" Test for reading and writing .viminfo

source check.vim
source term_util.vim
source shared.vim

function Test_viminfo_read_and_write()
  " First clear 'history', so that "hislen" is zero.  Then set it again,
  " simulating Vim starting up.
  set history=0
  wviminfo Xviminfo
  set history=1000

  call histdel(':')
  let lines = [
	\ '# comment line',
	\ '*encoding=utf-8',
	\ '~MSle0~/asdf',
	\ '|copied as-is',
	\ '|and one more',
	\ ]
  call writefile(lines, 'Xviminfo')
  rviminfo Xviminfo
  call assert_equal('asdf', @/)

  wviminfo Xviminfo
  let lines = readfile('Xviminfo')
  let done = 0
  for line in lines
    if line[0] == '|' && line !~ '^|[234],' && line !~ '^|<'
      if done == 0
	call assert_equal('|1,4', line)
      elseif done == 1
	call assert_equal('|copied as-is', line)
      elseif done == 2
	call assert_equal('|and one more', line)
      endif
      let done += 1
    endif
  endfor
  call assert_equal(3, done)

  call delete('Xviminfo')
endfunc

func Test_global_vars()
  let g:MY_GLOBAL_STRING = "Vim Editor"
  let g:MY_GLOBAL_NUM = 345
  let g:MY_GLOBAL_FLOAT = 3.14
  let test_dict = {'foo': 1, 'bar': 0, 'longvarible': 1000}
  let g:MY_GLOBAL_DICT = test_dict
  " store a really long list, so line wrapping will occur in viminfo file
  let test_list = range(1,100)
  let g:MY_GLOBAL_LIST = test_list
  let test_blob = 0z00112233445566778899aabbccddeeff
  let g:MY_GLOBAL_BLOB = test_blob
  let test_false = v:false
  let g:MY_GLOBAL_FALSE = test_false
  let test_true = v:true
  let g:MY_GLOBAL_TRUE = test_true
  let test_null = v:null
  let g:MY_GLOBAL_NULL = test_null
  let test_none = v:none
  let g:MY_GLOBAL_NONE = test_none

  set viminfo='100,<50,s10,h,!,nviminfo
  wv! Xviminfo

  unlet g:MY_GLOBAL_STRING
  unlet g:MY_GLOBAL_NUM
  unlet g:MY_GLOBAL_FLOAT
  unlet g:MY_GLOBAL_DICT
  unlet g:MY_GLOBAL_LIST
  unlet g:MY_GLOBAL_BLOB
  unlet g:MY_GLOBAL_FALSE
  unlet g:MY_GLOBAL_TRUE
  unlet g:MY_GLOBAL_NULL
  unlet g:MY_GLOBAL_NONE

  rv! Xviminfo
  call assert_equal("Vim Editor", g:MY_GLOBAL_STRING)
  call assert_equal(345, g:MY_GLOBAL_NUM)
  call assert_equal(3.14, g:MY_GLOBAL_FLOAT)
  call assert_equal(test_dict, g:MY_GLOBAL_DICT)
  call assert_equal(test_list, g:MY_GLOBAL_LIST)
  call assert_equal(test_blob, g:MY_GLOBAL_BLOB)
  call assert_equal(test_false, g:MY_GLOBAL_FALSE)
  call assert_equal(test_true, g:MY_GLOBAL_TRUE)
  call assert_equal(test_null, g:MY_GLOBAL_NULL)
  call assert_equal(test_none, g:MY_GLOBAL_NONE)

