Ionic refresh $http

I’m stuck here and i really need help.

I’m using many separated factories and controllers because i need them separated but, how can i invoke controller from ionic-refresh directive.
Example, i have this factory:

.factory('dataTest', function($http){
   return {
get: function(){
  return $http.get('http://get')
    .then(
      function(result){
        return result.data;
      }
    );
}
}
});

and controller:

 .controller('testCtrl',['$scope', 'dataTest',
   function ($scope, currentSea){
   dataTest.get().then(function(data){
           ...
   }

Now how can i refresh data with ionic? Which by the way shoud refresh other 3 diffrenet controllers.

Thanks in advance.