# Copyright 2015 Koichi Murase <myoga.murase@gmail.com>. All rights reserved.
# This script is a part of blesh (https://github.com/akinomyoga/ble.sh)
# provided under the BSD-3-Clause license.  Do not edit this file because this
# is not the original source code: Various pre-processing has been applied.
# Also, the code comments and blank lines are stripped off in the installation
# process.  Please find the corresponding source file(s) in the repository
# "akinomyoga/ble.sh".
#
# Source: /lib/test-canvas.sh
ble-import lib/core-test
_ble_test_canvas_contra=
if [[ -x ext/contra ]]; then
  _ble_test_canvas_contra=ext/contra
elif [[ $(printf 'hello world' | contra test 5 2 2>/dev/null) == $' worl\nd    ' ]]; then
  _ble_test_canvas_contra=contra
fi
function ble/test:canvas/trace.contra {
  [[ $_ble_test_canvas_contra ]] || return 0 # skip
  local w=${1%%:*} h=${1#*:} esc=$2 opts=$3 test_opts=$4
  local expect=$(sed 's/\$$//')
  local ret x=0 y=0 g=0 rex termw=$w termh=$h
  rex=':x=([^:]+):'; [[ :$test_opts: =~ $rex ]] && ((x=BASH_REMATCH[1]))
  rex=':y=([^:]+):'; [[ :$test_opts: =~ $rex ]] && ((y=BASH_REMATCH[1]))
  rex=':termw=([^:]+):'; [[ :$test_opts: =~ $rex ]] && ((termw=BASH_REMATCH[1]))
  rex=':termh=([^:]+):'; [[ :$test_opts: =~ $rex ]] && ((termh=BASH_REMATCH[1]))
  local x0=$x y0=$y
  LINES=$h COLUMNS=$w ble/canvas/trace "$esc" "$opts"
  local out=$ret
  ble/string#quote-word "$esc"; local q_esc=$ret
  ble/string#quote-word "$opts"; local q_opts=$ret
  ble/test --depth=1 --display-code="trace $q_esc $q_opts" \
           '{ printf "\e['$((y0+1))';'$((x0+1))'H"; ble/util/put "$out";} | "$_ble_test_canvas_contra" test "$termw" "$termh"' \
           stdout="$expect"
}
ble/test/start-section 'ble/canvas/trace (relative:confine:measure-bbox)' 17
ble/test:canvas/trace.contra 10:10 'hello world this is a flow world' relative x=3:y=3:termw=20 << EOF
                    $
                    $
                    $
   hello w          $
orld this           $
is a flow           $
world               $
                    $
                    $
                    $
EOF
ble/test:canvas/trace.contra 20:1 '12345678901234567890hello' confine << EOF
12345678901234567890$
EOF
ble/test:canvas/trace.contra 10:1 $'hello\nworld' confine << EOF
helloworld$
EOF
ble/test:canvas/trace.contra 10:2 $'hello\nworld check' confine << EOF
hello     $
world chec$
EOF
ble/test:canvas/trace.contra 10:6 $'hello\e[B\e[4D123' measure-bbox x=3:y=2 << EOF
          $
          $
   hello  $
    123   $
          $
          $
EOF
[[ $_ble_test_canvas_contra ]] &&
  ble/test 'echo "$x1-$x2:$y1-$y2"' stdout='3-8:2-4'
ble/test:canvas/trace.contra 10:2 日本語 measure-bbox << EOF
日本語    $
          $
EOF
[[ $_ble_test_canvas_contra ]] &&
  ble/test 'echo "$x1-$x2:$y1-$y2"' stdout='0-6:0-1'
ble/test:canvas/trace.contra 10:2 $'hello\eDworld' measure-bbox << EOF
hello     $
     world$
EOF
[[ $_ble_test_canvas_contra ]] &&
  ble/test 'echo "$x1-$x2:$y1-$y2"' stdout='0-10:0-2'
ble/test:canvas/trace.contra 10:2 $'hello\eMworld' measure-bbox << EOF
     world$
hello     $
EOF
[[ $_ble_test_canvas_contra ]] &&
  ble/test 'echo "$x1-$x2:$y1-$y2"' stdout='0-10:-1-1'
(
  LINES=10 COLUMNS=10 _ble_term_xenl=1
  ble/test 'x=0 y=0; ble/canvas/trace "HelloWorld"; ret=$x,$y' ret=10,0
  ble/test 'x=0 y=0; ble/canvas/trace "HelloWorldH"; ret=$x,$y' ret=1,1
  ble/test 'x=0 y=0; ble/canvas/trace "HelloWorldHello"; ret=$x,$y' ret=5,1
  ble/test 'x=0 y=0; ble/canvas/trace "HelloWorldHelloWorldHello"; ret=$x,$y' ret=5,2
  ble/test 'x=0 y=0; ble/canvas/trace "HelloWorldHelloWorldHelloWorldHello"; ret=$x,$y' ret=5,3
)
ble/test/start-section 'ble/canvas/trace (cfuncs)' 18
function ble/test:canvas/check-trace-1 {
  local input=$1 ex=$2 ey=$3
  ble/canvas/trace.draw "$input"
  ble/test --depth=1 '((x==ex&&y==ey))'
}
function ble/test:canvas/check-trace {
  local -a DRAW_BUFF=()
  ble/canvas/put.draw "$_ble_term_clear"
  local x=0 y=0
  ble/test:canvas/check-trace-1 "abc" 3 0
  ble/test:canvas/check-trace-1 $'\n\n\nn' 1 3