  " Test for invalid values for a blob, list, dict in a viminfo file
  call writefile([
        \ "!GLOB_BLOB_1\tBLO\t123",
        \ "!GLOB_BLOB_2\tBLO\t012",
        \ "!GLOB_BLOB_3\tBLO\t0z1x",
        \ "!GLOB_BLOB_4\tBLO\t0z12 ab",
        \ "!GLOB_LIST_1\tLIS\t1 2",
        \ "!GLOB_DICT_1\tDIC\t1 2"], 'Xviminfo')
  call assert_fails('rv! Xviminfo', 'E15:')
  call assert_equal('123', g:GLOB_BLOB_1)
  call assert_equal(1, type(g:GLOB_BLOB_1))
  call assert_equal('012', g:GLOB_BLOB_2)
  call assert_equal(1, type(g:GLOB_BLOB_2))
  call assert_equal('0z1x', g:GLOB_BLOB_3)
  call assert_equal(1, type(g:GLOB_BLOB_3))
  call assert_equal('0z12 ab', g:GLOB_BLOB_4)
  call assert_equal(1, type(g:GLOB_BLOB_4))
  call assert_equal('1 2', g:GLOB_LIST_1)
  call assert_equal(1, type(g:GLOB_LIST_1))
  call assert_equal('1 2', g:GLOB_DICT_1)
  call assert_equal(1, type(g:GLOB_DICT_1))

  call delete('Xviminfo')
  set viminfo-=!
endfunc

func Test_global_vars_with_circular_reference()
  let g:MY_GLOBAL_LIST = []
  call add(g:MY_GLOBAL_LIST, g:MY_GLOBAL_LIST)
  let g:MY_GLOBAL_DICT = {}
  let g:MY_GLOBAL_DICT['self'] = g:MY_GLOBAL_DICT

  set viminfo='100,<50,s10,h,!,nviminfo
  wv! Xviminfo
  call assert_equal(v:errmsg, '')

  unlet g:MY_GLOBAL_LIST
  unlet g:MY_GLOBAL_DICT

  rv! Xviminfo
  call assert_equal(v:errmsg, '')
  call assert_true(!exists('g:MY_GLOBAL_LIST'))
  call assert_true(!exists('g:MY_GLOBAL_DICT'))

  call delete('Xviminfo')
  set viminfo-=!
endfunc

func Test_cmdline_history()
  call histdel(':')
  call test_settime(11)
  call histadd(':', "echo 'one'")
  call test_settime(12)
  " split into two lines
  let long800 = repeat(" 'eight'", 100)
  call histadd(':', "echo " . long800)
  call test_settime(13)
  " split into three lines
  let long1400 = repeat(" 'fourteeeeen'", 100)
  call histadd(':', "echo " . long1400)
  wviminfo Xviminfo
  let lines = readfile('Xviminfo')
  let done_colon = 0
  let done_bar = 0
  let lnum = 0
  while lnum < len(lines)
    let line = lines[lnum] | let lnum += 1
    if line[0] == ':'
      if done_colon == 0
	call assert_equal(":\x161408", line)
	let line = lines[lnum] | let lnum += 1
	call assert_equal('<echo ' . long1400, line)
      elseif done_colon == 1
	call assert_equal(":\x16808", line)
	let line = lines[lnum] | let lnum += 1
	call assert_equal("<echo " . long800, line)
      elseif done_colon == 2
	call assert_equal(":echo 'one'", line)
      endif
      let done_colon += 1
    elseif line[0:4] == '|2,0,'
      if done_bar == 0
	call assert_equal("|2,0,13,,>1407", line)
	let line = lines[lnum] | let lnum += 1
	call assert_equal('|<"echo ' . long1400[0:484], line)
	let line = lines[lnum] | let lnum += 1
	call assert_equal('|<' . long1400[485:974], line)
	let line = lines[lnum] | let lnum += 1
	call assert_equal('|<' . long1400[975:] . '"', line)
      elseif done_bar == 1
	call assert_equal('|2,0,12,,>807', line)
	let line = lines[lnum] | let lnum += 1
	call assert_equal('|<"echo ' . long800[0:484], line)
	let line = lines[lnum] | let lnum += 1
	call assert_equal('|<' . long800[485:] . '"', line)
      elseif done_bar == 2
	call assert_equal("|2,0,11,,\"echo 'one'\"", line)
      endif
      let done_bar += 1
    endif
  endwhile
  call assert_equal(3, done_colon)
  call assert_equal(3, done_bar)

