bot-api/tests/app.test.ts

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

const imageServiceOriginal = imageService;

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

describe("GET / shows all of the endpoints", async () => {
    const res = await request(app).get("/");

    it("should be", async () => {
        expect(res.body).toHaveProperty("endpoints");
    });

    it("should be an array", () => {
        expect(Array.isArray(res.body.endpoints)).toBeTrue();
    })
})

describe("GET /images works properly", async () => {
    const res = await request(app).get("/images");

    it("should be an array", () => {
        expect(Array.isArray(res.body.images)).toBeTrue();
    });

    it("should return a 200", async () => {
        expect(res.statusCode).toBe(200);
    });
});

describe("POST /images works properly", () => {
    it("should return 201 for new image", async () => {
        const res = await request(app).post("/images").send({
            url: "https://test.url.com/1",
            status: "available",
            tags: ["2girls", "touhou"]
        });
        expect(res.status).toSatisfy(status => [201].includes(status));
    });

    it("should return 409 for a repeated images", async () => {
        await request(app).post("/images").send({
            url: "https://test.url.com/2",
            status: "available",
            tags: ["2girls", "touhou"]
        });

        const res = await request(app).post("/images").send({
            url: "https://test.url.com/2",
            status: "available",
            tags: ["2girls", "touhou"]
        });

        expect(res.status).toBe(409);
    });

    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).post("/images").send({
            url: "https://test.url.com/3",
            status: "available",
            tags: ["2girls", "touhou"]
        });
        
        expect(res.status).toBe(500);
    });

    it("should return 400 for malformed requests", async () => {
        mock.restore();
        const res = await request(app).post("/images").send({
            url: "https://test.url.com/4",
            status: "wrong",
            tags: ["2girls", "touhou"]
        });
        expect(res.status).toBe(400);
    });
});