diff -r 6bdee4bc181a -r d71e0ba34d9b tests/test-debugcommands.t
--- a/tests/test-debugcommands.t	Mon Sep 24 19:23:50 2018 +0900
+++ b/tests/test-debugcommands.t	Wed Aug 08 23:17:16 2018 -0700
@@ -177,6 +177,16 @@
 debugdelta chain basic output
 
 #if reporevlogstore
+  $ hg debugindexstats
+  node trie capacity: 4
+  node trie count: 2
+  node trie depth: 1
+  node trie last rev scanned: -1
+  node trie lookups: 4
+  node trie misses: 1
+  node trie splits: 1
+  revs in memory: 3
+
   $ hg debugdeltachain -m
       rev  chain# chainlen     prev   delta       size    rawsize  chainsize     ratio   lindist extradist extraratio
         0       1        1       -1    base         44         43         44   1.02326        44         0    0.00000