" Tests for regexp in utf8 encoding

func s:equivalence_test()
  let str = "AÀÁÂÃÄÅĀĂĄǍǞǠẢ BḂḆ CÇĆĈĊČ DĎĐḊḎḐ EÈÉÊËĒĔĖĘĚẺẼ FḞ GĜĞĠĢǤǦǴḠ HĤĦḢḦḨ IÌÍÎÏĨĪĬĮİǏỈ JĴ KĶǨḰḴ LĹĻĽĿŁḺ MḾṀ NÑŃŅŇṄṈ OÒÓÔÕÖØŌŎŐƠǑǪǬỎ PṔṖ Q RŔŖŘṘṞ SŚŜŞŠṠ TŢŤŦṪṮ UÙÚÛÜŨŪŬŮŰŲƯǓỦ VṼ WŴẀẂẄẆ XẊẌ YÝŶŸẎỲỶỸ ZŹŻŽƵẐẔ aàáâãäåāăąǎǟǡả bḃḇ cçćĉċč dďđḋḏḑ eèéêëēĕėęěẻẽ fḟ gĝğġģǥǧǵḡ hĥħḣḧḩẖ iìíîïĩīĭįǐỉ jĵǰ kķǩḱḵ lĺļľŀłḻ mḿṁ nñńņňŉṅṉ oòóôõöøōŏőơǒǫǭỏ pṕṗ q rŕŗřṙṟ sśŝşšṡ tţťŧṫṯẗ uùúûüũūŭůűųưǔủ vṽ wŵẁẃẅẇẘ xẋẍ yýÿŷẏẙỳỷỹ zźżžƶẑẕ"
  let groups = split(str)
  for group1 in groups
    for c in split(group1, '\zs')
      " next statement confirms that equivalence class matches every
      " character in group
      call assert_match('^[[=' . c . '=]]*$', group1)
      for group2 in groups
        if group2 != group1
          " next statement converts that equivalence class doesn't match
          " character in any other group
          call assert_equal(-1, match(group2, '[[=' . c . '=]]'))
        endif
      endfor
    endfor
  endfor
endfunc

func Test_equivalence_re1()
  set re=1
  call s:equivalence_test()
  set re=0
endfunc

func Test_equivalence_re2()
  set re=2
  call s:equivalence_test()
  set re=0
endfunc

func s:classes_test()
  if has('win32')
    set iskeyword=@,48-57,_,192-255
  endif
  set isprint=@,161-255
  call assert_equal('Motörhead', matchstr('Motörhead', '[[:print:]]\+'))

  let alnumchars = ''
  let alphachars = ''
  let backspacechar = ''
  let blankchars = ''
  let cntrlchars = ''
  let digitchars = ''
  let escapechar = ''
  let graphchars = ''
  let lowerchars = ''
  let printchars = ''
  let punctchars = ''
  let returnchar = ''
  let spacechars = ''
  let tabchar = ''
  let upperchars = ''
  let xdigitchars = ''
  let identchars = ''
  let identchars1 = ''
  let kwordchars = ''
  let kwordchars1 = ''
  let fnamechars = ''
  let fnamechars1 = ''
  let i = 1
  while i <= 255
    let c = nr2char(i)
    if c =~ '[[:alpha:]]'
      let alphachars .= c
    endif
    if c =~ '[[:alnum:]]'
      let alnumchars .= c
    endif
    if c =~ '[[:backspace:]]'
      let backspacechar .= c
    endif
    if c =~ '[[:blank:]]'
      let blankchars .= c
    endif
    if c =~ '[[:cntrl:]]'
      let cntrlchars .= c
    endif
    if c =~ '[[:digit:]]'
      let digitchars .= c
    endif
    if c =~ '[[:escape:]]'
      let escapechar .= c
    endif
    if c =~ '[[:graph:]]'
      let graphchars .= c
    endif
    if c =~ '[[:lower:]]'
      let lowerchars .= c
    endif
    if c =~ '[[:print:]]'
      let printchars .= c
    endif
    if c =~ '[[:punct:]]'
      let punctchars .= c
    endif
    if c =~ '[[:return:]]'
      let returnchar .= c
    endif
    if c =~ '[[:space:]]'
      let spacechars .= c
    endif
    if c =~ '[[:tab:]]'
      let tabchar .= c
    endif
    if c =~ '[[:upper:]]'
      let upperchars .= c
    endif
    if c =~ '[[:xdigit:]]'
      let xdigitchars .= c
    endif
    if c =~ '[[:ident:]]'
      let identchars .= c
    endif
    if c =~ '\i'
      let identchars1 .= c
    endif
    if c =~ '[[:keyword:]]'
      let kwordchars .= c
    endif
    if c =~ '\k'
      let kwordchars1 .= c
    endif
    if c =~ '[[:fname:]]'
      let fnamechars .= c
    endif
    if c =~ '\f'
      let fnamechars1 .= c
    endif
    let i += 1
  endwhile

