jasimine argument scope is required when instantiating a controller - angularjs

Question

I am working to initiate a controller sits inside a directive. I have some tests I need to run but right now I am not able to access the controller with ng-Mock.
describe('hero Directive', function () {
var $compile,
$rootScope,
$scope,
element,
ctrl;
beforeEach(function () {
angular.mock.module('ha.module.core');
angular.mock.inject(function (_$compile_, _$rootScope_, _$controller_, $templateCache) {
$compile = _$compile_;
element = angular.element("<div exlore-hereo></div");
$compile(element)($rootScope);
$rootScope = _$rootScope_;
$scope = $rootScope.$new();
ctrl = _$controller_('ExploreHeroController', { $scope: $scope });
console.log(ctrl)
$scope.$digest();
});
});
afterEach(function () {
// need to remove the element element.remove();
});
describe('directive controller', function () {
it('should dispatch call $emit with $methodsBound', function () {
//spyOn($scope, '$emit');
spyOn($scope, 'ControllerName');
//expect(scope.$emit).toHaveBeenCalledWith('$methodsBound');
//expect(ctrl).toHaveBeenCalled();
});
});
});
I created an element compiled it and called the $digest method.
The error that I got was
Argument 'scope' is required.
So I tried spying on the it with jasmine
spyON($scope, 'ControllerName');
My controller inside of my directive is pretty basic.
var ControllerName = function($scope) {
$scope.$emit('$method');
}
It seems like I need a spy, but I am not sure why the one I created does not work.

Answer 1

You can try to spy on $scope, but note that ControllerName is not a member of the $scope object.
However, $emit is....
The thing is, that you call $emit in the controllers constructos, therefore you have to spy on it before:
beforeEach(function () {
...
$scope = $rootScope.$new();
spyOn($scope, '$emit');
ctrl = _$controller_('ExploreHeroController', { $scope: $scope });
...
});
describe('directive controller', function () {
it('should dispatch call $emit with $methodsBound', function () {
expect($scope.$emit).toHaveBeenCalledWith('$methodsBound');
});
});