  call histdel(':')
  rviminfo Xviminfo
  call assert_equal("echo " . long1400, histget(':', -1))
  call assert_equal("echo " . long800, histget(':', -2))
  call assert_equal("echo 'one'", histget(':', -3))

  call delete('Xviminfo')
endfunc

func Test_cmdline_history_order()
  call histdel(':')
  call test_settime(11)
  call histadd(':', "echo '11'")
  call test_settime(22)
  call histadd(':', "echo '22'")
  call test_settime(33)
  call histadd(':', "echo '33'")
  wviminfo Xviminfo

  call histdel(':')
  " items go in between
  call test_settime(15)
  call histadd(':', "echo '15'")
  call test_settime(27)
  call histadd(':', "echo '27'")

  rviminfo Xviminfo
  call assert_equal("echo '33'", histget(':', -1))
  call assert_equal("echo '27'", histget(':', -2))
  call assert_equal("echo '22'", histget(':', -3))
  call assert_equal("echo '15'", histget(':', -4))
  call assert_equal("echo '11'", histget(':', -5))

  call histdel(':')
  " items go before and after
  eval 8->test_settime()
  call histadd(':', "echo '8'")
  call test_settime(39)
  call histadd(':', "echo '39'")

  rviminfo Xviminfo
  call assert_equal("echo '39'", histget(':', -1))
  call assert_equal("echo '33'", histget(':', -2))
  call assert_equal("echo '22'", histget(':', -3))
  call assert_equal("echo '11'", histget(':', -4))
  call assert_equal("echo '8'", histget(':', -5))

  " Check sorting works when writing with merge.
  call histdel(':')
  call test_settime(8)
  call histadd(':', "echo '8'")
  call test_settime(15)
  call histadd(':', "echo '15'")
  call test_settime(27)
  call histadd(':', "echo '27'")
  call test_settime(39)
  call histadd(':', "echo '39'")
  wviminfo Xviminfo
  
  call histdel(':')
  rviminfo Xviminfo
  call assert_equal("echo '39'", histget(':', -1))
  call assert_equal("echo '33'", histget(':', -2))
  call assert_equal("echo '27'", histget(':', -3))
  call assert_equal("echo '22'", histget(':', -4))
  call assert_equal("echo '15'", histget(':', -5))
  call assert_equal("echo '11'", histget(':', -6))
  call assert_equal("echo '8'", histget(':', -7))

  call delete('Xviminfo')
endfunc

func Test_viminfo_registers()
  call test_settime(8)
  call setreg('a', "eight", 'c')
  call test_settime(20)
  call setreg('b', ["twenty", "again"], 'l')
  call test_settime(40)
  call setreg('c', ["four", "agai"], 'b4')
  let l = []
  set viminfo='100,<600,s10,h,!,nviminfo
  for i in range(500)
    call add(l, 'something')
  endfor
  call setreg('d', l, 'l')
  call setreg('e', "abc\<C-V>xyz")
  wviminfo Xviminfo

  call test_settime(10)
  call setreg('a', '', 'b10')
  call test_settime(15)
  call setreg('b', 'drop')
  call test_settime(50)
  call setreg('c', 'keep', 'l')
  call test_settime(30)
  call setreg('d', 'drop', 'l')
  call setreg('e', 'drop')
  rviminfo Xviminfo

  call assert_equal("", getreg('a'))
  call assert_equal("\<C-V>10", getregtype('a'))
  call assert_equal("twenty\nagain\n", getreg('b'))
  call assert_equal("V", getregtype('b'))
  call assert_equal("keep\n", getreg('c'))
  call assert_equal("V", getregtype('c'))
  call assert_equal(l, getreg('d', 1, 1))
  call assert_equal("V", getregtype('d'))
  call assert_equal("abc\<C-V>xyz", getreg('e'))

