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/* -*- 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.
*/
#ifndef NDN_TESTS_UNIT_TESTS_UNIT_TEST_TIME_FIXTURE_HPP
#define NDN_TESTS_UNIT_TESTS_UNIT_TEST_TIME_FIXTURE_HPP
#include "util/time-unit-test-clock.hpp"
#include <boost/asio/io_service.hpp>
namespace ndn {
namespace tests {
/** \brief a test fixture that overrides steady clock and system clock
*/
class UnitTestTimeFixture
{
public:
UnitTestTimeFixture()
: steadyClock(make_shared<time::UnitTestSteadyClock>())
, systemClock(make_shared<time::UnitTestSystemClock>())
{
time::setCustomClocks(steadyClock, systemClock);
}
~UnitTestTimeFixture()
{
time::setCustomClocks(nullptr, nullptr);
}
/** \brief advance steady and system clocks
*
* Clocks are advanced in increments of \p tick for \p nTicks ticks.
* After each tick, io_service is polled to process pending I/O events.
*
* Exceptions thrown during I/O events are propagated to the caller.
* Clock advancing would stop in case of an exception.
*/
void
advanceClocks(const time::nanoseconds& tick, size_t nTicks = 1)
{
this->advanceClocks(tick, tick * nTicks);
}
/** \brief advance steady and system clocks
*
* Clocks are advanced in increments of \p tick for \p total time.
* The last increment might be shorter than \p tick.
* After each tick, io_service is polled to process pending I/O events.
*
* Exceptions thrown during I/O events are propagated to the caller.
* Clock advancing would stop in case of an exception.
*/
void
advanceClocks(const time::nanoseconds& tick, const time::nanoseconds& total)
{
BOOST_ASSERT(tick > time::nanoseconds::zero());
BOOST_ASSERT(total >= time::nanoseconds::zero());
time::nanoseconds remaining = total;
while (remaining > time::nanoseconds::zero()) {
if (remaining >= tick) {
steadyClock->advance(tick);
systemClock->advance(tick);
remaining -= tick;
}
else {
steadyClock->advance(remaining);
systemClock->advance(remaining);
remaining = time::nanoseconds::zero();
}
if (io.stopped())
io.reset();
io.poll();
}
}
public:
shared_ptr<time::UnitTestSteadyClock> steadyClock;
shared_ptr<time::UnitTestSystemClock> systemClock;
boost::asio::io_service io;
};
} // namespace tests
} // namespace ndn
#endif // NDN_TESTS_UNIT_TESTS_UNIT_TEST_TIME_FIXTURE_HPP