SharePoint 2013 getting all webs url failing in a given site collection including root web using JSOM

Using JSOM I am trying to get the collection of all the webs(sub-sites) including the root web of a given site collection and apply theme. but the url isn't correct.

Follow code:

function getWebs()
{
   var context = SP.ClientContext.get_current();
   var web = context.get_web(); 
   var site = context.get_site();
   var rootWeb = site.get_rootWeb();
   var subWebs = rootWeb.get_webs();

   context.load(subWebs, 'Include(Url, ServerRelativeUrl,ParentWeb)');
   context.executeQueryAsync(
    function () {  
         subWebs = subWebs.getEnumerator();
         while(subWebs.moveNext()){
            var subWeb = subWebs.get_current();
            var testUrl = subWeb.get_url();
            alert(testUrl);
         }
    },
    function (sender, args) {
       console.log(args.get_message());
    }
   );   
}

Follow image from Project that have debug:

Correct: The expected is : http://ift.tt/1sDw1tO

Incorrect: The result is : http://ift.tt/1J963Je

And not apply theme for all subsite.

note: this method is recursive.

Some idea about how to resolve this question?