angularjs mocking element for directive to add features

I use angular js 1.0.3 and I try to test my directive.

we use jQuery that is loaded automatically by angular and is accessible as angular.element that is passed to directive.

how can I add properties to the element before directive is linked with scope???

var def = '<input data-my-directive="" />';

var scope = $rootScope.$new();
var linked = $compile(def);
// do something to add property something that jq is adding
var directive = linked(scope);

my directive is something like

return function(scope, element, attrs) {
    element.jq-plugin-method();
}

and my target is element passed to directive after linkage.

thanks for help