchar == 'l'
    " No location list for the current window
    call assert_fails('lolder', 'E776:')
    call assert_fails('lnewer', 'E776:')
  endif

  let list = [{'bufnr': bufnr('%'), 'lnum': 1}]
  call g:Xsetlist(list)

  " Jumping to a non existent list should return error
  silent! Xolder 99
  call assert_true(v:errmsg ==# 'E380: At bottom of quickfix stack')

  silent! Xnewer 99
  call assert_true(v:errmsg ==# 'E381: At top of quickfix stack')

  " Add three quickfix/location lists
  Xgetexpr ['Xtestfile1:1:3:Line1']
  Xgetexpr ['Xtestfile2:2:2:Line2']
  Xgetexpr ['Xtestfile3:3:1:Line3']

  " Go back two lists
  Xolder
  let l = g:Xgetlist()
  call assert_equal('Line2', l[0].text)

  " Go forward two lists
  Xnewer
  let l = g:Xgetlist()
  call assert_equal('Line3', l[0].text)

  " Test for the optional count argument
  Xolder 2
  let l = g:Xgetlist()
  call assert_equal('Line1', l[0].text)

  Xnewer 2
  let l = g:Xgetlist()
  call assert_equal('Line3', l[0].text)
endfunc

func Test_cage()
  call XageTests('c')
  call XageTests('l')
endfunc

" Tests for the :cwindow, :lwindow :cclose, :lclose, :copen and :lopen
" commands
func XwindowTests(cchar)
  call s:setup_commands(a:cchar)

  " Opening the location list window without any errors should fail
  if a:cchar == 'l'
      call assert_fails('lopen', 'E776:')
  endif

  " Create a list with no valid entries
  Xgetexpr ['non-error 1', 'non-error 2', 'non-error 3']

  " Quickfix/Location window should not open with no valid errors
  Xwindow
  call assert_true(winnr('$') == 1)

  " Create a list with valid entries
  Xgetexpr ['Xtestfile1:1:3:Line1', 'Xtestfile2:2:2:Line2',
		  \ 'Xtestfile3:3:1:Line3']

  " Open the window
  Xwindow
  call assert_true(winnr('$') == 2 && winnr() == 2 &&
	\ getline('.') ==# 'Xtestfile1|1 col 3| Line1')
  redraw!

  " Close the window
  Xclose
  call assert_true(winnr('$') == 1)

  " Create a list with no valid entries
  Xgetexpr ['non-error 1', 'non-error 2', 'non-error 3']

  " Open the window
  Xopen 5
  call assert_true(winnr('$') == 2 && getline('.') ==# '|| non-error 1'
		      \  && winheight('.') == 5)

  " Opening the window again, should move the cursor to that window
  wincmd t
  Xopen 7
  call assert_true(winnr('$') == 2 && winnr() == 2 &&
	\ winheight('.') == 7 &&
	\ getline('.') ==# '|| non-error 1')


  " Calling cwindow should close the quickfix window with no valid errors
  Xwindow
  call assert_true(winnr('$') == 1)

  if a:cchar == 'c'
      " Opening the quickfix window in multiple tab pages should reuse the
      " quickfix buffer
      Xgetexpr ['Xtestfile1:1:3:Line1', 'Xtestfile2:2:2:Line2',
		  \ 'Xtestfile3:3:1:Line3']
      Xopen
      let qfbufnum = bufnr('%')
      tabnew
      Xopen
      call assert_equal(qfbufnum, bufnr('%'))
      new | only | tabonly
  endif
endfunc

func Test_cwindow()
  call XwindowTests('c')
  call XwindowTests('l')
endfunc

func Test_copenHeight()
  copen
  wincmd H
  let height = winheight(0)
  copen 10
  call assert_equal(height, winheight(0))
  quit
endfunc

" Tests for the :cfile, :lfile, :caddfile, :laddfile, :cgetfile and :lgetfile
" commands.
func XfileTests(cchar)
  call s:setup_commands(a:cchar)

  call writefile(['Xtestfile1:700:10:Line 700',
	\ 'Xtestfile2:800:15:Line 800'], 'Xqftestfile1')

  enew!
  Xfile Xqftestfile1
  let l = g:Xgetlist()
  call assert_true(len(l) == 2 &&
	\ l[0].lnum == 700 && l[0].col == 10 && l[0].text ==# 'Line 700' &&
	\ l[1].lnum == 800 && l[1].col == 15 && l[1].text ==# 'Line 800')

  " Test with a non existent file
  call assert_fails('Xfile non_existent_file', 'E40')

  " Run cfile/lfile from a modified buffer
  enew!
  silent! put ='Quickfix'
  silent! Xfile Xqftestfile1
  call assert_true(v:errmsg ==# 'E37: No write since last change (add ! to override)')

  call writefile(['Xtestfile3:900:30:Line 900'], 'Xqftestfile1')
  Xaddfile Xqftestfile1
  let l = g:Xgetlist()
  call assert_true(len(l) == 3 &&
	\ l[2].lnum == 900 && l[2].col == 30 && l[2].text ==# 'Line 900')

  call writefile(['Xtestfile1:222:77:Line 222',
	\ 'Xtestfile2:333:88:Line 333'], 'Xqftestfile1')

  enew!
  Xgetfile Xqftestfile1
  let l = g:Xgetlist()
  call assert_true(len(l) == 2 &&
	\ l[0].lnum == 222 && l[0].col == 77 && l[0].text ==# 'Line 222' &&
	\ l[1].lnum == 333 && l[1].col == 88 && l[1].text ==# 'Line 333')

  call delete('Xqftestfile1')
endfunc

func Test_cfile()
  call XfileTests('c')
  call XfileTests('l')
endfunc

" Tests for the :cbuffer, :lbuffer, :caddbuffer, :laddbuffer, :cgetbuffer and
" :lgetbuffer commands.
func XbufferTests(cchar)
  call s:setup_commands(a:cchar)

  enew!
  silent! call setline(1, ['Xtestfile7:700:10:Line 700',
	\ 'Xtestfile8:800:15:Line 800'])
  Xbuffer!
  let l = g:Xgetlist()
  call assert_true(len(l) == 2 &&
	\ l[0].lnum == 700 && l[0].col == 10 && l[0].text ==# 'Line 700' &&
	\ l[1].lnum == 800 && l[1].col == 15 && l[1].text ==# 'Line 800')

  enew!
  silent! call setline(1, ['Xtestfile9:900:55:Line 900',
	\ 'Xtestfile10:950:66:Line 950'])
  Xgetbuffer
  let l = g:Xgetlist()
  call assert_true(len(l) == 2 &&
	\ l[0].lnum == 900 && l[0].col == 55 && l[0].text ==# 'Line 900' &&
	\ l[1].lnum == 950 && l[1].col == 66 && l[1].text ==# 'Line 950')

  enew!
  silent! call setline(1, ['Xtestfile11:700:20:Line 700',
	\ 'Xtestfile12:750:25:Line 750'])
  Xaddbuffer
  let l = g:Xgetlist()
  call assert_true(len(l) == 4 &&
	\ l[1].lnum == 950 && l[1].col == 66 && l[1].text ==# 'Line 950' &&
	\ l[2].lnum == 700 && l[2].col == 20 && l[2].text ==# 'Line 700' &&
	\ l[3].lnum == 750 && l[3].col == 25 && l[3].text ==# 'Line 750')
  enew!

  " Check for invalid buffer
  call assert_fails('Xbuffer 199', 'E474:')

  " Check for unloaded buffer
  edit Xtestfile1
  let bnr = bufnr('%')
  enew!
  call assert_fails('Xbuffer ' . bnr, 'E681:')

  " Check for invalid range
  " Using Xbuffer will not run the range check in the cbuffer/lbuffer
  " commands. So directly call the commands.
  if (a:cchar == 'c')
      call assert_fails('900,999cbuffer', 'E16:')
  else
      call assert_fails('900,999lbuffer', 'E16:')
  endif
endfunc

func Test_cbuffer()
  call XbufferTests('c')
  call XbufferTests('l')
endfunc

func XexprTests(cchar)
  call s:setup_commands(a:cchar)

  call assert_fails('Xexpr 10', 'E777:')
endfunc

func Test_cexpr()
  call XexprTests('c')
  call XexprTests('l')
endfunc

" Tests for :cnext, :cprev, :cfirst, :clast commands
func Xtest_browse(cchar)
  call s:setup_commands(a:cchar)

  call g:Xsetlist([], 'f')
  " Jumping to first or next location list entry without any error should
  " result in failure
  if a:cchar == 'c'
    let err = 'E42:'
  else
    let err = 'E776:'
  endif
  call assert_fails('Xnext', err)
  call assert_fails('Xprev', err)
  call assert_fails('Xnfile', err)
  call assert_fails('Xpfile', err)

  call s:create_test_file('Xqftestfile1')
  call s:create_test_file('Xqftestfile2')

  Xgetexpr ['Xqftestfile1:5:Line5',
		\ 'Xqftestfile1:6:Line6',
		\ 'Xqftestfile2:10:Line10',
		\ 'Xqftestfile2:11:Line11',
		\ 'RegularLine1',
		\ 'RegularLine2']

  Xfirst
  call assert_fails('Xprev', 'E553')
  call assert_fails('Xpfile', 'E553')
  Xnfile
  call assert_equal('Xqftestfile2', bufname('%'))
  call assert_equal(10, line('.'))
  Xpfile
  call assert_equal('Xqftestfile1', bufname('%'))
  call assert_equal(6, line('.'))
  5Xcc
  call assert_equal(5, g:Xgetlist({'idx':0}).idx)
  2Xcc
  call assert_equal(2, g:Xgetlist({'idx':0}).idx)
  10Xcc
  call assert_equal(6, g:Xgetlist({'idx':0}).idx)
  Xlast
  Xprev
  call assert_equal('Xqftestfile2', bufname('%'))
  call assert_equal(11, line('.'))
  call assert_fails('Xnext', 'E553')
  call assert_fails('Xnfile', 'E553')
  Xrewind
  call assert_equal('Xqftestfile1', bufname('%'))
  call assert_equal(5, line('.'))

  10Xnext
  call assert_equal('Xqftestfile2', bufname('%'))
  call assert_equal(11, line('.'))
  10Xprev
  call assert_equal('Xqftestfile1', bufname('%'))
  call assert_equal(5, line('.'))

  " Jumping to an error from the error window using cc command
  Xgetexpr ['Xqftestfile1:5:Line5',
		\ 'Xqftestfile1:6:Line6',
		\ 'Xqftestfile2:10:Line10',
		\ 'Xqftestfile2:11:Line11']
  Xopen
  10Xcc
  call assert_equal(11, line('.'))
  call assert_equal('Xqftestfile2', bufname('%'))

  " Jumping to an error from the error window (when only the error window is
  " present)
  Xopen | only
  Xlast 1
  call assert_equal(5, line('.'))
  call assert_equal('Xqftestfile1', bufname('%'))

  Xexpr ""
  call assert_fails('Xnext', 'E42:')

  call delete('Xqftestfile1')
  call delete('Xqftestfile2')

  " Should be able to use next/prev with invalid entries
  Xexpr ""
  call assert_equal(0, g:Xgetlist({'idx' : 0}).idx)
  call assert_equal(0, g:Xgetlist({'size' : 0}).size)
  Xaddexpr ['foo', 'bar', 'baz', 'quux', 'shmoo']
  call assert_equal(5, g:Xgetlist({'size' : 0}).size)
  Xlast
  call assert_equal(5, g:Xgetlist({'idx' : 0}).idx)
  Xfirst
  call assert_equal(1, g:Xgetlist({'idx' : 0}).idx)
  2Xnext
  call assert_equal(3, g:Xgetlist({'idx' : 0}).idx)
endfunc

func Test_browse()
  call Xtest_browse('c')
  call Xtest_browse('l')
endfunc

func Test_nomem()
  call test_alloc_fail(GetAllocId('qf_dirname_start'), 0, 0)
  call assert_fails('vimgrep vim runtest.vim', 'E342:')

  call GetAllocId('qf_dirname_now')->test_alloc_fail(0, 0)
  call assert_fails('vimgrep vim runtest.vim', 'E342:')

  call test_alloc_fail(GetAllocId('qf_namebuf'), 0, 0)
  call assert_fails('cfile runtest.vim', 'E342:')

  call test_alloc_fail(GetAllocId('qf_errmsg'), 0, 0)
  call assert_fails('cfile runtest.vim', 'E342:')

  call test_alloc_fail(GetAllocId('qf_pattern'), 0, 0)
  call assert_fails('cfile runtest.vim', 'E342:')

endfunc

func s:test_xhelpgrep(cchar)
  call s:setup_commands(a:cchar)
  Xhelpgrep quickfix
  Xopen
  if a:cchar == 'c'
    let title_text = ':helpgrep quickfix'
  else
    let title_text = ':lhelpgrep quickfix'
  endif
  call assert_true(w:quickfix_title =~ title_text, w:quickfix_title)

  " Jumping to a help topic should open the help window
  only
  Xnext
  call assert_true(&buftype == 'help')
  call assert_true(winnr('$') == 2)
  " Jumping to the next match should reuse the help window
  Xnext
  call assert_true(&buftype == 'help')
  call assert_true(winnr() == 1)
  call assert_true(winnr('$') == 2)
  " Jumping to the next match from the quickfix window should reuse the help
  " window
  Xopen
  Xnext
  call assert_true(&buftype == 'help')
  call assert_true(winnr() == 1)
  call assert_true(winnr('$') == 2)

  " This wipes out the buffer, make sure that doesn't cause trouble.
  Xclose

  if a:cchar == 'l'
      " When a help window is present, running :lhelpgrep should reuse the
      " help window and not the current window
      new | only
      call g:Xsetlist([], 'f')
      help index.txt
      wincmd w
      lhelpgrep quickfix
      call assert_equal(1, winnr())
      call assert_notequal([], getloclist(1))
      call assert_equal([], getloclist(2))
  endif

  new | only

  " Search for non existing help string
  call assert_fails('Xhelpgrep a1b2c3', 'E480:')
  " Invalid regular expression
  call assert_fails('Xhelpgrep \@<!', 'E480:')
endfunc

func Test_helpgrep()
  call s:test_xhelpgrep('c')
  helpclose
  call s:test_xhelpgrep('l')
endfunc

func Test_errortitle()
  augroup QfBufWinEnter
    au!
    au BufWinEnter * :let g:a=get(w:, 'quickfix_title', 'NONE')
  augroup END
  copen
  let a=[{'lnum': 308, 'bufnr': bufnr(''), 'col': 58, 'valid': 1, 'vcol': 0, 'nr': 0, 'type': '', 'pattern': '', 'text': '    au BufWinEnter * :let g:a=get(w:, ''quickfix_title'', ''NONE'')'}]
  call setqflist(a)
  call assert_equal(':setqflist()', g:a)
  augroup QfBufWinEnter
    au!
  augroup END
  augroup! QfBufWinEnter
endfunc

func Test_vimgreptitle()
  augroup QfBufWinEnter
    au!
    au BufWinEnter * :let g:a=get(w:, 'quickfix_title', 'NONE')
  augroup END
  try
    vimgrep /pattern/j file
  catch /E480/
  endtry
  copen
  call assert_equal(':    vimgrep /pattern/j file', g:a)
  augroup QfBufWinEnter
    au!
  augroup END
  augroup! QfBufWinEnter
endfunc

func XqfTitleTests(cchar)
  call s:setup_commands(a:cchar)

  Xgetexpr ['file:1:1:message']
  let l = g:Xgetlist()
  if a:cchar == 'c'
    call setqflist(l, 'r')
  else
    call setloclist(0, l, 'r')
  endif

  Xopen
  if a:cchar == 'c'
    let title = ':setqflist()'
  else
    let title = ':setloclist()'
  endif
  call assert_equal(title, w:quickfix_title)
  Xclose
endfunc

" Tests for quickfix window's title
func Test_qf_title()
  call XqfTitleTests('c')
  call XqfTitleTests('l')
endfunc

" Tests for 'errorformat'
func Test_efm()
  let save_efm = &efm
  set efm=%EEEE%m,%WWWW%m,%+CCCC%.%#,%-GGGG%.%#
  cgetexpr ['WWWW', 'EEEE', 'CCCC']
  let l = strtrans(string(map(getqflist(), '[v:val.text, v:val.valid]')))
  call assert_equal("[['W', 1], ['E^@CCCC', 1]]", l)
  cgetexpr ['WWWW', 'GGGG', 'EEEE', 'CCCC']
  let l = strtrans(string(map(getqflist(), '[v:val.text, v:val.valid]')))
  call assert_equal("[['W', 1], ['E^@CCCC', 1]]", l)
  cgetexpr ['WWWW', 'GGGG', 'ZZZZ', 'EEEE', 'CCCC', 'YYYY']
  let l = strtrans(string(map(getqflist(), '[v:val.text, v:val.valid]')))
  call assert_equal("[['W', 1], ['ZZZZ', 0], ['E^@CCCC', 1], ['YYYY', 0]]", l)
  let &efm = save_efm
endfunc

" This will test for problems in quickfix:
" A. incorrectly copying location lists which caused the location list to show
"    a different name than the file that was actually being displayed.
" B. not reusing the window for which the location list window is opened but
"    instead creating new windows.
" C. make sure that the location list window is not reused instead of the
"    window it belongs to.
"
" Set up the test environment:
func ReadTestProtocol(name)
  let base = substitute(a:name, '\v^test://(.*)%(\.[^.]+)?', '\1', '')
  let word = substitute(base, '\v(.*)\..*', '\1', '')

  setl modifiable
  setl noreadonly
  setl noswapfile
  setl bufhidden=delete
  %del _
  " For problem 2:
  " 'buftype' has to be set to reproduce the constant opening of new windows
  setl buftype=nofile

  call setline(1, word)

  setl nomodified
  setl nomodifiable
  setl readonly
  exe 'doautocmd BufRead ' . substitute(a:name, '\v^test://(.*)', '\1', '')
endfunc

func Test_locationlist()
    enew

    augroup testgroup
      au!
      autocmd BufReadCmd test://* call ReadTestProtocol(expand("<amatch>"))
    augroup END

    let words = [ "foo", "bar", "baz", "quux", "shmoo", "spam", "eggs" ]

    let qflist = []
    for word in words
      call add(qflist, {'filename': 'test://' . word . '.txt', 'text': 'file ' . word . '.txt', })
      " NOTE: problem 1:
      " intentionally not setting 'lnum' so that the quickfix entries are not
      " valid
      eval qflist->setloclist(0, ' ')
    endfor

