Gc\Media\File::load PHP Method

    public function load(PropertyModel $property, DocumentModel $document, $filename = null)
    {
        $this->setProperty($property);
        $this->setDocument($document);
        $this->setFileName($filename);
    }

 /**
  * Initiliaze files
  *
  * @return void
  */
 protected function initializeFiles()
 {
     $_FILES = array('test' => array('name' => __DIR__ . '/_files/test.jpg', 'type' => 'plain/text', 'size' => 8, 'tmp_name' => __DIR__ . '/_files/test.jpg', 'error' => 0));
     $property = PropertyModel::fromArray(array('id' => 'test-upload'));
     $document = DocumentModel::fromArray(array('id' => 'test-upload'));
     $this->object->load($property, $document, 'test');
 }