text: // Copyright (c) 2015-2016 The Bitcoin Core developers
  // Copyright (c) 2017 The Copper Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "reverselock.h"
  #include "test/test_copper.h"
  
  #include <boost/test/unit_test.hpp>
  
  BOOST_FIXTURE_TEST_SUITE(reverselock_tests, BasicTestingSetup)
  
  BOOST_AUTO_TEST_CASE(reverselock_basics)
  {
      boost::mutex mutex;
      boost::unique_lock<boost::mutex> lock(mutex);
  
      BOOST_CHECK(lock.owns_lock());
      {
          reverse_lock<boost::unique_lock<boost::mutex> > rlock(lock);
          BOOST_CHECK(!lock.owns_lock());
      }
      BOOST_CHECK(lock.owns_lock());
  }
  
  BOOST_AUTO_TEST_CASE(reverselock_errors)
  {
      boost::mutex mutex;
      boost::unique_lock<boost::mutex> lock(mutex);
  
      // Make sure trying to reverse lock an unlocked lock fails
      lock.unlock();
  
      BOOST_CHECK(!lock.owns_lock());
  
      bool failed = false;
      try {
          reverse_lock<boost::unique_lock<boost::mutex> > rlock(lock);
      } catch(...) {
          failed = true;
      }
  
      BOOST_CHECK(failed);
      BOOST_CHECK(!lock.owns_lock());
  
      // Locking the original lock after it has been taken by a reverse lock
      // makes no sense. Ensure that the original lock no longer owns the lock
      // after giving it to a reverse one.
  
      lock.lock();
      BOOST_CHECK(lock.owns_lock());
      {
          reverse_lock<boost::unique_lock<boost::mutex> > rlock(lock);
          BOOST_CHECK(!lock.owns_lock());
      }
  
      BOOST_CHECK(failed);
      BOOST_CHECK(lock.owns_lock());
  }
  
  BOOST_AUTO_TEST_SUITE_END()
  