How can I test events in angular?

If you're just needing some testing on event firing and catching, this is how I do it. For ensuring that a certain event gets fired ($emit-ed or $broadcast-ed), a spy is the way to go. You need a reference to the scope that will be calling the $emit or $broadcast, and then just to do something like this:

spyOn(scope, "$emit")//run code to testexpect(scope.$emit).toHaveBeenCalledWith("MY_EVENT_ID", other, possible, args);

If you don't need or don't want to worry about the arguments that are passed with the $emit, you can put an $on on the $rootScope and set a flag to know the event was emitted. Something like this:

var eventEmitted = false;$rootScope.$on("MY_EVENT_ID", function() {   eventEmitted = true;});//run code to testexpect(eventEmitted).toBe(true);

For testing functionality that runs when an event is caught ($on), it's a little easier. Just get a $rootScope from the inject function and then send the desired event.

$rootScope.$broadcast("EVENT_TO_TEST", other, possible, args);//expects for event here

Now, I imagine this event handling would be happening in a directive or a controller (or both) For setting up directive tests, see https://github.com/vojtajina/ng-directive-testing. For setting up controller tests, see https://github.com/angular/angular-phonecat/blob/master/test/unit/controllersSpec.js#L27

Hope this helps.

Here are the steps you should follow to $broadcast event in angular JS

While inijecting initialize the rootScope and scope stub as given below:

var rootScope;var scopeStub = beforeEach(function() {    inject(function($rootScope, _$controller_) {        rootScope = $rootScope;        scopeStub = $rootScope.$new();        $controller = _$controller_;    });});

After controller is created raise event using rootScope like below:

rootScope.$broadcast('eventName', parameter1);

We used this sintax for A1

=========== Controller ========    var vm = this;    $scope.$on('myEvent', function(event, data){        console.log('event number', data.id);    });============ Test ============= it('should throw myEvent', function() {    var data = {};    $scope.$broadcast('myEvent', {id:1});    $scope.$broadcast('myEvent', {id:2});    $scope.$broadcast('myEvent', {id:3});});============ Output ============Chrome LOG: '--------------------------------------------'Chrome LOG: 'event number', 1Chrome LOG: 'event number', 2Chrome LOG: 'event number', 3