poke: add unit testing

refs #3740

Change-Id: I170068cf69463e92b2019cc27747777d224c0232
diff --git a/tools/peek/ndnpoke/main.cpp b/tools/peek/ndnpoke/main.cpp
new file mode 100644
index 0000000..5cb0dda
--- /dev/null
+++ b/tools/peek/ndnpoke/main.cpp
@@ -0,0 +1,194 @@
+/* -*- 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 ndn-tools (Named Data Networking Essential Tools).
+ * See AUTHORS.md for complete list of ndn-tools authors and contributors.
+ *
+ * ndn-tools 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.
+ *
+ * ndn-tools 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
+ * ndn-tools, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @author Jerald Paul Abraham <jeraldabraham@email.arizona.edu>
+ */
+
+#include "ndnpoke.hpp"
+#include "core/version.hpp"
+
+#include <ndn-cxx/util/io.hpp>
+
+#include <sstream>
+
+namespace ndn {
+namespace peek {
+
+namespace po = boost::program_options;
+
+static void
+usage(std::ostream& os, const po::options_description& options)
+{
+  os << "Usage: ndnpoke [options] ndn:/name\n"
+        "\n"
+        "Reads payload from stdin and sends it to the local NDN forwarder as a single Data packet\n"
+        "\n"
+     << options;
+}
+
+static int
+main(int argc, char* argv[])
+{
+  PokeOptions options;
+  bool wantDigestSha256;
+
+  po::options_description visibleOptDesc;
+  visibleOptDesc.add_options()
+    ("help,h", "print help and exit")
+    ("version,V", "print version and exit")
+    ("force,f", po::bool_switch(&options.wantForceData),
+        "for, send Data without waiting for Interest")
+    ("digest,D", po::bool_switch(&wantDigestSha256),
+        "use DigestSha256 signing method instead of SignatureSha256WithRsa")
+    ("identity,i", po::value<std::string>(),
+        "set identity to be used for signing")
+    ("final,F", po::bool_switch(&options.wantLastAsFinalBlockId),
+        "set FinalBlockId to the last component of Name")
+    ("freshness,x", po::value<int>(),
+        "set FreshnessPeriod in milliseconds")
+    ("timeout,w", po::value<int>(),
+        "set Timeout in milliseconds")
+  ;
+
+  po::options_description hiddenOptDesc;
+  hiddenOptDesc.add_options()
+    ("name", po::value<std::string>(), "Data name");
+
+  po::options_description optDesc;
+  optDesc.add(visibleOptDesc).add(hiddenOptDesc);
+
+  po::positional_options_description optPos;
+  optPos.add("name", -1);
+
+  po::variables_map vm;
+  try {
+    po::store(po::command_line_parser(argc, argv).options(optDesc).positional(optPos).run(), vm);
+    po::notify(vm);
+  }
+  catch (const po::error& e) {
+    std::cerr << "ERROR: " << e.what() << std::endl;
+    return 2;
+  }
+
+  // We store timeout here, instead of PokeOptions, because processEvents is called outside the NdnPoke class
+  time::milliseconds timeout = 10_s;
+
+  if (vm.count("help") > 0) {
+    usage(std::cout, visibleOptDesc);
+    return 0;
+  }
+
+  if (vm.count("version") > 0) {
+    std::cout << "ndnpoke " << tools::VERSION << std::endl;
+    return 0;
+  }
+
+  if (vm.count("name") > 0) {
+    options.prefixName = vm["name"].as<std::string>();
+  }
+  else {
+    std::cerr << "ERROR: Data name is missing" << std::endl;
+    usage(std::cerr, visibleOptDesc);
+    return 2;
+  }
+
+  if (wantDigestSha256) {
+    options.signingInfo.setSha256Signing();
+  }
+
+  if (vm.count("identity") > 0) {
+    if (wantDigestSha256) {
+      std::cerr << "ERROR: Signing identity cannot be specified when using DigestSha256 signing method" << std::endl;
+      usage(std::cerr, visibleOptDesc);
+      return 2;
+    }
+    options.signingInfo.setSigningIdentity(vm["identity"].as<std::string>());
+  }
+
+  if (vm.count("final") > 0) {
+    if (!options.prefixName.empty()) {
+      options.wantLastAsFinalBlockId = true;
+    }
+    else {
+      std::cerr << "The provided Name must have 1 or more components to be used with FinalBlockId option" << std::endl;
+      usage(std::cerr, visibleOptDesc);
+      return 1;
+    }
+  }
+
+  if (vm.count("freshness") > 0) {
+    if (vm["freshness"].as<int>() >= 0) {
+      options.freshnessPeriod = time::milliseconds(vm["freshness"].as<int>());
+    }
+    else {
+      std::cerr << "ERROR: FreshnessPeriod must be a non-negative integer" << std::endl;
+      usage(std::cerr, visibleOptDesc);
+      return 2;
+    }
+  }
+
+  if (vm.count("timeout") > 0) {
+    if (vm["timeout"].as<int>() > 0) {
+      timeout = time::milliseconds(vm["timeout"].as<int>());
+    }
+    else {
+      std::cerr << "ERROR: Timeout must a positive integer" << std::endl;
+      usage(std::cerr, visibleOptDesc);
+      return 2;
+    }
+  }
+
+  boost::asio::io_service io;
+  Face face(io);
+  KeyChain keyChain;
+  scheduler::Scheduler scheduler(io);
+  NdnPoke program(face, keyChain, std::cin, options);
+  try {
+    program.afterFinish.connect([&scheduler, &face] {
+        scheduler.scheduleEvent(2_s, [&face] { face.shutdown(); });
+      });
+    program.start();
+    face.processEvents(timeout);
+  }
+  catch (const std::exception& e) {
+    std::cerr << "ERROR: " << e.what() << "\n" << std::endl;
+    return 1;
+  }
+
+  if (program.wasDataSent()) {
+    return 0;
+  }
+  else {
+    return 1;
+  }
+}
+
+} // namespace peek
+} // namespace ndn
+
+int
+main(int argc, char* argv[])
+{
+  return ndn::peek::main(argc, argv);
+}