content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.    
   */
  
  package org.apache.bifromq.basekv.localengine.rocksdb;
  
  import static org.awaitility.Awaitility.await;
  
  import org.apache.bifromq.basekv.localengine.metrics.KVSpaceOpMeters;
  import io.micrometer.core.instrument.Tags;
  import org.mockito.Mockito;
  import org.rocksdb.Snapshot;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.testng.annotations.Test;
  
  public class KVSpaceSnapshotTest extends AbstractRawRocksDBTest {
      @Test
      public void gc() {
          Snapshot snapshot = db.getSnapshot();
          Logger logger = LoggerFactory.getLogger("testLogger");
          RocksDBKVSpaceSnapshot spaceSnapshot =
              new RocksDBKVSpaceSnapshot("testSpace", snapshot, cfHandle, db,
                  new KVSpaceOpMeters("testSpace", Tags.of("tag", "value")), logger);
          spaceSnapshot = null;
          await().forever().until(() -> {
              System.gc();
              try {
                  Mockito.verify(db, Mockito.times(1)).releaseSnapshot(snapshot);
                  return true;
              } catch (Throwable e) {
                  return false;
              }
          });
      }
  }
  