MYDIR=$PWD

: ${TMPDIR:=/tmp}
GDIR=$TMPDIR/gtest-$$

shopt -s extglob

mkdir $GDIR || exit 1
cd $GDIR || exit 1

touch a.c

echo +([[:alpha:].])
echo +([[:alpha:].])+([[:alpha:].])
echo *([[:alpha:].])
echo *([[:alpha:].])*([[:alpha:].])

echo ?([[:alpha:].])?([[:alpha:].])?([[:alpha:].])
echo @([[:alpha:].])@([[:alpha:].])@([[:alpha:].])

case . in
!([[:alpha:].]) )	echo bad 1;;
*)			echo ok 1;;
esac

case . in
?([[:alpha:].]) )	echo ok 2;;
*)			echo bad 2;;
esac

case . in
@([[:alpha:].]) )	echo ok 3;;
*)			echo bad 3;;
esac

cd "$MYDIR"
rm -rf $GDIR