public function testHandlePostFlushEmptyThread()
 {
     $email = $this->getEmailEntity();
     $this->manager->addEmailToQueue($email);
     $this->emailActivityListProvider->method('getTargetEntities')->will($this->returnValue([]));
     $this->manager->handlePostFlush(new PostFlushEventArgs($this->entityManager));
     $this->assertCount(0, $this->manager->getQueue());
 }