Building JavaScript Native Modules iOS

Hi, for a special http REST API I try to build a module. This is my test code:

var Module = function() {
    return this;
};
Module.prototype = {
    getProperty : function() {
    }
};
module.exports = Module;

This JS file is living in iphone/assets folder and is named like the appid (de.appwerft.testjsmodule.js). Now I can compile with python build.py, unzip and copy into folder. In tiapp.xml is:

<module platform="iphone">de.appwerft.testjsmodule</module>

After compiling:

var myObj = new (require('de.appwerft.testjsmodule'))();
myObj.getProperty();

After starting on console log:

[INFO] :   [object DeAppwerftTestjsmoduleModule] loaded
[ERROR] :  Script Error {
[ERROR] :      backtrace = "#0 () at :0";
[ERROR] :      line = 9;
[ERROR] :      message = "'' is not a constructor (evaluating 'new (require('de.appwerft.testjsmodule'))()')";
[ERROR] :      name = TypeError;
[ERROR] :      sourceId = 315865504;
[ERROR] :      sourceURL = "file:///Us____/app.js";
[ERROR] :  }

Any ideas whats going wrong? If I embed my mini module in classical form (referencing to js file in Resources folder) it works as aspected.