tests: use decorators to label test data generators

Also various minor cleanups

Change-Id: Iaee434991b923abdf464293fec35da22d6cb449a
diff --git a/tests/boost-test.hpp b/tests/boost-test.hpp
index a503391..ef3fb4e 100644
--- a/tests/boost-test.hpp
+++ b/tests/boost-test.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2013-2020 Regents of the University of California.
+ * Copyright (c) 2013-2024 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -29,4 +29,6 @@
 #define BOOST_TEST_DYN_LINK
 #include <boost/test/unit_test.hpp>
 
+namespace ut = boost::unit_test;
+
 #endif // NDN_CXX_TESTS_BOOST_TEST_HPP