source: kBuild/trunk/src/grep/tests/utf8-bracket

#!/bin/sh
# Check bracket expressions in a UTF-8 locale.

# Copyright 2015-2021 Free Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

. "${srcdir=.}/init.sh"; path_prepend_ ../src
require_en_utf8_locale_

printf '1\n2\n' >in || framework_failure_

fail=0

for locale in C en_US.UTF-8; do
  for options in -qz -qzE; do
    case $options in
      *E*) parens='()';;
      *) parens='\(\)';;
    esac
    for pattern in '1.2' '[12].2' '[1-2].2' '[1-2][^a][1-2]'; do
      for suffix in '' "$parens\\1"; do
        LC_ALL=$locale grep $options "$pattern$suffix" in || fail=1
      done
    done
  done
done

Exit $fail