Trigger click event on an AngularJS directive in Mocha test suite - angularjs

Question

I have a regular angular app with a directive. This directive contains an element with a ng-click="clickFunction()" call. All works well when I click that element. I now need to write a test for this click, making sure that this function was actually run when the element was clicked - this is what I'm having trouble with.
Here's a jsfiddle to illustrate my issue: http://jsfiddle.net/miphe/v0ged3vb/
The controller contains a function clickFunction() which should be called on click. The unit test should imitate a click on the directive's element and thus trigger the call to that function.
The clickFunction is mocked with sinonjs so that I can check whether it was called or not. That test fails, meaning there was no click.
What am I doing wrong here?
I've seen the answer to similar questions like Testing JavaScript Click Event with Sinon but I do not want to use full jQuery, and I believe I'm mocking (spying on) the correct function.
Here's the js from the fiddle above (for those who prefer to see it here):
angular.js, angular-mocks.js is loaded as well.
// App
var myApp = angular.module('myApp',[]);
myApp.controller('MyCtrl', function($scope) {
$scope.person = 'Mr';
$scope.clickFunction = function() {
// Some important functionality
};
});
myApp.directive('pers', function() {
return {
restrict: 'E',
template: '<h2 ng-click="clickFunction()" ng-model="person">Person</h2>',
};
});
// Test suite
describe('Pers directive', function() {
var $scope, $controller, template = '<pers></pers>', compiled;
beforeEach(module('myApp'));
beforeEach(inject(function($rootScope, $controller, $compile) {
$scope = $rootScope.$new();
ctrl = $controller('MyCtrl', {$scope: $scope});
compiled = $compile(template)($scope);
// Do I need to run a $scope.$apply() here?
console.log($scope.$apply); // This is a function, apparently.
//$scope.$apply(); // But running it breaks this function.
}));
it('should render directive', function() {
el = compiled.find('h2');
expect(el.length).to.equal(1);
});
it('should run clickFunction() when clicked', function() {
el = compiled.find('h2');
sinon.spy($scope, 'clickFunction');
// Here's the problem! How can I trigger a click?
//el.trigger('click');
//el.triggerHandler('click');
expect($scope.clickFunction.calledOnce).to.be.true
});
});
// Run tests
mocha.run();

Answer 1

Turns out the problem was quite hidden.
Firstly the $scope.$digest and $scope.$apply functions broke the beforeEach function which ultimately led to the whole solution.
Solution
Do not mix angular versions.
In the first fiddle
angular.js version 1.3.0
angular-mocks.js version 1.1.5
In the solved fiddle
angular.js version 1.3.0
angular-mocks.js version 1.3.0
That was the whole problem, and gave me quite obscure errors.
Thanks to Foxandxss from the #AngularJS IRC channel on freenode.
The way to trigger events on the directive with jQlite was simply:
someElement.triggerHandler('click');