public function testSet()
 {
     $data = [['productId' => 42, 'qty' => 100]];
     $this->session->expects($this->once())->method('set')->with(ProductDataStorage::PRODUCT_DATA_KEY, serialize($data));
     $this->storage->set($data);
 }
 /**
  * {@inheritdoc}
  */
 public function process(array $data, Request $request)
 {
     $this->storage->set($data);
     return empty($this->redirectRouteName) ? null : new RedirectResponse($this->getUrl($this->redirectRouteName));
 }