rib: move config parsing to Service class

This commit also de-duplicates code in Service class constructors
and reduces usage of unique_ptrs.

refs #4650

Change-Id: Ibbf454841b76ffe4d569b51fef3b1d06f7d2fdfc
diff --git a/tests/rib/service.t.cpp b/tests/rib/service.t.cpp
new file mode 100644
index 0000000..14ee649
--- /dev/null
+++ b/tests/rib/service.t.cpp
@@ -0,0 +1,62 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2014-2018,  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/service.hpp"
+#include "tests/rib-io-fixture.hpp"
+#include "tests/test-common.hpp"
+
+namespace nfd {
+namespace rib {
+namespace tests {
+
+BOOST_FIXTURE_TEST_SUITE(TestService, nfd::tests::RibIoFixture)
+
+BOOST_AUTO_TEST_CASE(Basic)
+{
+  ConfigSection section;
+  section.put("face_system.unix.path", "/var/run/nfd.sock");
+
+  ndn::KeyChain ribKeyChain;
+
+  BOOST_CHECK_THROW(Service::get(), std::logic_error);
+  BOOST_CHECK_THROW(Service(section, ribKeyChain), std::logic_error);
+
+  runOnRibIoService([&] {
+    {
+      BOOST_CHECK_THROW(Service::get(), std::logic_error);
+      Service ribService(section, ribKeyChain);
+      BOOST_CHECK_EQUAL(&ribService, &Service::get());
+    }
+    BOOST_CHECK_THROW(Service::get(), std::logic_error);
+    Service ribService(section, ribKeyChain);
+    BOOST_CHECK_THROW(Service(section, ribKeyChain), std::logic_error);
+  });
+}
+
+BOOST_AUTO_TEST_SUITE_END() // TestRibService
+
+} // namespace tests
+} // namespace rib
+} // namespace nfd