How to handle click event in angular1 directive test cases

I am trying to write test case for my directive in anguarjs1.x

here is my directive

 .directive("weeklyDirective", function($timeout) {
        return {
            scope: {
                data: '=',
            },
            link: function(scope, element) {
                scope.weekDays = [
                    { text: 'Sun', id: 1 },
                    { text: 'Mon', id: 2 },
                    { text: 'Tue', id: 3 },
                    { text: 'Wed', id: 4 },
                    { text: 'Thu', id: 5 },
                    { text: 'Fri', id: 6 },
                    { text: 'Sat', id: 7 }
                ];
            },
            restrict: 'A',
            templateUrl: "/flat-ui/tpls/weekly-scheduler.html",
        };
    })

where is my directive template

<ul style="padding: 0px;display: inline;margin: 0;list-style: none;">
    <li ng-repeat="weekDay in weekDays" style="padding: 10px;display: inline;">
        <input type="checkbox" value="" check-list="data.weeklyDetails" id="chk_" class="ee-check"> <label class="ee-check" for="chk_"><span></span> </label>
    </li>
</ul>

In my weekly directive, I have used another directive which handles my checkbox list

.directive('checkList', function() {
        return {
            scope: {
                list: '=checkList',
                value: '@'
            },
            link: function(scope, elem, attrs) {
                var handler = function(setup) {
                    var checked = elem.prop('checked');
                    var index = scope.list.indexOf(scope.value);
                    if (checked && index == -1) {
                        if (setup) elem.prop('checked', false);
                        else scope.list.push(scope.value);
                    } else if (!checked && index != -1) {
                        if (setup) elem.prop('checked', true);
                        else scope.list.splice(index, 1);
                    }
                };

                var setupHandler = handler.bind(null, true);
                var changeHandler = handler.bind(null, false);

                elem.bind('change', function() {
                    scope.$apply(changeHandler);
                });
                scope.$watch('list', setupHandler, true);
            }
        };
    });

now I am trying to write test cases to test my directive

describe("weeklyDirective directive", function() {
    var elm, scope, httpBackend, controller;
    beforeEach(module('guideApp.directives'));
    beforeEach(module('/flat-ui/tpls/weekly-scheduler.html'));
    beforeEach(angular.mock.inject(function($rootScope, $compile) {
        compile = $compile;
        scope = $rootScope;
        elm = angular.element('<div weekly-directive data="data"></div>');
        compile(elm)(scope);
        scope.data = {
            interval: 1,
            weeklyDetails: ['1'],
        }
        scope.$digest();
    }));
    it("click on check box it should get added in weeklyDetails", function() {
        var e = elm.find('input[id="chk_3"]');
        console.log(e);
        e.trigger('click');
        scope.$apply();
        var isolateScope = elm.isolateScope();
        expect(isolateScope.data.weeklyDetails.indexOf('4') > -1).toBeTruthy();
    });
});

where I am trying to test that when user click on check box its value should get added to my array weeklyDetails which in data object (passed to the weeklydirective).

its not working as exptected for me please help me to get this working. Thanks in Adv.