added test coverage to image controler

src/controllers/ImageController.ts

@@ -3,7 +3,7 @@ import imageService from "../services/ImageService";
 import mongoose, { mongo } from "mongoose";
 
 class ImageController {
-  async getAllImages(req: Request, res: Response): Promise<void> {
+  async getAllImages(_: Request, res: Response): Promise<void> {
     try {
       const images = await imageService.findAll();
       res.json({ images });

tests/app.test.ts

@@ -83,6 +83,21 @@ describe("GET /images works properly", async () => {
   it("should return a 200", async () => {
     expect(res.statusCode).toBe(200);
   });
+
+  it("should return 500 for an error on the service", async () => {
+    mock.module("../src/services/ImageService", () => ({
+      default: {
+        add: () => {
+          throw new Error("This is an expected testing error");
+        },
+      },
+    }));
+
+    const res = await request(app)
+      .get("/images");
+
+    expect(res.status).toBe(500);
+  });
 });
 
 describe("POST /images works properly", () => {