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/*
* Copyright Andrey Semashev 2025.
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*/
/*!
* \file form_wrap_formatter.cpp
* \author Andrey Semashev
* \date 11.07.2025
*
* \brief This header contains tests for the \c wrap_formatter utility.
*/
#define BOOST_TEST_MODULE form_wrap_formatter
#include <string>
#include <boost/test/unit_test.hpp>
#include <boost/log/attributes/constant.hpp>
#include <boost/log/attributes/attribute_set.hpp>
#include <boost/log/utility/formatting_ostream.hpp>
#include <boost/log/utility/value_ref.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/core/record.hpp>
#include "char_definitions.hpp"
#include "make_record.hpp"
namespace logging = boost::log;
namespace attrs = logging::attributes;
namespace expr = logging::expressions;
namespace {
class my_class
{
int m_Data;
public:
explicit my_class(int data) : m_Data(data) {}
int get_data() const { return m_Data; }
};
template< typename StreamT >
inline void format_my_class(StreamT& strm, my_class const& obj)
{
strm << "[data: " << obj.get_data() << "]";
}
} // namespace
// The test checks that wrap_formatter works
BOOST_AUTO_TEST_CASE_TEMPLATE(wrap_formatter_check, CharT, char_types)
{
typedef logging::record_view record_view;
typedef logging::attribute_set attr_set;
typedef std::basic_string< CharT > string;
typedef logging::basic_formatting_ostream< CharT > osstream;
typedef logging::basic_formatter< CharT > formatter;
typedef test_data< CharT > data;
attrs::constant< int > attr1(10);
attrs::constant< double > attr2(5.5);
attrs::constant< my_class > attr3(my_class(77));
attr_set set1;
set1[data::attr1()] = attr1;
set1[data::attr2()] = attr2;
set1[data::attr3()] = attr3;
record_view rec = make_record_view(set1);
// Check for various modes of attribute value type specification
{
string str1, str2;
osstream strm1(str1), strm2(str2);
int call_count = 0;
formatter f =
expr::stream << expr::attr< int >(data::attr1())
<< expr::attr< double >(data::attr2())
<< expr::wrap_formatter< CharT >([&](record_view const& rec, osstream& strm)
{
++call_count;
logging::value_ref< my_class > val = rec[data::attr3()].template extract< my_class >();
if (val)
format_my_class(strm, val.get());
});
f(rec, strm1);
strm2 << 10 << 5.5;
format_my_class(strm2, my_class(77));
BOOST_CHECK(equal_strings(strm1.str(), strm2.str()));
}
}
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