  ble/test:canvas/check-trace-1 $'\e[3BB' 2 6
  ble/test:canvas/check-trace-1 $'\e[2AA' 3 4
  ble/test:canvas/check-trace-1 $'\e[20CC' 24 4
  ble/test:canvas/check-trace-1 $'\e[8DD' 17 4
  ble/test:canvas/check-trace-1 $'\e[9EE' 1 13
  ble/test:canvas/check-trace-1 $'\e[6FF' 1 7
  ble/test:canvas/check-trace-1 $'\e[28GG' 28 7
  ble/test:canvas/check-trace-1 $'\e[II' 33 7
  ble/test:canvas/check-trace-1 $'\e[3ZZ' 17 7
  ble/test:canvas/check-trace-1 $'\eDD' 18 8
  ble/test:canvas/check-trace-1 $'\eMM' 19 7
  ble/test:canvas/check-trace-1 $'\e77\e[3;3Hexcur\e8\e[C8' 21 7
  ble/test:canvas/check-trace-1 $'\eEE' 1 8
  ble/test:canvas/check-trace-1 $'\e[10;24HH' 24 9
  ble/test:canvas/check-trace-1 $'\e[1;94mb\e[m' 25 9
  local expect=$(sed 's/\$$//' << EOF
abc                                     $
                                        $
  excur                                 $
n                                       $
  A             D      C                $
                                        $
 B                                      $
F               Z M78      G    I       $
E                D                      $
                       Hb               $
                                        $
                                        $
                                        $
E                                       $
                                        $
EOF
)
  [[ $_ble_test_canvas_contra ]] &&
    ble/test --depth=1 \
             'ble/canvas/flush.draw | $_ble_test_canvas_contra test 40 15' \
             stdout="$expect"
}
ble/test:canvas/check-trace
ble/test/start-section 'ble/canvas/trace (justify)' 30
ble/test:canvas/trace.contra 30:1 'a b c' justify << EOF
a             b              c$
EOF
ble/test:canvas/trace.contra 30:1 ' center ' justify << EOF
            center            $
EOF
ble/test:canvas/trace.contra 30:1 ' right-aligned' justify << EOF
                 right-aligned$
EOF
ble/test:canvas/trace.contra 30:1 'left-aligned' justify << EOF
left-aligned                  $
EOF
ble/test:canvas/trace.contra 30:1 ' 日本語' justify << EOF
                        日本語$
EOF
ble/test:canvas/trace.contra 30:1 'a b c d e f' justify << EOF
a    b     c     d     e     f$
EOF
ble/test:canvas/trace.contra 30:2 $'hello center world\na b c d e f' justify << EOF
hello       center       world$
a    b     c     d     e     f$
EOF
ble/test:canvas/trace.contra 30:3 'A brown fox jumped over the lazy dog. A brown fox jumped over the lazy dog.' justify << EOF
A brown fox jumped over the la$
zy dog. A brown fox jumped ove$
r      the      lazy      dog.$
EOF
ble/test:canvas/trace.contra 30:2 $'hello blesh world\rHELLO WORLD\nhello world HELLO BLESH WORLD' justify=$' \r' << EOF
hello blesh  worldHELLO  WORLD$
hello world HELLO BLESH  WORLD$
EOF
COLUMNS=10 LINES=10 x=3 y=2 ble/canvas/trace $'a b c\n' justify:measure-bbox
ble/test 'echo "$x1,$y1:$x2,$y2"' stdout:'0,2:10,4'
COLUMNS=10 LINES=10 x=3 y=2 ble/canvas/trace $' hello ' justify:measure-bbox
ble/test 'echo "$x1,$y1:$x2,$y2"' stdout:'2,2:7,3'
ble/test:canvas/trace.contra 30:1 $'\e[3Dhello\rblesh\rworld\e[1D' justify=$'\r' x=5 << EOF
hello      blesh         world$
EOF
ble/test:canvas/trace.contra \
  30:5 $'hello world\nfoo bar buzz\nA quick brown fox\nLorem ipsum\n1 1 2 3 5 8 13 21 34 55 89 144' \
  justify:clip=2,1+24,5 << EOF
o          bar                $
    quick     brown           $
rem                    i      $
1 2 3 5 8 13 21 34 55 89      $
                              $
EOF
ble/test:canvas/trace.contra 30:1 $'hello1 world long long word quick brown' justify:confine << EOF
hello1 world long long word qu$
EOF
ble/test:canvas/trace.contra 30:1 $'hello2 world long long word quick brown' justify:truncate << EOF
hello2 world long long word qu$
EOF
ble/test:canvas/trace.contra 60:2 $'-- INSERT --\r/home/murase\r2021-01-01 00:00:00' justify << EOF
--           INSERT           2021-01-01            00:00:00$
                                                            $
