ReferenceError: describe is not defined NodeJs

问题:

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?

回答1:

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.

回答2:

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

npm install mocha --save-dev)

npm install chai --save-dev)

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

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

/test in your root directory

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

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

npm test 

回答3:

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

回答4:

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.

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