This once again does NOT compile. I've done work on macros; they don't work yet..

unit-tests/multiply.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+result=0
+
+echo -n "$0: multiply two integers... "
+
+expected='6'
+actual=`echo "(multiply 2 3)" | target/psse 2>/dev/null | tail -1`
+
+if [ "${expected}" = "${actual}" ]
+then
+    echo "OK"
+else
+    echo "Fail: expected '${expected}', got '${actual}'"
+    result=`echo "${result} + 1" | bc`
+fi
+
+echo -n "$0: multiply a real by an integer... "
+
+expected='7.5'
+actual=`echo "(multiply 2.5 3)" | target/psse 2>/dev/null | tail -1`
+
+if [ "${expected}" = "${actual}" ]
+then
+    echo "OK"
+else
+    echo "Fail: expected '${expected}', got '${actual}'"
+    result=`echo "${result} + 1" | bc`
+fi
+
+exit ${result}