fix(backend): Foute entity-structuur van leerpaden verbeterd.

Ook testen geschreven voor LearningPathRepository en LearningObjectRepository.

backend/tests/test-assets/learning-paths/learning-path-utils.ts

@@ -0,0 +1,24 @@
+import {Language} from "../../../src/entities/content/language";
+import {LearningPathTransition} from "../../../src/entities/content/learning-path-transition.entity";
+import {LearningPathNode} from "../../../src/entities/content/learning-path-node.entity";
+
+export function createLearningPathTransition(condition: string | null, to: LearningPathNode) {
+    let trans = new LearningPathTransition();
+    trans.condition = condition || "true";
+    trans.next = to;
+    return trans;
+}
+
+export function createLearningPathNode(
+    learningObjectHruid: string,
+    version: number,
+    language: Language,
+    startNode: boolean
+) {
+    let node = new LearningPathNode();
+    node.learningObjectHruid = learningObjectHruid;
+    node.version = version;
+    node.language = language;
+    node.startNode = startNode;
+    return node;
+}