neovim/src/nvim/testdir/test_regexp_latin.vim

" Tests for regexp in latin1 encoding
set encoding=latin1
scriptencoding latin1

func s:equivalence_test()
  let str = "A<><41><EFBFBD><EFBFBD><EFBFBD><EFBFBD> B C D E<><45><EFBFBD><EFBFBD> F G H I<><49><EFBFBD><EFBFBD> J K L M N<> O<><4F><EFBFBD><EFBFBD><EFBFBD><EFBFBD> P Q R S T U<><55><EFBFBD><EFBFBD> V W X Y<> Z a<><61><EFBFBD><EFBFBD><EFBFBD><EFBFBD> b c d e<><65><EFBFBD><EFBFBD> f g h i<><69><EFBFBD><EFBFBD> j k l m n<> o<><6F><EFBFBD><EFBFBD><EFBFBD><EFBFBD> p q r s t u<><75><EFBFBD><EFBFBD> v w x y<><79> z"
  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
	    " a 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()
endfunc

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

func Test_range_with_newline()
  new
  call setline(1, "a")
  call assert_equal(0, search("[ -*\\n- ]"))
  call assert_equal(0, search("[ -*\\t-\\n]"))
  bwipe!
endfunc