" Tests for :help! {subject}

func Test_help_tagjump()
  help
  call assert_equal("help", &filetype)
  call assert_true(getline('.') =~ '\*help.txt\*')
  helpclose

  exec "help! ('textwidth'"
  call assert_equal("help", &filetype)
  call assert_true(getline('.') =~ "\\*'textwidth'\\*")
  helpclose

  exec "help! ('buflisted'),"
  call assert_equal("help", &filetype)
  call assert_true(getline('.') =~ "\\*'buflisted'\\*")
  helpclose

  exec "help! abs({expr})"
  call assert_equal("help", &filetype)
  call assert_true(getline('.') =~ '\*abs()\*')
  helpclose

  exec "help! arglistid([{winnr}"
  call assert_equal("help", &filetype)
  call assert_true(getline('.') =~ '\*arglistid()\*')
  helpclose

  exec "help! 'autoindent'."
  call assert_equal("help", &filetype)
  call assert_true(getline('.') =~ "\\*'autoindent'\\*")
  helpclose

  exec "help! {address}."
  call assert_equal("help", &filetype)
  call assert_true(getline('.') =~ '\*{address}\*')
  helpclose
endfunc

let s:langs = ['en', 'ab', 'ja']

func s:doc_config_setup()
  let s:helpfile_save = &helpfile
  let &helpfile="Xdir1/doc-en/doc/testdoc.txt"
  let s:rtp_save = &rtp
  let &rtp="Xdir1/doc-en"
  if has('multi_lang')
    let s:helplang_save=&helplang
  endif

  call delete('Xdir1', 'rf')

  for lang in s:langs
    if lang ==# 'en'
      let tagfname = 'tags'
      let docfname = 'testdoc.txt'
    else
      let tagfname = 'tags-' . lang
      let docfname = 'testdoc.' . lang . 'x'
    endif
    let docdir = "Xdir1/doc-" . lang . "/doc"
    call mkdir(docdir, "p")
    call writefile(["\t*test-char*", "\t*test-col*"], docdir . '/' . docfname)
    call writefile(["test-char\t" . docfname . "\t/*test-char*",
          \         "test-col\t" . docfname . "\t/*test-col*"],
          \         docdir . '/' . tagfname)
  endfor
endfunc

func s:doc_config_teardown()
  call delete('Xdir1', 'rf')

  let &helpfile = s:helpfile_save
  let &rtp = s:rtp_save
  if has('multi_lang')
    let &helplang = s:helplang_save
  endif
endfunc

func s:get_cmd_compl_list(cmd)
  let list = []
  let str = ''
  for cnt in range(1, 999)
    call feedkeys(a:cmd . repeat("\<Tab>", cnt) . "'\<C-B>let str='\<CR>", 'tx')
    if str ==# a:cmd[1:]
      break
    endif
    call add(list, str)
  endfor
  return list
endfunc

func Test_help_complete()
  try
    let list = []
    call s:doc_config_setup()

    " 'helplang=' and help file lang is 'en'
    if has('multi_lang')
      set helplang=
    endif
    let list = s:get_cmd_compl_list(":h test")
    call assert_equal(['h test-col', 'h test-char'], list)

    if has('multi_lang')
      " 'helplang=ab' and help file lang is 'en'
      set helplang=ab
      let list = s:get_cmd_compl_list(":h test")
      call assert_equal(['h test-col', 'h test-char'], list)

      " 'helplang=' and help file lang is 'en' and 'ab'
      set rtp+=Xdir1/doc-ab
      set helplang=
      let list = s:get_cmd_compl_list(":h test")
      call assert_equal(sort(['h test-col@en', 'h test-col@ab',
            \             'h test-char@en', 'h test-char@ab']), sort(list))

      " 'helplang=ab' and help file lang is 'en' and 'ab'
      set helplang=ab
      let list = s:get_cmd_compl_list(":h test")
      call assert_equal(sort(['h test-col', 'h test-col@en',
            \             'h test-char', 'h test-char@en']), sort(list))

      " 'helplang=' and help file lang is 'en', 'ab' and 'ja'
      set rtp+=Xdir1/doc-ja
      set helplang=
      let list = s:get_cmd_compl_list(":h test")
      call assert_equal(sort(['h test-col@en', 'h test-col@ab',
            \             'h test-col@ja', 'h test-char@en',
            \             'h test-char@ab', 'h test-char@ja']), sort(list))

      " 'helplang=ab' and help file lang is 'en', 'ab' and 'ja'
      set helplang=ab
      let list = s:get_cmd_compl_list(":h test")
      call assert_equal(sort(['h test-col', 'h test-col@en',
            \             'h test-col@ja', 'h test-char',
            \             'h test-char@en', 'h test-char@ja']), sort(list))

      " 'helplang=ab,ja' and help file lang is 'en', 'ab' and 'ja'
      set helplang=ab,ja
      let list = s:get_cmd_compl_list(":h test")
      call assert_equal(sort(['h test-col', 'h test-col@ja',
            \             'h test-col@en', 'h test-char',
            \             'h test-char@ja', 'h test-char@en']), sort(list))
    endif
  catch
    call assert_exception('X')
  finally
    call s:doc_config_teardown()
  endtry
endfunc

" vim: shiftwidth=2 sts=2 expandtab