    " Test A
    lrewind
    enew
    lopen
    4lnext
    vert split
    wincmd L
    lopen
    wincmd p
    lnext
    let fileName = expand("%")
    wincmd p
    let locationListFileName = substitute(getline(line('.')), '\([^|]*\)|.*', '\1', '')
    let fileName = substitute(fileName, '\\', '/', 'g')
    let locationListFileName = substitute(locationListFileName, '\\', '/', 'g')
    call assert_equal("test://bar.txt", fileName)
    call assert_equal("test://bar.txt", locationListFileName)

    wincmd n | only

    " Test B:
    lrewind
    lopen
    2
    exe "normal \<CR>"
    wincmd p
    3
    exe "normal \<CR>"
    wincmd p
    4
    exe "normal \<CR>"
    call assert_equal(2, winnr('$'))
    wincmd n | only

    " Test C:
    lrewind
    lopen
    " Let's move the location list window to the top to check whether it (the
    " first window found) will be reused when we try to open new windows:
    wincmd K
    2
    exe "normal \<CR>"
    wincmd p
    3
    exe "normal \<CR>"
    wincmd p
    4
    exe "normal \<CR>"
    1wincmd w
    call assert_equal('quickfix', &buftype)
    2wincmd w
    let bufferName = expand("%")
    let bufferName = substitute(bufferName, '\\', '/', 'g')
    call assert_equal('test://quux.txt', bufferName)

    wincmd n | only

    augroup! testgroup
endfunc

func Test_locationlist_curwin_was_closed()
    augroup testgroup
      au!
      autocmd BufReadCmd test_curwin.txt call R(expand("<amatch>"))
    augroup END

    func! R(n)
      quit
    endfunc

    new
    let q = []
    call add(q, {'filename': 'test_curwin.txt' })
    call setloclist(0, q)
    call assert_fails('lrewind', 'E924:')

    augroup! testgroup
endfunc

func Test_locationlist_cross_tab_jump()
  call writefile(['loclistfoo'], 'loclistfoo')
  call writefile(['loclistbar'], 'loclistbar')
  set switchbuf=usetab

  edit loclistfoo
  tabedit loclistbar
  silent lgrep loclistfoo loclist*
  call assert_equal(1, tabpagenr())

  enew | only | tabonly
  set switchbuf&vim
  call delete('loclistfoo')
  call delete('loclistbar')
endfunc

" More tests for 'errorformat'
func Test_efm1()
    if !has('unix')
	" The 'errorformat' setting is different on non-Unix systems.
	" This test works only on Unix-like systems.
	return
    endif

    let l =<< trim [DATA]
      "Xtestfile", line 4.12: 1506-045 (S) Undeclared identifier fd_set.
      ﻿"Xtestfile", line 6 col 19; this is an error
      gcc -c -DHAVE_CONFIsing-prototypes -I/usr/X11R6/include  version.c
      Xtestfile:9: parse error before `asd'
      make: *** [vim] Error 1
      in file "Xtestfile" linenr 10: there is an error
  
      2 returned
      "Xtestfile", line 11 col 1; this is an error
      "Xtestfile", line 12 col 2; this is another error
      "Xtestfile", line 14:10; this is an error in column 10
      =Xtestfile=, line 15:10; this is another error, but in vcol 10 this time
      "Xtestfile", linenr 16: yet another problem
      Error in "Xtestfile" at line 17:
      x should be a dot
      	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 17
                  ^
      Error in "Xtestfile" at line 18:
      x should be a dot
      	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 18
      .............^
      Error in "Xtestfile" at line 19:
      x should be a dot
      	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 19
      --------------^
      Error in "Xtestfile" at line 20:
      x should be a dot
      	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 20
      	       ^
  
      Does anyone know what is the problem and how to correction it?
      "Xtestfile", line 21 col 9: What is the title of the quickfix window?
      "Xtestfile", line 22 col 9: What is the title of the quickfix window?
    [DATA]

    call writefile(l, 'Xerrorfile1')
    call writefile(l[:-2], 'Xerrorfile2')

    let m =<< [DATA]
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line  2
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line  3
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line  4
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line  5
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line  6
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line  7
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line  8
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line  9
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 10
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 11
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 12
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 13
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 14
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 15
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 16
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 17
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 18
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 19
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 20
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 21
	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    line 22
[DATA]
    call writefile(m, 'Xtestfile')

    let save_efm = &efm
    set efm+==%f=\\,\ line\ %l%*\\D%v%*[^\ ]\ %m
    set efm^=%AError\ in\ \"%f\"\ at\ line\ %l:,%Z%p^,%C%m

    exe 'cf Xerrorfile2'
    clast
    copen
    call assert_equal(':cf Xerrorfile2', w:quickfix_title)
    wincmd p

    exe 'cf Xerrorfile1'
    call assert_equal([4, 12], [line('.'), col('.')])
    cn
    call assert_equal([6, 19], [line('.'), col('.')])
    cn
    call assert_equal([9, 2], [line('.'), col('.')])
    cn
    call assert_equal([10, 2], [line('.'), col('.')])
    cn
    call assert_equal([11, 1], [line('.'), col('.')])
    cn
    call assert_equal([12, 2], [line('.'), col('.')])
    cn
    call assert_equal([14, 10], [line('.'), col('.')])
    cn
    call assert_equal([15, 3, 10], [line('.'), col('.'), virtcol('.')])
    cn
    call assert_equal([16, 2], [line('.'), col('.')])
    cn
    call assert_equal([17, 6], [line('.'), col('.')])
    cn
    call assert_equal([18, 7], [line('.'), col('.')])
    cn
    call assert_equal([19, 8], [line('.'), col('.')])
    cn
    call assert_equal([20, 9], [line('.'), col('.')])
    clast
    cprev
    cprev
    wincmd w
    call assert_equal(':cf Xerrorfile1', w:quickfix_title)
    wincmd p

    let &efm = save_efm
    call delete('Xerrorfile1')
    call delete('Xerrorfile2')
    call delete('Xtestfile')
endfunc

" Test for quickfix directory stack support
func s:dir_stack_tests(cchar)
  call s:setup_commands(a:cchar)

  let save_efm=&efm
  set efm=%DEntering\ dir\ '%f',%f:%l:%m,%XLeaving\ dir\ '%f'

  let lines = ["Entering dir 'dir1/a'",
		\ 'habits2.txt:1:Nine Healthy Habits',
		\ "Entering dir 'b'",
		\ 'habits3.txt:2:0 Hours of television',
		\ 'habits2.txt:7:5 Small meals',
		\ "Entering dir 'dir1/c'",
		\ 'habits4.txt:3:1 Hour of exercise',
		\ "Leaving dir 'dir1/c'",
		\ "Leaving dir 'dir1/a'",
		\ 'habits1.txt:4:2 Liters of water',
		\ "Entering dir 'dir2'",
		\ 'habits5.txt:5:3 Cups of hot green tea',
		\ "Leaving dir 'dir2'"
		\]

  Xexpr ""
  for l in lines
      Xaddexpr l
  endfor

  let qf = g:Xgetlist()

  call assert_equal('dir1/a/habits2.txt', bufname(qf[1].bufnr))
  call assert_equal(1, qf[1].lnum)
  call assert_equal('dir1/a/b/habits3.txt', bufname(qf[3].bufnr))
  call assert_equal(2, qf[3].lnum)
  call assert_equal('dir1/a/habits2.txt', bufname(qf[4].bufnr))
  call assert_equal(7, qf[4].lnum)
  call assert_equal('dir1/c/habits4.txt', bufname(qf[6].bufnr))
  call assert_equal(3, qf[6].lnum)
  call assert_equal('habits1.txt', bufname(qf[9].bufnr))
  call assert_equal(4, qf[9].lnum)
  call assert_equal('dir2/habits5.txt', bufname(qf[11].bufnr))
  call assert_equal(5, qf[11].lnum)

  let &efm=save_efm
endfunc

" Tests for %D and %X errorformat options
func Test_efm_dirstack()
  " Create the directory stack and files
  call mkdir('dir1')
  call mkdir('dir1/a')
  call mkdir('dir1/a/b')
  call mkdir('dir1/c')
  call mkdir('dir2')

  let lines = ["Nine Healthy Habits",
		\ "0 Hours of television",
		\ "1 Hour of exercise",
		\ "2 Liters of water",
		\ "3 Cups of hot green tea",
		\ "4 Short mental breaks",
		\ "5 Small meals",
		\ "6 AM wake up time",
		\ "7 Minutes of laughter",
		\ "8 Hours of sleep (at least)",
		\ "9 PM end of the day and off to bed"
		\ ]
  call writefile(lines, 'habits1.txt')
  call writefile(lines, 'dir1/a/habits2.txt')
  call writefile(lines, 'dir1/a/b/habits3.txt')
  call writefile(lines, 'dir1/c/habits4.txt')
  call writefile(lines, 'dir2/habits5.txt')

  call s:dir_stack_tests('c')
  call s:dir_stack_tests('l')

  call delete('dir1', 'rf')
  call delete('dir2', 'rf')
  call delete('habits1.txt')
endfunc

" Test for resync after continuing an ignored message
func Xefm_ignore_continuations(cchar)
  call s:setup_commands(a:cchar)

  let save_efm = &efm

  let &efm =
	\ '%Eerror %m %l,' .
	\ '%-Wignored %m %l,' .
	\ '%+Cmore ignored %m %l,' .
	\ '%Zignored end'
  Xgetexpr ['ignored warning 1', 'more ignored continuation 2', 'ignored end', 'error resync 4']
  let l = map(g:Xgetlist(), '[v:val.text, v:val.valid, v:val.lnum, v:val.type]')
  call assert_equal([['resync', 1, 4, 'E']], l)

  let &efm = save_efm
endfunc

func Test_efm_ignore_continuations()
  call Xefm_ignore_continuations('c')
  call Xefm_ignore_continuations('l')
endfunc

" Tests for invalid error format specifies
func Xinvalid_efm_Tests(cchar)
  call s:setup_commands(a:cchar)

  let save_efm = &efm

  set efm=%f:%l:%m,%f:%f:%l:%m
  call assert_fails('Xexpr "abc.txt:1:Hello world"', 'E372:')

  set efm=%f:%l:%m,%f:%l:%r:%m
  call assert_fails('Xexpr "abc.txt:1:Hello world"', 'E373:')

  set efm=%f:%l:%m,%O:%f:%l:%m
  call assert_fails('Xexpr "abc.txt:1:Hello world"', 'E373:')

  set efm=%f:%l:%m,%f:%l:%*[^a-z
  call assert_fails('Xexpr "abc.txt:1:Hello world"', 'E374:')

  set efm=%f:%l:%m,%f:%l:%*c
  call assert_fails('Xexpr "abc.txt:1:Hello world"', 'E375:')

  set efm=%f:%l:%m,%L%M%N
  call assert_fails('Xexpr "abc.txt:1:Hello world"', 'E376:')

  set efm=%f:%l:%m,%f:%l:%m:%R
  call assert_fails('Xexpr "abc.txt:1:Hello world"', 'E377:')

  set efm=
  call assert_fails('Xexpr "abc.txt:1:Hello world"', 'E378:')

  set efm=%DEntering\ dir\ abc,%f:%l:%m
  call assert_fails('Xexpr ["Entering dir abc", "abc.txt:1:Hello world"]', 'E379:')

  let &efm = save_efm
endfunc

func Test_invalid_efm()
  call Xinvalid_efm_Tests('c')
  call Xinvalid_efm_Tests('l')
endfunc

" TODO:
" Add tests for the following formats in 'errorformat'
"	%r  %O
func Test_efm2()
  let save_efm = &efm

  " Test for %s format in efm
  set efm=%f:%s
  cexpr 'Xtestfile:Line search text'
  let l = getqflist()
  call assert_equal(l[0].pattern, '^\VLine search text\$')
  call assert_equal(l[0].lnum, 0)

  let l = split(execute('clist', ''), "\n")
  call assert_equal([' 1 Xtestfile:^\VLine search text\$:  '], l)

  " Test for %P, %Q and %t format specifiers
  let lines =<< trim [DATA]
    [Xtestfile1]
    (1,17)  error: ';' missing
    (21,2)  warning: variable 'z' not defined
    (67,3)  error: end of file found before string ended
    --

    [Xtestfile2]
    --

    [Xtestfile3]
    NEW compiler v1.1
    (2,2)   warning: variable 'x' not defined
    (67,3)  warning: 's' already defined
    --
  [DATA]

  set efm=%+P[%f]%r,(%l\\,%c)%*[\ ]%t%*[^:]:\ %m,%+Q--%r
  " To exercise the push/pop file functionality in quickfix, the test files
  " need to be created.
  call writefile(['Line1'], 'Xtestfile1')
  call writefile(['Line2'], 'Xtestfile2')
  call writefile(['Line3'], 'Xtestfile3')
  cexpr ""
  for l in lines
      caddexpr l
  endfor
  let l = getqflist()
  call assert_equal(12, len(l))
  call assert_equal(21, l[2].lnum)
  call assert_equal(2, l[2].col)
  call assert_equal('w', l[2].type)
  call assert_equal('e', l[3].type)
  call delete('Xtestfile1')
  call delete('Xtestfile2')
  call delete('Xtestfile3')

  " Tests for %E, %C and %Z format specifiers
  let lines =<< trim [DATA]
    Error 275
    line 42
    column 3
    ' ' expected after '--'
  [DATA]

  set efm=%EError\ %n,%Cline\ %l,%Ccolumn\ %c,%Z%m
  cgetexpr lines
  let l = getqflist()
  call assert_equal(275, l[0].nr)
  call assert_equal(42, l[0].lnum)
  call assert_equal(3, l[0].col)
  call assert_equal('E', l[0].type)
  call assert_equal("\n' ' expected after '--'", l[0].text)

  " Test for %>
  let lines =<< trim [DATA]
    Error in line 147 of foo.c:
    unknown variable 'i'
  [DATA]

  set efm=unknown\ variable\ %m,%E%>Error\ in\ line\ %l\ of\ %f:,%Z%m
  cgetexpr lines
  let l = getqflist()
  call assert_equal(147, l[0].lnum)
  call assert_equal('E', l[0].type)
  call assert_equal("\nunknown variable 'i'", l[0].text)

  " Test for %A, %C and other formats
  let lines =<< trim [DATA]
    ==============================================================
    FAIL: testGetTypeIdCachesResult (dbfacadeTest.DjsDBFacadeTest)
    --------------------------------------------------------------
    Traceback (most recent call last):
      File "unittests/dbfacadeTest.py", line 89, in testFoo
        self.assertEquals(34, dtid)
      File "/usr/lib/python2.2/unittest.py", line 286, in
     failUnlessEqual
        raise self.failureException, \\
    AssertionError: 34 != 33
  
    --------------------------------------------------------------
    Ran 27 tests in 0.063s
  [DATA]

  set efm=%C\ %.%#,%A\ \ File\ \"%f\"\\,\ line\ %l%.%#,%Z%[%^\ ]%\\@=%m
  cgetexpr lines
  let l = getqflist()
  call assert_equal(8, len(l))
  call assert_equal(89, l[4].lnum)
  call assert_equal(1, l[4].valid)
  call assert_equal('unittests/dbfacadeTest.py', bufname(l[4].bufnr))

  " Test for %o
  set efm=%f(%o):%l\ %m
  cgetexpr ['Xotestfile(Language.PureScript.Types):20 Error']
  call writefile(['Line1'], 'Xotestfile')
  let l = getqflist()
  call assert_equal(1, len(l), string(l))
  call assert_equal('Language.PureScript.Types', l[0].module)
  copen
  call assert_equal('Language.PureScript.Types|20| Error', getline(1))
  call feedkeys("\<CR>", 'xn')
  call assert_equal('Xotestfile', expand('%:t'))
  cclose
  bd
  call delete("Xotestfile")

  " The following sequence of commands used to crash Vim
  set efm=%W%m
  cgetexpr ['msg1']
  let l = getqflist()
  call assert_equal(1, len(l), string(l))
  call assert_equal('msg1', l[0].text)
  set efm=%C%m
  lexpr 'msg2'
  let l = getloclist(0)
  call assert_equal(1, len(l), string(l))
  call assert_equal('msg2', l[0].text)
  lopen
  call setqflist([], 'r')
  caddbuf
  let l = getqflist()
  call assert_equal(1, len(l), string(l))
  call assert_equal('|| msg2', l[0].text)

  " When matching error lines, case should be ignored. Test for this.
  set noignorecase
  let l=getqflist({'lines' : ['Xtest:FOO10:Line 20'], 'efm':'%f:foo%l:%m'})
  call assert_equal(10, l.items[0].lnum)
  call assert_equal('Line 20', l.items[0].text)
  set ignorecase&

  new | only
  let &efm = save_efm
endfunc

func XquickfixChangedByAutocmd(cchar)
  call s:setup_commands(a:cchar)
  if a:cchar == 'c'
    let ErrorNr = 'E925'
    func! ReadFunc()
      colder
      cgetexpr []
    endfunc
  else
    let ErrorNr = 'E926'
    func! ReadFunc()
      lolder
      lgetexpr []
    endfunc
  endif

  augroup testgroup
    au!
    autocmd BufReadCmd test_changed.txt call ReadFunc()
  augroup END

  new | only
  let words = [ "a", "b" ]
  let qflist = []
  for word in words
    call add(qflist, {'filename': 'test_changed.txt'})
    call g:Xsetlist(qflist, ' ')
  endfor
  call assert_fails('Xrewind', ErrorNr . ':')

  augroup! testgroup
endfunc

func Test_quickfix_was_changed_by_autocmd()
  call XquickfixChangedByAutocmd('c')
  call XquickfixChangedByAutocmd('l')
endfunc

func Test_caddbuffer_to_empty()
  helpgr quickfix
  call setqflist([], 'r')
  cad
  try
    cn
  catch
    " number of matches is unknown
    call assert_true(v:exception =~ 'E553:')
  endtry
  quit!
endfunc

func Test_cgetexpr_works()
  " this must not crash Vim
  cgetexpr [$x]
  lgetexpr [$x]
endfunc

" Tests for the setqflist() and setloclist() functions
func SetXlistTests(cchar, bnum)
  call s:setup_commands(a:cchar)

  call g:Xsetlist([{'bufnr': a:bnum, 'lnum': 1},
	      \  {'bufnr': a:bnum, 'lnum': 2}])
  let l = g:Xgetlist()
  call assert_equal(2, len(l))
  call assert_equal(2, l[1].lnum)

  Xnext
  call g:Xsetlist([{'bufnr': a:bnum, 'lnum': 3}], 'a')
  let l = g:Xgetlist()
  call assert_equal(3, len(l))
  Xnext
  call assert_equal(3, line('.'))

