test(backend): Testen voor DatabaseLearningObjectProvider.getLearningObjectById toegevoegd.

backend/tests/test-assets/learning-objects/create-example-learning-object-with-attachments.ts

@@ -0,0 +1,10 @@
+import {LearningObjectExample} from "./learning-object-example";
+import {LearningObject} from "../../../src/entities/content/learning-object.entity";
+
+export function createExampleLearningObjectWithAttachments(example: LearningObjectExample): LearningObject {
+    let learningObject = example.createLearningObject();
+    for (let creationFn of Object.values(example.createAttachment)) {
+        learningObject.attachments.push(creationFn(learningObject));
+    }
+    return learningObject;
+}

backend/tests/test-assets/learning-objects/pn_werkingnotebooks/pn-werkingnotebooks-example.ts

@@ -41,10 +41,7 @@ const example: LearningObjectExample = {
 
         let returnValue = new ReturnValue();
         returnValue.callbackUrl = "callback_url_example";
-        returnValue.callbackSchema = `{
-                                  att: "test",
-                                  att2: "test2"
-                              }`;
+        returnValue.callbackSchema = '{"att": "test", "att2": "test2"}';
 
         learningObject.returnValue = returnValue;
         learningObject.available = true;