@Test
  public void singleBlobThroughManagerTest() throws Exception {
    for (String blobId : blobIds) {
      executeOpAndVerify(Collections.singleton(blobId), RouterErrorCode.BlobNotDeleted);
      deleteBlobInAllServer(blobId);
      executeOpAndVerify(Collections.singleton(blobId), null);
      executeOpAndVerify(Collections.singleton(blobId), null);
    }
  }
Tests single blob id through undelete manager and server returns no error.
@throws Exception
ambry-router/src/test/java/com/github/ambry/router/UndeleteManagerTest.java