BigtableTableAdminClientWrapper implements IBigtableTableAdminClient { @Override public ApiFuture<Void> deleteSnapshotAsync(DeleteSnapshotRequest request) { return ApiFutureUtil.transformAndAdapt( delegate.deleteSnapshotAsync(request), new Function<Empty, Void>() { @Override public Void apply(Empty input) { return null; } }); } BigtableTableAdminClientWrapper(
      @Nonnull BigtableTableAdminClient adminClient, @Nonnull BigtableOptions options); @Override Table createTable(CreateTableRequest request); @Override ApiFuture<Table> createTableAsync(CreateTableRequest request); @Override Table getTable(String tableId); @Override ApiFuture<Table> getTableAsync(String tableId); @Override List<String> listTables(); @Override ApiFuture<List<String>> listTablesAsync(); @Override void deleteTable(String tableId); @Override ApiFuture<Void> deleteTableAsync(String tableId); @Override Table modifyFamilies(ModifyColumnFamiliesRequest request); @Override ApiFuture<Table> modifyFamiliesAsync(ModifyColumnFamiliesRequest request); @Override void dropRowRange(String tableId, String rowKeyPrefix); @Override void dropRowRange(String tableId, ByteString rowKeyPrefix); @Override ApiFuture<Void> dropRowRangeAsync(String tableId, String rowKeyPrefix); @Override ApiFuture<Void> dropRowRangeAsync(String tableId, ByteString rowKeyPrefix); @Override void dropAllRows(String tableId); @Override ApiFuture<Void> dropAllRowsAsync(String tableId); @Override ApiFuture<Operation> snapshotTableAsync(SnapshotTableRequest request); @Override ApiFuture<Snapshot> getSnapshotAsync(GetSnapshotRequest request); @Override ApiFuture<ListSnapshotsResponse> listSnapshotsAsync(ListSnapshotsRequest request); @Override ApiFuture<Void> deleteSnapshotAsync(DeleteSnapshotRequest request); @Override ApiFuture<Operation> createTableFromSnapshotAsync(CreateTableFromSnapshotRequest request);  }
@Test public void testDeleteSnapshotAsync() { DeleteSnapshotRequest request = DeleteSnapshotRequest.newBuilder().setName(TABLE_NAME).build(); when(mockAdminClient.deleteSnapshotAsync(request)) .thenReturn(Futures.immediateFuture(Empty.getDefaultInstance())); clientWrapper.deleteSnapshotAsync(request); verify(mockAdminClient).deleteSnapshotAsync(request); }