fix: unit tests for resolve initialized

Author: madeindjs

src/services/listener-explorer.service.ts

@@ -68,7 +68,9 @@ export class ListenerExplorerService implements OnModuleInit {
         },
       );
 
-      this.resolveInitialized();
+      if (this.resolveInitialized instanceof Function) {
+        this.resolveInitialized();
+      }
     });
   }
 }

src/services/worker.service.spec.ts

@@ -16,6 +16,7 @@ describe(WorkerService.name, () => {
           provide: ListenerExplorerService,
           useValue: {
             listeners: [],
+            ensureInitialized: () => {},
           },
         },
         {