@Test
public void testConvertBlockToken() {

  Token<BlockTokenIdentifier> token = new Token<BlockTokenIdentifier>(
      "identifier".getBytes(), "password".getBytes(), new Text("kind"),
      new Text("service"));
  TokenProto tokenProto = PBHelper.convert(token);
  Token<BlockTokenIdentifier> token2 = PBHelper.convert(tokenProto);
  compare(token, token2);
}