Simple Unit Testing NodeJS Express

Question

I have been very new testing, so can anyone of you help me with how to write a test case for the below code.

import fs from 'fs';
import express from 'express';
const app = express();
const port = 6500;

app.get('/',(req,res)=>{
    res.send('<h1>Welcome to api For Fs</h1>')
});

app.listen(port,(err)=>{
    console.log(`Server is running on port ${port}`)
})

Answer 1

You can test it with mocha which is a test runner and chai which is an assert module (Which helps to verify your result)

let chai = require('chai');
let chaiHttp = require('chai-http');
let expect = chai.expect;
chai.use(chaiHttp);

describe('Testing my get Api', () => {
    it('should be return status 200 for /', function(done){
        chai
            .request('http://localhost:6500')
            .get('/')
            .then(function(res){
                expect(res).to.have.status(200);
                done();
            })
            .catch(function(err){
                throw(err);
            });
    });

}}