SuperTest - App is not defined

Question

I'm new to test driven development and am trying to use supertest to teach myself. I'm confused as to why I keep getting the error "app is not defined"? It is from my calls to request(app) which I have bolded below. I tried to look up the documentation but there doesn't seem to be much. All of my routes are in a file called "middleware", and that file starts like this:

 var bodyParser = require('body-parser');
    var helpers = require('./helpers.js'); // our custom middleware
    var db = require('../DB/DB.js');
    var router = require('../routes.js');
    var path = require('path');
    var fs = require('fs');
    var gm = require('gm');


    module.exports = function (app, express) {}

The actual file where I use supertest to test the middleware file's routes:

    var chai = require('chai')
    var assert = chai.assert;
    var should = chai.should();
    var expect = chai.expect;
    var helpers = require("../config/helpers.js");
    var middleware = require("../config/middleware.js");
    // for when we eventually want to test against mock data
    var fs = require('fs');
    var path = require('path');
    var supertest = require("supertest")(middleware);

describe('middleware API', function() {


  it('responds with binary data', function(done) {
    var imagePath = path.join(__dirname, '/../assets/drawings/', userName + '.png');
    **request(app)**
      .get(imagePath)
      .expect(201)
      .expect('Content-Type', 'image.png')
      .parse(binaryParser)
      .end(function(err, res) {
        if (err) return done(err);

        // binary response data is in res.body as a buffer
        assert.ok(Buffer.isBuffer(res.body));
        console.log("res=", res.body);

        done();
      });
  });

  it('sends back one image', function(done) {
    **request(app)**
      .get('/game/')
      .expect(201)
      .expect('Content-Type', 'image.png')
      .expect('Content-Length', '1')
      .parse(binaryParser)
      .end(function(err, res) {
        if (err) return done(err);

        // binary response data is in res.body as a buffer
        assert.ok(Buffer.isBuffer(res.body));
        console.log("res=", res.body);

        done();
      })

  })
})

score 3 · Accepted Answer · answered Sep 29 '15 at 00:31

In the top of your file you need to define express and app, ie:

var express        = require('express'),
    app            = express();

Also, make sure that you've installed express, ie thru command line in node:

npm install express --save

(using "--save" adds it to your package.json file, which makes it easy to keep track of the version, etc, but also installs automatically if somebody else installs your project using npm install).

SuperTest - App is not defined

1 Answers1