.

wcfs/internal/xbtree/δbtail_test.go

@@ -1460,7 +1460,8 @@ type tTreeCommit struct {
 	δZ         *zodb.EventCommit   // raw ZODB changes; δZ.tid == at
 	xkv        RBucketSet          // full tree state as of @at
 	δxkv       map[Key]Δstring     // full tree-diff against parent
-	blkDataTab map[zodb.Oid]string // full snapshot of all ZBlk data @at
+	blkDataTab map[zodb.Oid]string // full snapshot of all ZBlk data @at  XXX -> zblkDataTab
+//	δzblkData  map[zodb.Oid]Δstring // full diff for zblkData against parent XXX ?
 }
 
 // tNewTreeEnv creates new  tTreeEnv.

wcfs/internal/zdata/δftail_test.go

+// Copyright (C) 2019-2021  Nexedi SA and Contributors.
+//                          Kirill Smelkov <kirr@nexedi.com>
+//
+// This program is free software: you can Use, Study, Modify and Redistribute
+// it under the terms of the GNU General Public License version 3, or (at your
+// option) any later version, as published by the Free Software Foundation.
+//
+// You can also Link and Combine this program with other software covered by
+// the terms of any of the Free Software licenses or any of the Open Source
+// Initiative approved licenses and Convey the resulting work. Corresponding
+// source of such a combination shall include the source code for all other
+// software used.
+//
+// This program is distributed WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+//
+// See COPYING file for full licensing terms.
+// See https://www.nexedi.com/licensing for rationale and options.
+
+package zdata
+
+import (
+	"testing"
+)
+
+func TestΔFtail(t *testing.T) {
+}
+
+// XXX TestΔFtailRandom(t *testing.T) {
+//}