FutureDigest futureDigest = p1.digest(lKey).returnMetaValues().start();
futureDigest.awaitUninterruptibly();
Assert.assertTrue(futureDigest.isSuccess());
Data dataMeta = futureDigest.digest().dataMap().values().iterator().next();
Assert.assertEquals(keyPair1.getPublic(), dataMeta.publicKey());
Assert.assertEquals(data.signature(), dataMeta.signature());
Assert.assertEquals(0, dataMeta.length());
} finally {
p1.shutdown().awaitUninterruptibly();
p2.shutdown().awaitUninterruptibly();