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

import { afterEach, describe, expect, it, mock, jest } from "bun:test";
import Image from "src/types/Image";
import ImageService from "src/services/ImageService";
import GelbooruApiResponse from "src/types/GelbooruServiceResponse";
import { BotApiResponse } from "src/types/BotApiResponse";
import fs from "node:fs";
import ImageController from "src/controllers/ImageController";
import app from "src/app";
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);
    });
})