ceph/src/boost/libs/log/test/run/unhandled_exception_count.cpp

   1 /*
   2  *          Copyright Andrey Semashev 2007 - 2015.
   3  * Distributed under the Boost Software License, Version 1.0.
   4  *    (See accompanying file LICENSE_1_0.txt or copy at
   5  *          http://www.boost.org/LICENSE_1_0.txt)
   6  */
   7 /*!
   8  * \file   unhandled_exception_count.cpp
   9  * \author Andrey Semashev
  10  * \date   20.04.2013
  11  *
  12  * \brief  This file contains tests for the unhandled_exception_count internal function.
  13  *
  14  * The unhandled_exception_count function is not for public use but its tests show
  15  * whether the library will be able to emit log records in contexts when exceptions are being thrown.
  16  *
  17  * This file only contains the very basic checks of functionality that can be portably achieved
  18  * through std::unhandled_exception.
  19  */
  20
  21 #define BOOST_TEST_MODULE unhandled_exception_count
  22
  23 #include <boost/test/unit_test.hpp>
  24 #include <boost/log/detail/unhandled_exception_count.hpp>
  25
  26 struct my_exception {};
  27
  28 class exception_watcher
  29 {
  30     unsigned int& m_count;
  31
  32 public:
  33     explicit exception_watcher(unsigned int& count) : m_count(count) {}
  34     ~exception_watcher() { m_count = boost::log::aux::unhandled_exception_count(); }
  35 };
  36
  37 // Tests for unhandled_exception_count when used in a destructor while an exception propagates
  38 BOOST_AUTO_TEST_CASE(in_destructor)
  39 {
  40     const unsigned int root_count = boost::log::aux::unhandled_exception_count();
  41
  42     unsigned int level1_count = root_count;
  43     try
  44     {
  45         exception_watcher watcher(level1_count);
  46         throw my_exception();
  47     }
  48     catch (...)
  49     {
  50     }
  51
  52     BOOST_CHECK_NE(root_count, level1_count);
  53 }