  " Length around 440 switches to line continuation.
  let len = 434
  while len < 445
    let s = repeat('a', len)
    call setreg('"', s)
    wviminfo Xviminfo
    call setreg('"', '')
    rviminfo Xviminfo
    call assert_equal(s, getreg('"'), 'wrong register at length: ' . len)

    let len += 1
  endwhile

  call delete('Xviminfo')
endfunc

func Test_viminfo_marks()
  sp bufa
  let bufa = bufnr('%')
  sp bufb
  let bufb = bufnr('%')

  call test_settime(8)
  call setpos("'A", [bufa, 1, 1, 0])
  call test_settime(20)
  call setpos("'B", [bufb, 9, 1, 0])
  call setpos("'C", [bufa, 7, 1, 0])

  delmark 0-9
  call test_settime(25)
  call setpos("'1", [bufb, 12, 1, 0])
  call test_settime(35)
  call setpos("'0", [bufa, 11, 1, 0])

  call test_settime(45)
  wviminfo Xviminfo

  " Writing viminfo inserts the '0 mark.
  call assert_equal([bufb, 1, 1, 0], getpos("'0"))
  call assert_equal([bufa, 11, 1, 0], getpos("'1"))
  call assert_equal([bufb, 12, 1, 0], getpos("'2"))

  call test_settime(4)
  call setpos("'A", [bufa, 9, 1, 0])
  call test_settime(30)
  call setpos("'B", [bufb, 2, 3, 0])
  delmark C

  delmark 0-9
  call test_settime(30)
  call setpos("'1", [bufb, 22, 1, 0])
  call test_settime(55)
  call setpos("'0", [bufa, 21, 1, 0])

  rviminfo Xviminfo

  call assert_equal([bufa, 1, 1, 0], getpos("'A"))
  call assert_equal([bufb, 2, 3, 0], getpos("'B"))
  call assert_equal([bufa, 7, 1, 0], getpos("'C"))

  " numbered marks are merged
  call assert_equal([bufa, 21, 1, 0], getpos("'0"))  " time 55
  call assert_equal([bufb, 1, 1, 0], getpos("'1"))  " time 45
  call assert_equal([bufa, 11, 1, 0], getpos("'2")) " time 35
  call assert_equal([bufb, 22, 1, 0], getpos("'3")) " time 30
  call assert_equal([bufb, 12, 1, 0], getpos("'4")) " time 25

  " deleted file marks are removed from viminfo
  delmark C
  wviminfo Xviminfo
  rviminfo Xviminfo
  call assert_equal([0, 0, 0, 0], getpos("'C"))

  " deleted file marks stay in viminfo if defined in another vim later
  call test_settime(70)
  call setpos("'D", [bufb, 8, 1, 0])
  wviminfo Xviminfo
  call test_settime(65)
  delmark D
  call assert_equal([0, 0, 0, 0], getpos("'D"))
  call test_settime(75)
  rviminfo Xviminfo
  call assert_equal([bufb, 8, 1, 0], getpos("'D"))

  call delete('Xviminfo')
  exe 'bwipe ' . bufa
  exe 'bwipe ' . bufb
endfunc

func Test_viminfo_jumplist()
  split testbuf
  clearjumps
  call setline(1, ['time 05', 'time 10', 'time 15', 'time 20', 'time 30', 'last pos'])
  call cursor(2, 1)
  call test_settime(10)
  exe "normal /20\r"
  call test_settime(20)
  exe "normal /30\r"
  call test_settime(30)
  exe "normal /last pos\r"
  wviminfo Xviminfo

  clearjumps
  call cursor(1, 1)
  call test_settime(5)
  exe "normal /15\r"
  call test_settime(15)
  exe "normal /last pos\r"
  call test_settime(40)
  exe "normal ?30\r"
  rviminfo Xviminfo

  call assert_equal('time 30', getline('.'))
  exe "normal \<C-O>"
  call assert_equal('last pos', getline('.'))
  exe "normal \<C-O>"
  " duplicate for 'time 30' was removed
  call assert_equal('time 20', getline('.'))
  exe "normal \<C-O>"
  call assert_equal('time 15', getline('.'))
  exe "normal \<C-O>"
  call assert_equal('time 10', getline('.'))
  exe "normal \<C-O>"
  call assert_equal('time 05', getline('.'))

