1 2failures=0 3 4check() { 5 if [ $(($1)) != $2 ]; then 6 failures=$((failures+1)) 7 echo "For $1, expected $2 actual $(($1))" 8 fi 9} 10 11check "1 << 1 + 1 | 1" 5 12 13exit $((failures != 0)) 14