test.js

/* eslint-env mocha */

const nock = require('nock');
const assert = require('assert');
const { AssertionError } = require('assert');

const { functionundertest } = require('../index');

describe('Testing Errors caused by HTTP Response', () => {
  let scope;
  
  before('Set up a fake HTTP Server', () => {
    scope = nock('https://api.example.com/')
      .get('/test')
      .delay(2000) // delay the response for extra realism
      .reply(504, 'Gateway Timeout');
  });
  
  it('Returns an empty object when the remote server does not respond in time', async () => {
    const result = await functionundertest(); // this function makes requests to https://api.example.com
    assert.deepEqualStrict(result, {});
  }).timeout(5000); // increase the timeout
  
  after('Assert that the HTTP request has been made', () => {
    scope.done();
  });
});