@Test(timeout = 60000)
public void testLookup() throws Exception {

  HdfsFileStatus status = nn.getRpcServer().getFileInfo(testdir);
  long dirId = status.getFileId();
  FileHandle handle = new FileHandle(dirId);
  LOOKUP3Request lookupReq = new LOOKUP3Request(handle, "bar");
  XDR xdr_req = new XDR();
  lookupReq.serialize(xdr_req);
  // Attempt by an unpriviledged user should fail.
  LOOKUP3Response response1 = nfsd.lookup(xdr_req.asReadOnlyWrap(),
      securityHandlerUnpriviledged,
      new InetSocketAddress("localhost", 1234));
  assertEquals("Incorrect return code", Nfs3Status.NFS3ERR_ACCES,
      response1.getStatus());
  // Attempt by a priviledged user should pass.
  LOOKUP3Response response2 = nfsd.lookup(xdr_req.asReadOnlyWrap(),
      securityHandler, new InetSocketAddress("localhost", 1234));
  assertEquals("Incorrect return code", Nfs3Status.NFS3_OK,
      response2.getStatus());
}