  clearjumps
  call cursor(1, 1)
  call test_settime(5)
  exe "normal /15\r"
  call test_settime(15)
  exe "normal /last pos\r"
  call test_settime(40)
  exe "normal ?30\r"
  " Test merge when writing
  wviminfo Xviminfo
  clearjumps
  rviminfo Xviminfo

  let last_line = line('.')
  exe "normal \<C-O>"
  call assert_equal('time 30', getline('.'))
  exe "normal \<C-O>"
  call assert_equal('last pos', getline('.'))
  exe "normal \<C-O>"
  " duplicate for 'time 30' was removed
  call assert_equal('time 20', getline('.'))
  exe "normal \<C-O>"
  call assert_equal('time 15', getline('.'))
  exe "normal \<C-O>"
  call assert_equal('time 10', getline('.'))
  exe "normal \<C-O>"
  call assert_equal('time 05', getline('.'))

  " Test with jumplist full.
  clearjumps
  call setline(1, repeat(['match here'], 101))
  call cursor(1, 1)
  call test_settime(10)
  for i in range(100)
    exe "normal /here\r"
  endfor
  rviminfo Xviminfo

  " must be newest mark that comes from viminfo.
  exe "normal \<C-O>"
  call assert_equal(last_line, line('.'))

  bwipe!
  call delete('Xviminfo')
endfunc

func Test_viminfo_encoding()
  set enc=latin1
  call histdel(':')
  call histadd(':', "echo '\xe9'")
  wviminfo Xviminfo

  set fencs=utf-8,latin1
  set enc=utf-8
  sp Xviminfo
  call assert_equal('latin1', &fenc)
  close
  
  call histdel(':')
  rviminfo Xviminfo
  call assert_equal("echo 'é'", histget(':', -1))

  call delete('Xviminfo')
endfunc

func Test_viminfo_bad_syntax()
  let lines = []
  call add(lines, '|<')  " empty continuation line
  call add(lines, '|234234234234234324,nothing')
  call add(lines, '|1+"no comma"')
  call add(lines, '|1,2,3,4,5,6,7')  " too many items
  call add(lines, '|1,"string version"')
  call add(lines, '|1,>x') " bad continuation line
  call add(lines, '|1,"x') " missing quote
  call add(lines, '|1,"x\') " trailing backslash
  call add(lines, '|1,,,,') "trailing comma
  call add(lines, '|1,>234') " trailing continuation line
  call writefile(lines, 'Xviminfo')
  rviminfo Xviminfo

  call delete('Xviminfo')
endfunc

func Test_viminfo_file_marks()
  silent! bwipe test_viminfo.vim
  silent! bwipe Xviminfo

  call test_settime(10)
  edit ten
  call test_settime(25)
  edit again
  call test_settime(30)
  edit thirty
  wviminfo Xviminfo

  call test_settime(20)
  edit twenty
  call test_settime(35)
  edit again
  call test_settime(40)
  edit fourty
  wviminfo Xviminfo

  sp Xviminfo
  1
  for name in ['fourty', 'again', 'thirty', 'twenty', 'ten']
    /^>
    call assert_equal(name, substitute(getline('.'), '.*/', '', ''))
  endfor
  close

  call delete('Xviminfo')
endfunc

func Test_viminfo_file_mark_tabclose()
  tabnew Xtestfileintab
  call setline(1, ['a','b','c','d','e'])
  4
  q!
  wviminfo Xviminfo
  sp Xviminfo
  /^> .*Xtestfileintab
  let lnum = line('.')
  while 1
    if lnum == line('$')
      call assert_report('mark not found in Xtestfileintab')
      break
    endif
    let lnum += 1
    let line = getline(lnum)
    if line == ''
      call assert_report('mark not found in Xtestfileintab')
      break
    endif
    if line =~ "^\t\""
      call assert_equal('4', substitute(line, ".*\"\t\\(\\d\\).*", '\1', ''))
      break
    endif
  endwhile