  call assert_equal('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz', alphachars)
  call assert_equal('0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz', alnumchars)
  call assert_equal("\b", backspacechar)
  call assert_equal("\t ", blankchars)
  call assert_equal("\x01\x02\x03\x04\x05\x06\x07\b\t\n\x0b\f\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\e\x1c\x1d\x1e\x1f\x7f", cntrlchars)
  call assert_equal("0123456789", digitchars)
  call assert_equal("\<Esc>", escapechar)
  call assert_equal('!"#$%&''()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~', graphchars)
  call assert_equal('abcdefghijklmnopqrstuvwxyzµßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ', lowerchars)
  call assert_equal(' !"#$%&''()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ', printchars)
  call assert_equal('!"#$%&''()*+,-./:;<=>?@[\]^_`{|}~', punctchars)
  call assert_equal('ABCDEFGHIJKLMNOPQRSTUVWXYZÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞ', upperchars)
  call assert_equal("\r", returnchar)
  call assert_equal("\t\n\x0b\f\r ", spacechars)
  call assert_equal("\t", tabchar)
  call assert_equal('0123456789ABCDEFabcdef', xdigitchars)

  if has('win32')
    let identchars_ok = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz ¡¢£¤¥¦§µÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ'
    let kwordchars_ok = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyzµÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ'
  elseif has('ebcdic')
    let identchars_ok = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz¬®µº¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ'
    let kwordchars_ok = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz¬®µº¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ'
  else
    let identchars_ok = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyzµÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ'
    let kwordchars_ok = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyzµÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ'
  endif

  if has('win32')
    let fnamechars_ok = '!#$%+,-./0123456789:=@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]_abcdefghijklmnopqrstuvwxyz{}~ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ'
  elseif has('amiga')
    let fnamechars_ok = '$+,-./0123456789:ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz~ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ'
  elseif has('vms')
    let fnamechars_ok = '#$%+,-./0123456789:;<>ABCDEFGHIJKLMNOPQRSTUVWXYZ[]_abcdefghijklmnopqrstuvwxyz~ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ'
  elseif has('ebcdic')
    let fnamechars_ok = '#$%+,-./=ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz~ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ'
  else
    let fnamechars_ok = '#$%+,-./0123456789=ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz~ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ'
  endif

  call assert_equal(identchars_ok, identchars)
  call assert_equal(kwordchars_ok, kwordchars)
  call assert_equal(fnamechars_ok, fnamechars)

  call assert_equal(identchars1, identchars)
  call assert_equal(kwordchars1, kwordchars)
  call assert_equal(fnamechars1, fnamechars)
endfunc

func Test_classes_re1()
  set re=1
  call s:classes_test()
  set re=0
endfunc

func Test_classes_re2()
  set re=2
  call s:classes_test()
  set re=0
endfunc

func Test_recursive_substitute()
  new
  s/^/\=execute("s#^##gn")
  " check we are now not in the sandbox
  call setwinvar(1, 'myvar', 1)
  bwipe!
endfunc

func Test_nested_backrefs()
  " Check example in change.txt.
  new
  for re in range(0, 2)
    exe 'set re=' . re
    call setline(1, 'aa ab x')
    1s/\(\(a[a-d] \)*\)\(x\)/-\1- -\2- -\3-/
    call assert_equal('-aa ab - -ab - -x-', getline(1))

    call assert_equal('-aa ab - -ab - -x-', substitute('aa ab x', '\(\(a[a-d] \)*\)\(x\)', '-\1- -\2- -\3-', ''))
  endfor
  bwipe!
  set re=0
endfunc