  " Appending entries to the list should not change the cursor position
  " in the quickfix window
  Xwindow
  1
  call g:Xsetlist([{'bufnr': a:bnum, 'lnum': 4},
	      \  {'bufnr': a:bnum, 'lnum': 5}], 'a')
  call assert_equal(1, line('.'))
  close

  call g:Xsetlist([{'bufnr': a:bnum, 'lnum': 3},
	      \  {'bufnr': a:bnum, 'lnum': 4},
	      \  {'bufnr': a:bnum, 'lnum': 5}], 'r')
  let l = g:Xgetlist()
  call assert_equal(3, len(l))
  call assert_equal(5, l[2].lnum)

  call g:Xsetlist([])
  let l = g:Xgetlist()
  call assert_equal(0, len(l))

  " Tests for setting the 'valid' flag
  call g:Xsetlist([{'bufnr':a:bnum, 'lnum':4, 'valid':0}])
  Xwindow
  call assert_equal(1, winnr('$'))
  let l = g:Xgetlist()
  call g:Xsetlist(l)
  call assert_equal(0, g:Xgetlist()[0].valid)
  " Adding a non-valid entry should not mark the list as having valid entries
  call g:Xsetlist([{'bufnr':a:bnum, 'lnum':5, 'valid':0}], 'a')
  Xwindow
  call assert_equal(1, winnr('$'))

  " :cnext/:cprev should still work even with invalid entries in the list
  let l = [{'bufnr' : a:bnum, 'lnum' : 1, 'text' : '1', 'valid' : 0},
	      \ {'bufnr' : a:bnum, 'lnum' : 2, 'text' : '2', 'valid' : 0}]
  call g:Xsetlist(l)
  Xnext
  call assert_equal(2, g:Xgetlist({'idx' : 0}).idx)
  Xprev
  call assert_equal(1, g:Xgetlist({'idx' : 0}).idx)
  " :cnext/:cprev should still work after appending invalid entries to an
  " empty list
  call g:Xsetlist([])
  call g:Xsetlist(l, 'a')
  Xnext
  call assert_equal(2, g:Xgetlist({'idx' : 0}).idx)
  Xprev
  call assert_equal(1, g:Xgetlist({'idx' : 0}).idx)

  call g:Xsetlist([{'text':'Text1', 'valid':1}])
  Xwindow
  call assert_equal(2, winnr('$'))
  Xclose
  let save_efm = &efm
  set efm=%m
  Xgetexpr 'TestMessage'
  let l = g:Xgetlist()
  call g:Xsetlist(l)
  call assert_equal(1, g:Xgetlist()[0].valid)
  let &efm = save_efm

  " Error cases:
  " Refer to a non-existing buffer and pass a non-dictionary type
  call assert_fails("call g:Xsetlist([{'bufnr':998, 'lnum':4}," .
	      \ " {'bufnr':999, 'lnum':5}])", 'E92:')
  call g:Xsetlist([[1, 2,3]])
  call assert_equal(0, len(g:Xgetlist()))
endfunc

func Test_setqflist()
  new Xtestfile | only
  let bnum = bufnr('%')
  call setline(1, range(1,5))

  call SetXlistTests('c', bnum)
  call SetXlistTests('l', bnum)

  enew!
  call delete('Xtestfile')
endfunc

func Xlist_empty_middle(cchar)
  call s:setup_commands(a:cchar)

  " create three quickfix lists
  let @/ = 'Test_'
  Xvimgrep // test_quickfix.vim
  let testlen = len(g:Xgetlist())
  call assert_true(testlen > 0)
  Xvimgrep empty test_quickfix.vim
  call assert_true(len(g:Xgetlist()) > 0)
  Xvimgrep matches test_quickfix.vim
  let matchlen = len(g:Xgetlist())
  call assert_true(matchlen > 0)
  Xolder
  " make the middle list empty
  call g:Xsetlist([], 'r')
  call assert_true(len(g:Xgetlist()) == 0)
  Xolder
  call assert_equal(testlen, len(g:Xgetlist()))
  Xnewer
  Xnewer
  call assert_equal(matchlen, len(g:Xgetlist()))
endfunc

func Test_setqflist_empty_middle()
  call Xlist_empty_middle('c')
  call Xlist_empty_middle('l')
endfunc

func Xlist_empty_older(cchar)
  call s:setup_commands(a:cchar)

  " create three quickfix lists
  Xvimgrep one test_quickfix.vim
  let onelen = len(g:Xgetlist())
  call assert_true(onelen > 0)
  Xvimgrep two test_quickfix.vim
  let twolen = len(g:Xgetlist())
  call assert_true(twolen > 0)
  Xvimgrep three test_quickfix.vim
  let threelen = len(g:Xgetlist())
  call assert_true(threelen > 0)
  Xolder 2
  " make the first list empty, check the others didn't change
  call g:Xsetlist([], 'r')
  call assert_true(len(g:Xgetlist()) == 0)
  Xnewer
  call assert_equal(twolen, len(g:Xgetlist()))
  Xnewer
  call assert_equal(threelen, len(g:Xgetlist()))
endfunc

func Test_setqflist_empty_older()
  call Xlist_empty_older('c')
  call Xlist_empty_older('l')
endfunc

func XquickfixSetListWithAct(cchar)
  call s:setup_commands(a:cchar)

  let list1 = [{'filename': 'fnameA', 'text': 'A'},
          \    {'filename': 'fnameB', 'text': 'B'}]
  let list2 = [{'filename': 'fnameC', 'text': 'C'},
          \    {'filename': 'fnameD', 'text': 'D'},
          \    {'filename': 'fnameE', 'text': 'E'}]

  " {action} is unspecified.  Same as specifying ' '.
  new | only
  silent! Xnewer 99
  call g:Xsetlist(list1)
  call g:Xsetlist(list2)
  let li = g:Xgetlist()
  call assert_equal(3, len(li))
  call assert_equal('C', li[0]['text'])
  call assert_equal('D', li[1]['text'])
  call assert_equal('E', li[2]['text'])
  silent! Xolder
  let li = g:Xgetlist()
  call assert_equal(2, len(li))
  call assert_equal('A', li[0]['text'])
  call assert_equal('B', li[1]['text'])

  " {action} is specified ' '.
  new | only
  silent! Xnewer 99
  call g:Xsetlist(list1)
  call g:Xsetlist(list2, ' ')
  let li = g:Xgetlist()
  call assert_equal(3, len(li))
  call assert_equal('C', li[0]['text'])
  call assert_equal('D', li[1]['text'])
  call assert_equal('E', li[2]['text'])
  silent! Xolder
  let li = g:Xgetlist()
  call assert_equal(2, len(li))
  call assert_equal('A', li[0]['text'])
  call assert_equal('B', li[1]['text'])

  " {action} is specified 'a'.
  new | only
  silent! Xnewer 99
  call g:Xsetlist(list1)
  call g:Xsetlist(list2, 'a')
  let li = g:Xgetlist()
  call assert_equal(5, len(li))
  call assert_equal('A', li[0]['text'])
  call assert_equal('B', li[1]['text'])
  call assert_equal('C', li[2]['text'])
  call assert_equal('D', li[3]['text'])
  call assert_equal('E', li[4]['text'])

  " {action} is specified 'r'.
  new | only
  silent! Xnewer 99
  call g:Xsetlist(list1)
  call g:Xsetlist(list2, 'r')
  let li = g:Xgetlist()
  call assert_equal(3, len(li))
  call assert_equal('C', li[0]['text'])
  call assert_equal('D', li[1]['text'])
  call assert_equal('E', li[2]['text'])

  " Test for wrong value.
  new | only
  call assert_fails("call g:Xsetlist(0)", 'E714:')
  call assert_fails("call g:Xsetlist(list1, '')", 'E927:')
  call assert_fails("call g:Xsetlist(list1, 'aa')", 'E927:')
  call assert_fails("call g:Xsetlist(list1, ' a')", 'E927:')
  call assert_fails("call g:Xsetlist(list1, 0)", 'E928:')
endfunc

func Test_setqflist_invalid_nr()
  " The following command used to crash Vim
  eval []->setqflist(' ', {'nr' : $XXX_DOES_NOT_EXIST})
endfunc

func Test_quickfix_set_list_with_act()
  call XquickfixSetListWithAct('c')
  call XquickfixSetListWithAct('l')
endfunc

func XLongLinesTests(cchar)
  let l = g:Xgetlist()

  call assert_equal(4, len(l))
  call assert_equal(1, l[0].lnum)
  call assert_equal(1, l[0].col)
  call assert_equal(1975, len(l[0].text))
  call assert_equal(2, l[1].lnum)
  call assert_equal(1, l[1].col)
  call assert_equal(4070, len(l[1].text))
  call assert_equal(3, l[2].lnum)
  call assert_equal(1, l[2].col)
  call assert_equal(4070, len(l[2].text))
  call assert_equal(4, l[3].lnum)
  call assert_equal(1, l[3].col)
  call assert_equal(10, len(l[3].text))

  call g:Xsetlist([], 'r')
endfunc

func s:long_lines_tests(cchar)
  call s:setup_commands(a:cchar)

  let testfile = 'samples/quickfix.txt'

  " file
  exe 'Xgetfile' testfile
  call XLongLinesTests(a:cchar)

  " list
  Xexpr readfile(testfile)
  call XLongLinesTests(a:cchar)

  " string
  Xexpr join(readfile(testfile), "\n")
  call XLongLinesTests(a:cchar)

  " buffer
  exe 'edit' testfile
  exe 'Xbuffer' bufnr('%')
  call XLongLinesTests(a:cchar)
endfunc

func Test_long_lines()
  call s:long_lines_tests('c')
  call s:long_lines_tests('l')
endfunc

func s:create_test_file(filename)
  let l = []
  for i in range(1, 20)
      call add(l, 'Line' . i)
  endfor
  call writefile(l, a:filename)
endfunc

func Test_switchbuf()
  call s:create_test_file('Xqftestfile1')
  call s:create_test_file('Xqftestfile2')
  call s:create_test_file('Xqftestfile3')

  new | only
  edit Xqftestfile1
  let file1_winid = win_getid()
  new Xqftestfile2
  let file2_winid = win_getid()
  cgetexpr ['Xqftestfile1:5:Line5',
		\ 'Xqftestfile1:6:Line6',
		\ 'Xqftestfile2:10:Line10',
		\ 'Xqftestfile2:11:Line11',
		\ 'Xqftestfile3:15:Line15',
		\ 'Xqftestfile3:16:Line16']

  new
  let winid = win_getid()
  cfirst | cnext
  call assert_equal(winid, win_getid())
  2cnext
  call assert_equal(winid, win_getid())
  2cnext
  call assert_equal(winid, win_getid())
  enew

  set switchbuf=useopen
  cfirst | cnext
  call assert_equal(file1_winid, win_getid())
  2cnext
  call assert_equal(file2_winid, win_getid())
  2cnext
  call assert_equal(file2_winid, win_getid())

  enew | only
  set switchbuf=usetab
  tabedit Xqftestfile1
  tabedit Xqftestfile2
  tabedit Xqftestfile3
  tabfirst
  cfirst | cnext
  call assert_equal(2, tabpagenr())
  2cnext
  call assert_equal(3, tabpagenr())
  6cnext
  call assert_equal(4, tabpagenr())
  2cpfile
  call assert_equal(2, tabpagenr())
  2cnfile
  call assert_equal(4, tabpagenr())
  tabfirst | tabonly | enew

  set switchbuf=split
  cfirst | cnext
  call assert_equal(1, winnr('$'))
  cnext | cnext
  call assert_equal(2, winnr('$'))
  cnext | cnext
  call assert_equal(3, winnr('$'))
  enew | only

  set switchbuf=newtab
  cfirst | cnext
  call assert_equal(1, tabpagenr('$'))
  cnext | cnext
  call assert_equal(2, tabpagenr('$'))
  cnext | cnext
  call assert_equal(3, tabpagenr('$'))
  tabfirst | enew | tabonly | only

  set switchbuf=
  edit Xqftestfile1
  let file1_winid = win_getid()
  new Xqftestfile2
  let file2_winid = win_getid()
  copen
  exe "normal 1G\<CR>"
  call assert_equal(file1_winid, win_getid())
  copen
  exe "normal 3G\<CR>"
  call assert_equal(file2_winid, win_getid())
  copen | only
  exe "normal 5G\<CR>"
  call assert_equal(2, winnr('$'))
  call assert_equal(1, bufwinnr('Xqftestfile3'))

  " If only quickfix window is open in the current tabpage, jumping to an
  " entry with 'switchbuf' set to 'usetab' should search in other tabpages.
  enew | only
  set switchbuf=usetab
  tabedit Xqftestfile1
  tabedit Xqftestfile2
  tabedit Xqftestfile3
  tabfirst
  copen | only
  clast
  call assert_equal(4, tabpagenr())
  tabfirst | tabonly | enew | only

  call delete('Xqftestfile1')
  call delete('Xqftestfile2')
  call delete('Xqftestfile3')
  set switchbuf&vim

  enew | only
endfunc

func Xadjust_qflnum(cchar)
  call s:setup_commands(a:cchar)

  enew | only

  let fname = 'Xqftestfile' . a:cchar
  call s:create_test_file(fname)
  exe 'edit ' . fname

  Xgetexpr [fname . ':5:Line5',
	      \ fname . ':10:Line10',
	      \ fname . ':15:Line15',
	      \ fname . ':20:Line20']

  6,14delete
  call append(6, ['Buffer', 'Window'])

  let l = g:Xgetlist()

  call assert_equal(5, l[0].lnum)
  call assert_equal(6, l[2].lnum)
  call assert_equal(13, l[3].lnum)

  enew!
  call delete(fname)
endfunc

func Test_adjust_lnum()
  call setloclist(0, [])
  call Xadjust_qflnum('c')
  call setqflist([])
  call Xadjust_qflnum('l')
endfunc

" Tests for the :grep/:lgrep and :grepadd/:lgrepadd commands
func s:test_xgrep(cchar)
  call s:setup_commands(a:cchar)

  " The following lines are used for the grep test. Don't remove.
  " Grep_Test_Text: Match 1
  " Grep_Test_Text: Match 2
  " GrepAdd_Test_Text: Match 1
  " GrepAdd_Test_Text: Match 2
  enew! | only
  set makeef&vim
  silent Xgrep Grep_Test_Text: test_quickfix.vim
  call assert_true(len(g:Xgetlist()) == 3)
  Xopen
  call assert_true(w:quickfix_title =~ '^:grep')
  Xclose
  enew
  set makeef=Temp_File_##
  silent Xgrepadd GrepAdd_Test_Text: test_quickfix.vim
  call assert_true(len(g:Xgetlist()) == 6)
endfunc

func Test_grep()
  if !has('unix')
    " The grepprg may not be set on non-Unix systems
    return
  endif

  call s:test_xgrep('c')
  call s:test_xgrep('l')
endfunc

func Test_two_windows()
  " Use one 'errorformat' for two windows.  Add an expression to each of them,
  " make sure they each keep their own state.
  set efm=%DEntering\ dir\ '%f',%f:%l:%m,%XLeaving\ dir\ '%f'
  call mkdir('Xone/a', 'p')
  call mkdir('Xtwo/a', 'p')
  let lines = ['1', '2', 'one one one', '4', 'two two two', '6', '7']
  call writefile(lines, 'Xone/a/one.txt')
  call writefile(lines, 'Xtwo/a/two.txt')

  new one
  let one_id = win_getid()
  lexpr ""
  new two
  let two_id = win_getid()
  lexpr ""

  laddexpr "Entering dir 'Xtwo/a'"
  call win_gotoid(one_id)
  laddexpr "Entering dir 'Xone/a'"
  call win_gotoid(two_id)
  laddexpr 'two.txt:5:two two two'
  call win_gotoid(one_id)
  laddexpr 'one.txt:3:one one one'

  let loc_one = getloclist(one_id)
  call assert_equal('Xone/a/one.txt', bufname(loc_one[1].bufnr))
  call assert_equal(3, loc_one[1].lnum)

  let loc_two = getloclist(two_id)
  call assert_equal('Xtwo/a/two.txt', bufname(loc_two[1].bufnr))
  call assert_equal(5, loc_two[1].lnum)

  call win_gotoid(one_id)
  bwipe!
  call win_gotoid(two_id)
  bwipe!
  call delete('Xone', 'rf')
  call delete('Xtwo', 'rf')
endfunc

func XbottomTests(cchar)
  call s:setup_commands(a:cchar)

  " Calling lbottom without any errors should fail
  if a:cchar == 'l'
      call assert_fails('lbottom', 'E776:')
  endif

  call g:Xsetlist([{'filename': 'foo', 'lnum': 42}])
  Xopen
  let wid = win_getid()
  call assert_equal(1, line('.'))
  wincmd w
  call g:Xsetlist([{'filename': 'var', 'lnum': 24}], 'a')
  Xbottom
  call win_gotoid(wid)
  call assert_equal(2, line('.'))
  Xclose
endfunc

" Tests for the :cbottom and :lbottom commands
func Test_cbottom()
  call XbottomTests('c')
  call XbottomTests('l')
endfunc

func HistoryTest(cchar)
  call s:setup_commands(a:cchar)

  " clear all lists after the first one, then replace the first one.
  call g:Xsetlist([])
  call assert_fails('Xolder 99', 'E380:')
  let entry = {'filename': 'foo', 'lnum': 42}
  call g:Xsetlist([entry], 'r')
  call g:Xsetlist([entry, entry])
  call g:Xsetlist([entry, entry, entry])
  let res = split(execute(a:cchar . 'hist'), "\n")
  call assert_equal(3, len(res))
  let common = 'errors     :set' . (a:cchar == 'c' ? 'qf' : 'loc') . 'list()'
  call assert_equal('  error list 1 of 3; 1 ' . common, res[0])
  call assert_equal('  error list 2 of 3; 2 ' . common, res[1])
  call assert_equal('> error list 3 of 3; 3 ' . common, res[2])

  " Test for changing the quickfix lists
  call assert_equal(3, g:Xgetlist({'nr' : 0}).nr)
  exe '1' . a:cchar . 'hist'
  call assert_equal(1, g:Xgetlist({'nr' : 0}).nr)
  exe '3' . a:cchar . 'hist'
  call assert_equal(3, g:Xgetlist({'nr' : 0}).nr)
  call assert_fails('-2' . a:cchar . 'hist', 'E16:')
  call assert_fails('4' . a:cchar . 'hist', 'E16:')

  call g:Xsetlist([], 'f')
  let l = split(execute(a:cchar . 'hist'), "\n")
  call assert_equal('No entries', l[0])
  if a:cchar == 'c'
    call assert_fails('4chist', 'E16:')
  else
    call assert_fails('4lhist', 'E776:')
  endif

