.

wcfs/internal/xbtree/δbtail_test.go

@@ -940,10 +940,12 @@ func (δBtail *ΔBtail) assertTrack(t *testing.T, subj string, trackSetOK PPTree
 	_assertTrack(t, subj + ": vδT.trackNew", δTtail.trackNew, trackNewOK)
 }
 
-// xverifyΔBTail_rebuild verifies δBtail.rebuild during t0->t1->t2 transition.
+// xverifyΔBTail_rebuild verifies ΔBtail.rebuild during t0->t1->t2 transition.
 //
 // t0->t1 exercises from-scratch rebuild,
 // t1->t2 further exercises incremental rebuild.
+//
+// It also exercises rebuild phase of ΔBtail.Update.
 func xverifyΔBTail_rebuild(t *testing.T, db *zodb.DB, treeRoot zodb.Oid, t0, t1, t2 *tTreeCommit) {
 	// XXX handle DEL
 	// XXX Update -> Track -> rebuild ...