[Unit Testing] Directive testing, require parent controller

        function getCompiledElement() {

              $scope.chart = {
                additional: "$ 1.56 / per minute",
                text: "phoneCard.voice",
                total: 250,
                unit: "MIN",
                used: 127
            };

            const
                mockParentController = {

                      onClick( target ) {
                          selectedChartType = target;
                      }
                },
                parentElement = angular.element('<div><com-cycle-data-chart chart="chart" service-type="voice"></com-cycle-data-chart></div>');

            // http://stackoverflow.com/a/19951141 option 4)
            parentElement.data('$comCardBigController', mockParentController);

            const compiledDirective = compile(parentElement)($scope).find('com-cycle-data-chart');
            $scope.$digest();
            return compiledDirective;
        }