  " An empty list should still show the stack history
  call g:Xsetlist([])
  let res = split(execute(a:cchar . 'hist'), "\n")
  call assert_equal('> error list 1 of 1; 0 ' . common, res[0])

  call g:Xsetlist([], 'f')
endfunc

func Test_history()
  call HistoryTest('c')
  call HistoryTest('l')
endfunc

func Test_duplicate_buf()
  " make sure we can get the highest buffer number
  edit DoesNotExist
  edit DoesNotExist2
  let last_buffer = bufnr("$")

  " make sure only one buffer is created
  call writefile(['this one', 'that one'], 'Xgrepthis')
  vimgrep one Xgrepthis
  vimgrep one Xgrepthis
  call assert_equal(last_buffer + 1, bufnr("$"))

  call delete('Xgrepthis')
endfunc

" Quickfix/Location list set/get properties tests
func Xproperty_tests(cchar)
    call s:setup_commands(a:cchar)

    " Error cases
    call assert_fails('call g:Xgetlist(99)', 'E715:')
    call assert_fails('call g:Xsetlist(99)', 'E714:')
    call assert_fails('call g:Xsetlist([], "a", [])', 'E715:')

    " Set and get the title
    call g:Xsetlist([])
    Xopen
    wincmd p
    call g:Xsetlist([{'filename':'foo', 'lnum':27}])
    let s = g:Xsetlist([], 'a', {'title' : 'Sample'})
    call assert_equal(0, s)
    let d = g:Xgetlist({"title":1})
    call assert_equal('Sample', d.title)
    " Try setting title to a non-string value
    call assert_equal(-1, g:Xsetlist([], 'a', {'title' : ['Test']}))
    call assert_equal('Sample', g:Xgetlist({"title":1}).title)

    Xopen
    call assert_equal('Sample', w:quickfix_title)
    Xclose

    " Tests for action argument
    silent! Xolder 999
    let qfnr = g:Xgetlist({'all':1}).nr
    call g:Xsetlist([], 'r', {'title' : 'N1'})
    call assert_equal('N1', g:Xgetlist({'all':1}).title)
    call g:Xsetlist([], ' ', {'title' : 'N2'})
    call assert_equal(qfnr + 1, g:Xgetlist({'all':1}).nr)

    let res = g:Xgetlist({'nr': 0})
    call assert_equal(qfnr + 1, res.nr)
    call assert_equal(['nr'], keys(res))

    call g:Xsetlist([], ' ', {'title' : 'N3'})
    call assert_equal('N2', g:Xgetlist({'nr':2, 'title':1}).title)

    " Changing the title of an earlier quickfix list
    call g:Xsetlist([], 'r', {'title' : 'NewTitle', 'nr' : 2})
    call assert_equal('NewTitle', g:Xgetlist({'nr':2, 'title':1}).title)

    " Changing the title of an invalid quickfix list
    call assert_equal(-1, g:Xsetlist([], ' ',
		\ {'title' : 'SomeTitle', 'nr' : 99}))
    call assert_equal(-1, g:Xsetlist([], ' ',
		\ {'title' : 'SomeTitle', 'nr' : 'abc'}))

    if a:cchar == 'c'
	copen
	call assert_equal({'winid':win_getid()}, getqflist({'winid':1}))
	cclose
    endif

    " Invalid arguments
    call assert_fails('call g:Xgetlist([])', 'E715')
    call assert_fails('call g:Xsetlist([], "a", [])', 'E715')
    let s = g:Xsetlist([], 'a', {'abc':1})
    call assert_equal(-1, s)

    call assert_equal({}, g:Xgetlist({'abc':1}))
    call assert_equal('', g:Xgetlist({'nr':99, 'title':1}).title)
    call assert_equal('', g:Xgetlist({'nr':[], 'title':1}).title)

    if a:cchar == 'l'
	call assert_equal({}, getloclist(99, {'title': 1}))
    endif

    " Context related tests
    let s = g:Xsetlist([], 'a', {'context':[1,2,3]})
    call assert_equal(0, s)
    call test_garbagecollect_now()
    let d = g:Xgetlist({'context':1})
    call assert_equal([1,2,3], d.context)
    call g:Xsetlist([], 'a', {'context':{'color':'green'}})
    let d = g:Xgetlist({'context':1})
    call assert_equal({'color':'green'}, d.context)
    call g:Xsetlist([], 'a', {'context':"Context info"})
    let d = g:Xgetlist({'context':1})
    call assert_equal("Context info", d.context)
    call g:Xsetlist([], 'a', {'context':246})
    let d = g:Xgetlist({'context':1})
    call assert_equal(246, d.context)
    if a:cchar == 'l'
	" Test for copying context across two different location lists
	new | only
	let w1_id = win_getid()
	let l = [1]
	call setloclist(0, [], 'a', {'context':l})
	new
	let w2_id = win_getid()
	call add(l, 2)
	call assert_equal([1, 2], getloclist(w1_id, {'context':1}).context)
	call assert_equal([1, 2], getloclist(w2_id, {'context':1}).context)
	unlet! l
	call assert_equal([1, 2], getloclist(w2_id, {'context':1}).context)
	only
	call setloclist(0, [], 'f')
	call assert_equal('', getloclist(0, {'context':1}).context)
    endif

    " Test for changing the context of previous quickfix lists
    call g:Xsetlist([], 'f')
    Xexpr "One"
    Xexpr "Two"
    Xexpr "Three"
    call g:Xsetlist([], 'r', {'context' : [1], 'nr' : 1})
    call g:Xsetlist([], 'a', {'context' : [2], 'nr' : 2})
    " Also, check for setting the context using quickfix list number zero.
    call g:Xsetlist([], 'r', {'context' : [3], 'nr' : 0})
    call test_garbagecollect_now()
    let l = g:Xgetlist({'nr' : 1, 'context' : 1})
    call assert_equal([1], l.context)
    let l = g:Xgetlist({'nr' : 2, 'context' : 1})
    call assert_equal([2], l.context)
    let l = g:Xgetlist({'nr' : 3, 'context' : 1})
    call assert_equal([3], l.context)

    " Test for changing the context through reference and for garbage
    " collection of quickfix context
    let l = ["red"]
    call g:Xsetlist([], ' ', {'context' : l})
    call add(l, "blue")
    let x = g:Xgetlist({'context' : 1})
    call add(x.context, "green")
    call assert_equal(["red", "blue", "green"], l)
    call assert_equal(["red", "blue", "green"], x.context)
    unlet l
    call test_garbagecollect_now()
    let m = g:Xgetlist({'context' : 1})
    call assert_equal(["red", "blue", "green"], m.context)

    " Test for setting/getting items
    Xexpr ""
    let qfprev = g:Xgetlist({'nr':0})
    let s = g:Xsetlist([], ' ', {'title':'Green',
		\ 'items' : [{'filename':'F1', 'lnum':10}]})
    call assert_equal(0, s)
    let qfcur = g:Xgetlist({'nr':0})
    call assert_true(qfcur.nr == qfprev.nr + 1)
    let l = g:Xgetlist({'items':1})
    call assert_equal('F1', bufname(l.items[0].bufnr))
    call assert_equal(10, l.items[0].lnum)
    call g:Xsetlist([], 'a', {'items' : [{'filename':'F2', 'lnum':20},
		\  {'filename':'F2', 'lnum':30}]})
    let l = g:Xgetlist({'items':1})
    call assert_equal('F2', bufname(l.items[2].bufnr))
    call assert_equal(30, l.items[2].lnum)
    call g:Xsetlist([], 'r', {'items' : [{'filename':'F3', 'lnum':40}]})
    let l = g:Xgetlist({'items':1})
    call assert_equal('F3', bufname(l.items[0].bufnr))
    call assert_equal(40, l.items[0].lnum)
    call g:Xsetlist([], 'r', {'items' : []})
    let l = g:Xgetlist({'items':1})
    call assert_equal(0, len(l.items))

    call g:Xsetlist([], 'r', {'title' : 'TestTitle'})
    call g:Xsetlist([], 'r', {'items' : [{'filename' : 'F1', 'lnum' : 10, 'text' : 'L10'}]})
    call g:Xsetlist([], 'r', {'items' : [{'filename' : 'F1', 'lnum' : 10, 'text' : 'L10'}]})
    call assert_equal('TestTitle', g:Xgetlist({'title' : 1}).title)

    " Test for getting id of window associated with a location list window
    if a:cchar == 'l'
      only
      call assert_equal(0, g:Xgetlist({'all' : 1}).filewinid)
      let wid = win_getid()
      Xopen
      call assert_equal(wid, g:Xgetlist({'filewinid' : 1}).filewinid)
      wincmd w
      call assert_equal(0, g:Xgetlist({'filewinid' : 1}).filewinid)
      only
    endif

    " The following used to crash Vim with address sanitizer
    call g:Xsetlist([], 'f')
    call g:Xsetlist([], 'a', {'items' : [{'filename':'F1', 'lnum':10}]})
    call assert_equal(10, g:Xgetlist({'items':1}).items[0].lnum)

    " Try setting the items using a string
    call assert_equal(-1, g:Xsetlist([], ' ', {'items' : 'Test'}))

    " Save and restore the quickfix stack
    call g:Xsetlist([], 'f')
    call assert_equal(0, g:Xgetlist({'nr':'$'}).nr)
    Xexpr "File1:10:Line1"
    Xexpr "File2:20:Line2"
    Xexpr "File3:30:Line3"
    let last_qf = g:Xgetlist({'nr':'$'}).nr
    call assert_equal(3, last_qf)
    let qstack = []
    for i in range(1, last_qf)
	let qstack = add(qstack, g:Xgetlist({'nr':i, 'all':1}))
    endfor
    call g:Xsetlist([], 'f')
    for i in range(len(qstack))
	call g:Xsetlist([], ' ', qstack[i])
    endfor
    call assert_equal(3, g:Xgetlist({'nr':'$'}).nr)
    call assert_equal(10, g:Xgetlist({'nr':1, 'items':1}).items[0].lnum)
    call assert_equal(20, g:Xgetlist({'nr':2, 'items':1}).items[0].lnum)
    call assert_equal(30, g:Xgetlist({'nr':3, 'items':1}).items[0].lnum)
    call g:Xsetlist([], 'f')

    " Swap two quickfix lists
    Xexpr "File1:10:Line10"
    Xexpr "File2:20:Line20"
    Xexpr "File3:30:Line30"
    call g:Xsetlist([], 'r', {'nr':1,'title':'Colors','context':['Colors']})
    call g:Xsetlist([], 'r', {'nr':2,'title':'Fruits','context':['Fruits']})
    let l1=g:Xgetlist({'nr':1,'all':1})
    let l2=g:Xgetlist({'nr':2,'all':1})
    let save_id = l1.id
    let l1.id=l2.id
    let l2.id=save_id
    call g:Xsetlist([], 'r', l1)
    call g:Xsetlist([], 'r', l2)
    let newl1=g:Xgetlist({'nr':1,'all':1})
    let newl2=g:Xgetlist({'nr':2,'all':1})
    call assert_equal('Fruits', newl1.title)
    call assert_equal(['Fruits'], newl1.context)
    call assert_equal('Line20', newl1.items[0].text)
    call assert_equal('Colors', newl2.title)
    call assert_equal(['Colors'], newl2.context)
    call assert_equal('Line10', newl2.items[0].text)
    call g:Xsetlist([], 'f')
endfunc

func Test_qf_property()
    call Xproperty_tests('c')
    call Xproperty_tests('l')
endfunc

" Test for setting the current index in the location/quickfix list
func Xtest_setqfidx(cchar)
  call s:setup_commands(a:cchar)

  Xgetexpr "F1:10:1:Line1\nF2:20:2:Line2\nF3:30:3:Line3"
  Xgetexpr "F4:10:1:Line1\nF5:20:2:Line2\nF6:30:3:Line3"
  Xgetexpr "F7:10:1:Line1\nF8:20:2:Line2\nF9:30:3:Line3"

  call g:Xsetlist([], 'a', {'nr' : 3, 'idx' : 2})
  call g:Xsetlist([], 'a', {'nr' : 2, 'idx' : 2})
  call g:Xsetlist([], 'a', {'nr' : 1, 'idx' : 3})
  Xolder 2
  Xopen
  call assert_equal(3, line('.'))
  Xnewer
  call assert_equal(2, line('.'))
  Xnewer
  call assert_equal(2, line('.'))
  " Update the current index with the quickfix window open
  wincmd w
  call g:Xsetlist([], 'a', {'nr' : 3, 'idx' : 3})
  Xopen
  call assert_equal(3, line('.'))
  Xclose

  " Set the current index to the last entry
  call g:Xsetlist([], 'a', {'nr' : 1, 'idx' : '$'})
  call assert_equal(3, g:Xgetlist({'nr' : 1, 'idx' : 0}).idx)
  " A large value should set the index to the last index
  call g:Xsetlist([], 'a', {'nr' : 1, 'idx' : 1})
  call g:Xsetlist([], 'a', {'nr' : 1, 'idx' : 999})
  call assert_equal(3, g:Xgetlist({'nr' : 1, 'idx' : 0}).idx)
  " Invalid index values
  call g:Xsetlist([], 'a', {'nr' : 1, 'idx' : -1})
  call assert_equal(3, g:Xgetlist({'nr' : 1, 'idx' : 0}).idx)
  call g:Xsetlist([], 'a', {'nr' : 1, 'idx' : 0})
  call assert_equal(3, g:Xgetlist({'nr' : 1, 'idx' : 0}).idx)
  call g:Xsetlist([], 'a', {'nr' : 1, 'idx' : 'xx'})
  call assert_equal(3, g:Xgetlist({'nr' : 1, 'idx' : 0}).idx)
  call assert_fails("call g:Xsetlist([], 'a', {'nr':1, 'idx':[]})", 'E745:')

  call g:Xsetlist([], 'f')
  new | only
endfunc

func Test_setqfidx()
  call Xtest_setqfidx('c')
  call Xtest_setqfidx('l')
endfunc

" Tests for the QuickFixCmdPre/QuickFixCmdPost autocommands
func QfAutoCmdHandler(loc, cmd)
  call add(g:acmds, a:loc . a:cmd)
endfunc

func Test_Autocmd()
  autocmd QuickFixCmdPre * call QfAutoCmdHandler('pre', expand('<amatch>'))
  autocmd QuickFixCmdPost * call QfAutoCmdHandler('post', expand('<amatch>'))

  let g:acmds = []
  cexpr "F1:10:Line 10"
  caddexpr "F1:20:Line 20"
  cgetexpr "F1:30:Line 30"
  cexpr ""
  caddexpr ""
  cgetexpr ""
  silent! cexpr non_existing_func()
  silent! caddexpr non_existing_func()
  silent! cgetexpr non_existing_func()
  let l = ['precexpr',
	      \ 'postcexpr',
	      \ 'precaddexpr',
	      \ 'postcaddexpr',
	      \ 'precgetexpr',
	      \ 'postcgetexpr',
	      \ 'precexpr',
	      \ 'postcexpr',
	      \ 'precaddexpr',
	      \ 'postcaddexpr',
	      \ 'precgetexpr',
	      \ 'postcgetexpr',
	      \ 'precexpr',
	      \ 'precaddexpr',
	      \ 'precgetexpr']
  call assert_equal(l, g:acmds)

  let g:acmds = []
  enew! | call append(0, "F2:10:Line 10")
  cbuffer!
  enew! | call append(0, "F2:20:Line 20")
  cgetbuffer
  enew! | call append(0, "F2:30:Line 30")
  caddbuffer
  new
  let bnum = bufnr('%')
  bunload
  exe 'silent! cbuffer! ' . bnum
  exe 'silent! cgetbuffer ' . bnum
  exe 'silent! caddbuffer ' . bnum
  enew!
  let l = ['precbuffer',
	      \ 'postcbuffer',
	      \ 'precgetbuffer',
	      \ 'postcgetbuffer',
	      \ 'precaddbuffer',
	      \ 'postcaddbuffer',
	      \ 'precbuffer',
	      \ 'precgetbuffer',
	      \ 'precaddbuffer']
  call assert_equal(l, g:acmds)

  call writefile(['Xtest:1:Line1'], 'Xtest')
  call writefile([], 'Xempty')
  let g:acmds = []
  cfile Xtest
  caddfile Xtest
  cgetfile Xtest
  cfile Xempty
  caddfile Xempty
  cgetfile Xempty
  silent! cfile do_not_exist
  silent! caddfile do_not_exist
  silent! cgetfile do_not_exist
  let l = ['precfile',
	      \ 'postcfile',
	      \ 'precaddfile',
	      \ 'postcaddfile',
	      \ 'precgetfile',
	      \ 'postcgetfile',
	      \ 'precfile',
	      \ 'postcfile',
	      \ 'precaddfile',
	      \ 'postcaddfile',
	      \ 'precgetfile',
	      \ 'postcgetfile',
	      \ 'precfile',
	      \ 'postcfile',
	      \ 'precaddfile',
	      \ 'postcaddfile',
	      \ 'precgetfile',
	      \ 'postcgetfile']
  call assert_equal(l, g:acmds)

  let g:acmds = []
  helpgrep quickfix
  silent! helpgrep non_existing_help_topic
  vimgrep test Xtest
  vimgrepadd test Xtest
  silent! vimgrep non_existing_test Xtest
  silent! vimgrepadd non_existing_test Xtest
  set makeprg=
  silent! make
  set makeprg&
  let l = ['prehelpgrep',
	      \ 'posthelpgrep',
	      \ 'prehelpgrep',
	      \ 'posthelpgrep',
	      \ 'previmgrep',
	      \ 'postvimgrep',
	      \ 'previmgrepadd',
	      \ 'postvimgrepadd',
	      \ 'previmgrep',
	      \ 'postvimgrep',
	      \ 'previmgrepadd',
	      \ 'postvimgrepadd',
	      \ 'premake',
	      \ 'postmake']
  call assert_equal(l, g:acmds)

  if has('unix')
    " Run this test only on Unix-like systems. The grepprg may not be set on
    " non-Unix systems.
    " The following lines are used for the grep test. Don't remove.
    " Grep_Autocmd_Text: Match 1
    " GrepAdd_Autocmd_Text: Match 2
    let g:acmds = []
    silent grep Grep_Autocmd_Text test_quickfix.vim
    silent grepadd GrepAdd_Autocmd_Text test_quickfix.vim
    silent grep abc123def Xtest
    silent grepadd abc123def Xtest
    let l = ['pregrep',
		\ 'postgrep',
		\ 'pregrepadd',
		\ 'postgrepadd',
		\ 'pregrep',
		\ 'postgrep',
		\ 'pregrepadd',
		\ 'postgrepadd']
    call assert_equal(l, g:acmds)
  endif

  call delete('Xtest')
  call delete('Xempty')
  au! QuickFixCmdPre
  au! QuickFixCmdPost
endfunc

func Test_Autocmd_Exception()
  set efm=%m
  lgetexpr '?'

