Testing in node.js with mocha - Newbie

Question

I have started implementing TDD in my JS project. I've implemented mocha for that purpose. As these are my first steps what I did:

Installed node.js
Installed mocha globally and locally to my project.
Wrote package.json setting dependencies.
Wrote makefile.
Wrote .gitignore to avoid uploading node_modules folder.

Folder structure

project

-- js ----filetotest.js

-- test ---- test.js

What I want to do is to run the command make test in order to run the tests inside test.js that tests the filetotest.js file. I read about the node.js approach using exports. But is there some way to include the file in the test suite?

I'm stuck here, and I think that my doubt is more about the concept than the tech thing. Will appreciate a lot your help.

To clarify a little bit what I would like to do: https://nicolas.perriault.net/code/2013/testing-frontend-javascript-code-using-mocha-chai-and-sinon/

I would like to get a similar result through the command line.

Thanks so much,

Guillermo

Andrei Karpuszonak · Accepted Answer · 2013-11-27 14:59:32Z

1

You are doing it right.

Now export your function from filetotest.js, like this:

var f1 = function(params) {
  // ...
}

exports.f1 = f1

In test.js, require this file

var f1 = require("./filetotest.js").f1

// test f1

Btw, if you will put your tests in /test directory, mocha will execute them automatically (given that it will be executed from the root of your project)

answered Nov 27, 2013 at 14:59

Andrei Karpuszonak

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2 Comments

Guillermo Over a year ago

Thanks so much! So there is no way to prevent adding the exports... in the original file to test through the command line right?

Andrei Karpuszonak Over a year ago

implementation itself is hidden, so you have encapsulation. the only exposed part is your function name and parameters, which could be used by another files/modules. using TDD you shall ensure that for given input function provides needed output

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