fstest/mockfs: create mock fs.Fs for testing

fstest/mockfs/mockfs.go

@@ -0,0 +1,106 @@
+package mockfs
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"time"
+
+	"github.com/ncw/rclone/fs"
+	"github.com/ncw/rclone/fs/hash"
+)
+
+// Fs is a minimal mock Fs
+type Fs struct {
+	name     string       // the name of the remote
+	root     string       // The root directory (OS path)
+	features *fs.Features // optional features
+}
+
+// ErrNotImplemented is returned by unimplemented methods
+var ErrNotImplemented = errors.New("not implemented")
+
+// NewFs returns a new mock Fs
+func NewFs(name, root string) *Fs {
+	f := &Fs{
+		name: name,
+		root: root,
+	}
+	f.features = (&fs.Features{}).Fill(f)
+	return f
+}
+
+// Name of the remote (as passed into NewFs)
+func (f *Fs) Name() string {
+	return f.name
+}
+
+// Root of the remote (as passed into NewFs)
+func (f *Fs) Root() string {
+	return f.root
+}
+
+// String returns a description of the FS
+func (f *Fs) String() string {
+	return fmt.Sprintf("Mock file system at %s", f.root)
+}
+
+// Precision of the ModTimes in this Fs
+func (f *Fs) Precision() time.Duration {
+	return time.Second
+}
+
+// Hashes returns the supported hash types of the filesystem
+func (f *Fs) Hashes() hash.Set {
+	return hash.NewHashSet()
+}
+
+// Features returns the optional features of this Fs
+func (f *Fs) Features() *fs.Features {
+	return f.features
+}
+
+// List the objects and directories in dir into entries.  The
+// entries can be returned in any order but should be for a
+// complete directory.
+//
+// dir should be "" to list the root, and should not have
+// trailing slashes.
+//
+// This should return ErrDirNotFound if the directory isn't
+// found.
+func (f *Fs) List(dir string) (entries fs.DirEntries, err error) {
+	return nil, nil
+}
+
+// NewObject finds the Object at remote.  If it can't be found
+// it returns the error ErrorObjectNotFound.
+func (f *Fs) NewObject(remote string) (fs.Object, error) {
+	return nil, fs.ErrorObjectNotFound
+}
+
+// Put in to the remote path with the modTime given of the given size
+//
+// May create the object even if it returns an error - if so
+// will return the object and the error, otherwise will return
+// nil and the error
+func (f *Fs) Put(in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) (fs.Object, error) {
+	return nil, ErrNotImplemented
+}
+
+// Mkdir makes the directory (container, bucket)
+//
+// Shouldn't return an error if it already exists
+func (f *Fs) Mkdir(dir string) error {
+	return ErrNotImplemented
+}
+
+// Rmdir removes the directory (container, bucket) if empty
+//
+// Return an error if it doesn't exist or isn't empty
+func (f *Fs) Rmdir(dir string) error {
+	return ErrNotImplemented
+}
+
+// Assert it is the correct type
+var _ fs.Fs = (*Fs)(nil)