tests+ci: Add and enable a partial unit test coverage

Change-Id: I6dbc5cf4d68679bd6f943322f572313884c8aef7
Refs: #2369
diff --git a/tests/unit-tests/helper/ndn-link-control-helper.t.cpp b/tests/unit-tests/helper/ndn-link-control-helper.t.cpp
new file mode 100644
index 0000000..31ac2f2
--- /dev/null
+++ b/tests/unit-tests/helper/ndn-link-control-helper.t.cpp
@@ -0,0 +1,94 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2011-2015  Regents of the University of California.
+ *
+ * This file is part of ndnSIM. See AUTHORS for complete list of ndnSIM authors and
+ * contributors.
+ *
+ * ndnSIM 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.
+ *
+ * ndnSIM 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
+ * ndnSIM, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+#include "helper/ndn-link-control-helper.hpp"
+#include "model/ndn-l3-protocol.hpp"
+#include "model/ndn-net-device-face.hpp"
+#include "model/ndn-app-face.hpp"
+#include "NFD/daemon/fw/forwarder.hpp"
+
+#include <ndn-cxx/management/nfd-face-status.hpp>
+
+#include "ns3/assert.h"
+#include "ns3/names.h"
+#include "ns3/point-to-point-net-device.h"
+#include "ns3/point-to-point-channel.h"
+#include "ns3/channel.h"
+#include "ns3/log.h"
+#include "ns3/error-model.h"
+#include "ns3/string.h"
+#include "ns3/boolean.h"
+#include "ns3/double.h"
+#include "ns3/pointer.h"
+
+#include "ns3/core-module.h"
+#include "ns3/network-module.h"
+#include "ns3/point-to-point-module.h"
+#include "ns3/ndnSIM-module.h"
+
+#include "../tests-common.hpp"
+
+namespace ns3 {
+namespace ndn {
+
+BOOST_FIXTURE_TEST_SUITE(HelperNdnLinkControlHelper, CleanupFixture)
+
+BOOST_AUTO_TEST_CASE(FailLink)
+{
+  NodeContainer nodes;
+  nodes.Create(2);
+
+  PointToPointHelper p2p;
+  p2p.Install(nodes.Get(0), nodes.Get(1));
+
+  StackHelper ndnHelper;
+  ndnHelper.SetDefaultRoutes(true);
+
+  Ptr<FaceContainer> node0_faceContainer = ndnHelper.InstallAll();
+
+  AppHelper consumerHelper("ns3::ndn::ConsumerCbr");
+
+  consumerHelper.SetPrefix("/prefix");
+  consumerHelper.SetAttribute("Frequency", StringValue("1"));
+  ApplicationContainer consumerAppContainer = consumerHelper.Install(nodes.Get(0));
+
+  AppHelper producerHelper("ns3::ndn::Producer");
+
+  producerHelper.SetPrefix("/prefix");
+  producerHelper.SetAttribute("PayloadSize", StringValue("1024"));
+  ApplicationContainer producerAppContainer = producerHelper.Install(nodes.Get(1));
+
+  FaceContainer::Iterator node2Face_it = node0_faceContainer->Begin() + 1;
+
+  auto node1_netDeviceFace = std::dynamic_pointer_cast<NetDeviceFace>(node0_faceContainer->Get(node2Face_it));
+
+  Simulator::Schedule(Seconds(0.0), ndn::LinkControlHelper::FailLink, nodes.Get(0), nodes.Get(1));
+  Simulator::Schedule(Seconds(5.0), ndn::LinkControlHelper::UpLink, nodes.Get(0), nodes.Get(1));
+  Simulator::Stop(Seconds(10.0));
+
+  Simulator::Run();
+
+  ::ndn::nfd::FaceStatus faceStatus = node1_netDeviceFace->getFaceStatus();
+  BOOST_CHECK_EQUAL(faceStatus.getNInInterests(), 5);
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+} // namespace ndn
+} // namespace ns3