Node node = getNode(hz);
LockServiceImpl lockService = node.nodeEngine.getService(LockServiceImpl.SERVICE_NAME);
Partition partition = instances[0].getPartitionService().getPartition(partitionKey);
LockStore lockStore = lockService.getLockStore(partition.getPartitionId(), new InternalLockNamespace(lock.getName()));
assertTrue(lockStore.isLocked(node.getSerializationService().toData(lock.getName())));
}