fix(backend): Fouten in isTransitionPossible en het opzetten van de testdata verbeterd.

backend/src/services/learning-paths/database-learning-path-provider.ts

@@ -97,14 +97,26 @@ async function convertNodes(
                 learningobject_hruid: node.learningObjectHruid,
                 version: learningObject.version,
                 transitions: node.transitions
-                    .filter((trans) => !personalizedFor || isTransitionPossible(trans, lastSubmission)) // If we want a personalized learning path, remove all transitions that aren't possible.
-                    .map((trans, i) => convertTransition(trans, i, nodesToLearningObjects)), // Then convert all the transition
+                    .filter((trans) =>
+                        !personalizedFor || isTransitionPossible(trans, optionalJsonStringToObject(lastSubmission?.content))  // If we want a personalized learning path, remove all transitions that aren't possible.
+                    ).map((trans, i) => convertTransition(trans, i, nodesToLearningObjects)), // Then convert all the transition
             };
         })
         .toArray();
     return await Promise.all(nodesPromise);
 }
 
+/**
+ * Helper method to convert a json string to an object, or null if it is undefined.
+ */
+function optionalJsonStringToObject(jsonString?: string): object | null {
+    if (!jsonString) {
+        return null;
+    } else {
+        return JSON.parse(jsonString);
+    }
+}
+
 /**
  * Helper function which converts a transition in the database representation to a transition in the representation
  * the Dwengo API uses.

backend/src/services/learning-paths/learning-path-personalization-util.ts

@@ -36,5 +36,6 @@ export function isTransitionPossible(transition: LearningPathTransition, submitt
     if (submitted === null) {
         return false; // If the transition is not unconditional and there was no submission, the transition is not possible.
     }
-    return JSONPath({ path: transition.condition, json: submitted }).length === 0;
+    const match = JSONPath({ path: transition.condition, json: {submission: submitted} })
+    return match.length === 1;
 }