Inheritance: implements Ojs\CoreBundle\Entity\ThemeInterface, use trait Ojs\CoreBundle\Entity\GenericEntityTrait
 public function testDelete()
 {
     $em = $this->em;
     $adminJournalTheme = new AdminJournalTheme();
     $adminJournalTheme->setTitle('Journal Theme Delete Title - phpunit');
     $adminJournalTheme->setCss('css');
     $adminJournalTheme->setPublic(true);
     $em->persist($adminJournalTheme);
     $em->flush();
     $id = $adminJournalTheme->getId();
     $this->logIn();
     $client = $this->client;
     $token = $this->generateToken('ojs_admin_journal_theme' . $id);
     $client->request('DELETE', '/admin/journal-theme/' . $id . '/delete', array('_token' => $token));
     $this->assertStatusCode(302, $client);
 }