VufsServiceImpl implements IVufsService { @Override public Set<String> getAllocationByBlockUuid(String blockUuid) throws BlockNotExistInMetatableException { for (Metafile metafile : currentMetatable.getMetafileSet()) { if (metafile.getBlockUuidList().contains(blockUuid)) { return metafile.getBlockAllocation(blockUuid); } } throw new BlockNotExistInMetatableException(MessageFormat.format( "Block with uuid: {0}, does not exist in currentMetatable with uuid: {1}, with type: {2}", blockUuid, currentMetatable.getUuid(), currentMetatable.getType())); } @Autowired  VufsServiceImpl(IProfile profile,
            MetatableTransformer metatableTransformer,
            IMetatableService persistingService); @Override Metafile createEmptyMetafile(); @Override Metafile getMetafileByUuid(String fileUuid); @Override Metafile addBlockByUuidToMetafile(String blockUuid, Metafile metafile); @Override Metafile removeBlockByUuidFromMetafile(String blockUuid, Metafile metafile); @Override boolean addMetafileToMetatable(Metafile metafile); @Override boolean removeMetafileFromMetatable(Metafile metafile); @Override Set<String> getAllocationByBlockUuid(String blockUuid); @Override void setAllocationForBlockByUuid(String blockUuid, Set<String> allocationSet); @Override boolean addMetafileAsChildToParent(Metafile childMetafile,
            String parentMetafileUuid); @Override boolean removeMetafileFromParent(String childMetafileUuid,
            String parentMetafileUuid); @Override AllocationStrategy getAllocationStrategyByMetafileUuid(String metafileUuid); @Override void setAllocationStrategyByMetafileUuid(String metafileUuid,
            AllocationStrategy allocationStrategy); @PreDestroy void persistChanges();  }
@Test public void getAllocationByBlockUuid() throws BlockNotExistInMetatableException { Metafile newMetafile = vufsService.createEmptyMetafile(); newMetafile.setAllocationStrategy(AllocationStrategy.HA); vufsService.addMetafileToMetatable(newMetafile); String newBlockUuid = UUID.randomUUID().toString(); vufsService.addBlockByUuidToMetafile(newBlockUuid, newMetafile); Set<String> allocationSet = vufsService.getAllocationByBlockUuid(newBlockUuid); assertNotNull(allocationSet); assertTrue(allocationSet.isEmpty()); }