EOF
ble/test:canvas/trace.contra 30:3 $'hello\r\vquick check\v\rtest \e[2Afoo\r\vbar' justify:truncate << EOF
hello                      foo$
quick         check        bar$
              test            $
EOF
ble/test:canvas/trace.contra 30:3 $'hello\n2021-01-01\nA' right:measure-bbox:measure-gbox << EOF
                         hello$
                    2021-01-01$
                             A$
EOF
if [[ $_ble_test_canvas_contra ]]; then
  ble/test 'echo "bbox:$x1,$y1-$x2,$y2"' stdout='bbox:0,0-30,3'
  ble/test 'echo "gbox:$gx1,$gy1-$gx2,$gy2"' stdout='gbox:20,0-30,3'
fi
ble/test:canvas/trace.contra 30:3 $'hello\n2021-01-01\nA' center:measure-bbox:measure-gbox << EOF
            hello             $
          2021-01-01          $
              A               $
EOF
if [[ $_ble_test_canvas_contra ]]; then
  ble/test 'echo "bbox:$x1,$y1-$x2,$y2"' stdout='bbox:0,0-20,3'
  ble/test 'echo "gbox:$gx1,$gy1-$gx2,$gy2"' stdout='gbox:10,0-20,3'
fi
ble/test:canvas/trace.contra 10:1 $'xyz\e[4Daxyz' relative:measure-bbox x=3 << EOF
  axyz    $
EOF
if [[ $_ble_test_canvas_contra ]]; then
  ble/test 'echo "bbox:$x1,$y1-$x2,$y2"' stdout='bbox:2,0-6,1'
fi
ble/test:canvas/trace.contra 30:3 $'\n2022-11-28' right:measure-bbox:measure-gbox << EOF
                              $
                    2022-11-28$
                              $
EOF
if [[ $_ble_test_canvas_contra ]]; then
  ble/test 'echo "bbox:$x1,$y1-$x2,$y2"' stdout='bbox:0,0-30,2'
  ble/test 'echo "gbox:$gx1,$gy1-$gx2,$gy2"' stdout='gbox:20,1-30,2'
fi
ble/test:canvas/trace.contra 30:3 $'\n\n2022-11-28' right:measure-bbox:measure-gbox << EOF
                              $
                              $
                    2022-11-28$
EOF
if [[ $_ble_test_canvas_contra ]]; then
  ble/test 'echo "bbox:$x1,$y1-$x2,$y2"' stdout='bbox:0,0-30,3'
  ble/test 'echo "gbox:$gx1,$gy1-$gx2,$gy2"' stdout='gbox:20,2-30,3'
fi
ble/test/start-section 'ble/canvas/trace-text' 11
(
  sgr0= sgr1=
  lines=1 cols=10 _ble_term_xenl=1 x=0 y=0
  ble/test 'ble/canvas/trace-text "Hello World";ret="$x,$y,$ret"' ret='10,0,Hello Worl'
  lines=1 cols=10 _ble_term_xenl= x=0 y=0
  ble/test 'ble/canvas/trace-text "Hello World";ret="$x,$y,$ret"' ret='9,0,Hello Wor'
  lines=1 cols=10 _ble_term_xenl=1 x=3 y=0
  ble/test 'ble/canvas/trace-text "Hello World";ret="$x,$y,$ret"' ret='10,0,Hello W'
  lines=3 cols=10 _ble_term_xenl=1 x=3 y=0
  ble/test 'ble/canvas/trace-text "Hello Bash World";ret="$x,$y,$ret"' ret='9,1,Hello Bash World'
  lines=3 cols=10 _ble_term_xenl=1 x=3 y=0
  ble/test 'ble/canvas/trace-text "これは日本語の文章";ret="$x,$y,$ret"' ret=$'2,2,これは\n日本語の文章'
  lines=3 cols=10 _ble_term_xenl=1 x=3 y=0
  ble/test 'ble/canvas/trace-text "これは日本語の文章" nonewline;ret="$x,$y,$ret"' ret='2,2,これは 日本語の文章'
  lines=3 cols=10 _ble_term_xenl=1 x=0 y=0
  ble/test 'ble/canvas/trace-text "これは日本";ret="$x,$y,$ret"' ret=$'0,1,これは日本\n'
  lines=3 cols=10 _ble_term_xenl=0 x=0 y=0
  ble/test 'ble/canvas/trace-text "これは日本";ret="$x,$y,$ret"' ret=$'0,1,これは日本'
  lines=3 cols=10 _ble_term_xenl=1 x=0 y=0
  ble/test 'ble/canvas/trace-text "これは日本" nonewline;ret="$x,$y,$ret"' ret=$'10,0,これは日本'
  lines=3 cols=10 _ble_term_xenl=0 x=0 y=0
  ble/test 'ble/canvas/trace-text "これは日本" nonewline;ret="$x,$y,$ret"' ret=$'0,1,これは日本'
  lines=1 cols=12 _ble_term_xenl=1 x=0 y=0
  ble/test $'ble/canvas/trace-text "あ\nい\nう" external-sgr;ret="$x,$y,$ret"' ret=$'10,0,あ^Jい^Jう'
)
ble/test/end-section
ble/test/start-section 'ble/canvas/textmap' 5
function ble/test:canvas/textmap {
  local text=$1
  x=0 y=0
  _ble_textmap_length=
  _ble_textmap_pos=()
  _ble_textmap_glyph=()
  _ble_textmap_ichg=()
  _ble_textmap_dbeg=0
  _ble_textmap_dend=${#text}
  _ble_textmap_dend0=0
  ble/textmap#update "$text"
  [[ :$opts: == *:stderr:* ]] &&
    declare -p _ble_textmap_pos >&2
}
(
  ble/test:canvas/textmap $'hello\nworld\ncheck'
  ble/test 'ble/textmap#getxy.out 5; ret=$x,$y' ret='5,0'
  ble/test 'ble/textmap#getxy.out 6; ret=$x,$y' ret='0,1'
  ble/test 'ble/textmap#getxy.out 11; ret=$x,$y' ret='5,1'