  try
    call DoesNotExit()
  catch
    lgetexpr '1'
  finally
    lgetexpr '1'
  endtry

  call assert_equal('1', getloclist(0)[0].text)

  set efm&vim
endfunc

func Test_caddbuffer_wrong()
  " This used to cause a memory access in freed memory.
  let save_efm = &efm
  set efm=%EEEE%m,%WWWW,%+CCCC%>%#,%GGGG%.#
  cgetexpr ['WWWW', 'EEEE', 'CCCC']
  let &efm = save_efm
  caddbuffer
  bwipe!
endfunc

func Test_caddexpr_wrong()
  " This used to cause a memory access in freed memory.
  cbuffer
  cbuffer
  copen
  let save_efm = &efm
  set efm=%
  call assert_fails('caddexpr ""', 'E376:')
  let &efm = save_efm
endfunc

func Test_dirstack_cleanup()
  " This used to cause a memory access in freed memory.
  let save_efm = &efm
  lexpr '0'
  lopen
  fun X(c)
    let save_efm=&efm
    set efm=%D%f
    if a:c == 'c'
      caddexpr '::'
    else
      laddexpr ':0:0'
    endif
    let &efm=save_efm
  endfun
  call X('c')
  call X('l')
  call setqflist([], 'r')
  caddbuffer
  let &efm = save_efm
endfunc

" Tests for jumping to entries from the location list window and quickfix
" window
func Test_cwindow_jump()
  set efm=%f%%%l%%%m
  lgetexpr ["F1%10%Line 10", "F2%20%Line 20", "F3%30%Line 30"]
  lopen | only
  lfirst
  call assert_true(winnr('$') == 2)
  call assert_true(winnr() == 1)
  " Location list for the new window should be set
  call assert_true(getloclist(0)[2].text == 'Line 30')

  " Open a scratch buffer
  " Open a new window and create a location list
  " Open the location list window and close the other window
  " Jump to an entry.
  " Should create a new window and jump to the entry. The scratch buffer
  " should not be used.
  enew | only
  set buftype=nofile
  below new
  lgetexpr ["F1%10%Line 10", "F2%20%Line 20", "F3%30%Line 30"]
  lopen
  2wincmd c
  lnext
  call assert_true(winnr('$') == 3)
  call assert_true(winnr() == 2)

  " Open two windows with two different location lists
  " Open the location list window and close the previous window
  " Jump to an entry in the location list window
  " Should open the file in the first window and not set the location list.
  enew | only
  lgetexpr ["F1%5%Line 5"]
  below new
  lgetexpr ["F1%10%Line 10", "F2%20%Line 20", "F3%30%Line 30"]
  lopen
  2wincmd c
  lnext
  call assert_true(winnr() == 1)
  call assert_true(getloclist(0)[0].text == 'Line 5')

  enew | only
  cgetexpr ["F1%10%Line 10", "F2%20%Line 20", "F3%30%Line 30"]
  copen
  cnext
  call assert_true(winnr('$') == 2)
  call assert_true(winnr() == 1)

  enew | only
  set efm&vim
endfunc

func Test_cwindow_highlight()
  CheckScreendump

  let lines =<< trim END
	set t_u7=
	call setline(1, ['some', 'text', 'with', 'matches'])
	write XCwindow
	vimgrep e XCwindow
	redraw
	cwindow 4
  END
  call writefile(lines, 'XtestCwindow')
  let buf = RunVimInTerminal('-S XtestCwindow', #{rows: 12})
  call VerifyScreenDump(buf, 'Test_quickfix_cwindow_1', {})

  call term_sendkeys(buf, ":cnext\<CR>")
  call VerifyScreenDump(buf, 'Test_quickfix_cwindow_2', {})

  " clean up
  call StopVimInTerminal(buf)
  call delete('XtestCwindow')
  call delete('XCwindow')
endfunc

func XvimgrepTests(cchar)
  call s:setup_commands(a:cchar)

  call writefile(['Editor:VIM vim',
	      \ 'Editor:Emacs EmAcS',
	      \ 'Editor:Notepad NOTEPAD'], 'Xtestfile1')
  call writefile(['Linux', 'MacOS', 'MS-Windows'], 'Xtestfile2')

  " Error cases
  call assert_fails('Xvimgrep /abc *', 'E682:')

  let @/=''
  call assert_fails('Xvimgrep // *', 'E35:')

  call assert_fails('Xvimgrep abc', 'E683:')
  call assert_fails('Xvimgrep a1b2c3 Xtestfile1', 'E480:')
  call assert_fails('Xvimgrep pat Xa1b2c3', 'E480:')

  Xexpr ""
  Xvimgrepadd Notepad Xtestfile1
  Xvimgrepadd MacOS Xtestfile2
  let l = g:Xgetlist()
  call assert_equal(2, len(l))
  call assert_equal('Editor:Notepad NOTEPAD', l[0].text)

  Xvimgrep #\cvim#g Xtestfile?
  let l = g:Xgetlist()
  call assert_equal(2, len(l))
  call assert_equal(8, l[0].col)
  call assert_equal(12, l[1].col)

  1Xvimgrep ?Editor? Xtestfile*
  let l = g:Xgetlist()
  call assert_equal(1, len(l))
  call assert_equal('Editor:VIM vim', l[0].text)

  edit +3 Xtestfile2
  Xvimgrep +\cemacs+j Xtestfile1
  let l = g:Xgetlist()
  call assert_equal('Xtestfile2', bufname(''))
  call assert_equal('Editor:Emacs EmAcS', l[0].text)

  " Test for unloading a buffer after vimgrep searched the buffer
  %bwipe
  Xvimgrep /Editor/j Xtestfile*
  call assert_equal(0, getbufinfo('Xtestfile1')[0].loaded)
  call assert_equal([], getbufinfo('Xtestfile2'))

  call delete('Xtestfile1')
  call delete('Xtestfile2')
endfunc

" Tests for the :vimgrep command
func Test_vimgrep()
  call XvimgrepTests('c')
  call XvimgrepTests('l')
endfunc

" Test for incsearch highlighting of the :vimgrep pattern
" This test used to cause "E315: ml_get: invalid lnum" errors.
func Test_vimgrep_incsearch()
  enew
  set incsearch
  call test_override("char_avail", 1)

  call feedkeys(":2vimgrep assert test_quickfix.vim test_cdo.vim\<CR>", "ntx")
  let l = getqflist()
  call assert_equal(2, len(l))

  call test_override("ALL", 0)
  set noincsearch
endfunc

func XfreeTests(cchar)
  call s:setup_commands(a:cchar)

  enew | only

  " Deleting the quickfix stack should work even When the current list is
  " somewhere in the middle of the stack
  Xexpr ['Xfile1:10:10:Line 10', 'Xfile1:15:15:Line 15']
  Xexpr ['Xfile2:20:20:Line 20', 'Xfile2:25:25:Line 25']
  Xexpr ['Xfile3:30:30:Line 30', 'Xfile3:35:35:Line 35']
  Xolder
  call g:Xsetlist([], 'f')
  call assert_equal(0, len(g:Xgetlist()))

  " After deleting the stack, adding a new list should create a stack with a
  " single list.
  Xexpr ['Xfile1:10:10:Line 10', 'Xfile1:15:15:Line 15']
  call assert_equal(1, g:Xgetlist({'all':1}).nr)

  " Deleting the stack from a quickfix window should update/clear the
  " quickfix/location list window.
  Xexpr ['Xfile1:10:10:Line 10', 'Xfile1:15:15:Line 15']
  Xexpr ['Xfile2:20:20:Line 20', 'Xfile2:25:25:Line 25']
  Xexpr ['Xfile3:30:30:Line 30', 'Xfile3:35:35:Line 35']
  Xolder
  Xwindow
  call g:Xsetlist([], 'f')
  call assert_equal(2, winnr('$'))
  call assert_equal(1, line('$'))
  Xclose

  " Deleting the stack from a non-quickfix window should update/clear the
  " quickfix/location list window.
  Xexpr ['Xfile1:10:10:Line 10', 'Xfile1:15:15:Line 15']
  Xexpr ['Xfile2:20:20:Line 20', 'Xfile2:25:25:Line 25']
  Xexpr ['Xfile3:30:30:Line 30', 'Xfile3:35:35:Line 35']
  Xolder
  Xwindow
  wincmd p
  call g:Xsetlist([], 'f')
  call assert_equal(0, len(g:Xgetlist()))
  wincmd p
  call assert_equal(2, winnr('$'))
  call assert_equal(1, line('$'))

  " After deleting the location list stack, if the location list window is
  " opened, then a new location list should be created. So opening the
  " location list window again should not create a new window.
  if a:cchar == 'l'
      lexpr ['Xfile1:10:10:Line 10', 'Xfile1:15:15:Line 15']
      wincmd p
      lopen
      call assert_equal(2, winnr('$'))
  endif
  Xclose
endfunc

" Tests for the quickfix free functionality
func Test_qf_free()
  call XfreeTests('c')
  call XfreeTests('l')
endfunc

" Test for buffer overflow when parsing lines and adding new entries to
" the quickfix list.
func Test_bufoverflow()
  set efm=%f:%l:%m
  cgetexpr ['File1:100:' . repeat('x', 1025)]

  set efm=%+GCompiler:\ %.%#,%f:%l:%m
  cgetexpr ['Compiler: ' . repeat('a', 1015), 'File1:10:Hello World']

  set efm=%DEntering\ directory\ %f,%f:%l:%m
  cgetexpr ['Entering directory ' . repeat('a', 1006),
	      \ 'File1:10:Hello World']
  set efm&vim
endfunc

" Tests for getting the quickfix stack size
func XsizeTests(cchar)
  call s:setup_commands(a:cchar)

  call g:Xsetlist([], 'f')
  call assert_equal(0, g:Xgetlist({'nr':'$'}).nr)
  call assert_equal('', g:Xgetlist({'nr':'$', 'all':1}).title)
  call assert_equal(0, g:Xgetlist({'nr':0}).nr)

  Xexpr "File1:10:Line1"
  Xexpr "File2:20:Line2"
  Xexpr "File3:30:Line3"
  Xolder | Xolder
  call assert_equal(3, g:Xgetlist({'nr':'$'}).nr)
  call g:Xsetlist([], 'f')

  Xexpr "File1:10:Line1"
  Xexpr "File2:20:Line2"
  Xexpr "File3:30:Line3"
  Xolder | Xolder
  call g:Xsetlist([], 'a', {'nr':'$', 'title':'Compiler'})
  call assert_equal('Compiler', g:Xgetlist({'nr':3, 'all':1}).title)
endfunc

func Test_Qf_Size()
  call XsizeTests('c')
  call XsizeTests('l')
endfunc

func Test_cclose_from_copen()
    augroup QF_Test
	au!
        au FileType qf :call assert_fails(':cclose', 'E788')
    augroup END
    copen
    augroup QF_Test
	au!
    augroup END
    augroup! QF_Test
endfunc

func Test_cclose_in_autocmd()
  " Problem is only triggered if "starting" is zero, so that the OptionsSet
  " event will be triggered.
  call test_override('starting', 1)
  augroup QF_Test
    au!
    au FileType qf :call assert_fails(':cclose', 'E788')
  augroup END
  copen
  augroup QF_Test
    au!
  augroup END
  augroup! QF_Test
  call test_override('starting', 0)
endfunc

" Check that ":file" without an argument is possible even when "curbuf_lock"
" is set.
func Test_file_from_copen()
  " Works without argument.
  augroup QF_Test
    au!
    au FileType qf file
  augroup END
  copen

  augroup QF_Test
    au!
  augroup END
  cclose

  " Fails with argument.
  augroup QF_Test
    au!
    au FileType qf call assert_fails(':file foo', 'E788')
  augroup END
  copen
  augroup QF_Test
    au!
  augroup END
  cclose

  augroup! QF_Test
endfunction

func Test_resize_from_copen()
    augroup QF_Test
	au!
        au FileType qf resize 5
    augroup END
    try
	" This should succeed without any exception.  No other buffers are
	" involved in the autocmd.
	copen
    finally
	augroup QF_Test
	    au!
	augroup END
	augroup! QF_Test
    endtry
endfunc

" Tests for the quickfix buffer b:changedtick variable
func Xchangedtick_tests(cchar)
  call s:setup_commands(a:cchar)

  new | only

  Xexpr "" | Xexpr "" | Xexpr ""

  Xopen
  Xolder
  Xolder
  Xaddexpr "F1:10:Line10"
  Xaddexpr "F2:20:Line20"
  call g:Xsetlist([{"filename":"F3", "lnum":30, "text":"Line30"}], 'a')
  call g:Xsetlist([], 'f')
  call assert_equal(8, getbufvar('%', 'changedtick'))
  Xclose
endfunc

func Test_changedtick()
  call Xchangedtick_tests('c')
  call Xchangedtick_tests('l')
endfunc

" Tests for parsing an expression using setqflist()
func Xsetexpr_tests(cchar)
  call s:setup_commands(a:cchar)

  let t = ["File1:10:Line10", "File1:20:Line20"]
  call g:Xsetlist([], ' ', {'lines' : t})
  call g:Xsetlist([], 'a', {'lines' : ["File1:30:Line30"]})

  let l = g:Xgetlist()
  call assert_equal(3, len(l))
  call assert_equal(20, l[1].lnum)
  call assert_equal('Line30', l[2].text)
  call g:Xsetlist([], 'r', {'lines' : ["File2:5:Line5"]})
  let l = g:Xgetlist()
  call assert_equal(1, len(l))
  call assert_equal('Line5', l[0].text)
  call assert_equal(-1, g:Xsetlist([], 'a', {'lines' : 10}))
  call assert_equal(-1, g:Xsetlist([], 'a', {'lines' : "F1:10:L10"}))

  call g:Xsetlist([], 'f')
  " Add entries to multiple lists
  call g:Xsetlist([], 'a', {'nr' : 1, 'lines' : ["File1:10:Line10"]})
  call g:Xsetlist([], 'a', {'nr' : 2, 'lines' : ["File2:20:Line20"]})
  call g:Xsetlist([], 'a', {'nr' : 1, 'lines' : ["File1:15:Line15"]})
  call g:Xsetlist([], 'a', {'nr' : 2, 'lines' : ["File2:25:Line25"]})
  call assert_equal('Line15', g:Xgetlist({'nr':1, 'items':1}).items[1].text)
  call assert_equal('Line25', g:Xgetlist({'nr':2, 'items':1}).items[1].text)

  " Adding entries using a custom efm
  set efm&
  call g:Xsetlist([], ' ', {'efm' : '%f#%l#%m',
				\ 'lines' : ["F1#10#L10", "F2#20#L20"]})
  call assert_equal(20, g:Xgetlist({'items':1}).items[1].lnum)
  call g:Xsetlist([], 'a', {'efm' : '%f#%l#%m', 'lines' : ["F3:30:L30"]})
  call assert_equal('F3:30:L30', g:Xgetlist({'items':1}).items[2].text)
  call assert_equal(20, g:Xgetlist({'items':1}).items[1].lnum)
  call assert_equal(-1, g:Xsetlist([], 'a', {'efm' : [],
				\ 'lines' : ['F1:10:L10']}))
endfunc

func Test_setexpr()
  call Xsetexpr_tests('c')
  call Xsetexpr_tests('l')
endfunc

" Tests for per quickfix/location list directory stack
func Xmultidirstack_tests(cchar)
  call s:setup_commands(a:cchar)

  call g:Xsetlist([], 'f')
  Xexpr "" | Xexpr ""

  call g:Xsetlist([], 'a', {'nr' : 1, 'lines' : ["Entering dir 'Xone/a'"]})
  call g:Xsetlist([], 'a', {'nr' : 2, 'lines' : ["Entering dir 'Xtwo/a'"]})
  call g:Xsetlist([], 'a', {'nr' : 1, 'lines' : ["one.txt:3:one one one"]})
  call g:Xsetlist([], 'a', {'nr' : 2, 'lines' : ["two.txt:5:two two two"]})

  let l1 = g:Xgetlist({'nr':1, 'items':1})
  let l2 = g:Xgetlist({'nr':2, 'items':1})
  call assert_equal('Xone/a/one.txt', bufname(l1.items[1].bufnr))
  call assert_equal(3, l1.items[1].lnum)
  call assert_equal('Xtwo/a/two.txt', bufname(l2.items[1].bufnr))
  call assert_equal(5, l2.items[1].lnum)
endfunc

func Test_multidirstack()
  call mkdir('Xone/a', 'p')
  call mkdir('Xtwo/a', 'p')
  let lines = ['1', '2', 'one one one', '4', 'two two two', '6', '7']
  call writefile(lines, 'Xone/a/one.txt')
  call writefile(lines, 'Xtwo/a/two.txt')
  let save_efm = &efm
  set efm=%DEntering\ dir\ '%f',%f:%l:%m,%XLeaving\ dir\ '%f'

  call Xmultidirstack_tests('c')
  call Xmultidirstack_tests('l')

  let &efm = save_efm
  call delete('Xone', 'rf')
  call delete('Xtwo', 'rf')
endfunc

" Tests for per quickfix/location list file stack
func Xmultifilestack_tests(cchar)
  call s:setup_commands(a:cchar)

  call g:Xsetlist([], 'f')
  Xexpr "" | Xexpr ""

  call g:Xsetlist([], 'a', {'nr' : 1, 'lines' : ["[one.txt]"]})
  call g:Xsetlist([], 'a', {'nr' : 2, 'lines' : ["[two.txt]"]})
  call g:Xsetlist([], 'a', {'nr' : 1, 'lines' : ["(3,5) one one one"]})
  call g:Xsetlist([], 'a', {'nr' : 2, 'lines' : ["(5,9) two two two"]})

  let l1 = g:Xgetlist({'nr':1, 'items':1})
  let l2 = g:Xgetlist({'nr':2, 'items':1})
  call assert_equal('one.txt', bufname(l1.items[1].bufnr))
  call assert_equal(3, l1.items[1].lnum)
  call assert_equal('two.txt', bufname(l2.items[1].bufnr))
  call assert_equal(5, l2.items[1].lnum)

