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._pile (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 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._pile (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.

• javascript
• node.js

Share Improve this question Follow edited Feb 2, 2017 at 23:30 Scary asked Feb 2, 2017 at 23:17 ScaryScary 9133 gold badges33 silver badges88 bronze badges 3

• 2 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 plain 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 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 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 Commented Feb 2, 2017 at 23:31

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3 Answers 3

Sorted by: Reset to default 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

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

module.exports = app;

You should try this:

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