.

wcfs/internal/xbtree/δbtail_test.go

@@ -1131,7 +1131,7 @@ func xverifyΔBTail_rebuild_TR(t *testing.T, db *zodb.DB, δbtail *ΔBtail, tj *
 
 	δbtail.rebuildAll()
 
-	subj += "+ rebuild"
+	subj += " + rebuild"
 	δbtail.assertTrack(t, subj, trackSetAfterRebuild, ø)
 	// XXX assert vδB=[δ1/T(keys)]
 
@@ -1147,8 +1147,8 @@ func assertΔTtail(t *testing.T, subj string, δbtail *ΔBtail, db *zodb.DB, tj
 	// XXX +KVAtTail, +lastRevOf
 
 	l := len(vδTok)
-	vatOK  := []zodb.Tid{}
-	vδTok_ := []map[Key]Δstring{}
+	var vatOK  []zodb.Tid
+	var vδTok_ []map[Key]Δstring
 	t0 := tj
 	for i := 0; i<l; i++ {
 		// empty vδTok entries means they should be absent in vδT
@@ -1162,16 +1162,19 @@ func assertΔTtail(t *testing.T, subj string, δbtail *ΔBtail, db *zodb.DB, tj
 //	lo := t0.at
 //	hi := tj.at
 //	vδToid := δbtail.SliceByRootRev(treeRoot, lo, hi)
-	δTtail := δbtail.vδTbyRoot[treeRoot]
-	vδToid := δTtail.vδT
+	δTtail, ok := δbtail.vδTbyRoot[treeRoot]
+	var vδToid []ΔTree
+	if ok {
+		vδToid = δTtail.vδT
+	}
 
 	l = len(vδToid)
-	vat := make([]zodb.Tid, l)
-	vδT := []map[Key]Δstring{}
+	var vat []zodb.Tid
+	var vδT []map[Key]Δstring
 //	atPrev := lo
 	atPrev := t0.at
-	for i, δToid := range vδToid {
-		vat[i] = δToid.Rev
+	for _, δToid := range vδToid {
+		vat = append(vat, δToid.Rev)
 		δT := XGetδKV(db, atPrev, δToid.Rev, δToid.ΔKV) // {} k -> δ(ZBlk(oid).data)
 		vδT = append(vδT, δT)
 		atPrev = δToid.Rev