public function testGetIdentifierValue()
 {
     $localisation = $this->genericEntityManager->getEntity('recolnat', 'localisation', 15248883);
     $this->integer($this->genericEntityManager->getIdentifierValue($localisation))->isEqualTo(15248883);
     $this->exception(function ($localisation) {
         $this->genericEntityManager->getIdentifierValue($localisation);
     })->isInstanceOf('Exception');
 }