func Test_eow_with_optional()
  let expected = ['abc def', 'abc', 'def', '', '', '', '', '', '', '']
  for re in range(0, 2)
    exe 'set re=' . re
    let actual = matchlist('abc def', '\(abc\>\)\?\s*\(def\)')
    call assert_equal(expected, actual)
  endfor
endfunc

func Test_reversed_range()
  for re in range(0, 2)
    exe 'set re=' . re
    call assert_fails('call match("abc def", "[c-a]")', 'E944:')
  endfor
  set re=0
endfunc

func Test_large_class()
  set re=1
  call assert_fails('call match("abc def", "[\u3000-\u4000]")', 'E945:')
  set re=2
  call assert_equal(0, 'abc def' =~# '[\u3000-\u4000]')
  call assert_equal(1, "\u3042" =~# '[\u3000-\u4000]')
  set re=0
endfunc

func Test_optmatch_toolong()
  set re=1
  " Can only handle about 8000 characters.
  let pat = '\\%[' .. repeat('x', 9000) .. ']'
  call assert_fails('call match("abc def", "' .. pat .. '")', 'E339:')
  set re=0
endfunc

" Test for regexp patterns with multi-byte support, using utf-8.
func Test_multibyte_chars()
  " tl is a List of Lists with:
  "    2: test auto/old/new  0: test auto/old  1: test auto/new
  "    regexp pattern
  "    text to test the pattern on
  "    expected match (optional)
  "    expected submatch 1 (optional)
  "    expected submatch 2 (optional)
  "    etc.
  "  When there is no match use only the first two items.
  let tl = []

  " Multi-byte character tests. These will fail unless vim is compiled
  " with Multibyte (FEAT_MBYTE) or BIG/HUGE features.
  call add(tl, [2, '[[:alpha:][=a=]]\+', '879 aiaãâaiuvna ', 'aiaãâaiuvna'])
  call add(tl, [2, '[[=a=]]\+', 'ddaãâbcd', 'aãâ'])								" equivalence classes
  call add(tl, [2, '[^ม ]\+', 'มม oijasoifjos ifjoisj f osij j มมมมม abcd', 'oijasoifjos'])
  call add(tl, [2, ' [^ ]\+', 'start มabcdม ', ' มabcdม'])
  call add(tl, [2, '[ม[:alpha:][=a=]]\+', '879 aiaãมâมaiuvna ', 'aiaãมâมaiuvna'])

  " this is not a normal "i" but 0xec
  call add(tl, [2, '\p\+', 'ìa', 'ìa'])
  call add(tl, [2, '\p*', 'aあ', 'aあ'])

  " Test recognition of some character classes
  call add(tl, [2, '\i\+', '&*¨xx ', 'xx'])
  call add(tl, [2, '\f\+', '&*fname ', 'fname'])

  " Test composing character matching
  call add(tl, [2, '.ม', 'xม่x yมy', 'yม'])
  call add(tl, [2, '.ม่', 'xม่x yมy', 'xม่'])
  call add(tl, [2, "\u05b9", " x\u05b9 ", "x\u05b9"])
  call add(tl, [2, ".\u05b9", " x\u05b9 ", "x\u05b9"])
  call add(tl, [2, "\u05b9\u05bb", " x\u05b9\u05bb ", "x\u05b9\u05bb"])
  call add(tl, [2, ".\u05b9\u05bb", " x\u05b9\u05bb ", "x\u05b9\u05bb"])
  call add(tl, [2, "\u05bb\u05b9", " x\u05b9\u05bb ", "x\u05b9\u05bb"])
  call add(tl, [2, ".\u05bb\u05b9", " x\u05b9\u05bb ", "x\u05b9\u05bb"])
  call add(tl, [2, "\u05b9", " y\u05bb x\u05b9 ", "x\u05b9"])
  call add(tl, [2, ".\u05b9", " y\u05bb x\u05b9 ", "x\u05b9"])
  call add(tl, [2, "\u05b9", " y\u05bb\u05b9 x\u05b9 ", "y\u05bb\u05b9"])
  call add(tl, [2, ".\u05b9", " y\u05bb\u05b9 x\u05b9 ", "y\u05bb\u05b9"])
  call add(tl, [1, "\u05b9\u05bb", " y\u05b9 x\u05b9\u05bb ", "x\u05b9\u05bb"])
  call add(tl, [2, ".\u05b9\u05bb", " y\u05bb x\u05b9\u05bb ", "x\u05b9\u05bb"])
  call add(tl, [2, "a", "ca\u0300t"])
  call add(tl, [2, "ca", "ca\u0300t"])
  call add(tl, [2, "a\u0300", "ca\u0300t", "a\u0300"])
  call add(tl, [2, 'a\%C', "ca\u0300t", "a\u0300"])
  call add(tl, [2, 'ca\%C', "ca\u0300t", "ca\u0300"])
  call add(tl, [2, 'ca\%Ct', "ca\u0300t", "ca\u0300t"])

