How to access 'private functions' in a singleton from another object inside it

Question

I am currently trying to create a test suite for my javascript apps. My problem is that, it seems I cannot get access to init() from my utils object, as you can see below:

I have my app that follow a singleton pattern:

var appModal = function () {
    var utils = Object.create(moduleUtils);
     function init(caller, options ) {
    }
}();

My test suite is in moduleUtils, this is a object literal converted to a prototype

moduleUtils.debug = {
    addSlideTest : function(){
        /* this function cannot fire init() from appModal */
}}

See stackoverflow.com/questions/716207/… and stackoverflow.com/questions/1881078/… — Crescent Fresh
– Crescent Fresh, Commented May 10, 2010 at 2:32

SLaks · Accepted Answer · 2010-05-10 02:30:22Z

1

This is not possible.
You need to expose the closured functions in a publicly visible object.

For example, you can make a testMethods object in your unit tests to collect private methods. Your main file would then add private methods to the object if it exists, like this:

//In appModal
if (typeof testMethods === "object")
    testMethods.init = init;

//In test suite
testMethods = { };
...
testMethods.init();

answered May 10, 2010 at 2:30

SLaks

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1 Comment

The Orca Over a year ago

this is not perfect, but it is a lot better than not testing them

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