Supertest express setup cause timeout error-CodePudding

Hi javascript hackers!

I have a simple setup in server.test.js

import 'regenerator-runtime/runtime';

const request = require('supertest');
const express = require("express")
const app = express();

app.get('/user', function(req, res) {
  res.status(200).json({ name: 'john' });
});

describe('GET /user', function() {
  it('responds with json', async function(done) {
    const response = await request(app)
      .get('/user')
    expect(response.status).toBe(201)
  })
})

npx jest and receive thrown: "Exceeded timeout of 5000 ms for a test., increasing timeout doesn't help in jest.config.js to testTimeout: 20000, it wait 20s and also failed

Why express app doesn't start with supertest ? I used example from official README

CodePudding user response：

Try to remove done from the test callback:

it('responds with json', async function() {
  const response = await request(app)
    .get('/user')
  expect(response.status).toBe(201)
})

Jest may be waiting for it to be called.

Generally it's recommended that you either use an async function or done. Jest normally warns if you mix them, not sure why it doesn't do so wit this setup.

Alternatively you can try to call done() at the end of the test.

You should expect for the test to fail because the status that gets posted is 200 and you are checking for 201.