ios - settings values of viewDidLoad from XCTest -

i writing unit test cases project of mine , having many issues first time writing test cases. app typical login , navigationcontroller based application. writing test case viewcontroller setting values in viewdidload. these values fetched nsuserdefaults , previous viewcontroller. have created object of viewcontroller in setup() method of xunit following:

let storyboard: uistoryboard = uistoryboard(name: "main", bundle: nsbundle(forclass: self.dynamictype))     viewcontroller = storyboard.instantiateviewcontrollerwithidentifier("alertdetailsviewcontroller") as! alertdetailsviewcontroller 

now when run setup there crash there no object should have received class before loading. there way can set values viewcontroller before loading of viewdidload()? how should test nsuserdefaults. need save/retrieve values nsuserdefault. there way mock it?

regards
pankaj

i know late reply..but new viewers...

var alertdetailviewcontroller: uiviewcontroller? weak var alertdetailviewcontrollerobj: alertdetailsviewcontroller?  override func setup() {     super.setup()     // put setup code here. method called before invocation of each test method in class.      alertdetailviewcontroller = uistoryboard(name: "alertdetailsviewcontroller", bundle: nil).instantiateviewcontroller(withidentifier: "alertdetailsviewcontroller")      ashtestresultviewcontrollerobj = alertdetailviewcontroller as? alertdetailsviewcontroller 

}

    xctassertnotnil(alertdetailviewcontroller?.viewdidload()) 

viewdidload of alertdetailviewcontroller start executed.you can put break points , debug viewdidload method. if objects not initialized in viewcontroller'viewdidload method, can expect crash.there no way can handle this.