  call delete('Xviminfo')
  silent! bwipe Xtestfileintab
endfunc

func Test_viminfo_file_mark_zero_time()
  let lines = [
	\ '# Viminfo version',
	\ '|1,4',
	\ '',
	\ '*encoding=utf-8',
	\ '',
	\ '# File marks:',
	\ "'B  1  0  /tmp/nothing",
	\ '|4,66,1,0,0,"/tmp/nothing"',
	\ "",
	\ ]
  call writefile(lines, 'Xviminfo')
  delmark B
  rviminfo Xviminfo
  call delete('Xviminfo')
  call assert_equal(1, line("'B"))
  delmark B
endfunc

" Test for saving and restoring file marks in unloaded buffers
func Test_viminfo_file_mark_unloaded_buf()
  let save_viminfo = &viminfo
  set viminfo&vim
  call writefile(repeat(['vim'], 10), 'Xfile1')
  %bwipe
  edit! Xfile1
  call setpos("'u", [0, 3, 1, 0])
  call setpos("'v", [0, 5, 1, 0])
  enew
  wviminfo Xviminfo
  %bwipe
  edit Xfile1
  rviminfo! Xviminfo
  call assert_equal([0, 3, 1, 0], getpos("'u"))
  call assert_equal([0, 5, 1, 0], getpos("'v"))
  %bwipe
  call delete('Xfile1')
  call delete('Xviminfo')
  let &viminfo = save_viminfo
endfunc

func Test_viminfo_oldfiles()
  let v:oldfiles = []
  let lines = [
	\ '# comment line',
	\ '*encoding=utf-8',
	\ '',
	\ ':h viminfo',
	\ '?/session',
	\ '=myvar',
	\ '@123',
	\ '',
	\ "'E  2  0  /tmp/nothing",
	\ '',
	\ "> /tmp/file_one.txt",
	\ "\t\"\t11\t0",
	\ "",
	\ "> /tmp/file_two.txt",
	\ "\t\"\t11\t0",
	\ "",
	\ "> /tmp/another.txt",
	\ "\t\"\t11\t0",
	\ "",
	\ ]
  call writefile(lines, 'Xviminfo')
  delmark E
  edit /tmp/file_two.txt
  rviminfo! Xviminfo
  call delete('Xviminfo')

  call assert_equal('h viminfo', histget(':'))
  call assert_equal('session', histget('/'))
  call assert_equal('myvar', histget('='))
  call assert_equal('123', histget('@'))
  call assert_equal(2, line("'E"))
  call assert_equal(['1: /tmp/file_one.txt', '2: /tmp/file_two.txt', '3: /tmp/another.txt'], filter(split(execute('oldfiles'), "\n"), {i, v -> v =~ '/tmp/'}))
  call assert_equal(['1: /tmp/file_one.txt', '2: /tmp/file_two.txt'], filter(split(execute('filter file_ oldfiles'), "\n"), {i, v -> v =~ '/tmp/'}))
  call assert_equal(['3: /tmp/another.txt'], filter(split(execute('filter /another/ oldfiles'), "\n"), {i, v -> v =~ '/tmp/'}))

  new
  call feedkeys("3\<CR>", 't')
  browse oldfiles
  call assert_equal("/tmp/another.txt", expand("%"))
  bwipe
  delmark E
endfunc

