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

Ook testen geschreven voor LearningPathRepository en LearningObjectRepository.

backend/tests/data/content/learning-object-repository.test.ts

@@ -0,0 +1,71 @@
+import {beforeAll, describe, it, expect} from "vitest";
+import {LearningObjectRepository} from "../../../src/data/content/learning-object-repository";
+import {setupTestApp} from "../../setup-tests";
+import {getLearningObjectRepository} from "../../../src/data/repositories";
+import example from "../../test-assets/learning-objects/pn_werkingnotebooks/pn-werkingnotebooks-example.js"
+import {LearningObject} from "../../../src/entities/content/learning-object.entity";
+import {expectToBeCorrectEntity} from "../../test-utils/expect-to-be-correct-entity";
+
+describe("LearningObjectRepository", () => {
+    let learningObjectRepository: LearningObjectRepository;
+
+    let exampleLearningObject: LearningObject;
+
+    beforeAll(async () => {
+        await setupTestApp();
+        learningObjectRepository = getLearningObjectRepository();
+    });
+
+    it("should be able to add a learning object to it without an error", async () => {
+        exampleLearningObject = example.createLearningObject();
+        await learningObjectRepository.insert(exampleLearningObject);
+    });
+
+    it("should return the learning object when queried by id", async () => {
+        const result = await learningObjectRepository.findByIdentifier({
+            hruid: exampleLearningObject.hruid,
+            language: exampleLearningObject.language,
+            version: exampleLearningObject.version
+        });
+        expect(result).toBeInstanceOf(LearningObject);
+        console.log(result);
+        expectToBeCorrectEntity({
+            name: "actual",
+            entity: result!
+        }, {
+            name: "expected",
+            entity: exampleLearningObject
+        });
+    });
+
+    it("should return null when non-existing version is queried", async () => {
+        const result = await learningObjectRepository.findByIdentifier({
+            hruid: exampleLearningObject.hruid,
+            language: exampleLearningObject.language,
+            version: 100
+        });
+        expect(result).toBe(null);
+    });
+
+    let newerExample: LearningObject;
+
+    it("should allow a learning object with the same id except a different version to be added", async () => {
+        newerExample = example.createLearningObject();
+        newerExample.version = 10;
+        newerExample.title += " (nieuw)";
+        await learningObjectRepository.save(newerExample);
+    });
+
+    it("should return the newest version of the learning object when queried by only hruid and language", async () => {
+        const result = await learningObjectRepository.findLatestByHruidAndLanguage(newerExample.hruid, newerExample.language);
+        expect(result).toBeInstanceOf(LearningObject);
+        expect(result?.version).toBe(10);
+        expect(result?.title).toContain("(nieuw)");
+    });
+
+    it("should return null when queried by non-existing hruid or language", async () => {
+        const result = await learningObjectRepository.findLatestByHruidAndLanguage("something_that_does_not_exist", exampleLearningObject.language);
+        expect(result).toBe(null);
+    });
+
+});