V0.35.0. Adding netscript_tests in game testbench.

src/NetscriptEnvironment.js

@@ -1,4 +1,7 @@
+import {HacknetNode}                    from "./HacknetNode.js";
 import {NetscriptFunctions}             from "./NetscriptFunctions.js";
+import {NetscriptPort}                  from "./NetscriptPort.js";
+
 /* Environment
  * 	NetScript program environment
  */
@@ -73,6 +76,14 @@ Environment.prototype = {
             }
             res = res[i];
         }
+
+        //Cant assign to ports or HacknetNodes
+        if (res[idx[idx.length-1]] instanceof HacknetNode) {
+            throw new Error("Cannot assign a Hacknet Node handle to a new value");
+        }
+        if (res[idx[idx.length-1]] instanceof NetscriptPort) {
+            throw new Error("Cannot assign a Netscript Port handle to a new value");
+        }
         return res[idx[idx.length-1]] = value;
     },