PartKeepr\PartBundle\Entity\PartDistributor::setDistributor PHP Méthode

    public function setDistributor(Distributor $distributor)
    {
        $this->distributor = $distributor;
    }

 public function testAssociationRemoval()
 {
     $part = new Part();
     $part->setName("TEST");
     $part->setCategory($this->getContainer()->get("partkeepr.part.category_service")->getRootNode());
     $part->setStorageLocation($this->fixtures->getReference("storagelocation.first"));
     $partManufacturer = new PartManufacturer();
     $partManufacturer->setManufacturer($this->fixtures->getReference("manufacturer.first"));
     $part->addManufacturer($partManufacturer);
     $partDistributor = new PartDistributor();
     $partDistributor->setDistributor($this->fixtures->getReference("distributor.first"));
     $part->addDistributor($partDistributor);
     $partAttachment = new PartAttachment();
     $fileService = $this->getContainer()->get("partkeepr_uploadedfile_service");
     $fileService->replaceFromData($partAttachment, "BLA", "test.txt");
     $part->addAttachment($partAttachment);
     $this->getContainer()->get("doctrine.orm.default_entity_manager")->persist($part);
     $this->getContainer()->get("doctrine.orm.default_entity_manager")->flush($part);
     $part->removeDistributor($partDistributor);
     $part->removeManufacturer($partManufacturer);
     $part->removeAttachment($partAttachment);
     $this->getContainer()->get("doctrine.orm.default_entity_manager")->flush($part);
     $storage = $fileService->getStorage($partAttachment);
     $this->assertNull($partDistributor->getId());
     $this->assertNull($partDistributor->getId());
     $this->assertNull($partAttachment->getId());
     $this->assertFalse($storage->has($partAttachment->getFullFilename()));
 }