angularjs - How to mock the Yes/No decision for ngDialogue with Jasmine Karma -

i new unit testing. have 1 angular service uses ngdialouge - has 2 radio buttons yes/no.

 angular.module('jasminkarmapoc1app')         .factory('fatelayingservice', fatelayingservice);   .....   var response = {}    response.avoidpayment = function (playerdetails){      ....          var prom = ngdialog.open(                         {                             template: 'scripts/decisionbox/fate-decision-  modal-window.html',                             controller: 'decisionboxcontroller'                         }                 );                 prom.closepromise.then(function (res) {                     if (res.value === "1")                     {                       //***below 1 want test -i.e. alert , updation of scope ****                       //alert message , update related scope variables login                      }                     if (res.value === "2")                     { //**below 1 want test -i.e. alert , updation of scope                       //alert message , update related scope variables login                      }    .....   return response() 

now want unit test messages , test whether scope.msg got updated depending on dialogue box selection (yes gives different msg , no gives different msg). if want test messages need mock ngdialog , choices (yes/no), confused between how exactly. appreciated.

i'm not sure if want use open or openconfirm. here's open

ngdialog = jasmine.createspyobj('ngdialog', ['open']);  ngdialog.open.and.returnvalue({  	closepromise : {  		then : function(callback) {  			callback({value: 1});  		}  	}  });      /* test res.value = 1*/  response.avoidpayment();