### Question:
ReconContainerDBProvider implements Provider<DBStore> { @Override public DBStore get() { DBStore dbStore; File reconDbDir = reconUtils.getReconDbDir(configuration, OZONE_RECON_DB_DIR); File lastKnownContainerKeyDb = reconUtils.getLastKnownDB(reconDbDir, RECON_CONTAINER_KEY_DB); if (lastKnownContainerKeyDb != null) { LOG.info("Last known container-key DB : {}", lastKnownContainerKeyDb.getAbsolutePath()); dbStore = initializeDBStore(configuration, lastKnownContainerKeyDb.getName()); } else { dbStore = getNewDBStore(configuration); } if (dbStore == null) { throw new ProvisionException("Unable to provide instance of DBStore " + "store."); } return dbStore; } @Inject  ReconContainerDBProvider(OzoneConfiguration configuration,
                                  ReconUtils reconUtils); @Override DBStore get();  }### Answer:
@Test public void testGet() throws Exception { ReconContainerDBProvider reconContainerDBProvider = injector.getInstance( ReconContainerDBProvider.class); DBStore dbStore = reconContainerDBProvider.get(); assertNotNull(dbStore); }