test(backend): Testen voor LearningObjectService toegevoegd

backend/src/interfaces/learning-content.ts

@@ -65,7 +65,7 @@ export interface LearningObjectMetadata {
     uuid: string;
     hruid: string;
     version: number;
-    language: string;
+    language: Language;
     title: string;
     description: string;
     difficulty: number;

backend/src/services/learning-objects/dwengo-api-learning-object-provider.ts

@@ -107,7 +107,7 @@ const dwengoApiLearningObjectProvider: LearningObjectProvider = {
             }
         );
 
-        if (!metadata) {
+        if (!metadata || typeof metadata !== "object") {
             console.error(`⚠️ WARNING: Learning object "${id.hruid}" not found.`);
             return null;
         }