void print_some_info(int severity, const char* message, va_list argp)
{
    UNSCOPED_INFO(message);

    std::string value;
    value.resize(20);
    REQUIRE(value.size() == 20);

    UNSCOPED_INFO("testing size of formated string");
    size_t size = vsnprintf(const_cast<char*>(value.c_str()), 0, message, argp);
    value.resize(size + 1);
    REQUIRE(value.size() == size + 1);

    UNSCOPED_INFO("create copy of formate string");
    UNSCOPED_INFO("size of string is" << value.size());
    size = vsnprintf(const_cast<char*>(value.c_str()), value.size(), message, argp);
    UNSCOPED_INFO("size of string is" << size);
    REQUIRE(value.size() == size + 1);

    //UNSCOPED_INFO("set null terminator");
    //value.c_str()[size] = 0;

    UNSCOPED_INFO(value.c_str());
}