Fake a low MySQL wait_timeout setting and force a exception

fake_wait_timeout.php

public function testCommand() {
		$site = $this->siteRepository->findAll()->getFirst();
		/** @var Connection $connection */
		$connection = $this->entityManager->getConnection();
		$connection->exec('SET SESSION wait_timeout=1;');
		$this->outputLine('Set wait_timeout for mysql session to one second and wait two seconds now');
		sleep(2);
		$domain = new Domain();
		$domain->setSite($site);
		$domain->setHostPattern('katze2.de');
		$this->domainRepository->add($domain);
		$this->persistenceManager->persistAll();
		$this->outputLine('Persistet.');
	}