operatingsystem

type OperatingSystem interface {
	Getenv(key string) string
	Stat(name string) (os.FileInfo, error)
	Getwd() (string, error)
	OpenFile(name string, flag int, perm os.FileMode) (*os.File, error)
	Remove(name string) error
	IsNotExist(err error) bool
	MkdirAll(path string, perm os.FileMode) error
	Rename(oldPath, newPath string) error
}