CODEWITHSUNDEEP
node.jsresttesting
N34
N34

Reputation: 2233

ReferenceError: describe is not defined NodeJs

I am trying to define some endpoints and do a test using nodejs. In server.js I have:

var express = require('express');
var func1 = require('./func1.js');
var port = 8080;
var server = express();

server.configure(function(){
  server.use(express.bodyParser());
});

server.post('/testend/', func1.testend);

and in func1.js:

    var testend = function(req, res) {
           serialPort.write("1", function(err, results) {
           serialPort.write("2" + "\n", function(err, results) {
           });
      });
   });
    exports.testend = testend;

Now in test.js I am trying to use this endpoint:

var should = require('should');
var assert = require('assert');
var request = require('supertest');
var http = require('http');
var app = require('./../server.js');
var port = 8080;

describe('Account', function() {
        var url = "http://localhost:" + port.toString();
        it('test starts', function(done) {
                request(url).post('/testend/')
                // end handles the response
                .end(function(err, res) {
                        if (err) {
                                throw err;
                        }
                        res.body.error.should.type('string');
                        done();
                });
        });
});

But when I run node test.js I am getting this error:

describe('Account', function() {
^

ReferenceError: describe is not defined
    at Object. (/test/test.js:9:1)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:906:3

How can I fix the issue?

Upvotes: 217

Views: 278973

Answers (9)

pedrommuller
pedrommuller

Reputation: 16056

In my case it was only an issue with the linter, so I created a file in the root folder, in this case to use Chai

{
    "env": {
        "browser": true,
        "node": true,
        "chai": true
    }
}

Upvotes: 0

Dmitry Grinko
Dmitry Grinko

Reputation: 15204

for Jest you have to add "jest": true to .eslintrc

{
  "env": {
    "browser": true,
    "es6": true,
    "jest": true
  },
...

Upvotes: 5

Sidrah Madiha Siddiqui
Sidrah Madiha Siddiqui

Reputation: 1364

  • Make sure you have a folder named as test that contains your test.js file.
  • Also make sure you have mocha available in your project by running mocha -version in terminal (at project path)
  • Make sure your project has package.json available, if not run npm init -y
  • And finally to run mocha test scripts, on terminal (on project path) run npm test

Upvotes: 2

GraySe7en
GraySe7en

Reputation: 182

i have this error when using "--ui tdd". remove this or using "--ui bdd" fix problem.

Upvotes: 11

weichao
weichao

Reputation: 3381

if you are using vscode, want to debug your files

I used tdd before, it throw ReferenceError: describe is not defined

But, when I use bdd, it works!

waste half day to solve it....

    {
      "type": "node",
      "request": "launch",
      "name": "Mocha Tests",
      "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
      "args": [
        "-u",
        "bdd",// set to bdd, not tdd
        "--timeout",
        "999999",
        "--colors",
        "${workspaceFolder}/test/**/*.js"
      ],
      "internalConsoleOptions": "openOnSessionStart"
},

Upvotes: 223

eighteyes
eighteyes

Reputation: 1314

OP asked about running from node not from mocha. This is a very common use case, see Using Mocha Programatically

This is what injected describe and it into my tests.

mocha.ui('bdd').run(function (failures) {
    process.on('exit', function () {
      process.exit(failures);
    });
  });

I tried tdd like in the docs, but that didn't work, bdd worked though.

Upvotes: 7

subhojit777
subhojit777

Reputation: 596

You can also do like this:

  var mocha = require('mocha')
  var describe = mocha.describe
  var it = mocha.it
  var assert = require('chai').assert

  describe('#indexOf()', function() {
    it('should return -1 when not present', function() {
      assert.equal([1,2,3].indexOf(4), -1)
    })
  })

Reference: http://mochajs.org/#require

Upvotes: 31

cantera
cantera

Reputation: 24985

To run tests with node/npm without installing Mocha globally, you can do this:

• Install Mocha locally to your project (npm install mocha --save-dev)

• Optionally install an assertion library (npm install chai --save-dev)

• In your package.json, add a section for scripts and target the mocha binary

"scripts": {
  "test": "node ./node_modules/mocha/bin/mocha"
}

• Put your spec files in a directory named /test in your root directory

• In your spec files, import the assertion library

var expect = require('chai').expect;

• You don't need to import mocha, run mocha.setup, or call mocha.run()

• Then run the script from your project root:

npm test

Upvotes: 55

mscdex
mscdex

Reputation: 106698

Assuming you are testing via mocha, you have to run your tests using the mocha command instead of the node executable.

So if you haven't already, make sure you do npm install mocha -g. Then just run mocha in your project's root directory.

Upvotes: 247

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