.

go/zodb/storage/demo/demo_test.go

@@ -144,6 +144,15 @@ func withDemo(t *testing.T, f func(t *testing.T, ddat *DemoData, ddrv *Storage),
 	}, optv...)
 }
 
+func TestURL(t *testing.T) {
+	withDemo(t, func(t *testing.T, ddat *DemoData, ddrv *Storage) {
+		zurl   := ddrv.URL()
+		zurlOk := ddat.URL()
+		if zurl != zurlOk {
+			t.Fatalf("bad zurl:\nhave: %s\nwant: %s", zurl, zurlOk)
+		}
+	})
+}
 
 func TestEmptyDB(t *testing.T) {
 	withDemo(t, func(t *testing.T, _ *DemoData, ddrv *Storage) {

go/zodb/storage/fs1/filestorage.go

@@ -132,7 +132,7 @@ func (fs *FileStorage) LastOid(_ context.Context) (zodb.Oid, error) {
 }
 
 func (fs *FileStorage) URL() string {
-	return fs.file.Name() // XXX + file://
+	return "file://" + fs.file.Name()
 }
 
 // freelist(DataHeader)