API Testing · Backend Development

Explanation

Automated tests prove routes, auth, and validation still work after every change.

Code example

javascript

import request from "supertest";
import { app } from "../src/app";

test("GET /api/skills returns 200", async () => {
  const res = await request(app).get("/api/skills");
  expect(res.status).toBe(200);
  expect(Array.isArray(res.body)).toBe(true);
});

Helpful resources

Jest documentation
Official Jest testing docs.
DocumentationFreeOfficial45 min
Jest crash course — Traversy Media
JavaScript testing with Jest on YouTube.
YoutubeFree40 min

Exercise

Write tests for create skill success and 400 validation failure using Supertest.

Your notes