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#ifndef BOOST_CONTRACT_TEST_DETAIL_OTESTSTREAM_HPP_
#define BOOST_CONTRACT_TEST_DETAIL_OTESTSTREAM_HPP_
// Copyright (C) 2008-2018 Lorenzo Caminiti
// Distributed under the Boost Software License, Version 1.0 (see accompanying
// file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
// See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
#include <boost/iostreams/tee.hpp>
#include <boost/iostreams/stream.hpp>
#include <string>
#include <sstream>
#include <iostream>
#include <algorithm>
namespace boost { namespace contract { namespace test { namespace detail {
namespace oteststream_ {
struct oss_base { // Wrap oss data member for proper initialization order.
protected:
std::ostringstream oss_;
};
}
// Print to clog plus build internal string (using ostringstream) for checking.
struct oteststream :
private oteststream_::oss_base,
public boost::iostreams::stream<boost::iostreams::tee_device<std::ostream,
std::ostringstream> >
{
oteststream() :
oteststream_::oss_base(),
boost::iostreams::stream<boost::iostreams::tee_device<
std::ostream, std::ostringstream> >(
boost::iostreams::tee_device<std::ostream, std::ostringstream>(
std::clog, oss_)
)
{}
std::string str() const { return oss_.str(); }
void str(std::string const& s) { oss_.str(s); }
bool eq(std::string const& s) { return eq(str(), s); }
// Also display mismatching characters.
static bool eq(std::string const& r, std::string const& s) {
std::string::size_type i = 0;
for(; i < r.size() && i < s.size(); ++i) if(r[i] != s[i]) break;
if(i < r.size() || i < s.size()) {
std::cout << std::endl;
std::cout <<
"Error: Following strings differ at position " << i <<
", because '" << r[i] << "' != '" << s[i] << "':" << std::endl
;
std::cout << std::endl;
std::cout
<< r.substr(0, i)
<< "(((" << r[i] << ")))"
// Extra () to avoid clashes with MSVC min macro.
<< r.substr((std::min)(i + 1, r.size()), r.size())
<< std::endl
;
std::cout << std::endl;
std::cout
<< s.substr(0, i)
<< "(((" << s[i] << ")))"
// Extra () to avoid clashes with MSVC min macro.
<< s.substr((std::min)(i + 1, s.size()), s.size())
<< std::endl
;
std::cout << std::endl;
return false;
}
return true;
}
};
} } } } // namespace
#endif // #include guard
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