partial sync: segment hello and sync data

add segment publisher

refs: #4662

Change-Id: I62e7a2247bac58aeec364cd2a4e4d34259eae4af
diff --git a/tests/test-segment-publisher.cpp b/tests/test-segment-publisher.cpp
new file mode 100644
index 0000000..39881d8
--- /dev/null
+++ b/tests/test-segment-publisher.cpp
@@ -0,0 +1,162 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2014-2018,  The University of Memphis
+ *
+ * This file is part of PSync.
+ * See AUTHORS.md for complete list of PSync authors and contributors.
+ *
+ * PSync 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.
+ *
+ * PSync 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
+ * PSync, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+#include "segment-publisher.hpp"
+#include "detail/state.hpp"
+#include "unit-test-time-fixture.hpp"
+
+#include <boost/test/unit_test.hpp>
+#include <ndn-cxx/name.hpp>
+#include <ndn-cxx/data.hpp>
+#include <ndn-cxx/interest.hpp>
+#include <ndn-cxx/util/dummy-client-face.hpp>
+#include <ndn-cxx/util/segment-fetcher.hpp>
+#include <ndn-cxx/security/validator-null.hpp>
+
+namespace psync {
+
+using namespace ndn;
+
+class SegmentPublisherFixture : public tests::UnitTestTimeFixture
+{
+public:
+  SegmentPublisherFixture()
+  : face(io, util::DummyClientFace::Options{true, true})
+  , publisher(face, keyChain)
+  , freshness(1000)
+  , numComplete(0)
+  , numRepliesFromStore(0)
+  {
+    face.setInterestFilter(InterestFilter("/hello/world"),
+                           bind(&SegmentPublisherFixture::onInterest, this, _1, _2),
+                           [] (const ndn::Name& prefix, const std::string& msg) {
+                             BOOST_CHECK(false);
+                           });
+    advanceClocks(ndn::time::milliseconds(10));
+
+    for (int i = 0; i < 1000; ++i) {
+      state.addContent(Name("/test").appendNumber(i));
+    }
+  }
+
+  ~SegmentPublisherFixture() {
+    fetcher->stop();
+  }
+
+  void
+  expressInterest(const Interest& interest) {
+    fetcher = util::SegmentFetcher::start(face, interest, ndn::security::v2::getAcceptAllValidator());
+    fetcher->onComplete.connect([this] (ConstBufferPtr data) {
+                                 numComplete++;
+                               });
+    fetcher->onError.connect([] (uint32_t errorCode, const std::string& msg) {
+                              BOOST_CHECK(false);
+                            });
+
+    advanceClocks(ndn::time::milliseconds(10));
+  }
+
+  void
+  onInterest(const Name& prefix, const Interest& interest) {
+    if (publisher.replyFromStore(interest.getName())) {
+      numRepliesFromStore++;
+      return;
+    }
+
+    // If dataName is same as interest name
+    if (dataName.empty()) {
+      publisher.publish(interest.getName(), interest.getName(), state.wireEncode(), freshness);
+    }
+    else {
+      publisher.publish(interest.getName(), dataName, state.wireEncode(), freshness);
+    }
+  }
+
+  util::DummyClientFace face;
+  KeyChain keyChain;
+  SegmentPublisher publisher;
+  shared_ptr<util::SegmentFetcher> fetcher;
+  Name dataName;
+  time::milliseconds freshness;
+  State state;
+
+  int numComplete;
+  int numRepliesFromStore;
+};
+
+BOOST_FIXTURE_TEST_SUITE(TestSegmentPublisher, SegmentPublisherFixture)
+
+BOOST_AUTO_TEST_CASE(Basic)
+{
+  BOOST_CHECK_EQUAL(publisher.m_ims.size(), 0);
+  expressInterest(Interest("/hello/world"));
+  BOOST_CHECK_EQUAL(numComplete, 1);
+  // First segment is answered directly in publish,
+  // Rest two are satisfied by the store
+  BOOST_CHECK_EQUAL(numRepliesFromStore, 2);
+  BOOST_CHECK_EQUAL(publisher.m_ims.size(), 3);
+
+  numRepliesFromStore = 0;
+  expressInterest(Interest("/hello/world"));
+  BOOST_CHECK_EQUAL(numComplete, 2);
+  BOOST_CHECK_EQUAL(numRepliesFromStore, 3);
+
+  advanceClocks(ndn::time::milliseconds(freshness));
+  BOOST_CHECK_EQUAL(publisher.m_ims.size(), 0);
+
+  numRepliesFromStore = 0;
+  expressInterest(Interest("/hello/world"));
+  BOOST_CHECK_EQUAL(numComplete, 3);
+  BOOST_CHECK_EQUAL(numRepliesFromStore, 2);
+
+  numRepliesFromStore = 0;
+  face.expressInterest(Interest(Name("/hello/world/").appendSegment(0)),
+                       [this] (const Interest& interest, const Data& data) {
+                         numComplete++;
+                       },
+                       [] (const Interest& interest, const lp::Nack& nack) {
+                         BOOST_CHECK(false);
+                       },
+                       [] (const Interest& interest) {
+                         BOOST_CHECK(false);
+                       });
+  advanceClocks(ndn::time::milliseconds(10));
+  BOOST_CHECK_EQUAL(numComplete, 4);
+  BOOST_CHECK_EQUAL(numRepliesFromStore, 1);
+}
+
+BOOST_AUTO_TEST_CASE(LargerDataName)
+{
+  BOOST_CHECK_EQUAL(publisher.m_ims.size(), 0);
+  dataName = Name("/hello/world/IBF");
+
+  expressInterest(Interest("/hello/world"));
+  BOOST_CHECK_EQUAL(numComplete, 1);
+  // First segment is answered directly in publish,
+  // Rest two are satisfied by the store
+  BOOST_CHECK_EQUAL(numRepliesFromStore, 2);
+  BOOST_CHECK_EQUAL(publisher.m_ims.size(), 3);
+
+  advanceClocks(ndn::time::milliseconds(freshness));
+  BOOST_CHECK_EQUAL(publisher.m_ims.size(), 0);
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+} // namespace psync
\ No newline at end of file