tests: Scheduler benchmark

refs #3722

Change-Id: I52a9ef3bca3a458e4f397b50e104044e0fba2cf7
diff --git a/tests/integrated/scheduler-benchmark.cpp b/tests/integrated/scheduler-benchmark.cpp
new file mode 100644
index 0000000..6166899
--- /dev/null
+++ b/tests/integrated/scheduler-benchmark.cpp
@@ -0,0 +1,88 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2016 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library 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 Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#define BOOST_TEST_MAIN 1
+#define BOOST_TEST_DYN_LINK 1
+#define BOOST_TEST_MODULE Scheduler Benchmark
+
+#include "util/scheduler.hpp"
+
+#include "boost-test.hpp"
+
+namespace ndn {
+namespace util {
+namespace scheduler {
+namespace tests {
+
+BOOST_AUTO_TEST_CASE(ScheduleCancel)
+{
+  boost::asio::io_service io;
+  Scheduler sched(io);
+
+  const int nEvents = 1000000;
+  std::vector<EventId> eventIds(nEvents);
+
+  time::steady_clock::TimePoint t1 = time::steady_clock::now();
+  for (int i = 0; i < nEvents; ++i) {
+    eventIds[i] = sched.scheduleEvent(time::seconds(1), []{});
+  }
+  time::steady_clock::TimePoint t2 = time::steady_clock::now();
+  for (int i = 0; i < nEvents; ++i) {
+    sched.cancelEvent(eventIds[i]);
+  }
+  time::steady_clock::TimePoint t3 = time::steady_clock::now();
+
+  BOOST_TEST_MESSAGE("schedule " << nEvents << " events: " << (t2 - t1));
+  BOOST_TEST_MESSAGE("cancel " << nEvents << " events: " << (t3 - t2));
+}
+
+BOOST_AUTO_TEST_CASE(Execute)
+{
+  boost::asio::io_service io;
+  Scheduler sched(io);
+
+  const int nEvents = 1000000;
+  int nExpired = 0;
+
+  // Events should expire at t1, but execution finishes at t2. The difference is the overhead.
+  time::steady_clock::TimePoint t1 = time::steady_clock::now() + time::seconds(5);
+  time::steady_clock::TimePoint t2;
+  // +1ms ensures this extra event is executed last. In case the overhead is less than 1ms,
+  // it will be reported as 1ms.
+  sched.scheduleEvent(t1 - time::steady_clock::now() + time::milliseconds(1), [&] {
+    t2 = time::steady_clock::now();
+    BOOST_REQUIRE_EQUAL(nExpired, nEvents);
+  });
+
+  for (int i = 0; i < nEvents; ++i) {
+    sched.scheduleEvent(t1 - time::steady_clock::now(), [&] { ++nExpired; });
+  }
+
+  io.run();
+
+  BOOST_REQUIRE_EQUAL(nExpired, nEvents);
+  BOOST_TEST_MESSAGE("execute " << nEvents << " events: " << (t2 - t1));
+}
+
+} // namespace tests
+} // namespace scheduler
+} // namespace util
+} // namespace ndn
diff --git a/tests/integrated/wscript b/tests/integrated/wscript
index 311059d..08260b7 100644
--- a/tests/integrated/wscript
+++ b/tests/integrated/wscript
@@ -5,16 +5,11 @@
 top = '..'
 
 def build(bld):
-    bld(features="cxx cxxprogram",
-        target="face",
-        source="face.cpp",
-        use='ndn-cxx boost-tests-base BOOST',
-        includes='..',
-        install_path=None)
-
-    bld(features="cxx cxxprogram",
-        target="network-monitor",
-        source="network-monitor.cpp",
-        use='ndn-cxx boost-tests-base BOOST',
-        includes='..',
-        install_path=None)
+    for i in bld.path.ant_glob(['*.cpp']):
+        name = str(i)[:-len(".cpp")]
+        bld(features='cxx cxxprogram',
+            target=name,
+            source=[i],
+            use='ndn-cxx boost-tests-base BOOST',
+            includes='..',
+            install_path=None)