public function testRenameLabel()
 {
     $q = 'MATCH (n) OPTIONAL MATCH (n)-[r]-() DELETE r,n';
     $this->client->sendCypherQuery($q);
     $q = 'CREATE (n:OldLabel)';
     $this->client->sendCypherQuery($q);
     $response = $this->client->getLabels();
     $labels = $response->getBody();
     $this->assertContains('OldLabel', $labels);
     $this->client->renameLabel('OldLabel', 'NewLabel');
     $labels = $this->client->getLabels()->getBody();
     $this->assertContains('NewLabel', $labels);
 }