Error: listen EADDRINUSE: address already in use :::3000

Hey guys, so I have been just trying to start testing my Koa server using Supertest.

I am getting the error: Error: listen EADDRINUSE: address already in use :::3000

I have tried closing everything down on that port and run it but I’m still getting the issue.

Here is my app:

require('dotenv').config();
const Koa = require('koa');
const app = new Koa();
const router = require('./router');
const PORT = process.env.NODE_PORT || 3001;
const ENV = process.env.NODE_ENV || 'Development';
const logger = require('koa-logger');

app.use(logger());
app.use(router.routes());

app.listen(PORT, (err) => {
    if (err) console.error('❌ Unable to connect the server: ', err);
    console.log(`🌍 Server listening on port ${PORT} - ${ENV} environment`);
  });

    module.exports = app;

my router:

const Router = require('koa-router');
const router = new Router();

router.get('/', ctx => ctx.body = 'Sending some JSON');
  module.exports = router;

finally the test:

const server = require('../index');
const request = require('supertest').agent(server.listen());

afterEach(() => {
  server.close();
});

describe('routes: index', ()=> {
  it('should reach endpoint', async () => {
    const response = await request(server).get('/');
   
    expect(response.status).toEqual(200);
    expect(response.body).toEqual('Sending some JSON');
  });
});

my server isn’t even running on port 3000 it is running on 8080 however, just to make sure I will run my server on 3000 and it starts up no problem. I then try to run the test, I get the error again with the server running on 3000 and the server not. Kinda stuck

[dionisoros]

lsof -i:3000 
kill -9 [PID] 

[rimiti]

Could you send us the output of: lsof -i:3000