  " Test \Z
  call add(tl, [2, 'ú\Z', 'x'])
  call add(tl, [2, 'יהוה\Z', 'יהוה', 'יהוה'])
  call add(tl, [2, 'יְהוָה\Z', 'יהוה', 'יהוה'])
  call add(tl, [2, 'יהוה\Z', 'יְהוָה', 'יְהוָה'])
  call add(tl, [2, 'יְהוָה\Z', 'יְהוָה', 'יְהוָה'])
  call add(tl, [2, 'יְ\Z', 'וְיַ', 'יַ'])
  call add(tl, [2, "ק\u200d\u05b9x\\Z", "xק\u200d\u05b9xy", "ק\u200d\u05b9x"])
  call add(tl, [2, "ק\u200d\u05b9x\\Z", "xק\u200dxy", "ק\u200dx"])
  call add(tl, [2, "ק\u200dx\\Z", "xק\u200d\u05b9xy", "ק\u200d\u05b9x"])
  call add(tl, [2, "ק\u200dx\\Z", "xק\u200dxy", "ק\u200dx"])
  call add(tl, [2, "\u05b9\\Z", "xyz"])
  call add(tl, [2, "\\Z\u05b9", "xyz"])
  call add(tl, [2, "\u05b9\\Z", "xy\u05b9z", "y\u05b9"])
  call add(tl, [2, "\\Z\u05b9", "xy\u05b9z", "y\u05b9"])
  call add(tl, [1, "\u05b9\\+\\Z", "xy\u05b9z\u05b9 ", "y\u05b9z\u05b9"])
  call add(tl, [1, "\\Z\u05b9\\+", "xy\u05b9z\u05b9 ", "y\u05b9z\u05b9"])

  " Combining different tests and features
  call add(tl, [2, '[^[=a=]]\+', 'ddaãâbcd', 'dd'])

  " Run the tests
  for t in tl
    let re = t[0]
    let pat = t[1]
    let text = t[2]
    let matchidx = 3
    for engine in [0, 1, 2]
      if engine == 2 && re == 0 || engine == 1 && re == 1
        continue
      endif
      let &regexpengine = engine
      try
        let l = matchlist(text, pat)
      catch
        call assert_report('Error ' . engine . ': pat: \"' . pat .
		    \ '\", text: \"' . text .
		    \ '\", caused an exception: \"' . v:exception . '\"')
      endtry
      " check the match itself
      if len(l) == 0 && len(t) > matchidx
        call assert_report('Error ' . engine . ': pat: \"' . pat .
		    \ '\", text: \"' . text .
		    \ '\", did not match, expected: \"' . t[matchidx] . '\"')
      elseif len(l) > 0 && len(t) == matchidx
        call assert_report('Error ' . engine . ': pat: \"' . pat .
		    \ '\", text: \"' . text . '\", match: \"' . l[0] .
		    \ '\", expected no match')
      elseif len(t) > matchidx && l[0] != t[matchidx]
        call assert_report('Error ' . engine . ': pat: \"' . pat .
		    \ '\", text: \"' . text . '\", match: \"' . l[0] .
		    \ '\", expected: \"' . t[matchidx] . '\"')
      else
        " Test passed
      endif
      if len(l) > 0
        " check all the nine submatches
        for i in range(1, 9)
          if len(t) <= matchidx + i
            let e = ''
          else
            let e = t[matchidx + i]
          endif
          if l[i] != e
            call assert_report('Error ' . engine . ': pat: \"' . pat .
                  \ '\", text: \"' . text . '\", submatch ' . i .
                  \ ': \"' . l[i] . '\", expected: \"' . e . '\"')
          endif
        endfor
        unlet i
      endif
    endfor
  endfor
  set regexpengine&
endfunc

