README.md

The file I want to test is set up as an IIFE, which works great in the browser. I'm able to use the method renderInteractions like so:

var something = utils.renderInteractions(doc);

However, when I run the test suite I get the following error:

TypeError: Object #<Object> has no method 'renderInteraction'

I found this Stack Overflow post which seems to indicate that your JavaScript file HAS to export something that Mocha can tap into: http://stackoverflow.com/questions/10204021/how-do-i-test-normal-non-node-specific-javascript-functions-with-mocha

But I'm not sure how to accomplish that.

application.utils.js

// if the module has no dependencies, the above pattern can be simplified to
(function (root, factory) {
    if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        define(factory);
    } else if (typeof exports === 'object') {
        // Node. Does not work with strict CommonJS, but
        // only CommonJS-like enviroments that support module.exports,
        // like Node.
        module.exports = factory();
    } else {
        // Browser globals (root is window)
        root.utils = factory();
  }
}(this, function () {
    var publicMethods = {};

    publicMethods.renderInteraction = function(doc) {
        var interaction = {
            id: doc._id,
            account: doc.stream
        };

        if (doc.type === "tweet" && doc.data.retweeted_status && typeof doc.data.retweeted_status === "object") {

            // Retweet
            $.extend(interaction, {
                "native_id": doc.data.id_str,
                "user_id": doc.data.user.id_str,
                "name": doc.data.user.name,
                "screen_name": doc.data.user.screen_name
            });

        }

        return interaction;
    };

    return publicMethods;

    // Just return a value to define the module export.
    // This example returns an object, but the module
    // can return a function as the exported value.
    return publicMethods;
}));

test.application.utils.js

var assert = require("assert"),
    utils = require("../src/emmasocial/assets/js/es/src/application.utils");

describe('Interactions', function() {

    describe('render retweet', function() {

        it('should not emit anything when doc is empty', function(done) {

            var document = {},
                rendered = utils.renderInteraction(document);

            assert.equal(1, 1);
            done();

        });

    });

});