text: // Copyright (c) 2015-2016 The Bitcoin 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_vitalcoin.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()
  