  ble/test 'ble/textmap#getxy.out 12; ret=$x,$y' ret='0,2'
  ble/test 'ble/textmap#getxy.out 17; ret=$x,$y' ret='5,2'
)
ble/test/start-section 'ble/canvas/GraphemeCluster/c2break' 77
if (LC_ALL=C.UTF-8 builtin eval "s=\$'\\U1F6D1'"; ((${#s}==2))) 2>/dev/null; then
  function ble/test:canvas/GraphemeCluster/.locate-code-point {
    local s=$1 k=$2 len=${#1} i=0 shift
    while ((k-->=1&&i<len)); do
      ble/unicode/GraphemeCluster/s2break-right "$s" "$i" shift
      ((i+=shift))
    done
    ret=$i
  }
else
  function ble/test:canvas/GraphemeCluster/.locate-code-point {
    ret=$2
  }
fi
(
  bleopt grapheme_cluster=extended
  _ble_unicode_GraphemeClusterBreak_custom=()
  bleopt emoji_opts=ri:tpvs:epvs:zwj
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x20))"' ret="$_ble_unicode_GraphemeClusterBreak_Other"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x41))"' ret="$_ble_unicode_GraphemeClusterBreak_Other"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x7E))"' ret="$_ble_unicode_GraphemeClusterBreak_Other"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x00))"' ret="$_ble_unicode_GraphemeClusterBreak_Control"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x0d))"' ret="$_ble_unicode_GraphemeClusterBreak_Control"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x0a))"' ret="$_ble_unicode_GraphemeClusterBreak_Control"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x1F))"' ret="$_ble_unicode_GraphemeClusterBreak_Control"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x80))"' ret="$_ble_unicode_GraphemeClusterBreak_Control"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x9F))"' ret="$_ble_unicode_GraphemeClusterBreak_Control"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x0308))"' ret="$_ble_unicode_GraphemeClusterBreak_InCB_Extend"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x200C))"' ret="$_ble_unicode_GraphemeClusterBreak_Extend" # ZWNJ
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x200D))"' ret="$_ble_unicode_GraphemeClusterBreak_ZWJ"    # ZWJ
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x0600))"' ret="$_ble_unicode_GraphemeClusterBreak_Prepend"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x0605))"' ret="$_ble_unicode_GraphemeClusterBreak_Prepend"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x06DD))"' ret="$_ble_unicode_GraphemeClusterBreak_Prepend"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x110BD))"' ret="$_ble_unicode_GraphemeClusterBreak_Prepend"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xE33))"' ret="$_ble_unicode_GraphemeClusterBreak_SpacingMark" # THAI CHARACTER SARA AM
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xEB3))"' ret="$_ble_unicode_GraphemeClusterBreak_SpacingMark" # LAO VOWEL SIGN AM
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x1100))"' ret="$_ble_unicode_GraphemeClusterBreak_L"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x115F))"' ret="$_ble_unicode_GraphemeClusterBreak_L"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xA960))"' ret="$_ble_unicode_GraphemeClusterBreak_L"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xA97C))"' ret="$_ble_unicode_GraphemeClusterBreak_L"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x1160))"' ret="$_ble_unicode_GraphemeClusterBreak_V"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x11A2))"' ret="$_ble_unicode_GraphemeClusterBreak_V"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xD7B0))"' ret="$_ble_unicode_GraphemeClusterBreak_V"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xD7C6))"' ret="$_ble_unicode_GraphemeClusterBreak_V"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x11A8))"' ret="$_ble_unicode_GraphemeClusterBreak_T"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x11F9))"' ret="$_ble_unicode_GraphemeClusterBreak_T"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xD7CB))"' ret="$_ble_unicode_GraphemeClusterBreak_T"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xD7FB))"' ret="$_ble_unicode_GraphemeClusterBreak_T"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xAC00))"' ret="$_ble_unicode_GraphemeClusterBreak_LV"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xAC1C))"' ret="$_ble_unicode_GraphemeClusterBreak_LV"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xAC38))"' ret="$_ble_unicode_GraphemeClusterBreak_LV"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xAC01))"' ret="$_ble_unicode_GraphemeClusterBreak_LVT"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0xAC04))"' ret="$_ble_unicode_GraphemeClusterBreak_LVT"
