// with the Op field set to "open", the Path field set to name,
// and the Err field describing the problem.
//
// Open should reject attempts to open names that do not satisfy
// ValidPath(name), returning a *PathError with Err set to
// ErrInvalid or ErrNotExist.
func (ffs *fakeFsWithFakeFds) Open(name string) (fs.File, error) {
	f, err := ffs.ReadDirFS.Open(name)
	if err != nil {
		return nil, err

		return errInvalidArgument
	}

	if r.Source.Endpoint != "" && !r.Source.Type.isMinio() && !r.Source.ValidPath() {
		return errInvalidArgument
	}

	if r.Target.Endpoint != "" && !r.Target.Type.isMinio() && !r.Target.ValidPath() {
		return errInvalidArgument
	}

	if !r.Target.Creds.Empty() {
		if err := r.Target.Creds.Validate(); err != nil {
			return err