Devise\Support\Sortable\Manager::setIsMulti PHP Method

    public function setIsMulti($isMulti)
    {
        return $this->Session->put($this->key . '_multisort', $isMulti);
    }

 public function test_it_sets_is_multi()
 {
     $Framework = new \Devise\Support\Framework();
     $Framework->Session = m::mock('Mock\\Session');
     $Framework->Session->shouldReceive('put')->times(1);
     $Manager = new Manager($Framework);
     $Manager->setIsMulti(true);
 }