fe-middleware/test/ImageController/ImageController.test.ts

import { afterEach, describe, expect, it, mock } from "bun:test";
import app from "src/app";
import ImageService from "src/services/ImageService";
import request from "supertest";

const imageServiceOriginal = ImageService;

afterEach(() => {
  mock.restore();
  mock.module("src/services/ImageService", () => ({
    default: imageServiceOriginal,
  }));
});

describe("endpoint returns the correct status codes", () => {
  it("should return 200 if successful", async () => {
    // Can't mock ImageService partially because of bun incomplete implementation of testing :(
    // It goes to the network directly to test
    const res = await request(app).get("/image");
    expect(res.status).toBe(200);
  });

  it("should return 500 if any error happens", async () => {
    mock.module("src/services/ImageService", () => {
      return {
        default: {
          get: () => {
            throw new Error("Controlled error");
          },
        },
      };
    });
    const res = await request(app).get("/image");
    expect(res.status).toBe(500);
  });
});