PartKeepr\StockBundle\Entity\StockEntry::setPart PHP Méthode

    public function setPart(Part $part = null)
    {
        $this->part = $part;
    }

 public function testStockHistory()
 {
     $client = static::makeClient(true);
     /**
      * @var $part1 Part
      */
     $part1 = $this->fixtures->getReference("part.1");
     $stockLevel = new StockEntry();
     $stockLevel->setPart($part1);
     $stockLevel->setStockLevel(5);
     $fosUser = $this->fixtures->getReference("user.admin");
     $userService = $this->getContainer()->get("partkeepr.userservice");
     $user = $userService->getProxyUser($fosUser->getUsername(), $userService->getBuiltinProvider(), true);
     $stockLevel->setUser($user);
     $part1->addStockLevel($stockLevel);
     $this->getContainer()->get("doctrine.orm.default_entity_manager")->flush();
     $iriCoverter = $this->getContainer()->get("api.iri_converter");
     $iri = $iriCoverter->getIriFromItem($part1);
     $client->request("GET", $iri);
     $response = $client->getResponse()->getContent();
     $responseObj = json_decode($response, true);
     $responseObj["stockLevels"] = array();
     $client->request("PUT", $iri, array(), array(), array(), json_encode($responseObj));
     $this->assertEquals(200, $client->getResponse()->getStatusCode());
     $this->getContainer()->get("doctrine.orm.default_entity_manager")->refresh($part1);
     $this->assertEquals(1, count($part1->getStockLevels()));
 }