node.js ReferenceError: server is not defined

Question

The below code is from server.js, it's causing my server to crash with Error:

ReferenceError: server is not defined at Object. (C:\xampp\htdocs\api\src\server.js:17:18) at Module._compile (module.js:571:32) at Object.Module._extensions..js (module.js:580:10) at Module.load (module.js:488:32) at tryModuleLoad (module.js:447:12) at Function.Module._load (module.js:439:3) at Module.runMain (module.js:605:10) at run (bootstrap_node.js:418:7) at startup (bootstrap_node.js:139:9) at bootstrap_node.js:533:3

var express = require('express');
var body_parser = require('body-parser');
var app = express()

// Port config
var port = 3000;

app.use(body_parser.json());

// Use prefix of api
app.use('/api', require('../routes/api.js')(express));

app.listen(port, function(){
  console.log('Server Active on', port);
});

module.exports = server;

Mocha testing (__app.js)

var request = require('supertest');

describe('API', function() {

var server;

beforeEach(function () {
  server = require('../src/server.js');
});

afterEach(function () {
  server.close();
});

it('/ should return specified object.', function (done) {
  request(server)
    .get('/api/')
    .set('Accept', 'application/json')
    .expect('Content-Type', /json/)
    .expect(200, {"hello": "world"}, done);
});

it('/status should return specified healthy:true', function (done) {
  request(server)
    .get('/api/status')
    .set('Accept', 'application/json')
    .expect('Content-Type', /json/)
    .expect(200, {"healthy": true}, done);
});

it('/user/id should return user object with id.', function (done) {
  var fakeUserID = 374;
  request(server)
    .get('/api/user/347' + fakeUserID)
    .set('Accept', 'application/json')
    .expect('Content-Type', /json/)
    .expect(200, {user: {id: fakeUserID}}, done);
  });
});

Am I missing a package? I'm watching a video with the same exact code and it doesn't crash the server.

The error seems pretty obvious: You are trying to assign server to module.exports, but the variable server doesn't exist. What do you expect server to be? Why are you exporting something from that module at all? Simplest example to reproduce the error: Put module.exports = foo; into a file and run it. It will complain that foo is not defined. This has nothing to do with Node, nvm, express or any library. It's just how JavaScript works: You cannot read a variable doesn't exist. — Felix Kling
– Felix Kling, Commented Feb 2, 2017 at 23:23
I know, I get that. However, it is working on what I'm watching with the exact same code, so there's something going on. — Scary
– Scary, Commented Feb 2, 2017 at 23:28
"it is working on what I'm watching" Either server is defined there somewhere or they are not using server. Since we can't see the video, it's impossible for us to say. All we can say is that using server is the issue in your code. — Felix Kling
– Felix Kling, Commented Feb 2, 2017 at 23:31

Paul Fitzgerald · Accepted Answer · 2017-02-02 23:27:02Z

2

You want to export the app. No variable called server exists

module.exports = app;

You can then import the app elsewhere in your project using require

answered Feb 2, 2017 at 23:27

Paul Fitzgerald

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cybersam · Accepted Answer · 2017-02-02 23:26:57Z

1

server is not defined anywhere. As a guess, you probably want to change the last line to:

module.exports = app;

answered Feb 2, 2017 at 23:26

cybersam

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Comments

Zach Jensz · Accepted Answer · 2022-05-19 01:34:21Z

0

You should try this:

const server = app.listen(port, function(){
  console.log('Server Active on', port);
});

edited May 19, 2022 at 1:34

Zach Jensz

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answered May 14, 2022 at 13:54

Awais Zahid

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1 Comment

Zach Jensz Over a year ago

I don't think this alone will solve their issue Awais

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