/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2014-2018, Regents of the University of California
 *
 * NAC 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.
 *
 * NAC 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 NAC library authors and contributors.
 */

#ifndef NAC_TESTS_UNIT_TEST_COMMON_FIXTURES_HPP
#define NAC_TESTS_UNIT_TEST_COMMON_FIXTURES_HPP

#include "boost-test.hpp"
#include "identity-management-fixture.hpp"

#include <boost/asio.hpp>
#include <ndn-cxx/util/time-unit-test-clock.hpp>

namespace ndn {
namespace nac {
namespace tests {

/** \brief base test fixture
 *
 *  Every test case should be based on this fixture,
 *  to have per test case io_service initialization.
 */
class BaseFixture : public IdentityManagementFixture
{
protected:
  BaseFixture();

protected:
  /** \brief reference to global io_service
   */
  boost::asio::io_service m_io;
};

/** \brief a base test fixture that overrides steady clock and system clock
 */
class UnitTestTimeFixture : public BaseFixture
{
protected:
  UnitTestTimeFixture();

  ~UnitTestTimeFixture();

  /** \brief advance steady and system clocks
   *
   *  Clocks are advanced in increments of \p tick for \p nTicks ticks.
   *  After each tick, global 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);

  /** \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, global 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);

protected:
  shared_ptr<time::UnitTestSteadyClock> steadyClock;
  shared_ptr<time::UnitTestSystemClock> systemClock;

  friend class LimitedIo;
};

} // namespace tests
} // namespace nac
} // namespace ndn

#endif // NAC_TESTS_UNIT_TEST_COMMON_FIXTURES_HPP