/* -*- 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_TEST_HOME_ENV_SAVER_HPP
#define NDN_TESTS_UNIT_TESTS_TEST_HOME_ENV_SAVER_HPP

#include <string>
#include <cstdlib>

namespace ndn {
namespace tests {

class TestHomeEnvSaver
{
public:
  TestHomeEnvSaver()
  {
    if (std::getenv("TEST_HOME") != nullptr)
      m_HOME = std::getenv("TEST_HOME");
  }

  virtual
  ~TestHomeEnvSaver()
  {
    if (!m_HOME.empty())
      setenv("TEST_HOME", m_HOME.c_str(), 1);
    else
      unsetenv("TEST_HOME");
  }

private:
  std::string m_HOME;
};

} // namespace tests
} // namespace ndn

#endif // NDN_TESTS_UNIT_TESTS_TEST_HOME_ENV_SAVER_HPP