angularjs - Jasmine (via TypeScript) test to verify scope $on is called -

i have search around few places ideas on this.

how unit test $scope.broadcast, $scope.$on using jasmine

$scope.$on not working in jasmine specrunner

it has helped think seems still missing something. trying test controller has $rootscope.$on in code. in unit test trying trigger $broadcast $on gets , code runs. current code not working.

here controller:

constructor($state: ng.ui.istateservice, store: angular.a0.storage.istoreservice, jwthelper: angular.jwt.ijwthelper, $rootscope: any) {     this.currentdate = new date();     this.state = $state;     this.store = store;     this.jwthelper = jwthelper;     this.userfullname = '';      $rootscope.$on('$statechangestart',         (event: any, tostate: any, toparams: any, fromstate: any, fromparams: any, error: any) => {             var jwttoken = this.store.get('token');             if (jwttoken != null) {                 var decodedtoken: = this.jwthelper.decodetoken(jwttoken);                 }          });  } 

here test:

 beforeeach(angular.mock.inject(($compile: ng.icompileservice, $rootscope: any, $controller: any, $state: ng.ui.istateservice, jwthelper: angular.jwt.ijwthelper) => {      controllerscope = $rootscope.$new();     navbarcontroller = $controller('navbarcontroller', { $scope: controllerscope });     currentdate = new date();     rootscope = $rootscope;     state = $state;     jwt = jwthelper; }  it('should broadcast user token', () => {     spyon(controllerscope, '$on');     spyon(jwt, 'decodetoken');     //state.go('home'); trying different way trigger event     rootscope.$broadcast('$statechangestart', [{ tostate: 'home' }]);     expect(controllerscope.$on).tohavebeencalled();     expect(jwt.decodetoken).tohavebeencalled(); }); 

both spies never called. have missed aligned?

instead of testing whether or not event listener fired, you're verifying whether code registers listener fired.

it fired, controllerscope.$on got invoked in beforeeach function, not in it. spyon can't reach past detect prior function calls; if it, that's not test you're trying do.

basically you've done this:

window.addeventlistener('mousemove', somefunctionexpr); spyon(window, 'addeventlistener'); triggermousemoveevent(); expect(window.addeventlistener).tohavebeencalled(); 

i can't speak decodetoken / jwt -- code doesn't reference anywhere don't know expect called.