.

go/internal/xtesting/xtesting.go

@@ -138,6 +138,17 @@ func ZPyCommitRaw(zurl string, at zodb.Tid, objv ...ZRawObject) (_ zodb.Tid, err
 
 // ---- tests for storage drivers ----
 
+// DrvTestEmptyDB verifies that zdrv works correctly on empty database.
+func DrvTestEmptyDB(t *testing.T, zdrv zodb.IStorageDriver) {
+	X := FatalIf(t)
+	ctx := context.Background()
+	head, err := zdrv.Sync(ctx); X(err)
+	headOk := zodb.Tid(0)
+	if head != headOk {
+		t.Errorf("head=%s  ; expected %s", head, headOk)
+	}
+}
+
 // state of an object in the database for some particular revision
 type objState struct {
 	tid  zodb.Tid

go/neo/client_test.go

@@ -183,3 +183,11 @@ func withNEOSrv(t *testing.T, f func(t *testing.T, nsrv NEOSrv)) { // XXX +optv
 
 	// TODO NEO/go
 }
+
+// XXX withNeo
+
+func TestEmptyDB(t *testing.T) {
+	withNEO(t, func(t *testing.T, nsrv NEOSrv, n *Client) {
+		xtesting.DrvTestEmptyDB(t, n)
+	})
+}

go/zodb/storage/zeo/zeo_test.go

@@ -247,13 +247,7 @@ func TestHandshake(t *testing.T) {
 // verify that connection to ZEO server with empty DB works ok.
 func TestEmptyDB(t *testing.T) {
 	withZEO(t, func(t *testing.T, zsrv ZEOSrv, z *zeo) {
-		X := xtesting.FatalIf(t)
-		ctx := context.Background()
-		head, err := z.Sync(ctx); X(err)
-		headOk := zodb.Tid(0)
-		if head != headOk {
-			t.Errorf("head=%s  ; expected %s", head, headOk)
-		}
+		xtesting.DrvTestEmptyDB(t, z)
 	})
 }