can i set caret position in textarea?

[ZhiXuan Guan]

I am trying to implement '@ Users Feature' with angularjs, I almost finish the feature except writing an unit test. I have a Caret module which can help me get/set the caret position in textarea.

I think the most important thing is to get/set the caret position but I dont know how to do it in jasmine.

Mydirective

    .directive('atUser', function (Caret) {

        return {

            restrict: 'A',

            link: function (scope, element) {

                element.bind('focus click keydown', function () {

                    scope.caretPos = Caret.getPos(element);

                });

                scope.$watch(function () {

                    return scope.caretPos;

                }, function (nowCaretPos) {

                    /* do something here */

                })

            }

        }

    })

Html

    <textarea ng-model="message" at-user></textarea>

Jasmine

    

    describe('test at user', function () {

        /* some init code */

        it('should get caret postion', function () {

            textarea = element.find('textarea');

            textarea.triggerHandler('focus');

            except(textarea.scope().caretPos).toEqual(0);

            /*

             * then i want to simulate keydown event and type something

             * and get the caret postion

             * but i dont know how to do it

             * /

        })

    })

Can anyone help me?

thanks a lot!