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x1F1E6))"' ret="$_ble_unicode_GraphemeClusterBreak_Regional_Indicator" # RI A
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x1F1FF))"' ret="$_ble_unicode_GraphemeClusterBreak_Regional_Indicator" # RI Z
  ble/test 'ble/unicode/GraphemeCluster/c2break "$((0x1F32B))"' ret="$_ble_unicode_GraphemeClusterBreak_Pictographic"
  if ((_ble_bash>=40200)); then
    function ble/test:canvas/GraphemeClusterBreak/find-previous-boundary {
      local str=$1 index=$2 ans=$3 ret=
      ble/test:canvas/GraphemeCluster/.locate-code-point "$str." "$index"; index=$ret
      ble/test:canvas/GraphemeCluster/.locate-code-point "$str" "$ans"; ans=$ret
      ble/test "ble/unicode/GraphemeCluster/find-previous-boundary '$str' $index" ret="$ans"
    }
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'\U1F1E6\U1F1FF\U1F1E6\U1F1FF' 1 0
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'\U1F1E6\U1F1FF\U1F1E6\U1F1FF' 2 0
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'\U1F1E6\U1F1FF\U1F1E6\U1F1FF' 3 2
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'\U1F1E6\U1F1FF\U1F1E6\U1F1FF' 4 2
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'\U1F1E6\U1F1FF\U1F1E6\U1F1FF' 5 4
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'A\U1F1E6\U1F1FF\U1F1E6\U1F1FF\U1F1E6' 2 1
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'B\U1F1E6\U1F1FF\U1F1E6\U1F1FF\U1F1E6' 3 1
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'C\U1F1E6\U1F1FF\U1F1E6\U1F1FF\U1F1E6' 4 3
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'D\U1F1E6\U1F1FF\U1F1E6\U1F1FF\U1F1E6' 5 3
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'E\U1F1E6\U1F1FF\U1F1E6\U1F1FF\U1F1E6' 6 5
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'F\U1F1E6\U1F1FF\U1F1E6\U1F1FF\U1F1E6' 7 6
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'G\U1F1E6\U1F1FF\U1F1E6\U1F1FF\U1F1E6Z' 7 6
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'H\u600\u600\u600\u600\U1F1E6\U1F1FF' 7 1
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'I\u600\u600\u600\u600\U1F1E6\U1F1FF' 6 1
    bleopt_grapheme_cluster=legacy ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'J\u600\u600\u600\u600\U1F1E6\U1F1FF' 7 5
    bleopt_grapheme_cluster=legacy ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'K\u600\u600\u600\u600\U1F1E6\U1F1FF' 6 5
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'\U1F636\U200D\U1F32B\UFE0F' 1 0
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'\U1F636\U200D\U1F32B\UFE0F' 2 0
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'\U1F636\U200D\U1F32B\UFE0F' 3 0
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'\U1F636\U200D\U1F32B\UFE0F' 4 0
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'\U1F636\U200D\U1F32B\UFE0F' 5 4
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'a\U1F636\U200D\U1F32B\UFE0F' 2 1
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'b\U1F636\U200D\U1F32B\UFE0F' 3 1
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'c\U1F636\U200D\U1F32B\UFE0F' 4 1
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'d\U1F636\U200D\U1F32B\UFE0F' 5 1
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'e\U1F636\U200D\U1F32B\UFE0F' 6 5
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'f\U200D\U1F32B\UFE0F' 2 0
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'g\U200D\U1F32B\UFE0F' 3 2
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'h\U200D\U1F32B\UFE0F' 4 2
