refactor feed updating

src/storage/feed_test.go

@@ -54,9 +54,14 @@ func TestUpdateFeed(t *testing.T) {
 	folder := db.CreateFolder("test")
 	icon := []byte("icon")
 
-	db.RenameFeed(feed1.Id, "newtitle")
-	db.UpdateFeedFolder(feed1.Id, &folder.Id)
-	db.UpdateFeedIcon(feed1.Id, &icon)
+	title := "newtitle"
+	db.UpdateFeed(feed1.Id, UpdateFeedParams{
+		Title:          &title,
+		FolderID:       &folder.Id,
+		UpdateFolderID: true,
+		Icon:           &icon,
+		UpdateIcon:     true,
+	})
 
 	feed2 := db.GetFeed(feed1.Id)
 	if feed2.Title != "newtitle" {