" Test for storing and restoring buffer list in 'viminfo'
func Test_viminfo_bufferlist()
  " If there are arguments, then :rviminfo doesn't read the buffer list.
  " Need to delete all the arguments for :rviminfo to work.
  %argdelete

  edit Xfile1
  edit Xfile2
  set viminfo-=%
  wviminfo Xviminfo
  %bwipe
  rviminfo Xviminfo
  call assert_equal(1, len(getbufinfo()))

  edit Xfile1
  edit Xfile2
  set viminfo^=%
  wviminfo Xviminfo
  %bwipe
  rviminfo Xviminfo
  let l = getbufinfo()
  call assert_equal(3, len(l))
  call assert_equal('Xfile1', bufname(l[1].bufnr))
  call assert_equal('Xfile2', bufname(l[2].bufnr))

  call delete('Xviminfo')
  %bwipe
  set viminfo-=%
endfunc

" Test for errors in a viminfo file
func Test_viminfo_error()
  " Non-existing viminfo files
  call assert_fails('rviminfo xyz', 'E195:')

  " Illegal starting character
  call writefile(["a 123"], 'Xviminfo')
  call assert_fails('rv Xviminfo', 'E575:')

  " Illegal register name in the viminfo file
  call writefile(['"@	LINE	0'], 'Xviminfo')
  call assert_fails('rv Xviminfo', 'E577:')

  " Invalid file mark line
  call writefile(['>', '@'], 'Xviminfo')
  call assert_fails('rv Xviminfo', 'E576:')

  " Too many errors in viminfo file
  call writefile(repeat(["a 123"], 15), 'Xviminfo')
  call assert_fails('rv Xviminfo', 'E575:')

  call writefile(['>'] + repeat(['@'], 10), 'Xviminfo')
  call assert_fails('rv Xviminfo', 'E576:')

  call writefile(repeat(['"@'], 15), 'Xviminfo')
  call assert_fails('rv Xviminfo', 'E577:')

  call delete('Xviminfo')
endfunc

" Test for saving and restoring last substitute string in viminfo
func Test_viminfo_lastsub()
  enew
  call append(0, "blue blue blue")
  call cursor(1, 1)
  s/blue/green/
  wviminfo Xviminfo
  s/blue/yellow/
  rviminfo! Xviminfo
  &
  call assert_equal("green yellow green", getline(1))
  enew!
  call delete('Xviminfo')
endfunc

" Test saving and restoring the register values using the older method
func Test_viminfo_registers_old()
  let lines = [
	\ '# Viminfo version',
	\ '|1,1',
	\ '',
	\ '*encoding=utf-8',
	\ '',
	\ '# Registers:',
	\ '""0 CHAR  0',
	\ '	Vim',
	\ '"a  CHAR  0',
	\ '	red',
	\ '"m@ CHAR  0',
	\ "	:echo 'Hello'\<CR>",
	\ "",
	\ ]
  call writefile(lines, 'Xviminfo')
  let @a = 'one'
  let @b = 'two'
  let @m = 'three'
  let @" = 'four'
  let @t = ":echo 'Unix'\<CR>"
  silent! normal @t
  rviminfo! Xviminfo
  call assert_equal('red', getreg('a'))
  call assert_equal('two', getreg('b'))
  call assert_equal(":echo 'Hello'\<CR>", getreg('m'))
  call assert_equal('Vim', getreg('"'))
  call assert_equal("\nHello", execute('normal @@'))
  call delete('Xviminfo')
  let @" = ''
endfunc

" Test for saving and restoring large number of lines in a register
func Test_viminfo_large_register()
  let save_viminfo = &viminfo
  set viminfo&vim
  set viminfo-=<50
  set viminfo+=<200
  let lines = ['"r	CHAR	0']
  call extend(lines, repeat(["\tsun is rising"], 200))
  call writefile(lines, 'Xviminfo')
  let @r = ''
  rviminfo! Xviminfo
  call assert_equal(join(repeat(["sun is rising"], 200), "\n"), @r)
  call delete('Xviminfo')
  let @r = ''
  let &viminfo = save_viminfo
endfunc

" Test for setting 'viminfofile' to NONE
func Test_viminfofile_none()
  let save_vif = &viminfofile
  set viminfofile=NONE
  wviminfo Xviminfo
  call assert_false(filereadable('Xviminfo'))
  call writefile([''], 'Xviminfo')
  call assert_fails('rviminfo Xviminfo', 'E195:')
  call delete('Xviminfo')
  let &viminfofile = save_vif
endfunc

