Much work, all I think positive, but defun still doesn't work.

unit-tests/lambda.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+expected='(lambda (l) l)(1 2 3 4 5 6 7 8 9 10)'
+actual=`target/psse 2>/dev/null <<EOF
+(set! list (lambda (l) l))
+(list '(1 2 3 4 5 6 7 8 9 10))
+EOF`
+
+if [ "${expected}" = "${actual}" ]
+then
+    echo "OK"
+    exit 0
+else
+    echo "Fail: expected '${expected}', got '${actual}'"
+    exit 1
+fi