@Override
  CompactionDetails getCompactionDetails(CompactionPolicy compactionPolicy) throws StoreException {
    return compactionPolicy.getCompactionDetails(capacityInBytes, usedCapacity, segmentCapacity, segmentHeaderSize,
        logSegmentsNotInJournal, mockBlobStoreStats, "/tmp/" + mockBlobStoreStats.getStoreId() + "/");
  }
MockBlobStore to assist in testing {@link CompactionManager}
ambry-store/src/test/java/com/github/ambry/store/CompactionPolicyTest.java