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

backend/tests/services/learning-objects/database-learning-object-provider.test.ts

@@ -0,0 +1,52 @@
+import {beforeAll, describe, expect, it} from "vitest";
+import {setupTestApp} from "../../setup-tests";
+import {getLearningObjectRepository} from "../../../src/data/repositories";
+import example from "../../test-assets/learning-objects/pn_werkingnotebooks/pn-werkingnotebooks-example";
+import {LearningObject} from "../../../src/entities/content/learning-object.entity";
+import databaseLearningObjectProvider from "../../../src/services/learning-objects/database-learning-object-provider";
+import {
+    createExampleLearningObjectWithAttachments
+} from "../../test-assets/learning-objects/create-example-learning-object-with-attachments";
+import {expectToBeCorrectFilteredLearningObject} from "../../test-utils/expectations";
+import {FilteredLearningObject} from "../../../src/interfaces/learning-content";
+import {Language} from "../../../src/entities/content/language";
+
+async function initExampleData(): Promise<LearningObject> {
+    let learningObjectRepo = getLearningObjectRepository();
+    let exampleLearningObject = createExampleLearningObjectWithAttachments(example);
+    await learningObjectRepo.insert(exampleLearningObject);
+    return exampleLearningObject;
+}
+
+describe("DatabaseLearningObjectProvider", () => {
+    let exampleLearningObject: LearningObject;
+
+    beforeAll(async () => {
+        await setupTestApp();
+        exampleLearningObject = await initExampleData();
+    });
+
+    it("should return the learning object when it is queried by its id", async () => {
+        const result: FilteredLearningObject | null = await databaseLearningObjectProvider.getLearningObjectById(exampleLearningObject);
+        expect(result).toBeTruthy();
+        expectToBeCorrectFilteredLearningObject(result!, exampleLearningObject);
+    });
+
+    it("should return the learning object when it is queried by only hruid and language (but not version)", async () => {
+        const result: FilteredLearningObject | null = await databaseLearningObjectProvider.getLearningObjectById({
+            hruid: exampleLearningObject.hruid,
+            language: exampleLearningObject.language
+        });
+        expect(result).toBeTruthy();
+        expectToBeCorrectFilteredLearningObject(result!, exampleLearningObject);
+    });
+
+    it("should return null when queried with an id that does not exist", async () => {
+        const result: FilteredLearningObject | null = await databaseLearningObjectProvider.getLearningObjectById({
+            hruid: "non_existing_hruid",
+            language: Language.Dutch
+        });
+        expect(result).toBeNull();
+    });
+
+});