failures=0

check() {
	if [ $(($1)) != $2 ]; then
		failures=$((failures+1))
		echo "For $1, expected $2 actual $(($1))"
	fi
}

readonly ro=4
rw=1
check "0 && 0 / 0" 0
check "1 || 0 / 0" 1
check "0 && (ro = 2)" 0
check "ro" 4
check "1 || (ro = -1)" 1
check "ro" 4
check "0 && (rw += 1)" 0
check "rw" 1
check "1 || (rw += 1)" 1
check "rw" 1
check "0 ? 44 / 0 : 51" 51
check "0 ? ro = 3 : 52" 52
check "ro" 4
check "0 ? rw += 1 : 52" 52
check "rw" 1
check "1 ? 68 : 30 / 0" 68
check "2 ? 1 : (ro += 2)" 1
check "ro" 4
check "4 ? 1 : (rw += 1)" 1
check "rw" 1

exit $((failures != 0))