    ble/test:canvas/GraphemeClusterBreak/find-previous-boundary $'i\U200D\U1F32B\UFE0F' 5 4
    ble/test "ble/test:canvas/textmap \$'@@'                   stderr; ble/textmap#get-index-at -v ret 1 0" ret=1
    ble/test "ble/test:canvas/textmap \$'@\u0308@'             stderr; ble/textmap#get-index-at -v ret 1 0" ret=2
    ble/test "ble/test:canvas/textmap \$'@\u0308\u0308@'       stderr; ble/textmap#get-index-at -v ret 1 0" ret=3
    ble/test "ble/test:canvas/textmap \$'@\u0308\u0308\u0308@' stderr; ble/textmap#get-index-at -v ret 1 0" ret=4
    ble/test 'ble/util/is-unicode-output'
    c1=$'\uFE0F'
    ble/test code:'code=; ble/unicode/GraphemeCluster/s2break-right "$c1" 0 code; ret=$code' ret="$((0xFE0F))"
    ble/test code:'code=; ble/unicode/GraphemeCluster/s2break-left "$c1" "${#c1}" code; ret=$code' ret="$((0xFE0F))"
    c2=$'\U1F6D1'
    ble/test code:'code=; ble/unicode/GraphemeCluster/s2break-right "$c2" 0 code; ret=$code' ret="$((0x1F6D1))"
    ble/test code:'code=; ble/unicode/GraphemeCluster/s2break-left "$c2" "${#c2}" code; ret=$code' ret="$((0x1F6D1))"
  fi
)
ble/test/start-section 'ble/canvas/GraphemeCluster/c2break (GraphemeBreakTest.txt)' 6244
(
  bleopt grapheme_cluster=extended
  _ble_unicode_c2w_version=17 # Test cases contain 15.1.0 features
  _ble_unicode_GraphemeClusterBreak_custom=()
  bleopt emoji_opts=ri:tpvs:epvs:zwj
  tests_cases=(
    0,1,2:'\U0020\U0020' 0,0,2,3:'\U0020\U0308\U0020' 0,1,2:'\U0020\U000D' 0,0,2,3:'\U0020\U0308\U000D' 0,1,2:'\U0020\U000A' 0,0,2,3:'\U0020\U0308\U000A'
    0,1,2:'\U0020\U0001' 0,0,2,3:'\U0020\U0308\U0001' 0,0,2:'\U0020\U034F' 0,0,0,3:'\U0020\U0308\U034F' 0,1,2:'\U0020\U1F1E6' 0,0,2,3:'\U0020\U0308\U1F1E6'
    0,1,2:'\U0020\U0600' 0,0,2,3:'\U0020\U0308\U0600' 0,0,2:'\U0020\U0A03' 0,0,0,3:'\U0020\U0308\U0A03' 0,1,2:'\U0020\U1100' 0,0,2,3:'\U0020\U0308\U1100'
    0,1,2:'\U0020\U1160' 0,0,2,3:'\U0020\U0308\U1160' 0,1,2:'\U0020\U11A8' 0,0,2,3:'\U0020\U0308\U11A8' 0,1,2:'\U0020\UAC00' 0,0,2,3:'\U0020\U0308\UAC00'
    0,1,2:'\U0020\UAC01' 0,0,2,3:'\U0020\U0308\UAC01' 0,0,2:'\U0020\U0900' 0,0,0,3:'\U0020\U0308\U0900' 0,0,2:'\U0020\U0903' 0,0,0,3:'\U0020\U0308\U0903'
    0,1,2:'\U0020\U0904' 0,0,2,3:'\U0020\U0308\U0904' 0,1,2:'\U0020\U0D4E' 0,0,2,3:'\U0020\U0308\U0D4E' 0,1,2:'\U0020\U0915' 0,0,2,3:'\U0020\U0308\U0915'
    0,1,2:'\U0020\U231A' 0,0,2,3:'\U0020\U0308\U231A' 0,0,2:'\U0020\U0300' 0,0,0,3:'\U0020\U0308\U0300' 0,0,2:'\U0020\U093C' 0,0,0,3:'\U0020\U0308\U093C'
    0,0,2:'\U0020\U094D' 0,0,0,3:'\U0020\U0308\U094D' 0,0,2:'\U0020\U200D' 0,0,0,3:'\U0020\U0308\U200D' 0,1,2:'\U0020\U0378' 0,0,2,3:'\U0020\U0308\U0378'
    0,1,2:'\U000D\U0020' 0,1,2,3:'\U000D\U0308\U0020' 0,1,2:'\U000D\U000D' 0,1,2,3:'\U000D\U0308\U000D' 0,1,2:'\U000D\U000A' 0,1,2,3:'\U000D\U0308\U000A'
    0,1,2:'\U000D\U0001' 0,1,2,3:'\U000D\U0308\U0001' 0,1,2:'\U000D\U034F' 0,1,1,3:'\U000D\U0308\U034F' 0,1,2:'\U000D\U1F1E6' 0,1,2,3:'\U000D\U0308\U1F1E6'
    0,1,2:'\U000D\U0600' 0,1,2,3:'\U000D\U0308\U0600' 0,1,2:'\U000D\U0A03' 0,1,1,3:'\U000D\U0308\U0A03' 0,1,2:'\U000D\U1100' 0,1,2,3:'\U000D\U0308\U1100'
    0,1,2:'\U000D\U1160' 0,1,2,3:'\U000D\U0308\U1160' 0,1,2:'\U000D\U11A8' 0,1,2,3:'\U000D\U0308\U11A8' 0,1,2:'\U000D\UAC00' 0,1,2,3:'\U000D\U0308\UAC00'
    0,1,2:'\U000D\UAC01' 0,1,2,3:'\U000D\U0308\UAC01' 0,1,2:'\U000D\U0900' 0,1,1,3:'\U000D\U0308\U0900' 0,1,2:'\U000D\U0903' 0,1,1,3:'\U000D\U0308\U0903'
    0,1,2:'\U000D\U0904' 0,1,2,3:'\U000D\U0308\U0904' 0,1,2:'\U000D\U0D4E' 0,1,2,3:'\U000D\U0308\U0D4E' 0,1,2:'\U000D\U0915' 0,1,2,3:'\U000D\U0308\U0915'
    0,1,2:'\U000D\U231A' 0,1,2,3:'\U000D\U0308\U231A' 0,1,2:'\U000D\U0300' 0,1,1,3:'\U000D\U0308\U0300' 0,1,2:'\U000D\U093C' 0,1,1,3:'\U000D\U0308\U093C'
    0,1,2:'\U000D\U094D' 0,1,1,3:'\U000D\U0308\U094D' 0,1,2:'\U000D\U200D' 0,1,1,3:'\U000D\U0308\U200D' 0,1,2:'\U000D\U0378' 0,1,2,3:'\U000D\U0308\U0378'
    0,1,2:'\U000A\U0020' 0,1,2,3:'\U000A\U0308\U0020' 0,1,2:'\U000A\U000D' 0,1,2,3:'\U000A\U0308\U000D' 0,1,2:'\U000A\U000A' 0,1,2,3:'\U000A\U0308\U000A'