  " Test for start of a new error line in the same line where a previous
  " error line ends with a file stack.
  let efm_val = 'Error\ l%l\ in\ %f,'
  let efm_val .= '%-P%>(%f%r,Error\ l%l\ in\ %m,%-Q)%r'
  let l = g:Xgetlist({'lines' : [
	      \ '(one.txt',
	      \ 'Error l4 in one.txt',
	      \ ') (two.txt',
	      \ 'Error l6 in two.txt',
	      \ ')',
	      \ 'Error l8 in one.txt'
	      \ ], 'efm' : efm_val})
  call assert_equal(3, len(l.items))
  call assert_equal('one.txt', bufname(l.items[0].bufnr))
  call assert_equal(4, l.items[0].lnum)
  call assert_equal('one.txt', l.items[0].text)
  call assert_equal('two.txt', bufname(l.items[1].bufnr))
  call assert_equal(6, l.items[1].lnum)
  call assert_equal('two.txt', l.items[1].text)
  call assert_equal('one.txt', bufname(l.items[2].bufnr))
  call assert_equal(8, l.items[2].lnum)
  call assert_equal('', l.items[2].text)
endfunc

func Test_multifilestack()
  let lines = ['1', '2', 'one one one', '4', 'two two two', '6', '7']
  call writefile(lines, 'one.txt')
  call writefile(lines, 'two.txt')
  let save_efm = &efm
  set efm=%+P[%f],(%l\\,%c)\ %m,%-Q

  call Xmultifilestack_tests('c')
  call Xmultifilestack_tests('l')

  let &efm = save_efm
  call delete('one.txt')
  call delete('two.txt')
endfunc

" Tests for per buffer 'efm' setting
func Test_perbuf_efm()
  call writefile(["File1-10-Line10"], 'one.txt')
  call writefile(["File2#20#Line20"], 'two.txt')
  set efm=%f#%l#%m
  new | only
  new
  setlocal efm=%f-%l-%m
  cfile one.txt
  wincmd w
  caddfile two.txt

  let l = getqflist()
  call assert_equal(10, l[0].lnum)
  call assert_equal('Line20', l[1].text)

  set efm&
  new | only
  call delete('one.txt')
  call delete('two.txt')
endfunc

" Open multiple help windows using ":lhelpgrep
" This test used to crash Vim
func Test_Multi_LL_Help()
    new | only
    lhelpgrep window
    lopen
    e#
    lhelpgrep buffer
    call assert_equal(3, winnr('$'))
    call assert_true(len(getloclist(1)) != 0)
    call assert_true(len(getloclist(2)) != 0)
    new | only
endfunc

" Tests for adding new quickfix lists using setqflist()
func XaddQf_tests(cchar)
  call s:setup_commands(a:cchar)

  " Create a new list using ' ' for action
  call g:Xsetlist([], 'f')
  call g:Xsetlist([], ' ', {'title' : 'Test1'})
  let l = g:Xgetlist({'nr' : '$', 'all' : 1})
  call assert_equal(1, l.nr)
  call assert_equal('Test1', l.title)

  " Create a new list using ' ' for action and '$' for 'nr'
  call g:Xsetlist([], 'f')
  call g:Xsetlist([], ' ', {'title' : 'Test2', 'nr' : '$'})
  let l = g:Xgetlist({'nr' : '$', 'all' : 1})
  call assert_equal(1, l.nr)
  call assert_equal('Test2', l.title)

  " Create a new list using 'a' for action
  call g:Xsetlist([], 'f')
  call g:Xsetlist([], 'a', {'title' : 'Test3'})
  let l = g:Xgetlist({'nr' : '$', 'all' : 1})
  call assert_equal(1, l.nr)
  call assert_equal('Test3', l.title)

  " Create a new list using 'a' for action and '$' for 'nr'
  call g:Xsetlist([], 'f')
  call g:Xsetlist([], 'a', {'title' : 'Test3', 'nr' : '$'})
  call g:Xsetlist([], 'a', {'title' : 'Test4'})
  let l = g:Xgetlist({'nr' : '$', 'all' : 1})
  call assert_equal(1, l.nr)
  call assert_equal('Test4', l.title)

  " Adding a quickfix list should remove all the lists following the current
  " list.
  Xexpr "" | Xexpr "" | Xexpr ""
  silent! 10Xolder
  call g:Xsetlist([], ' ', {'title' : 'Test5'})
  let l = g:Xgetlist({'nr' : '$', 'all' : 1})
  call assert_equal(2, l.nr)
  call assert_equal('Test5', l.title)

  " Add a quickfix list using '$' as the list number.
  let lastqf = g:Xgetlist({'nr':'$'}).nr
  silent! 99Xolder
  call g:Xsetlist([], ' ', {'nr' : '$', 'title' : 'Test6'})
  let l = g:Xgetlist({'nr' : '$', 'all' : 1})
  call assert_equal(lastqf + 1, l.nr)
  call assert_equal('Test6', l.title)

  " Add a quickfix list using 'nr' set to one more than the quickfix
  " list size.
  let lastqf = g:Xgetlist({'nr':'$'}).nr
  silent! 99Xolder
  call g:Xsetlist([], ' ', {'nr' : lastqf + 1, 'title' : 'Test7'})
  let l = g:Xgetlist({'nr' : '$', 'all' : 1})
  call assert_equal(lastqf + 1, l.nr)
  call assert_equal('Test7', l.title)

  " Add a quickfix list to a stack with 10 lists using 'nr' set to '$'
  exe repeat('Xexpr "" |', 9) . 'Xexpr ""'
  silent! 99Xolder
  call g:Xsetlist([], ' ', {'nr' : '$', 'title' : 'Test8'})
  let l = g:Xgetlist({'nr' : '$', 'all' : 1})
  call assert_equal(10, l.nr)
  call assert_equal('Test8', l.title)

  " Add a quickfix list using 'nr' set to a value greater than 10
  call assert_equal(-1, g:Xsetlist([], ' ', {'nr' : 12, 'title' : 'Test9'}))

  " Try adding a quickfix list with 'nr' set to a value greater than the
  " quickfix list size but less than 10.
  call g:Xsetlist([], 'f')
  Xexpr "" | Xexpr "" | Xexpr ""
  silent! 99Xolder
  call assert_equal(-1, g:Xsetlist([], ' ', {'nr' : 8, 'title' : 'Test10'}))

  " Add a quickfix list using 'nr' set to a some string or list
  call assert_equal(-1, g:Xsetlist([], ' ', {'nr' : [1,2], 'title' : 'Test11'}))
endfunc

func Test_add_qf()
  call XaddQf_tests('c')
  call XaddQf_tests('l')
endfunc

" Test for getting the quickfix list items from some text without modifying
" the quickfix stack
func XgetListFromLines(cchar)
  call s:setup_commands(a:cchar)
  call g:Xsetlist([], 'f')

  let l = g:Xgetlist({'lines' : ["File2:20:Line20", "File2:30:Line30"]}).items
  call assert_equal(2, len(l))
  call assert_equal(30, l[1].lnum)

  call assert_equal({}, g:Xgetlist({'lines' : 10}))
  call assert_equal({}, g:Xgetlist({'lines' : 'File1:10:Line10'}))
  call assert_equal([], g:Xgetlist({'lines' : []}).items)
  call assert_equal([], g:Xgetlist({'lines' : [10, 20]}).items)

  " Parse text using a custom efm
  set efm&
  let l = g:Xgetlist({'lines':['File3#30#Line30'], 'efm' : '%f#%l#%m'}).items
  call assert_equal('Line30', l[0].text)
  let l = g:Xgetlist({'lines':['File3:30:Line30'], 'efm' : '%f-%l-%m'}).items
  call assert_equal('File3:30:Line30', l[0].text)
  let l = g:Xgetlist({'lines':['File3:30:Line30'], 'efm' : [1,2]})
  call assert_equal({}, l)
  call assert_fails("call g:Xgetlist({'lines':['abc'], 'efm':'%2'})", 'E376:')
  call assert_fails("call g:Xgetlist({'lines':['abc'], 'efm':''})", 'E378:')

  " Make sure that the quickfix stack is not modified
  call assert_equal(0, g:Xgetlist({'nr' : '$'}).nr)
endfunc

func Test_get_list_from_lines()
  call XgetListFromLines('c')
  call XgetListFromLines('l')
endfunc

" Tests for the quickfix list id
func Xqfid_tests(cchar)
  call s:setup_commands(a:cchar)

  call g:Xsetlist([], 'f')
  call assert_equal(0, g:Xgetlist({'id':0}).id)
  Xexpr ''
  let start_id = g:Xgetlist({'id' : 0}).id
  Xexpr '' | Xexpr ''
  Xolder
  call assert_equal(start_id, g:Xgetlist({'id':0, 'nr':1}).id)
  call assert_equal(start_id + 1, g:Xgetlist({'id':0, 'nr':0}).id)
  call assert_equal(start_id + 2, g:Xgetlist({'id':0, 'nr':'$'}).id)
  call assert_equal(0, g:Xgetlist({'id':0, 'nr':99}).id)
  call assert_equal(2, g:Xgetlist({'id':start_id + 1, 'nr':0}).nr)
  call assert_equal(0, g:Xgetlist({'id':99, 'nr':0}).id)
  call assert_equal(0, g:Xgetlist({'id':"abc", 'nr':0}).id)

  call g:Xsetlist([], 'a', {'id':start_id, 'context':[1,2]})
  call assert_equal([1,2], g:Xgetlist({'nr':1, 'context':1}).context)
  call g:Xsetlist([], 'a', {'id':start_id+1, 'lines':['F1:10:L10']})
  call assert_equal('L10', g:Xgetlist({'nr':2, 'items':1}).items[0].text)
  call assert_equal(-1, g:Xsetlist([], 'a', {'id':999, 'title':'Vim'}))
  call assert_equal(-1, g:Xsetlist([], 'a', {'id':'abc', 'title':'Vim'}))

  let qfid = g:Xgetlist({'id':0, 'nr':0})
  call g:Xsetlist([], 'f')
  call assert_equal(0, g:Xgetlist({'id':qfid, 'nr':0}).id)
endfunc

func Test_qf_id()
  call Xqfid_tests('c')
  call Xqfid_tests('l')
endfunc

func Xqfjump_tests(cchar)
  call s:setup_commands(a:cchar)

  call writefile(["Line1\tFoo", "Line2"], 'F1')
  call writefile(["Line1\tBar", "Line2"], 'F2')
  call writefile(["Line1\tBaz", "Line2"], 'F3')

  call g:Xsetlist([], 'f')

  " Tests for
  "   Jumping to a line using a pattern
  "   Jumping to a column greater than the last column in a line
  "   Jumping to a line greater than the last line in the file
  let l = []
  for i in range(1, 7)
    call add(l, {})
  endfor
  let l[0].filename='F1'
  let l[0].pattern='Line1'
  let l[1].filename='F2'
  let l[1].pattern='Line1'
  let l[2].filename='F3'
  let l[2].pattern='Line1'
  let l[3].filename='F3'
  let l[3].lnum=1
  let l[3].col=9
  let l[3].vcol=1
  let l[4].filename='F3'
  let l[4].lnum=99
  let l[5].filename='F3'
  let l[5].lnum=1
  let l[5].col=99
  let l[5].vcol=1
  let l[6].filename='F3'
  let l[6].pattern='abcxyz'

  call g:Xsetlist([], ' ', {'items' : l})
  Xopen | only
  2Xnext
  call assert_equal(3, g:Xgetlist({'idx' : 0}).idx)
  call assert_equal('F3', bufname('%'))
  Xnext
  call assert_equal(7, col('.'))
  Xnext
  call assert_equal(2, line('.'))
  Xnext
  call assert_equal(9, col('.'))
  2
  Xnext
  call assert_equal(2, line('.'))

  if a:cchar == 'l'
    " When jumping to a location list entry in the location list window and
    " no usable windows are available, then a new window should be opened.
    enew! | new | only
    call g:Xsetlist([], 'f')
    setlocal buftype=nofile
    new
    call g:Xsetlist([], ' ', {'lines' : ['F1:1:1:Line1', 'F1:2:2:Line2', 'F2:1:1:Line1', 'F2:2:2:Line2', 'F3:1:1:Line1', 'F3:2:2:Line2']})
    Xopen
    let winid = win_getid()
    wincmd p
    close
    call win_gotoid(winid)
    Xnext
    call assert_equal(3, winnr('$'))
    call assert_equal(1, winnr())
    call assert_equal(2, line('.'))

    " When jumping to an entry in the location list window and the window
    " associated with the location list is not present and a window containing
    " the file is already present, then that window should be used.
    close
    belowright new
    call g:Xsetlist([], 'f')
    edit F3
    call win_gotoid(winid)
    Xlast
    call assert_equal(3, winnr())
    call assert_equal(6, g:Xgetlist({'size' : 1}).size)
    call assert_equal(winid, g:Xgetlist({'winid' : 1}).winid)
  endif

  " Cleanup
  enew!
  new | only

  call delete('F1')
  call delete('F2')
  call delete('F3')
endfunc

func Test_qfjump()
  call Xqfjump_tests('c')
  call Xqfjump_tests('l')
endfunc

" Tests for the getqflist() and getloclist() functions when the list is not
" present or is empty
func Xgetlist_empty_tests(cchar)
  call s:setup_commands(a:cchar)

  " Empty quickfix stack
  call g:Xsetlist([], 'f')
  call assert_equal('', g:Xgetlist({'context' : 0}).context)
  call assert_equal(0, g:Xgetlist({'id' : 0}).id)
  call assert_equal(0, g:Xgetlist({'idx' : 0}).idx)
  call assert_equal([], g:Xgetlist({'items' : 0}).items)
  call assert_equal(0, g:Xgetlist({'nr' : 0}).nr)
  call assert_equal(0, g:Xgetlist({'size' : 0}).size)
  call assert_equal('', g:Xgetlist({'title' : 0}).title)
  call assert_equal(0, g:Xgetlist({'winid' : 0}).winid)
  call assert_equal(0, g:Xgetlist({'changedtick' : 0}).changedtick)
  if a:cchar == 'c'
    call assert_equal({'context' : '', 'id' : 0, 'idx' : 0,
		  \ 'items' : [], 'nr' : 0, 'size' : 0, 'qfbufnr' : 0,
		  \ 'title' : '', 'winid' : 0, 'changedtick': 0},
		  \ g:Xgetlist({'all' : 0}))
  else
    call assert_equal({'context' : '', 'id' : 0, 'idx' : 0,
		\ 'items' : [], 'nr' : 0, 'size' : 0, 'title' : '',
		\ 'winid' : 0, 'changedtick': 0, 'filewinid' : 0,
		\ 'qfbufnr' : 0},
		\ g:Xgetlist({'all' : 0}))
  endif

  " Quickfix window with empty stack
  silent! Xopen
  let qfwinid = (a:cchar == 'c') ? win_getid() : 0
  let qfbufnr = (a:cchar == 'c') ? bufnr('') : 0
  call assert_equal(qfwinid, g:Xgetlist({'winid' : 0}).winid)
  Xclose

  " Empty quickfix list
  Xexpr ""
  call assert_equal('', g:Xgetlist({'context' : 0}).context)
  call assert_notequal(0, g:Xgetlist({'id' : 0}).id)
  call assert_equal(0, g:Xgetlist({'idx' : 0}).idx)
  call assert_equal([], g:Xgetlist({'items' : 0}).items)
  call assert_notequal(0, g:Xgetlist({'nr' : 0}).nr)
  call assert_equal(0, g:Xgetlist({'size' : 0}).size)
  call assert_notequal('', g:Xgetlist({'title' : 0}).title)
  call assert_equal(0, g:Xgetlist({'winid' : 0}).winid)
  call assert_equal(1, g:Xgetlist({'changedtick' : 0}).changedtick)

  let qfid = g:Xgetlist({'id' : 0}).id
  call g:Xsetlist([], 'f')

  " Non-existing quickfix identifier
  call assert_equal('', g:Xgetlist({'id' : qfid, 'context' : 0}).context)
  call assert_equal(0, g:Xgetlist({'id' : qfid}).id)
  call assert_equal(0, g:Xgetlist({'id' : qfid, 'idx' : 0}).idx)
  call assert_equal([], g:Xgetlist({'id' : qfid, 'items' : 0}).items)
  call assert_equal(0, g:Xgetlist({'id' : qfid, 'nr' : 0}).nr)
  call assert_equal(0, g:Xgetlist({'id' : qfid, 'size' : 0}).size)
  call assert_equal('', g:Xgetlist({'id' : qfid, 'title' : 0}).title)
  call assert_equal(0, g:Xgetlist({'id' : qfid, 'winid' : 0}).winid)
  call assert_equal(0, g:Xgetlist({'id' : qfid, 'changedtick' : 0}).changedtick)
  if a:cchar == 'c'
    call assert_equal({'context' : '', 'id' : 0, 'idx' : 0, 'items' : [],
		\ 'nr' : 0, 'size' : 0, 'title' : '', 'winid' : 0,
		\ 'qfbufnr' : qfbufnr,
		\ 'changedtick' : 0}, g:Xgetlist({'id' : qfid, 'all' : 0}))
  else
    call assert_equal({'context' : '', 'id' : 0, 'idx' : 0, 'items' : [],
		\ 'nr' : 0, 'size' : 0, 'title' : '', 'winid' : 0,
		\ 'changedtick' : 0, 'filewinid' : 0, 'qfbufnr' : 0},
		\ g:Xgetlist({'id' : qfid, 'all' : 0}))
  endif

