angular + jasmine + mock $stateParams in a directive

What is the best approach to mock $stateParams in a directive? $stateParam members will be changed according to the test.

I can easily mock $stateParams in a controller using $controller('ctrl', $stateParams) but dont know how to modify $stateParams that gets injected into the directive.

I've gone the route of decorating $stateParams with the below but can only declare that when i create the module. as i mentioned, $stateParam members will change many times through the different tests.

beforeEach(angular.mock.module(function ($provide) {

    $provide.provider('$stateParams', function () {
        return {
            myStateParam: true,
            myOtherStateParam: 'some text'
        };
    });

}));