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699fcc1281
Although attributes are normally only shallow-copied, it is useful to allow the channel attribute to be deep copied when the parent logger is copied. This would eliminate the unexpected effect of modifying the channel in the copy, as it would otherwise affect the original logger. This commit makes copy constructor and assignment of the channel loggers deep-copy the channel value. The problem was reported in: https://stackoverflow.com/questions/66120806/deep-copy-of-boost-logger. Note that any other attributes that might have been added to the logger are still shallow copied.
47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
/*
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* Copyright Andrey Semashev 2021.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*!
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* \file src_channel_logger_copy.cpp
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* \author Andrey Semashev
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* \date 10.02.2021
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*
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* \brief This header contains tests for the channel logger copy constructor and assignment.
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*/
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#define BOOST_TEST_MODULE src_channel_logger_copy
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#include <string>
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#include <boost/test/unit_test.hpp>
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#include <boost/log/sources/channel_logger.hpp>
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namespace src = boost::log::sources;
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// Test that copy constructor decouples the channel attribute
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BOOST_AUTO_TEST_CASE(copy_constructor)
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{
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src::channel_logger< std::string > lg1("channel1");
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src::channel_logger< std::string > lg2 = lg1;
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BOOST_CHECK_EQUAL(lg1.channel(), lg2.channel());
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lg2.channel("channel2");
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BOOST_CHECK_NE(lg1.channel(), lg2.channel());
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}
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// Test that copy assignment decouples the channel attribute
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BOOST_AUTO_TEST_CASE(copy_assignment)
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{
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src::channel_logger< std::string > lg1("channel1");
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src::channel_logger< std::string > lg2("channel2");
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BOOST_CHECK_NE(lg1.channel(), lg2.channel());
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lg2 = lg1;
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BOOST_CHECK_EQUAL(lg1.channel(), lg2.channel());
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lg2.channel("channel3");
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BOOST_CHECK_NE(lg1.channel(), lg2.channel());
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}
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