public function eventListenersAreProperlyExecuted()
{
$this->removeExampleEntities();
$this->insertExampleEntity();
$this->persistenceManager->persistAll();
$eventSubscriber = $this->objectManager->get(Fixtures\EventListener::class);
$this->assertTrue($eventSubscriber->preFlushCalled, 'Assert that preFlush event was triggered.');
$this->assertTrue($eventSubscriber->onFlushCalled, 'Assert that onFlush event was triggered.');
$this->assertTrue($eventSubscriber->postFlushCalled, 'Assert that postFlush event was triggered.');
}