rib: simplify Route class

Route::expires is changed to an optional, with nullopt representing
"never expires". This avoids an integer overflow.

RouteFlags accessors are now provided by ndn::nfd::RouteFlagsTraits.

Stream insertion operator is improved.

refs #3502

Change-Id: Ia912eab771fb00020385bf84d486955feae6aafa
diff --git a/tests/rib/route.t.cpp b/tests/rib/route.t.cpp
new file mode 100644
index 0000000..d7b70eb
--- /dev/null
+++ b/tests/rib/route.t.cpp
@@ -0,0 +1,96 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2017,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "rib/route.hpp"
+#include "tests/test-common.hpp"
+
+namespace nfd {
+namespace rib {
+namespace tests {
+
+using namespace nfd::tests;
+
+BOOST_FIXTURE_TEST_SUITE(TestRoute, BaseFixture)
+
+BOOST_AUTO_TEST_CASE(Equality)
+{
+  Route a;
+  Route b;
+  BOOST_CHECK_EQUAL(a, b);
+
+  a.faceId = b.faceId = 15404;
+  a.origin = b.origin = ndn::nfd::ROUTE_ORIGIN_NLSR;
+  a.flags = b.flags = ndn::nfd::ROUTE_FLAG_CHILD_INHERIT;
+  a.cost = b.cost = 28826;
+  a.expires = b.expires = time::steady_clock::now() + time::milliseconds(26782232);
+  BOOST_CHECK_EQUAL(a, b);
+
+  b.faceId = 18559;
+  BOOST_CHECK_NE(a, b);
+  a.faceId = 18559;
+
+  b.origin = ndn::nfd::ROUTE_ORIGIN_CLIENT;
+  BOOST_CHECK_NE(a, b);
+  a.origin = ndn::nfd::ROUTE_ORIGIN_CLIENT;
+
+  b.flags = ndn::nfd::ROUTE_FLAG_CAPTURE;
+  BOOST_CHECK_NE(a, b);
+  a.flags = ndn::nfd::ROUTE_FLAG_CAPTURE;
+
+  b.cost = 103;
+  BOOST_CHECK_NE(a, b);
+  a.cost = 103;
+
+  b.expires = ndn::nullopt;
+  BOOST_CHECK_NE(a, b);
+  a.expires = ndn::nullopt;
+
+  BOOST_CHECK_EQUAL(a, b);
+}
+
+BOOST_FIXTURE_TEST_CASE(Output, UnitTestTimeFixture)
+{
+  Route r;
+  BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(r),
+                    "Route(faceid: 0, origin: app, cost: 0, flags: 0x0, never expires)");
+
+  r.faceId = 4980;
+  r.origin = ndn::nfd::ROUTE_ORIGIN_STATIC;
+  r.flags = ndn::nfd::ROUTE_FLAG_CHILD_INHERIT;
+  r.cost = 2312;
+  r.expires = time::steady_clock::now() + time::milliseconds(791214234);
+  BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(r),
+                    "Route(faceid: 4980, origin: static, cost: 2312, flags: 0x1, expires in: 791214234 milliseconds)");
+
+  r.expires = ndn::nullopt;
+  BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(r),
+                    "Route(faceid: 4980, origin: static, cost: 2312, flags: 0x1, never expires)");
+}
+
+BOOST_AUTO_TEST_SUITE_END() // TestRoute
+
+} // namespace tests
+} // namespace rib
+} // namespace nfd