A simple TDD case for a `/cats` endpoint

testCatsEndpoint.js

import chai, { expect } from "chai";
import chaiHttp from "chai-http";
import server from "../server";

chai.use(chaiHttp);

const ENDPOINT = "/api/v1/cats";
let request = null;

describe("/api/v1/cats", () => {
  before(() => {
    request = chai.request(server).keepOpen();
  });

  after(() => request.close());

  describe("GET /", () => {
    it("should respond with an array of cats", done => {
      request.get(ENDPOINT).then(res => {
        expect(res.body).to.be.an("array").that.is.not.empty;
        done();
      });
    });
  });
});

Keeps server connection open/close (to aid multiple requests) using Mocha before/after hooks.

before(() => {
    request = chai.request(server).keepOpen();
  });

so instead of doing this for every request in all test suite

chai.request(app).get(someEndpoint)

we have this instead

request.get(endpoint)

The test verifies that the endpoint responds with an array of cats

Good job. Your explanations made it easier to understand.

Superb one, @codeshifu.

Thanks for providing clarity with the comment, too. 🎉