public function testDuration()
{
$this->specify("", function () {
expect("property `duration` should be `1209600` by default", $this->model->getDuration())->same(1209600);
$this->model->setDuration(123);
expect('property `duration` should be setting/getting by method', $this->model->getDuration())->same(123);
$this->model->duration = 123;
expect('property `duration` should be setting/getting by property', $this->model->duration)->same(123);
});
}
