@Test
  public void testGetSSIReturnsEmptyMapForNullCheckpoint() {
    BlobStoreUtil blobStoreUtil =
        new BlobStoreUtil(mock(BlobStoreManager.class), MoreExecutors.newDirectExecutorService(), blobStoreConfig, null, null);
    Map<String, Pair<String, SnapshotIndex>> snapshotIndexes =
        blobStoreUtil.getStoreSnapshotIndexes("testJobName", "testJobId", "taskName",
            null, new HashSet<>(), false);
    assertTrue(snapshotIndexes.isEmpty());
  }
Tests related to {@link BlobStoreUtil#getStoreSnapshotIndexes}
samza-core/src/test/java/org/apache/samza/storage/blobstore/util/TestBlobStoreUtil.java