Token token = getDelegationToken();
RenewDelegationTokenRequestPBImpl original = new RenewDelegationTokenRequestPBImpl();
original.setDelegationToken(token);
RenewDelegationTokenRequestProto protoType = original.getProto();
RenewDelegationTokenRequestPBImpl copy = new RenewDelegationTokenRequestPBImpl(protoType);
assertNotNull(copy.getDelegationToken());
//compare source and converted
assertEquals(token, copy.getDelegationToken());