Angular: how to launch scope function given as directive attribute in directives controller?

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AngularJs

Hey,

I have directive (with own controller) within other controler like this:

<div id="Test-content" ng-controller="testCtrl">
    <oa-modal-dialog dialog-title="This is example dialog" dialog-state="true" dialog-on-open="" dialog-on-close="test.close()" dialog-type="warning" dialog-size="small" dialog-top-toolbar="" dialog-bottom-toolbar=""></oa-modal-dialog>
</div>

Test controller:

.controller('testCtrl', ['$scope', function ($scope) {

    $scope.test = {
        close: function() {
            console.log('test');
        }
    };

}])

Modal dialog directive:

.directive('oaModalDialog', function () {
    return {
        restrict: 'E',
        transclude: true,
        link: function(scope, element, attrs) {
            attrs.$observe('dialogState', function (value) {
                scope.dialogState = value;
            });
        },
        templateUrl: 'oaModalDialogs.html',
        controller: 'modalDialogsCtrl'
    }
});

Question how can I retrieve and fire function which is in directives attribute 'dialog-on-close' in directives controller 'modalDialogs'? Presume that any function can be included into attribute so I can't use fixed function ($scope.test.close() in the controller)

I tried something like this:

.controller('modalDialogsCtrl', ['$scope', '$element', '$attrs', function ($scope, $element, $attrs) {
$attrs['dialogOnClose']();
}]);

Throws error... Any suggestions?