  " Non-existing quickfix list number
  call assert_equal('', g:Xgetlist({'nr' : 5, 'context' : 0}).context)
  call assert_equal(0, g:Xgetlist({'nr' : 5}).nr)
  call assert_equal(0, g:Xgetlist({'nr' : 5, 'idx' : 0}).idx)
  call assert_equal([], g:Xgetlist({'nr' : 5, 'items' : 0}).items)
  call assert_equal(0, g:Xgetlist({'nr' : 5, 'id' : 0}).id)
  call assert_equal(0, g:Xgetlist({'nr' : 5, 'size' : 0}).size)
  call assert_equal('', g:Xgetlist({'nr' : 5, 'title' : 0}).title)
  call assert_equal(0, g:Xgetlist({'nr' : 5, 'winid' : 0}).winid)
  call assert_equal(0, g:Xgetlist({'nr' : 5, 'changedtick' : 0}).changedtick)
  if a:cchar == 'c'
    call assert_equal({'context' : '', 'id' : 0, 'idx' : 0, 'items' : [],
		\ 'nr' : 0, 'size' : 0, 'title' : '', 'winid' : 0,
		\ 'changedtick' : 0, 'qfbufnr' : qfbufnr},
		\ g:Xgetlist({'nr' : 5, 'all' : 0}))
  else
    call assert_equal({'context' : '', 'id' : 0, 'idx' : 0, 'items' : [],
		\ 'nr' : 0, 'size' : 0, 'title' : '', 'winid' : 0,
		\ 'changedtick' : 0, 'filewinid' : 0, 'qfbufnr' : 0},
		\ g:Xgetlist({'nr' : 5, 'all' : 0}))
  endif
endfunc

func Test_getqflist()
  call Xgetlist_empty_tests('c')
  call Xgetlist_empty_tests('l')
endfunc

func Test_getqflist_invalid_nr()
  " The following commands used to crash Vim
  cexpr ""
  call getqflist({'nr' : $XXX_DOES_NOT_EXIST_XXX})

  " Cleanup
  call setqflist([], 'r')
endfunc

" Tests for the quickfix/location list changedtick
func Xqftick_tests(cchar)
  call s:setup_commands(a:cchar)

  call g:Xsetlist([], 'f')

  Xexpr "F1:10:Line10"
  let qfid = g:Xgetlist({'id' : 0}).id
  call assert_equal(1, g:Xgetlist({'changedtick' : 0}).changedtick)
  Xaddexpr "F2:20:Line20\nF2:21:Line21"
  call assert_equal(2, g:Xgetlist({'changedtick' : 0}).changedtick)
  call g:Xsetlist([], 'a', {'lines' : ["F3:30:Line30", "F3:31:Line31"]})
  call assert_equal(3, g:Xgetlist({'changedtick' : 0}).changedtick)
  call g:Xsetlist([], 'r', {'lines' : ["F4:40:Line40"]})
  call assert_equal(4, g:Xgetlist({'changedtick' : 0}).changedtick)
  call g:Xsetlist([], 'a', {'title' : 'New Title'})
  call assert_equal(5, g:Xgetlist({'changedtick' : 0}).changedtick)

  enew!
  call append(0, ["F5:50:L50", "F6:60:L60"])
  Xaddbuffer
  call assert_equal(6, g:Xgetlist({'changedtick' : 0}).changedtick)
  enew!

  call g:Xsetlist([], 'a', {'context' : {'bus' : 'pci'}})
  call assert_equal(7, g:Xgetlist({'changedtick' : 0}).changedtick)
  call g:Xsetlist([{'filename' : 'F7', 'lnum' : 10, 'text' : 'L7'},
	      \ {'filename' : 'F7', 'lnum' : 11, 'text' : 'L11'}], 'a')
  call assert_equal(8, g:Xgetlist({'changedtick' : 0}).changedtick)
  call g:Xsetlist([{'filename' : 'F7', 'lnum' : 10, 'text' : 'L7'},
	      \ {'filename' : 'F7', 'lnum' : 11, 'text' : 'L11'}], ' ')
  call assert_equal(1, g:Xgetlist({'changedtick' : 0}).changedtick)
  call g:Xsetlist([{'filename' : 'F7', 'lnum' : 10, 'text' : 'L7'},
	      \ {'filename' : 'F7', 'lnum' : 11, 'text' : 'L11'}], 'r')
  call assert_equal(2, g:Xgetlist({'changedtick' : 0}).changedtick)

  call writefile(["F8:80:L80", "F8:81:L81"], "Xone")
  Xfile Xone
  call assert_equal(1, g:Xgetlist({'changedtick' : 0}).changedtick)
  Xaddfile Xone
  call assert_equal(2, g:Xgetlist({'changedtick' : 0}).changedtick)

  " Test case for updating a non-current quickfix list
  call g:Xsetlist([], 'f')
  Xexpr "F1:1:L1"
  Xexpr "F2:2:L2"
  call g:Xsetlist([], 'a', {'nr' : 1, "lines" : ["F10:10:L10"]})
  call assert_equal(1, g:Xgetlist({'changedtick' : 0}).changedtick)
  call assert_equal(2, g:Xgetlist({'nr' : 1, 'changedtick' : 0}).changedtick)

  call delete("Xone")
endfunc

func Test_qf_tick()
  call Xqftick_tests('c')
  call Xqftick_tests('l')
endfunc

" Test helpgrep with lang specifier
func Xtest_helpgrep_with_lang_specifier(cchar)
  call s:setup_commands(a:cchar)
  Xhelpgrep Vim@en
  call assert_equal('help', &filetype)
  call assert_notequal(0, g:Xgetlist({'nr' : '$'}).nr)
  new | only
endfunc

func Test_helpgrep_with_lang_specifier()
  call Xtest_helpgrep_with_lang_specifier('c')
  call Xtest_helpgrep_with_lang_specifier('l')
endfunc

" The following test used to crash Vim.
" Open the location list window and close the regular window associated with
" the location list. When the garbage collection runs now, it incorrectly
" marks the location list context as not in use and frees the context.
func Test_ll_window_ctx()
  call setloclist(0, [], 'f')
  call setloclist(0, [], 'a', {'context' : []})
  lopen | only
  call test_garbagecollect_now()
  echo getloclist(0, {'context' : 1}).context
  enew | only
endfunc

" The following test used to crash vim
func Test_lfile_crash()
  sp Xtest
  au QuickFixCmdPre * bw
  call assert_fails('lfile', 'E40')
  au! QuickFixCmdPre
endfunc

" The following test used to crash vim
func Test_lbuffer_crash()
  sv Xtest
  augroup QF_Test
    au!
    au * * bw
  augroup END
  lbuffer
  augroup QF_Test
    au!
  augroup END
endfunc

" The following test used to crash vim
func Test_lexpr_crash()
  augroup QF_Test
    au!
    au * * call setloclist(0, [], 'f')
  augroup END
  lexpr ""
  augroup QF_Test
    au!
  augroup END

  enew | only
  augroup QF_Test
    au!
    au BufNew * call setloclist(0, [], 'f')
  augroup END
  lexpr 'x:1:x'
  augroup QF_Test
    au!
  augroup END

  enew | only
  lexpr ''
  lopen
  augroup QF_Test
    au!
    au FileType * call setloclist(0, [], 'f')
  augroup END
  lexpr ''
  augroup QF_Test
    au!
  augroup END
endfunc

" The following test used to crash Vim
func Test_lvimgrep_crash()
  sv Xtest
  augroup QF_Test
    au!
    au * * call setloclist(0, [], 'f')
  augroup END
  lvimgrep quickfix test_quickfix.vim
  augroup QF_Test
    au!
  augroup END

  new | only
  augroup QF_Test
    au!
    au BufEnter * call setloclist(0, [], 'r')
  augroup END
  call assert_fails('lvimgrep Test_lvimgrep_crash *', 'E926:')
  augroup QF_Test
    au!
  augroup END

  enew | only
endfunc

" Test for the position of the quickfix and location list window
func Test_qfwin_pos()
  " Open two windows
  new | only
  new
  cexpr ['F1:10:L10']
  copen
  " Quickfix window should be the bottom most window
  call assert_equal(3, winnr())
  close
  " Open at the very top
  wincmd t
  topleft copen
  call assert_equal(1, winnr())
  close
  " open left of the current window
  wincmd t
  below new
  leftabove copen
  call assert_equal(2, winnr())
  close
  " open right of the current window
  rightbelow copen
  call assert_equal(3, winnr())
  close
endfunc

" Tests for quickfix/location lists changed by autocommands when
" :vimgrep/:lvimgrep commands are running.
func Test_vimgrep_autocmd()
  call setqflist([], 'f')
  call writefile(['stars'], 'Xtest1.txt')
  call writefile(['stars'], 'Xtest2.txt')

  " Test 1:
  " When searching for a pattern using :vimgrep, if the quickfix list is
  " changed by an autocmd, the results should be added to the correct quickfix
  " list.
  autocmd BufRead Xtest2.txt cexpr '' | cexpr ''
  silent vimgrep stars Xtest*.txt
  call assert_equal(1, getqflist({'nr' : 0}).nr)
  call assert_equal(3, getqflist({'nr' : '$'}).nr)
  call assert_equal('Xtest2.txt', bufname(getqflist()[1].bufnr))
  au! BufRead Xtest2.txt

  " Test 2:
  " When searching for a pattern using :vimgrep, if the quickfix list is
  " freed, then a error should be given.
  silent! %bwipe!
  call setqflist([], 'f')
  autocmd BufRead Xtest2.txt for i in range(10) | cexpr '' | endfor
  call assert_fails('vimgrep stars Xtest*.txt', 'E925:')
  au! BufRead Xtest2.txt

  " Test 3:
  " When searching for a pattern using :lvimgrep, if the location list is
  " freed, then the command should error out.
  silent! %bwipe!
  let g:save_winid = win_getid()
  autocmd BufRead Xtest2.txt call setloclist(g:save_winid, [], 'f')
  call assert_fails('lvimgrep stars Xtest*.txt', 'E926:')
  au! BufRead Xtest2.txt

  call delete('Xtest1.txt')
  call delete('Xtest2.txt')
  call setqflist([], 'f')
endfunc

" The following test used to crash Vim
func Test_lhelpgrep_autocmd()
  lhelpgrep quickfix
  autocmd QuickFixCmdPost * call setloclist(0, [], 'f')
  lhelpgrep buffer
  call assert_equal('help', &filetype)
  call assert_equal(0, getloclist(0, {'nr' : '$'}).nr)
  lhelpgrep tabpage
  call assert_equal('help', &filetype)
  call assert_equal(1, getloclist(0, {'nr' : '$'}).nr)
  au! QuickFixCmdPost

  new | only
  augroup QF_Test
    au!
    au BufEnter * call setqflist([], 'f')
  augroup END
  call assert_fails('helpgrep quickfix', 'E925:')
  augroup QF_Test
    au! BufEnter
  augroup END

  new | only
  augroup QF_Test
    au!
    au BufEnter * call setqflist([], 'r')
  augroup END
  call assert_fails('helpgrep quickfix', 'E925:')
  augroup QF_Test
    au! BufEnter
  augroup END

  new | only
  augroup QF_Test
    au!
    au BufEnter * call setloclist(0, [], 'r')
  augroup END
  call assert_fails('lhelpgrep quickfix', 'E926:')
  augroup QF_Test
    au! BufEnter
  augroup END

  new | only
endfunc

" Test for shortening/simplifying the file name when opening the
" quickfix window or when displaying the quickfix list
func Test_shorten_fname()
  if !has('unix')
    return
  endif
  %bwipe
  " Create a quickfix list with a absolute path filename
  let fname = getcwd() . '/test_quickfix.vim'
  call setqflist([], ' ', {'lines':[fname . ":20:Line20"], 'efm':'%f:%l:%m'})
  call assert_equal(fname, bufname('test_quickfix.vim'))
  " Opening the quickfix window should simplify the file path
  cwindow
  call assert_equal('test_quickfix.vim', bufname('test_quickfix.vim'))
  cclose
  %bwipe
  " Create a quickfix list with a absolute path filename
  call setqflist([], ' ', {'lines':[fname . ":20:Line20"], 'efm':'%f:%l:%m'})
  call assert_equal(fname, bufname('test_quickfix.vim'))
  " Displaying the quickfix list should simplify the file path
  silent! clist
  call assert_equal('test_quickfix.vim', bufname('test_quickfix.vim'))
endfunc

" Quickfix title tests
" In the below tests, 'exe "cmd"' is used to invoke the quickfix commands.
" Otherwise due to indentation, the title is set with spaces at the beginning
" of the command.
func Test_qftitle()
  call writefile(["F1:1:Line1"], 'Xerr')

  " :cexpr
  exe "cexpr readfile('Xerr')"
  call assert_equal(":cexpr readfile('Xerr')", getqflist({'title' : 1}).title)

  " :cgetexpr
  exe "cgetexpr readfile('Xerr')"
  call assert_equal(":cgetexpr readfile('Xerr')",
					\ getqflist({'title' : 1}).title)

  " :caddexpr
  call setqflist([], 'f')
  exe "caddexpr readfile('Xerr')"
  call assert_equal(":caddexpr readfile('Xerr')",
					\ getqflist({'title' : 1}).title)

  " :cbuffer
  new Xerr
  exe "cbuffer"
  call assert_equal(':cbuffer (Xerr)', getqflist({'title' : 1}).title)

  " :cgetbuffer
  edit Xerr
  exe "cgetbuffer"
  call assert_equal(':cgetbuffer (Xerr)', getqflist({'title' : 1}).title)

  " :caddbuffer
  call setqflist([], 'f')
  edit Xerr
  exe "caddbuffer"
  call assert_equal(':caddbuffer (Xerr)', getqflist({'title' : 1}).title)

  " :cfile
  exe "cfile Xerr"
  call assert_equal(':cfile Xerr', getqflist({'title' : 1}).title)

  " :cgetfile
  exe "cgetfile Xerr"
  call assert_equal(':cgetfile Xerr', getqflist({'title' : 1}).title)

  " :caddfile
  call setqflist([], 'f')
  exe "caddfile Xerr"
  call assert_equal(':caddfile Xerr', getqflist({'title' : 1}).title)

  " :grep
  set grepprg=internal
  exe "grep F1 Xerr"
  call assert_equal(':grep F1 Xerr', getqflist({'title' : 1}).title)

  " :grepadd
  call setqflist([], 'f')
  exe "grepadd F1 Xerr"
  call assert_equal(':grepadd F1 Xerr', getqflist({'title' : 1}).title)
  set grepprg&vim

  " :vimgrep
  exe "vimgrep F1 Xerr"
  call assert_equal(':vimgrep F1 Xerr', getqflist({'title' : 1}).title)

  " :vimgrepadd
  call setqflist([], 'f')
  exe "vimgrepadd F1 Xerr"
  call assert_equal(':vimgrepadd F1 Xerr', getqflist({'title' : 1}).title)

  call setqflist(['F1:10:L10'], ' ')
  call assert_equal(':setqflist()', getqflist({'title' : 1}).title)

  call setqflist([], 'f')
  call setqflist(['F1:10:L10'], 'a')
  call assert_equal(':setqflist()', getqflist({'title' : 1}).title)

  call setqflist([], 'f')
  call setqflist(['F1:10:L10'], 'r')
  call assert_equal(':setqflist()', getqflist({'title' : 1}).title)

  close
  call delete('Xerr')

  call setqflist([], ' ', {'title' : 'Errors'})
  copen
  call assert_equal('Errors', w:quickfix_title)
  call setqflist([], 'r', {'items' : [{'filename' : 'a.c', 'lnum' : 10}]})
  call assert_equal('Errors', w:quickfix_title)
  cclose
endfunc

func Test_lbuffer_with_bwipe()
  new
  new
  augroup nasty
    au * * bwipe
  augroup END
  lbuffer
  augroup nasty
    au!
  augroup END
endfunc

" Test for an autocmd freeing the quickfix/location list when cexpr/lexpr is
" running
func Xexpr_acmd_freelist(cchar)
  call s:setup_commands(a:cchar)

  " This was using freed memory.
  augroup nasty
    au * * call g:Xsetlist([], 'f')
  augroup END
  Xexpr "x"
  augroup nasty
    au!
  augroup END
endfunc

func Test_cexpr_acmd_freelist()
  call Xexpr_acmd_freelist('c')
  call Xexpr_acmd_freelist('l')
endfunc

" Test for commands that create a new quickfix/location list and jump to the
" first error automatically.
func Xjumpto_first_error_test(cchar)
  call s:setup_commands(a:cchar)

  call s:create_test_file('Xtestfile1')
  call s:create_test_file('Xtestfile2')
  let l = ['Xtestfile1:2:Line2', 'Xtestfile2:4:Line4']

  " Test for cexpr/lexpr
  enew
  Xexpr l
  call assert_equal('Xtestfile1', bufname(''))
  call assert_equal(2, line('.'))

  " Test for cfile/lfile
  enew
  call writefile(l, 'Xerr')
  Xfile Xerr
  call assert_equal('Xtestfile1', bufname(''))
  call assert_equal(2, line('.'))

