extern void check_xml (std::string ref, std::string test, std::list<std::string> ignore, bool ignore_whitespace = false);
extern void check_file (boost::filesystem::path ref, boost::filesystem::path check);
extern std::shared_ptr<dcp::MonoPictureAsset> simple_picture (boost::filesystem::path path, std::string suffix);
extern void check_xml (std::string ref, std::string test, std::list<std::string> ignore, bool ignore_whitespace = false);
extern void check_file (boost::filesystem::path ref, boost::filesystem::path check);
extern std::shared_ptr<dcp::MonoPictureAsset> simple_picture (boost::filesystem::path path, std::string suffix);