    0,1,2:'\U000A\U0001' 0,1,2,3:'\U000A\U0308\U0001' 0,1,2:'\U000A\U034F' 0,1,1,3:'\U000A\U0308\U034F' 0,1,2:'\U000A\U1F1E6' 0,1,2,3:'\U000A\U0308\U1F1E6'
    0,1,2:'\U000A\U0600' 0,1,2,3:'\U000A\U0308\U0600' 0,1,2:'\U000A\U0A03' 0,1,1,3:'\U000A\U0308\U0A03' 0,1,2:'\U000A\U1100' 0,1,2,3:'\U000A\U0308\U1100'
    0,1,2:'\U000A\U1160' 0,1,2,3:'\U000A\U0308\U1160' 0,1,2:'\U000A\U11A8' 0,1,2,3:'\U000A\U0308\U11A8' 0,1,2:'\U000A\UAC00' 0,1,2,3:'\U000A\U0308\UAC00'
    0,1,2:'\U000A\UAC01' 0,1,2,3:'\U000A\U0308\UAC01' 0,1,2:'\U000A\U0900' 0,1,1,3:'\U000A\U0308\U0900' 0,1,2:'\U000A\U0903' 0,1,1,3:'\U000A\U0308\U0903'
    0,1,2:'\U000A\U0904' 0,1,2,3:'\U000A\U0308\U0904' 0,1,2:'\U000A\U0D4E' 0,1,2,3:'\U000A\U0308\U0D4E' 0,1,2:'\U000A\U0915' 0,1,2,3:'\U000A\U0308\U0915'
    0,1,2:'\U000A\U231A' 0,1,2,3:'\U000A\U0308\U231A' 0,1,2:'\U000A\U0300' 0,1,1,3:'\U000A\U0308\U0300' 0,1,2:'\U000A\U093C' 0,1,1,3:'\U000A\U0308\U093C'
    0,1,2:'\U000A\U094D' 0,1,1,3:'\U000A\U0308\U094D' 0,1,2:'\U000A\U200D' 0,1,1,3:'\U000A\U0308\U200D' 0,1,2:'\U000A\U0378' 0,1,2,3:'\U000A\U0308\U0378'
    0,1,2:'\U0001\U0020' 0,1,2,3:'\U0001\U0308\U0020' 0,1,2:'\U0001\U000D' 0,1,2,3:'\U0001\U0308\U000D' 0,1,2:'\U0001\U000A' 0,1,2,3:'\U0001\U0308\U000A'
    0,1,2:'\U0001\U0001' 0,1,2,3:'\U0001\U0308\U0001' 0,1,2:'\U0001\U034F' 0,1,1,3:'\U0001\U0308\U034F' 0,1,2:'\U0001\U1F1E6' 0,1,2,3:'\U0001\U0308\U1F1E6'
    0,1,2:'\U0001\U0600' 0,1,2,3:'\U0001\U0308\U0600' 0,1,2:'\U0001\U0A03' 0,1,1,3:'\U0001\U0308\U0A03' 0,1,2:'\U0001\U1100' 0,1,2,3:'\U0001\U0308\U1100'
    0,1,2:'\U0001\U1160' 0,1,2,3:'\U0001\U0308\U1160' 0,1,2:'\U0001\U11A8' 0,1,2,3:'\U0001\U0308\U11A8' 0,1,2:'\U0001\UAC00' 0,1,2,3:'\U0001\U0308\UAC00'
    0,1,2:'\U0001\UAC01' 0,1,2,3:'\U0001\U0308\UAC01' 0,1,2:'\U0001\U0900' 0,1,1,3:'\U0001\U0308\U0900' 0,1,2:'\U0001\U0903' 0,1,1,3:'\U0001\U0308\U0903'
    0,1,2:'\U0001\U0904' 0,1,2,3:'\U0001\U0308\U0904' 0,1,2:'\U0001\U0D4E' 0,1,2,3:'\U0001\U0308\U0D4E' 0,1,2:'\U0001\U0915' 0,1,2,3:'\U0001\U0308\U0915'
    0,1,2:'\U0001\U231A' 0,1,2,3:'\U0001\U0308\U231A' 0,1,2:'\U0001\U0300' 0,1,1,3:'\U0001\U0308\U0300' 0,1,2:'\U0001\U093C' 0,1,1,3:'\U0001\U0308\U093C'
    0,1,2:'\U0001\U094D' 0,1,1,3:'\U0001\U0308\U094D' 0,1,2:'\U0001\U200D' 0,1,1,3:'\U0001\U0308\U200D' 0,1,2:'\U0001\U0378' 0,1,2,3:'\U0001\U0308\U0378'
    0,1,2:'\U034F\U0020' 0,0,2,3:'\U034F\U0308\U0020' 0,1,2:'\U034F\U000D' 0,0,2,3:'\U034F\U0308\U000D' 0,1,2:'\U034F\U000A' 0,0,2,3:'\U034F\U0308\U000A'
    0,1,2:'\U034F\U0001' 0,0,2,3:'\U034F\U0308\U0001' 0,0,2:'\U034F\U034F' 0,0,0,3:'\U034F\U0308\U034F' 0,1,2:'\U034F\U1F1E6' 0,0,2,3:'\U034F\U0308\U1F1E6'
    0,1,2:'\U034F\U0600' 0,0,2,3:'\U034F\U0308\U0600' 0,0,2:'\U034F\U0A03' 0,0,0,3:'\U034F\U0308\U0A03' 0,1,2:'\U034F\U1100' 0,0,2,3:'\U034F\U0308\U1100'
    0,1,2:'\U034F\U1160' 0,0,2,3:'\U034F\U0308\U1160' 0,1,2:'\U034F\U11A8' 0,0,2,3:'\U034F\U0308\U11A8' 0,1,2:'\U034F\UAC00' 0,0,2,3:'\U034F\U0308\UAC00'
    0,1,2:'\U034F\UAC01' 0,0,2,3:'\U034F\U0308\UAC01' 0,0,2:'\U034F\U0900' 0,0,0,3:'\U034F\U0308\U0900' 0,0,2:'\U034F\U0903' 0,0,0,3:'\U034F\U0308\U0903'
    0,1,2:'\U034F\U0904' 0,0,2,3:'\U034F\U0308\U0904' 0,1,2:'\U034F\U0D4E' 0,0,2,3:'\U034F\U0308\U0D4E' 0,1,2:'\U034F\U0915' 0,0,2,3:'\U034F\U0308\U0915'
    0,1,2:'\U034F\U231A' 0,0,2,3:'\U034F\U0308\U231A' 0,0,2:'\U034F\U0300' 0,0,0,3:'\U034F\U0308\U0300' 0,0,2:'\U034F\U093C' 0,0,0,3:'\U034F\U0308\U093C'
    0,0,2:'\U034F\U094D' 0,0,0,3:'\U034F\U0308\U094D' 0,0,2:'\U034F\U200D' 0,0,0,3:'\U034F\U0308\U200D' 0,1,2:'\U034F\U0378' 0,0,2,3:'\U034F\U0308\U0378'
    0,1,2:'\U1F1E6\U0020' 0,0,2,3:'\U1F1E6\U0308\U0020' 0,1,2:'\U1F1E6\U000D' 0,0,2,3:'\U1F1E6\U0308\U000D' 0,1,2:'\U1F1E6\U000A' 0,0,2,3:'\U1F1E6\U0308\U000A'
    0,1,2:'\U1F1E6\U0001' 0,0,2,3:'\U1F1E6\U0308\U0001' 0,0,2:'\U1F1E6\U034F' 0,0,0,3:'\U1F1E6\U0308\U034F' 0,0,2:'\U1F1E6\U1F1E6'
    0,0,2,3:'\U1F1E6\U0308\U1F1E6' 0,1,2:'\U1F1E6\U0600' 0,0,2,3:'\U1F1E6\U0308\U0600' 0,0,2:'\U1F1E6\U0A03' 0,0,0,3:'\U1F1E6\U0308\U0A03'