  " Test for cbuffer/lbuffer
  edit Xerr
  Xbuffer
  call assert_equal('Xtestfile1', bufname(''))
  call assert_equal(2, line('.'))

  call delete('Xerr')
  call delete('Xtestfile1')
  call delete('Xtestfile2')
endfunc

func Test_jumpto_first_error()
  call Xjumpto_first_error_test('c')
  call Xjumpto_first_error_test('l')
endfunc

" Test for a quickfix autocmd changing the quickfix/location list before
" jumping to the first error in the new list.
func Xautocmd_changelist(cchar)
  call s:setup_commands(a:cchar)

  " Test for cfile/lfile
  call s:create_test_file('Xtestfile1')
  call s:create_test_file('Xtestfile2')
  Xexpr 'Xtestfile1:2:Line2'
  autocmd QuickFixCmdPost * Xolder
  call writefile(['Xtestfile2:4:Line4'], 'Xerr')
  Xfile Xerr
  call assert_equal('Xtestfile2', bufname(''))
  call assert_equal(4, line('.'))
  autocmd! QuickFixCmdPost

  " Test for cbuffer/lbuffer
  call g:Xsetlist([], 'f')
  Xexpr 'Xtestfile1:2:Line2'
  autocmd QuickFixCmdPost * Xolder
  call writefile(['Xtestfile2:4:Line4'], 'Xerr')
  edit Xerr
  Xbuffer
  call assert_equal('Xtestfile2', bufname(''))
  call assert_equal(4, line('.'))
  autocmd! QuickFixCmdPost

  " Test for cexpr/lexpr
  call g:Xsetlist([], 'f')
  Xexpr 'Xtestfile1:2:Line2'
  autocmd QuickFixCmdPost * Xolder
  Xexpr 'Xtestfile2:4:Line4'
  call assert_equal('Xtestfile2', bufname(''))
  call assert_equal(4, line('.'))
  autocmd! QuickFixCmdPost

  " The grepprg may not be set on non-Unix systems
  if has('unix')
    " Test for grep/lgrep
    call g:Xsetlist([], 'f')
    Xexpr 'Xtestfile1:2:Line2'
    autocmd QuickFixCmdPost * Xolder
    silent Xgrep Line5 Xtestfile2
    call assert_equal('Xtestfile2', bufname(''))
    call assert_equal(5, line('.'))
    autocmd! QuickFixCmdPost
  endif

  " Test for vimgrep/lvimgrep
  call g:Xsetlist([], 'f')
  Xexpr 'Xtestfile1:2:Line2'
  autocmd QuickFixCmdPost * Xolder
  silent Xvimgrep Line5 Xtestfile2
  call assert_equal('Xtestfile2', bufname(''))
  call assert_equal(5, line('.'))
  autocmd! QuickFixCmdPost

  " Test for autocommands clearing the quickfix list before jumping to the
  " first error. This should not result in an error
  autocmd QuickFixCmdPost * call g:Xsetlist([], 'r')
  let v:errmsg = ''
  " Test for cfile/lfile
  Xfile Xerr
  call assert_true(v:errmsg !~# 'E42:')
  " Test for cbuffer/lbuffer
  edit Xerr
  Xbuffer
  call assert_true(v:errmsg !~# 'E42:')
  " Test for cexpr/lexpr
  Xexpr 'Xtestfile2:4:Line4'
  call assert_true(v:errmsg !~# 'E42:')
  " Test for grep/lgrep
  " The grepprg may not be set on non-Unix systems
  if has('unix')
    silent Xgrep Line5 Xtestfile2
    call assert_true(v:errmsg !~# 'E42:')
  endif
  " Test for vimgrep/lvimgrep
  call assert_fails('silent Xvimgrep Line5 Xtestfile2', 'E480:')
  autocmd! QuickFixCmdPost

  call delete('Xerr')
  call delete('Xtestfile1')
  call delete('Xtestfile2')
endfunc

func Test_autocmd_changelist()
  call Xautocmd_changelist('c')
  call Xautocmd_changelist('l')
endfunc

" Tests for the ':filter /pat/ clist' command
func Test_filter_clist()
  cexpr ['Xfile1:10:10:Line 10', 'Xfile2:15:15:Line 15']
  call assert_equal([' 2 Xfile2:15 col 15: Line 15'],
			\ split(execute('filter /Line 15/ clist'), "\n"))
  call assert_equal([' 1 Xfile1:10 col 10: Line 10'],
			\ split(execute('filter /Xfile1/ clist'), "\n"))
  call assert_equal([], split(execute('filter /abc/ clist'), "\n"))

  call setqflist([{'module' : 'abc', 'pattern' : 'pat1'},
			\ {'module' : 'pqr', 'pattern' : 'pat2'}], ' ')
  call assert_equal([' 2 pqr:pat2:  '],
			\ split(execute('filter /pqr/ clist'), "\n"))
  call assert_equal([' 1 abc:pat1:  '],
			\ split(execute('filter /pat1/ clist'), "\n"))
endfunc

" Tests for the "CTRL-W <CR>" command.
func Xview_result_split_tests(cchar)
  call s:setup_commands(a:cchar)

  " Test that "CTRL-W <CR>" in a qf/ll window fails with empty list.
  call g:Xsetlist([])
  Xopen
  let l:win_count = winnr('$')
  call assert_fails('execute "normal! \<C-W>\<CR>"', 'E42')
  call assert_equal(l:win_count, winnr('$'))
  Xclose
endfunc

func Test_view_result_split()
  call Xview_result_split_tests('c')
  call Xview_result_split_tests('l')
endfunc

" Test that :cc sets curswant
func Test_curswant()
  helpgrep quickfix
  normal! llll
  1cc
  call assert_equal(getcurpos()[4], virtcol('.'))
  cclose | helpclose
endfunc

" Test for opening a file from the quickfix window using CTRL-W <Enter>
" doesn't leave an empty buffer around.
func Test_splitview()
  call s:create_test_file('Xtestfile1')
  call s:create_test_file('Xtestfile2')
  new | only
  let last_bufnr = bufnr('Test_sv_1', 1)
  let l = ['Xtestfile1:2:Line2', 'Xtestfile2:4:Line4']
  cgetexpr l
  copen
  let numbufs = len(getbufinfo())
  exe "normal \<C-W>\<CR>"
  copen
  exe "normal j\<C-W>\<CR>"
  " Make sure new empty buffers are not created
  call assert_equal(numbufs, len(getbufinfo()))
  " Creating a new buffer should use the next available buffer number
  call assert_equal(last_bufnr + 4, bufnr("Test_sv_2", 1))
  bwipe Test_sv_1
  bwipe Test_sv_2
  new | only

  " When split opening files from location list window, make sure that two
  " windows doesn't refer to the same location list
  lgetexpr l
  let locid = getloclist(0, {'id' : 0}).id
  lopen
  exe "normal \<C-W>\<CR>"
  call assert_notequal(locid, getloclist(0, {'id' : 0}).id)
  call assert_equal(0, getloclist(0, {'winid' : 0}).winid)
  new | only

  " When split opening files from a helpgrep location list window, a new help
  " window should be opened with a copy of the location list.
  lhelpgrep window
  let locid = getloclist(0, {'id' : 0}).id
  lwindow
  exe "normal j\<C-W>\<CR>"
  call assert_notequal(locid, getloclist(0, {'id' : 0}).id)
  call assert_equal(0, getloclist(0, {'winid' : 0}).winid)
  new | only

  call delete('Xtestfile1')
  call delete('Xtestfile2')
endfunc

" Test for parsing entries using visual screen column
func Test_viscol()
  enew
  call writefile(["Col1\tCol2\tCol3"], 'Xfile1')
  edit Xfile1

  " Use byte offset for column number
  set efm&
  cexpr "Xfile1:1:5:XX\nXfile1:1:9:YY\nXfile1:1:20:ZZ"
  call assert_equal([5, 8], [col('.'), virtcol('.')])
  cnext
  call assert_equal([9, 12], [col('.'), virtcol('.')])
  cnext
  call assert_equal([14, 20], [col('.'), virtcol('.')])

  " Use screen column offset for column number
  set efm=%f:%l:%v:%m
  cexpr "Xfile1:1:8:XX\nXfile1:1:12:YY\nXfile1:1:20:ZZ"
  call assert_equal([5, 8], [col('.'), virtcol('.')])
  cnext
  call assert_equal([9, 12], [col('.'), virtcol('.')])
  cnext
  call assert_equal([14, 20], [col('.'), virtcol('.')])
  cexpr "Xfile1:1:6:XX\nXfile1:1:15:YY\nXfile1:1:24:ZZ"
  call assert_equal([5, 8], [col('.'), virtcol('.')])
  cnext
  call assert_equal([10, 16], [col('.'), virtcol('.')])
  cnext
  call assert_equal([14, 20], [col('.'), virtcol('.')])

  enew
  call writefile(["Col1\täü\töß\tCol4"], 'Xfile1')

  " Use byte offset for column number
  set efm&
  cexpr "Xfile1:1:8:XX\nXfile1:1:11:YY\nXfile1:1:16:ZZ"
  call assert_equal([8, 10], [col('.'), virtcol('.')])
  cnext
  call assert_equal([11, 17], [col('.'), virtcol('.')])
  cnext
  call assert_equal([16, 25], [col('.'), virtcol('.')])

  " Use screen column offset for column number
  set efm=%f:%l:%v:%m
  cexpr "Xfile1:1:10:XX\nXfile1:1:17:YY\nXfile1:1:25:ZZ"
  call assert_equal([8, 10], [col('.'), virtcol('.')])
  cnext
  call assert_equal([11, 17], [col('.'), virtcol('.')])
  cnext
  call assert_equal([16, 25], [col('.'), virtcol('.')])

  enew | only
  set efm&
  call delete('Xfile1')
endfunc

" Test for the quickfix window buffer
func Xqfbuf_test(cchar)
  call s:setup_commands(a:cchar)

  " Quickfix buffer should be reused across closing and opening a quickfix
  " window
  Xexpr "F1:10:Line10"
  Xopen
  let qfbnum = bufnr('')
  Xclose
  " Even after the quickfix window is closed, the buffer should be loaded
  call assert_true(bufloaded(qfbnum))
  call assert_true(qfbnum, g:Xgetlist({'qfbufnr' : 0}).qfbufnr)
  Xopen
  " Buffer should be reused when opening the window again
  call assert_equal(qfbnum, bufnr(''))
  Xclose

  if a:cchar == 'l'
    %bwipe
    " For a location list, when both the file window and the location list
    " window for the list are closed, then the buffer should be freed.
    new | only
    lexpr "F1:10:Line10"
    let wid = win_getid()
    lopen
    let qfbnum = bufnr('')
    call assert_match(qfbnum . ' %a-  "\[Location List]"', execute('ls'))
    close
    " When the location list window is closed, the buffer name should not
    " change to 'Quickfix List'
    call assert_match(qfbnum . 'u h-  "\[Location List]"', execute('ls!'))
    call assert_true(bufloaded(qfbnum))

    " After deleting a location list buffer using ":bdelete", opening the
    " location list window should mark the buffer as a location list buffer.
    exe "bdelete " . qfbnum
    lopen
    call assert_equal("quickfix", &buftype)
    call assert_equal(1, getwininfo(win_getid(winnr()))[0].loclist)
    call assert_equal(wid, getloclist(0, {'filewinid' : 0}).filewinid)
    call assert_false(&swapfile)
    lclose

    " When the location list is cleared for the window, the buffer should be
    " removed
    call setloclist(0, [], 'f')
    call assert_false(bufexists(qfbnum))
    call assert_equal(0, getloclist(0, {'qfbufnr' : 0}).qfbufnr)

    " When the location list is freed with the location list window open, the
    " location list buffer should not be lost. It should be reused when the
    " location list is again populated.
    lexpr "F1:10:Line10"
    lopen
    let wid = win_getid()
    let qfbnum = bufnr('')
    wincmd p
    call setloclist(0, [], 'f')
    lexpr "F1:10:Line10"
    lopen
    call assert_equal(wid, win_getid())
    call assert_equal(qfbnum, bufnr(''))
    lclose

    " When the window with the location list is closed, the buffer should be
    " removed
    new | only
    call assert_false(bufexists(qfbnum))
  endif
endfunc

func Test_qfbuf()
  call Xqfbuf_test('c')
  call Xqfbuf_test('l')
endfunc

" If there is an autocmd to use only one window, then opening the location
" list window used to crash Vim.
func Test_winonly_autocmd()
  call s:create_test_file('Xtest1')
  " Autocmd to show only one Vim window at a time
  autocmd WinEnter * only
  new
  " Load the location list
  lexpr "Xtest1:5:Line5\nXtest1:10:Line10\nXtest1:15:Line15"
  let loclistid = getloclist(0, {'id' : 0}).id
  " Open the location list window. Only this window will be shown and the file
  " window is closed.
  lopen
  call assert_equal(loclistid, getloclist(0, {'id' : 0}).id)
  " Jump to an entry in the location list and make sure that the cursor is
  " positioned correctly.
  ll 3
  call assert_equal(loclistid, getloclist(0, {'id' : 0}).id)
  call assert_equal('Xtest1', bufname(''))
  call assert_equal(15, line('.'))
  " Cleanup
  autocmd! WinEnter
  new | only
  call delete('Xtest1')
endfunc

" Test to make sure that an empty quickfix buffer is not reused for loading
" a normal buffer.
func Test_empty_qfbuf()
  enew | only
  call writefile(["Test"], 'Xfile1')
  call setqflist([], 'f')
  copen | only
  let qfbuf = bufnr('')
  edit Xfile1
  call assert_notequal(qfbuf, bufnr(''))
  enew
  call delete('Xfile1')
endfunc

" Test for the :cbelow, :cabove, :lbelow and :labove commands.
" And for the :cafter, :cbefore, :lafter and :lbefore commands.
func Xtest_below(cchar)
  call s:setup_commands(a:cchar)

  " No quickfix/location list
  call assert_fails('Xbelow', 'E42:')
  call assert_fails('Xabove', 'E42:')
  call assert_fails('Xbefore', 'E42:')
  call assert_fails('Xafter', 'E42:')

  " Empty quickfix/location list
  call g:Xsetlist([])
  call assert_fails('Xbelow', 'E42:')
  call assert_fails('Xabove', 'E42:')
  call assert_fails('Xbefore', 'E42:')
  call assert_fails('Xafter', 'E42:')

  call s:create_test_file('X1')
  call s:create_test_file('X2')
  call s:create_test_file('X3')
  call s:create_test_file('X4')

  " Invalid entries
  edit X1
  call g:Xsetlist(["E1", "E2"])
  call assert_fails('Xbelow', 'E42:')
  call assert_fails('Xabove', 'E42:')
  call assert_fails('3Xbelow', 'E42:')
  call assert_fails('4Xabove', 'E42:')
  call assert_fails('Xbefore', 'E42:')
  call assert_fails('Xafter', 'E42:')
  call assert_fails('3Xbefore', 'E42:')
  call assert_fails('4Xafter', 'E42:')

  " Test the commands with various arguments
  Xexpr ["X1:5:3:L5", "X2:5:2:L5", "X2:10:3:L10", "X2:15:4:L15", "X3:3:5:L3"]
  edit +7 X2
  Xabove
  call assert_equal(['X2', 5], [bufname(''), line('.')])
  call assert_fails('Xabove', 'E553:')
  normal 7G
  Xbefore
  call assert_equal(['X2', 5, 2], [bufname(''), line('.'), col('.')])
  call assert_fails('Xbefore', 'E553:')

  normal 2j
  Xbelow
  call assert_equal(['X2', 10], [bufname(''), line('.')])
  normal 7G
  Xafter
  call assert_equal(['X2', 10, 3], [bufname(''), line('.'), col('.')])

  " Last error in this file
  Xbelow 99
  call assert_equal(['X2', 15], [bufname(''), line('.')])
  call assert_fails('Xbelow', 'E553:')
  normal gg
  Xafter 99
  call assert_equal(['X2', 15, 4], [bufname(''), line('.'), col('.')])
  call assert_fails('Xafter', 'E553:')

  " First error in this file
  Xabove 99
  call assert_equal(['X2', 5], [bufname(''), line('.')])
  call assert_fails('Xabove', 'E553:')
  normal G
  Xbefore 99
  call assert_equal(['X2', 5, 2], [bufname(''), line('.'), col('.')])
  call assert_fails('Xbefore', 'E553:')

  normal gg
  Xbelow 2
  call assert_equal(['X2', 10], [bufname(''), line('.')])
  normal gg
  Xafter 2
  call assert_equal(['X2', 10, 3], [bufname(''), line('.'), col('.')])

  normal G
  Xabove 2
  call assert_equal(['X2', 10], [bufname(''), line('.')])
  normal G
  Xbefore 2
  call assert_equal(['X2', 10, 3], [bufname(''), line('.'), col('.')])

  edit X4
  call assert_fails('Xabove', 'E42:')
  call assert_fails('Xbelow', 'E42:')
  call assert_fails('Xbefore', 'E42:')
  call assert_fails('Xafter', 'E42:')
  if a:cchar == 'l'
    " If a buffer has location list entries from some other window but not
    " from the current window, then the commands should fail.
    edit X1 | split | call setloclist(0, [], 'f')
    call assert_fails('Xabove', 'E776:')
    call assert_fails('Xbelow', 'E776:')
    call assert_fails('Xbefore', 'E776:')
    call assert_fails('Xafter', 'E776:')
    close
  endif

  " Test for lines with multiple quickfix entries
  Xexpr ["X1:5:L5", "X2:5:1:L5_1", "X2:5:2:L5_2", "X2:5:3:L5_3",
	      \ "X2:10:1:L10_1", "X2:10:2:L10_2", "X2:10:3:L10_3",
	      \ "X2:15:1:L15_1", "X2:15:2:L15_2", "X2:15:3:L15_3", "X3:3:L3"]
  edit +1 X2
  Xbelow 2
  call assert_equal(['X2', 10, 1], [bufname(''), line('.'), col('.')])
  normal 1G
  Xafter 2
  call assert_equal(['X2', 5, 2], [bufname(''), line('.'), col('.')])

  normal gg
  Xbelow 99
  call assert_equal(['X2', 15, 1], [bufname(''), line('.'), col('.')])
  normal gg
  Xafter 99
  call assert_equal(['X2', 15, 3], [bufname(''), line('.'), col('.')])

  normal G
  Xabove 2
  call assert_equal(['X2', 10, 1], [bufname(''), line('.'), col('.')])
  normal G
  Xbefore 2
  call assert_equal(['X2', 15, 2], [bufname(''), line('.'), col('.')])

  normal G
  Xabove 99
  call assert_equal(['X2', 5, 1], [bufname(''), line('.'), col('.')])
  normal G
  Xbefore 99
  call assert_equal(['X2', 5, 1], [bufname(''), line('.'), col('.')])

  normal 10G
  Xabove
  call assert_equal(['X2', 5, 1], [bufname(''), line('.'), col('.')])
  normal 10G$
  2Xbefore
  call assert_equal(['X2', 10, 2], [bufname(''), line('.'), col('.')])

  normal 10G
  Xbelow
  call assert_equal(['X2', 15, 1], [bufname(''), line('.'), col('.')])
  normal 9G
  5Xafter
  call assert_equal(['X2', 15, 2], [bufname(''), line('.'), col('.')])

  " Invalid range
  if a:cchar == 'c'
    call assert_fails('-2cbelow', 'E16:')
    call assert_fails('-2cafter', 'E16:')
  else
    call assert_fails('-2lbelow', 'E16:')
    call assert_fails('-2lafter', 'E16:')
  endif

  call delete('X1')
  call delete('X2')
  call delete('X3')
  call delete('X4')
endfunc

func Test_cbelow()
  call Xtest_below('c')
  call Xtest_below('l')
endfunc

func Test_quickfix_count()
  let commands = [
	\ 'cNext',
	\ 'cNfile',
	\ 'cabove',
	\ 'cbelow',
	\ 'cfirst',
	\ 'clast',
	\ 'cnewer',
	\ 'cnext',
	\ 'cnfile',
	\ 'colder',
	\ 'cprevious',
	\ 'crewind',
	\
	\ 'lNext',
	\ 'lNfile',
	\ 'labove',
	\ 'lbelow',
	\ 'lfirst',
	\ 'llast',
	\ 'lnewer',
	\ 'lnext',
	\ 'lnfile',
	\ 'lolder',
	\ 'lprevious',
	\ 'lrewind',
	\ ]
  for cmd in commands
    call assert_fails('-1' .. cmd, 'E16:')
    call assert_fails('.' .. cmd, 'E16:')
    call assert_fails('%' .. cmd, 'E16:')
    call assert_fails('$' .. cmd, 'E16:')
  endfor
endfunc
