test: answer controller frontend

frontend/tests/controllers/answers-controller.test.ts

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+import { describe, it, expect, beforeEach } from "vitest";
+import { AnswerController } from "../../src/controllers/answers";
+import { Language } from "@dwengo-1/common/util/language";
+
+describe("AnswerController Tests", () => {
+    let controller: AnswerController;
+
+    beforeEach(() => {
+        const loiDTO = {
+            hruid: "u_test_multiple_choice",
+            language: Language.English,
+            version: 1,
+        };
+        const questionId = { learningObjectIdentifier: loiDTO, sequenceNumber: 1 };
+        controller = new AnswerController(questionId);
+    });
+
+    it("should fetch all answers", async () => {
+        const result = await controller.getAll(true);
+        expect(result).toHaveProperty("answers");
+        expect(Array.isArray(result.answers)).toBe(true);
+        expect(result.answers.length).toBeGreaterThan(0);
+    });
+
+    it("should fetch an answer by sequencenumber", async () => {
+        const answerNumber = 1; // Example sequence number
+        const result = await controller.getBy(answerNumber);
+        expect(result).toHaveProperty("answer");
+        expect(result.answer).toHaveProperty("sequenceNumber", answerNumber);
+    });
+});
+
+