security: clean up KeyChain and SigningInfo APIs

refs #4804

Change-Id: I55ad2b61f05aec8c75d5f6bafc4eea8e1e1100e9
diff --git a/tests/unit/security/signing-helpers.t.cpp b/tests/unit/security/signing-helpers.t.cpp
index f9a51b2..f4493fe 100644
--- a/tests/unit/security/signing-helpers.t.cpp
+++ b/tests/unit/security/signing-helpers.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2013-2018 Regents of the University of California.
+ * Copyright (c) 2013-2020 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -60,7 +60,7 @@
 {
   SigningInfo info = signingWithSha256();
   BOOST_CHECK_EQUAL(info.getSignerType(), SigningInfo::SIGNER_TYPE_SHA256);
-  BOOST_CHECK_EQUAL(info.getSignerName(), SigningInfo::getEmptyName());
+  BOOST_CHECK_EQUAL(info.getSignerName(), Name());
 }
 
 BOOST_AUTO_TEST_SUITE_END() // TestSigningHelpers