std::string file_contents(const std::string &filename)
void require_message_count(const std::string &filename, const std::size_t messages)
std::size_t count_lines(const std::string &filename)
std::size_t count_files(const std::string &folder)
std::size_t get_filesize(const std::string &filename)
bool ends_with(std::string const &value, std::string const &ending)