" check that 'ambiwidth' does not change the meaning of \p
func Test_ambiwidth()
  set regexpengine=1 ambiwidth=single
  call assert_equal(0, match("\u00EC", '\p'))
  set regexpengine=1 ambiwidth=double
  call assert_equal(0, match("\u00EC", '\p'))
  set regexpengine=2 ambiwidth=single
  call assert_equal(0, match("\u00EC", '\p'))
  set regexpengine=2 ambiwidth=double
  call assert_equal(0, match("\u00EC", '\p'))
  set regexpengine& ambiwidth&
endfunc

func Run_regexp_ignore_case()
  call assert_equal('iIİ', substitute('iIİ', '\([iIİ]\)', '\1', 'g'))

  call assert_equal('iIx', substitute('iIİ', '\c\([İ]\)', 'x', 'g'))
  call assert_equal('xxİ', substitute('iIİ', '\(i\c\)', 'x', 'g'))
  call assert_equal('iIx', substitute('iIİ', '\(İ\c\)', 'x', 'g'))
  call assert_equal('iIx', substitute('iIİ', '\c\(\%u0130\)', 'x', 'g'))
  call assert_equal('iIx', substitute('iIİ', '\c\([\u0130]\)', 'x', 'g'))
  call assert_equal('iIx', substitute('iIİ', '\c\([\u012f-\u0131]\)', 'x', 'g'))
endfunc

func Test_regexp_ignore_case()
  set regexpengine=1
  call Run_regexp_ignore_case()
  set regexpengine=2
  call Run_regexp_ignore_case()
  set regexpengine&
endfunc

" Tests for regexp with multi-byte encoding and various magic settings
func Run_regexp_multibyte_magic()
  let text =<< trim END
    1 a aa abb abbccc
    2 d dd dee deefff
    3 g gg ghh ghhiii
    4 j jj jkk jkklll
    5 m mm mnn mnnooo
    6 x ^aa$ x
    7 (a)(b) abbaa
    8 axx [ab]xx
    9 หม่x อมx
    a อมx หม่x
    b ちカヨは
    c x ¬€x
    d 天使x
    e ������y
    f ������z
    g a啷bb
    j 0123❤x
    k combinations
    l äö üᾱ̆́
  END

  new
  call setline(1, text)
  exe 'normal /a*b\{2}c\+/e' .. "\<CR>x"
  call assert_equal('1 a aa abb abbcc', getline('.'))
  exe 'normal /\Md\*e\{2}f\+/e' .. "\<CR>x"
  call assert_equal('2 d dd dee deeff', getline('.'))
  set nomagic
  exe 'normal /g\*h\{2}i\+/e' .. "\<CR>x"
  call assert_equal('3 g gg ghh ghhii', getline('.'))
  exe 'normal /\mj*k\{2}l\+/e' .. "\<CR>x"
  call assert_equal('4 j jj jkk jkkll', getline('.'))
  exe 'normal /\vm*n{2}o+/e' .. "\<CR>x"
  call assert_equal('5 m mm mnn mnnoo', getline('.'))
  exe 'normal /\V^aa$/' .. "\<CR>x"
  call assert_equal('6 x aa$ x', getline('.'))
  set magic
  exe 'normal /\v(a)(b)\2\1\1/e' .. "\<CR>x"
  call assert_equal('7 (a)(b) abba', getline('.'))
  exe 'normal /\V[ab]\(\[xy]\)\1' .. "\<CR>x"
  call assert_equal('8 axx ab]xx', getline('.'))

  " search for multi-byte without composing char
  exe 'normal /ม' .. "\<CR>x"
  call assert_equal('9 หม่x อx', getline('.'))

  " search for multi-byte with composing char
  exe 'normal /ม่' .. "\<CR>x"
  call assert_equal('a อมx หx', getline('.'))

  " find word by change of word class
  exe 'normal /ち\<カヨ\>は' .. "\<CR>x"
  call assert_equal('b カヨは', getline('.'))

  " Test \%u, [\u] and friends
  " c
  exe 'normal /\%u20ac' .. "\<CR>x"
  call assert_equal('c x ¬x', getline('.'))
  " d
  exe 'normal /[\u4f7f\u5929]\+' .. "\<CR>x"
  call assert_equal('d 使x', getline('.'))
  " e
  exe 'normal /\%U12345678' .. "\<CR>x"
  call assert_equal('e y', getline('.'))
  " f
  exe 'normal /[\U1234abcd\u1234\uabcd]' .. "\<CR>x"
  call assert_equal('f z', getline('.'))
  " g
  exe 'normal /\%d21879b' .. "\<CR>x"
  call assert_equal('g abb', getline('.'))

