Test for regexp patterns with multi-byte support, using utf-8.
See test64 for the non-multi-byte tests.

A pattern that gives the expected result produces OK, so that we know it was
actually tried.

STARTTEST
:so small.vim
:so mbyte.vim
:set nocp encoding=utf-8 viminfo+=nviminfo nomore
:" 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\+', '&*Ÿfname ', '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
:      $put ='ERROR ' . engine . ': pat: \"' . pat . '\", text: \"' . text . '\", caused an exception: \"' . v:exception . '\"'
:    endtry
:" check the match itself
:    if len(l) == 0 && len(t) > matchidx
:      $put ='ERROR ' . engine . ': pat: \"' . pat . '\", text: \"' . text . '\", did not match, expected: \"' . t[matchidx] . '\"'
:    elseif len(l) > 0 && len(t) == matchidx
:      $put ='ERROR ' . engine . ': pat: \"' . pat . '\", text: \"' . text . '\", match: \"' . l[0] . '\", expected no match'
:    elseif len(t) > matchidx && l[0] != t[matchidx]
:      $put ='ERROR ' . engine . ': pat: \"' . pat . '\", text: \"' . text . '\", match: \"' . l[0] . '\", expected: \"' . t[matchidx] . '\"'
:    else
:      $put ='OK ' . engine . ' - ' . pat
:    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
:          $put ='ERROR ' . engine . ': pat: \"' . pat . '\", text: \"' . text . '\", submatch ' . i . ': \"' . l[i] . '\", expected: \"' . e . '\"'
:        endif
:      endfor
:      unlet i
:    endif
:  endfor
:endfor
:unlet t tl e l
:
:" check that 'ambiwidth' does not change the meaning of \p
:set regexpengine=1 ambiwidth=single
:$put ='eng 1 ambi single: ' . match(\"\u00EC\", '\p')
:set regexpengine=1 ambiwidth=double
:$put ='eng 1 ambi double: ' . match(\"\u00EC\", '\p')
:set regexpengine=2 ambiwidth=single
:$put ='eng 2 ambi single: ' . match(\"\u00EC\", '\p')
:set regexpengine=2 ambiwidth=double
:$put ='eng 2 ambi double: ' . match(\"\u00EC\", '\p')
:
:/\%#=1^Results/,$wq! test.out
ENDTEST

Results of test95: