Trigger resizable in jasmine

Question

I make some unit test in my angular project with karma and jasmine.

In a directive I have a resizable jquery-ui function on an element :

element.find(".wt-tools-content").resizable({
                resize: function (event, ui) {
                   my_action
                }
            });

And I can't trigger it in my test with jasmine, I try :

element.find(".wt-tools-content").trigger('resizable');
element.find(".wt-tools-content").resizable().trigger('resize');

And so many combination but I can't find how I can't trigger and test the code inside the resize function. I'm sure element in the directive and element in the jasmine test file is the same ;)

Someone can help me ?

Thank you ;)