Ojs\JournalBundle\Entity\Article::setJournal PHP Method

    public function setJournal(Journal $journal)
    {
        $this->journal = $journal;
        $journal->addArticle($this);
        return $this;
    }

 public function testDelete()
 {
     $em = $this->em;
     $journal = $em->getRepository('OjsJournalBundle:Journal')->find('1');
     $entity = new Article();
     $entity->setCurrentLocale($this->locale);
     $entity->setAnonymous(false);
     $entity->setTitle('Article Title Delete');
     $entity->setStatus(1);
     $entity->setJournal($journal);
     $em->persist($entity);
     $em->flush();
     $id = $entity->getId();
     $this->logIn();
     $client = $this->client;
     $token = $this->generateToken('ojs_journal_article' . $id);
     $client->request('DELETE', '/journal/1/article/' . $id . '/delete', array('_token' => $token));
     $this->assertStatusCode(302, $client);
 }