    0,1,2:'\U1F1E6\U1100' 0,0,2,3:'\U1F1E6\U0308\U1100' 0,1,2:'\U1F1E6\U1160' 0,0,2,3:'\U1F1E6\U0308\U1160' 0,1,2:'\U1F1E6\U11A8' 0,0,2,3:'\U1F1E6\U0308\U11A8'
    0,1,2:'\U1F1E6\UAC00' 0,0,2,3:'\U1F1E6\U0308\UAC00' 0,1,2:'\U1F1E6\UAC01' 0,0,2,3:'\U1F1E6\U0308\UAC01' 0,0,2:'\U1F1E6\U0900' 0,0,0,3:'\U1F1E6\U0308\U0900'
    0,0,2:'\U1F1E6\U0903' 0,0,0,3:'\U1F1E6\U0308\U0903' 0,1,2:'\U1F1E6\U0904' 0,0,2,3:'\U1F1E6\U0308\U0904' 0,1,2:'\U1F1E6\U0D4E' 0,0,2,3:'\U1F1E6\U0308\U0D4E'
    0,1,2:'\U1F1E6\U0915' 0,0,2,3:'\U1F1E6\U0308\U0915' 0,1,2:'\U1F1E6\U231A' 0,0,2,3:'\U1F1E6\U0308\U231A' 0,0,2:'\U1F1E6\U0300' 0,0,0,3:'\U1F1E6\U0308\U0300'
    0,0,2:'\U1F1E6\U093C' 0,0,0,3:'\U1F1E6\U0308\U093C' 0,0,2:'\U1F1E6\U094D' 0,0,0,3:'\U1F1E6\U0308\U094D' 0,0,2:'\U1F1E6\U200D' 0,0,0,3:'\U1F1E6\U0308\U200D'
    0,1,2:'\U1F1E6\U0378' 0,0,2,3:'\U1F1E6\U0308\U0378' 0,0,2:'\U0600\U0020' 0,0,2,3:'\U0600\U0308\U0020' 0,1,2:'\U0600\U000D' 0,0,2,3:'\U0600\U0308\U000D'
    0,1,2:'\U0600\U000A' 0,0,2,3:'\U0600\U0308\U000A' 0,1,2:'\U0600\U0001' 0,0,2,3:'\U0600\U0308\U0001' 0,0,2:'\U0600\U034F' 0,0,0,3:'\U0600\U0308\U034F'
    0,0,2:'\U0600\U1F1E6' 0,0,2,3:'\U0600\U0308\U1F1E6' 0,0,2:'\U0600\U0600' 0,0,2,3:'\U0600\U0308\U0600' 0,0,2:'\U0600\U0A03' 0,0,0,3:'\U0600\U0308\U0A03'
    0,0,2:'\U0600\U1100' 0,0,2,3:'\U0600\U0308\U1100' 0,0,2:'\U0600\U1160' 0,0,2,3:'\U0600\U0308\U1160' 0,0,2:'\U0600\U11A8' 0,0,2,3:'\U0600\U0308\U11A8'
    0,0,2:'\U0600\UAC00' 0,0,2,3:'\U0600\U0308\UAC00' 0,0,2:'\U0600\UAC01' 0,0,2,3:'\U0600\U0308\UAC01' 0,0,2:'\U0600\U0900' 0,0,0,3:'\U0600\U0308\U0900'
    0,0,2:'\U0600\U0903' 0,0,0,3:'\U0600\U0308\U0903' 0,0,2:'\U0600\U0904' 0,0,2,3:'\U0600\U0308\U0904' 0,0,2:'\U0600\U0D4E' 0,0,2,3:'\U0600\U0308\U0D4E'
    0,0,2:'\U0600\U0915' 0,0,2,3:'\U0600\U0308\U0915' 0,0,2:'\U0600\U231A' 0,0,2,3:'\U0600\U0308\U231A' 0,0,2:'\U0600\U0300' 0,0,0,3:'\U0600\U0308\U0300'
    0,0,2:'\U0600\U093C' 0,0,0,3:'\U0600\U0308\U093C' 0,0,2:'\U0600\U094D' 0,0,0,3:'\U0600\U0308\U094D' 0,0,2:'\U0600\U200D' 0,0,0,3:'\U0600\U0308\U200D'
    0,0,2:'\U0600\U0378' 0,0,2,3:'\U0600\U0308\U0378' 0,1,2:'\U0A03\U0020' 0,0,2,3:'\U0A03\U0308\U0020' 0,1,2:'\U0A03\U000D' 0,0,2,3:'\U0A03\U0308\U000D'
    0,1,2:'\U0A03\U000A' 0,0,2,3:'\U0A03\U0308\U000A' 0,1,2:'\U0A03\U0001' 0,0,2,3:'\U0A03\U0308\U0001' 0,0,2:'\U0A03\U034F' 0,0,0,3:'\U0A03\U0308\U034F'
    0,1,2:'\U0A03\U1F1E6' 0,0,2,3:'\U0A03\U0308\U1F1E6' 0,1,2:'\U0A03\U0600' 0,0,2,3:'\U0A03\U0308\U0600' 0,0,2:'\U0A03\U0A03' 0,0,0,3:'\U0A03\U0308\U0A03'
    0,1,2:'\U0A03\U1100' 0,0,2,3:'\U0A03\U0308\U1100' 0,1,2:'\U0A03\U1160' 0,0,2,3:'\U0A03\U0308\U1160' 0,1,2:'\U0A03\U11A8' 0,0,2,3:'\U0A03\U0308\U11A8'
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    0,0,2,3:'\U0061\U200D\U1F6D1' 0,0,0,3:'\U2701\U200D\U2701' 0,0,2,3:'\U0061\U200D\U2701' 0,1,2:'\U0915\U0924' 0,0,0,3:'\U0915\U094D\U0924'
    0,0,0,0,4:'\U0915\U094D\U094D\U0924' 0,0,0,0,4:'\U0915\U094D\U200D\U0924' 0,0,0,0,0,5:'\U0915\U093C\U200D\U094D\U0924'
    0,0,0,0,0,5:'\U0915\U093C\U094D\U200D\U0924' 0,0,0,0,0,5:'\U0915\U094D\U0924\U094D\U092F' 0,0,2,3:'\U0915\U094D\U0061' 0,0,2,3:'\U0061\U094D\U0924'
    0,0,2,3:'\U003F\U094D\U0924' 0,0,0,0,4:'\U0915\U094D\U094D\U0924'
  )
  function ble/test:canvas/GraphemeClusterBreak/find-previous-boundary {
    local ans=${1%%:*} str=${1#*:}
    builtin eval "local s=\$'$str'"
    ble/string#split ans , "$ans"
    local k=0 b=0
    for k in "${!ans[@]}"; do
      ble/test:canvas/GraphemeCluster/.locate-code-point "$s." "$((k+1))"; local i=$ret
      ble/test:canvas/GraphemeCluster/.locate-code-point "$s" "${ans[k]}"; local a=$ret
      ble/test "ble/unicode/GraphemeCluster/find-previous-boundary \$'$str' $i" ret="$a"
      if ((a>b)); then
        local ret= c= w= cs= extend=
        ble/test "ble/unicode/GraphemeCluster/match \$'$str' $b && ((ret=b+1+extend))" ret="$a"
        ((b=a))
      fi
    done
  }
  if ((_ble_bash>=40200)); then
    for spec in "${tests_cases[@]}"; do
      ble/test:canvas/GraphemeClusterBreak/find-previous-boundary "$spec"
    done
  fi
)
ble/test/end-section