Add ImageFsInfo support

Signed-off-by: Lantao Liu <lantaol@google.com>

pkg/store/image/image.go

@@ -92,8 +92,8 @@ func (s *Store) List() []Image {
 	s.lock.RLock()
 	defer s.lock.RUnlock()
 	var images []Image
-	for _, sb := range s.images {
-		images = append(images, sb)
+	for _, i := range s.images {
+		images = append(images, i)
 	}
 	return images
 }

pkg/store/image/image_test.go

@@ -99,7 +99,7 @@ func TestImageStore(t *testing.T) {
 	imgs = s.List()
 	assert.Len(imgs, 2)
 
-	t.Logf("get should return nil after deletion")
+	t.Logf("get should return empty struct and ErrNotExist after deletion")
 	img, err := s.Get(testID)
 	assert.Equal(Image{}, img)
 	assert.Equal(store.ErrNotExist, err)