  " j Test backwards search from a multi-byte char
  exe "normal /x\<CR>x?.\<CR>x"
  call assert_equal('j 012❤', getline('.'))
  " k
  let @w=':%s#comb[i]nations#œ̄ṣ́m̥̄ᾱ̆́#g'
  @w
  call assert_equal('k œ̄ṣ́m̥̄ᾱ̆́', getline(18))

  close!
endfunc

func Test_regexp_multibyte_magic()
  set regexpengine=1
  call Run_regexp_multibyte_magic()
  set regexpengine=2
  call Run_regexp_multibyte_magic()
  set regexpengine&
endfunc

" Test for 7.3.192
" command ":s/ \?/ /g" splits multi-byte characters into bytes
func Test_split_multibyte_to_bytes()
  new
  call setline(1, 'l äö üᾱ̆́')
  s/ \?/ /g
  call assert_equal(' l ä ö ü ᾱ̆́', getline(1))
  close!
endfunc

" Test for matchstr() with multibyte characters
func Test_matchstr_multibyte()
  new
  call assert_equal('ב', matchstr("אבגד", ".", 0, 2))
  call assert_equal('בג', matchstr("אבגד", "..", 0, 2))
  call assert_equal('א', matchstr("אבגד", ".", 0, 0))
  call assert_equal('ג', matchstr("אבגד", ".", 4, -1))
  close!
endfunc

" Test for 7.4.636
" A search with end offset gets stuck at end of file.
func Test_search_with_end_offset()
  new
  call setline(1, ['', 'dog(a', 'cat('])
  exe "normal /(/e+" .. "\<CR>"
  normal "ayn
  call assert_equal("a\ncat(", @a)
  close!
endfunc

" Check that "^" matches even when the line starts with a combining char
func Test_match_start_of_line_combining()
  new
  call setline(1, ['', "\u05ae", ''])
  exe "normal gg/^\<CR>"
  call assert_equal(2, getcurpos()[1])
  bwipe!
endfunc

" Check that [[:upper:]] matches for automatic engine
func Test_match_char_class_upper()
  new
  let _engine=&regexpengine

  " Test 1: [[:upper:]]\{2,\}
  set regexpengine=0
  call setline(1, ['05. ПЕСНЯ О ГЕРОЯХ муз. А. Давиденко, М. Коваля и Б. Шехтера ...', '05. PJESNJA O GJEROJAKH mus. A. Davidjenko, M. Kovalja i B. Shjekhtjera ...'])
  call cursor(1,1)
  let search_cmd='norm /\<[[:upper:]]\{2,\}\>' .. "\<CR>"
  exe search_cmd
  call assert_equal(4, searchcount().total, 'TEST 1')
  set regexpengine=1
  exe search_cmd
  call assert_equal(2, searchcount().total, 'TEST 1')
  set regexpengine=2
  exe search_cmd
  call assert_equal(4, searchcount().total, 'TEST 1')

  " Test 2: [[:upper:]].\+
  let search_cmd='norm /\<[[:upper:]].\+\>' .. "\<CR>"
  set regexpengine=0
  exe search_cmd
  call assert_equal(2, searchcount().total, 'TEST 2')
  set regexpengine=1
  exe search_cmd
  call assert_equal(1, searchcount().total, 'TEST 2')
  set regexpengine=2
  exe search_cmd
  call assert_equal(2, searchcount().total, 'TEST 2')

  " Test 3: [[:lower:]]\+
  let search_cmd='norm /\<[[:lower:]]\+\>' .. "\<CR>"
  set regexpengine=0
  exe search_cmd
  call assert_equal(4, searchcount().total, 'TEST 3 lower')
  set regexpengine=1
  exe search_cmd
  call assert_equal(2, searchcount().total, 'TEST 3 lower')
  set regexpengine=2
  exe search_cmd
  call assert_equal(4, searchcount().total, 'TEST 3 lower')

  " clean up
  let &regexpengine=_engine
  bwipe!
endfunc

" vim: shiftwidth=2 sts=2 expandtab