" Test for an unwritable and unreadble 'viminfo' file
func Test_viminfo_perm()
  CheckUnix
  CheckNotRoot
  call writefile([''], 'Xviminfo')
  call setfperm('Xviminfo', 'r-x------')
  call assert_fails('wviminfo Xviminfo', 'E137:')
  call setfperm('Xviminfo', '--x------')
  call assert_fails('rviminfo Xviminfo', 'E195:')
  call delete('Xviminfo')

  " Try to write the viminfo to a directory
  call mkdir('Xdir')
  call assert_fails('wviminfo Xdir', 'E137:')
  call delete('Xdir', 'rf')
endfunc

" Test for writing to an existing viminfo file merges the file marks
func XTest_viminfo_marks_merge()
  let save_viminfo = &viminfo
  set viminfo&vim
  set viminfo^=%
  enew
  %argdelete
  %bwipe

  call writefile(repeat(['editor'], 10), 'Xbufa')
  call writefile(repeat(['Vim'], 10), 'Xbufb')

  " set marks in buffers
  call test_settime(10)
  edit Xbufa
  4mark a
  wviminfo Xviminfo
  edit Xbufb
  4mark b
  wviminfo Xviminfo
  %bwipe

  " set marks in buffers again
  call test_settime(20)
  edit Xbufb
  6mark b
  wviminfo Xviminfo
  edit Xbufa
  6mark a
  wviminfo Xviminfo
  %bwipe

  " Load the buffer and check the marks
  edit Xbufa
  rviminfo! Xviminfo
  call assert_equal(6, line("'a"))
  edit Xbufb
  rviminfo! Xviminfo
  call assert_equal(6, line("'b"))

  " cleanup
  %bwipe
  call delete('Xviminfo')
  call delete('Xbufa')
  call delete('Xbufb')
  call test_settime(0)
  let &viminfo=save_viminfo
endfunc

" Test for errors in setting 'viminfo'
func Test_viminfo_option_error()
  " Missing number
  call assert_fails('set viminfo=\"', 'E526:')
  for c in split("'/:<@s", '\zs')
    call assert_fails('set viminfo=' .. c, 'E526:')
  endfor

  " Missing comma
  call assert_fails('set viminfo=%10!', 'E527:')
  call assert_fails('set viminfo=!%10', 'E527:')
  call assert_fails('set viminfo=h%10', 'E527:')
  call assert_fails('set viminfo=c%10', 'E527:')
  call assert_fails('set viminfo=:10%10', 'E527:')

  " Missing ' setting
  call assert_fails('set viminfo=%10', 'E528:')
endfunc

func Test_viminfo_oldfiles_newfile()
  CheckRunVimInTerminal

  let save_viminfo = &viminfo
  let save_viminfofile = &viminfofile
  set viminfo&vim
  let v:oldfiles = []
  let commands =<< trim [CODE]
    set viminfofile=Xviminfofile
    set viminfo&vim
    w! Xnew-file.txt
    qall
  [CODE]
  call writefile(commands, 'Xviminfotest')
  let buf = RunVimInTerminal('-S Xviminfotest', #{wait_for_ruler: 0})
  call WaitForAssert({-> assert_equal("finished", term_getstatus(buf))})

  let &viminfofile = 'Xviminfofile'
  rviminfo! Xviminfofile
  call assert_match('Xnew-file.txt$', v:oldfiles[0])
  call assert_equal(1, len(v:oldfiles))
  call delete('Xviminfofile')
  call delete('Xviminfotest')
  call delete('Xnew-file.txt')

  let v:oldfiles = test_null_list()
  call assert_equal("\nNo old files", execute('oldfiles'))

  let &viminfo = save_viminfo
  let &viminfofile = save_viminfofile
endfunc

" vim: shiftwidth=2 sts=2 expandtab