MarkSweepGarbageCollector gc = new MarkSweepGarbageCollector(
new SegmentBlobReferenceRetriever(store.getTracker()),
(GarbageCollectableBlobStore) store.getBlobStore(),
MoreExecutors.sameThreadExecutor(),
"./target", 2048, true, 0);
gc.collectGarbage();
Set<String> existing = iterate();
boolean empty = Sets.intersection(set, existing).isEmpty();
assertTrue(empty);
}