model+ndn.cxx+test: Finishing implementation of ApiFace (now timeouts are working as well)

Also, adding a basic test case to test ApiFace

Refs #1005 (http://redmine.named-data.net/)
diff --git a/test/ndnSIM-api.cc b/test/ndnSIM-api.cc
new file mode 100644
index 0000000..b472850
--- /dev/null
+++ b/test/ndnSIM-api.cc
@@ -0,0 +1,162 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013, Regents of the University of California
+ *                     Alexander Afanasyev
+ *
+ * GNU v3.0 license, See the LICENSE file for more information
+ *
+ * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#include "ndnSIM-api.h"
+#include "ns3/core-module.h"
+#include "ns3/ndnSIM-module.h"
+#include "ns3/point-to-point-module.h"
+
+#include <boost/lexical_cast.hpp>
+
+NS_LOG_COMPONENT_DEFINE ("ndn.ApiTest");
+
+namespace ns3
+{
+
+class ApiTestClient : public Application
+{
+public:
+  static TypeId
+  GetTypeId ()
+  {
+    static TypeId tid = TypeId ("ns3::ndn::test::ApiTestClient")
+      .SetParent<Application> ()
+      .AddConstructor<ApiTestClient> ()
+      ;
+    
+    return tid;
+  }
+
+  ApiTestClient ()
+    : datas (0)
+    , timeouts (0)
+  {
+  }
+  
+protected:
+  void
+  StartApplication ()
+  {
+    m_face = Create<ndn::ApiFace> (GetNode ());
+    
+    Simulator::Schedule (Seconds (0.1), &ApiTestClient::SendPacket, this, std::string ("/1"));
+    Simulator::Schedule (Seconds (5.0), &ApiTestClient::SendPacket, this, std::string ("/2"));
+  }
+
+  void
+  StopApplication ()
+  {
+    m_face->Shutdown ();
+    m_face = 0;
+  }
+
+private:
+  void
+  GotData (Ptr<const ndn::Interest>, Ptr<const ndn::ContentObject>)
+  {
+    datas++;
+  }
+
+  void
+  GotTimeout (Ptr<const ndn::Interest>)
+  {
+    timeouts++;
+  }
+
+  void
+  SendPacket (const std::string &prefix)
+  {
+    Ptr<ndn::Interest> interest = Create<ndn::Interest> ();
+    interest->SetName (Create<ndn::Name> (prefix));
+    interest->SetInterestLifetime (Seconds (0.5));
+
+    m_face->ExpressInterest (interest,
+                             MakeCallback (&ApiTestClient::GotData, this),
+                             MakeCallback (&ApiTestClient::GotTimeout, this));
+  }
+
+public:
+  uint32_t datas;
+  uint32_t timeouts;
+  
+private:
+  Ptr<ndn::ApiFace> m_face;
+};
+
+NS_OBJECT_ENSURE_REGISTERED (ApiTestClient);
+
+void
+ApiTest::Check0 (Ptr<Application> app)
+{
+  NS_TEST_ASSERT_MSG_EQ (DynamicCast<ApiTestClient> (app)->datas, 0, "");
+  NS_TEST_ASSERT_MSG_EQ (DynamicCast<ApiTestClient> (app)->timeouts, 0, "");
+}
+
+void
+ApiTest::Check1 (Ptr<Application> app)
+{
+  NS_TEST_ASSERT_MSG_EQ (DynamicCast<ApiTestClient> (app)->datas, 1, "");
+  NS_TEST_ASSERT_MSG_EQ (DynamicCast<ApiTestClient> (app)->timeouts, 0, "");
+}
+
+void
+ApiTest::Check2 (Ptr<Application> app)
+{
+  NS_TEST_ASSERT_MSG_EQ (DynamicCast<ApiTestClient> (app)->datas, 1, "");
+  NS_TEST_ASSERT_MSG_EQ (DynamicCast<ApiTestClient> (app)->timeouts, 1, "");
+}
+
+
+void
+ApiTest::DoRun ()
+{
+  Config::SetDefault ("ns3::PointToPointNetDevice::DataRate", StringValue ("1Mbps"));
+  Config::SetDefault ("ns3::PointToPointChannel::Delay", StringValue ("10ms"));
+  Config::SetDefault ("ns3::DropTailQueue::MaxPackets", StringValue ("20"));
+
+  // Creating nodes
+  NodeContainer nodes;
+  nodes.Create (3);
+
+  // Connecting nodes using two links
+  PointToPointHelper p2p;
+  p2p.Install (nodes.Get (0), nodes.Get (1));
+  p2p.Install (nodes.Get (1), nodes.Get (2));
+
+  // Install NDN stack on all nodes
+  ndn::StackHelper ndnHelper;
+  ndnHelper.SetDefaultRoutes (true);
+  ndnHelper.InstallAll ();
+
+  // Installing applications
+
+  // Consumer
+  ndn::AppHelper consumerHelper ("ns3::ndn::test::ApiTestClient");
+  ApplicationContainer apps = consumerHelper.Install (nodes.Get (0)); // first node
+
+  // Producer
+  ndn::AppHelper producerHelper ("ns3::ndn::Producer");
+  // Producer will reply to all requests starting with /prefix
+  producerHelper.SetPrefix ("/");
+  producerHelper.SetAttribute ("Postfix", StringValue ("/unique/postfix"));
+  producerHelper.SetAttribute ("PayloadSize", StringValue("1024"));
+  producerHelper.Install (nodes.Get (2)).Stop (Seconds (4.0)); // last node
+
+  Simulator::Schedule (Seconds (0.0001), &ApiTest::Check0, this, apps.Get (0));
+  Simulator::Schedule (Seconds (0.2000), &ApiTest::Check1, this, apps.Get (0));
+  Simulator::Schedule (Seconds (5.6100), &ApiTest::Check2, this, apps.Get (0));
+
+  Simulator::Stop (Seconds (20.0));
+
+  Simulator::Run ();
+  Simulator::Destroy ();
+}
+
+}