#   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 <http://www.gnu.org/licenses/>.
#
olddir=$PWD
: ${TMPDIR:=/var/tmp}
EMPTY=$TMPDIR/empty

shopt -s globstar
s()
{
  printf '== <%s> ==\n' "$@"
}
p()
{
  printf '<%q>\n' "$@"
}

mkdir -p $EMPTY/a/a/a
cd $EMPTY

# good
p **
p **/**
p **/**/**

rm -rf a
mkdir -p $EMPTY/{a,b}/{a,b}/{a,b}/{a,b}
cd $EMPTY

# good
s '**/a'
p **/a

# good
s 'a/**'
p a/**

# good
s '**'
p **

# good
s '**/**'
p **/**

# good
s '**/**/**'
p **/**/**

# good
s '**/**/**/**/**'
p **/**/**/**/**

# good
s '**/**/a'
p **/**/a

# good 
s 'a/**/**'
p a/**/**

# good
s 'a/**/**/**'
p a/**/**/**

# good
s 'a/**/**/**/**'
p a/**/**/**/**

# same as ksh93
s '**/a/**'
p **/a/**

# same as ksh93
s '**/a/**/**'
p **/a/**/**

# same as ksh93
s '**/a/**/**/**'
p **/a/**/**/**

# good
s '**/**/a/**'
p **/**/a/**

cd "$olddir"
rm -rf $EMPTY