fix unit test

dist/resources/templates/preload.template

@@ -7,7 +7,7 @@
 import fs from 'fs';
 import { fileURLToPath } from "url";
 import { Logger, AppConfig, FunctionRegistry, Platform } from 'mercury';
-// import the user functions
+// import composable functions
 ${import-statements}
 
 const log = Logger.getInstance();
@@ -39,9 +39,9 @@ export class ComposableLoader {
                 // initialize base configuration
                 const config = AppConfig.getInstance(resourcePath);
                 log.info(`Base configuration ${config.getId()}`);  
-                // load composable functions
+                // initialize composable functions
                 ${service-list}
-                // register them into the event system
+                // register the functions into the event system
                 const platform = Platform.getInstance();
                 const registry = new FunctionRegistry();
                 const registered = registry.getFunctions();

dist/util/function-registry.d.ts

@@ -2,15 +2,26 @@ import { EventEnvelope } from '../models/event-envelope.js';
 export declare class FunctionRegistry {
     constructor();
     /**
-     * Save a Composable class to the registry by name.
+     * Save a Composable function to the registry by name.
      *
      * @param that is the class instance of the Composable function
      * @param instances for concurrency
      * @param isPublic is true if function is visible thru event-over-http
      * @param isInterceptor is true if function is an event interceptor
      */
     saveFunction(that: object, instances: number, isPublic: boolean, isInterceptor: boolean): void;
+    /**
+     * Remove a composable function from the registry by name.
+     *
+     * @param name of the function
+     */
     removeFunction(name: string): void;
+    /**
+     * Retrieve metadata for the composable function
+     *
+     * @param name of the function
+     * @returns map of key-values
+     */
     getMetadata(name: string): object;
     /**
      * Retrieve a function by name so that you can register it programmatically.

test/po.test.ts

@@ -129,7 +129,7 @@ describe('post office use cases', () => {
       const appConfig = AppConfig.getInstance(resourcePath).getReader();
       // save the helloWorld as DEMO_LIBRARY_FUNCTION so that it can be retrieved by name
       const helloWorld = new HelloWorld();
-      registry.saveFunction(helloWorld);
+      registry.saveFunction(helloWorld, 1, false, false);
       platform = Platform.getInstance();
       // register a hello.world function to echo the incoming payload
       platform.register(HELLO_WORLD_SERVICE, helloWorld.handleEvent, false, HELLO_WORLD_INSTANCES);