tests/test-debugindexdot.t

--- a/tests/test-debugindexdot.t	Tue Aug 14 16:28:21 2018 +0000
+++ b/tests/test-debugindexdot.t	Mon Aug 20 21:01:05 2018 +0000
@@ -13,6 +13,24 @@
   $ HGMERGE=true hg merge -q
   $ hg ci -m merge -d '3 0'
 
+  $ hg debugindexdot -c
+  digraph G {
+  	-1 -> 0
+  	0 -> 1
+  	0 -> 2
+  	2 -> 3
+  	1 -> 3
+  }
+
+  $ hg debugindexdot -m
+  digraph G {
+  	-1 -> 0
+  	0 -> 1
+  	0 -> 2
+  	2 -> 3
+  	1 -> 3
+  }
+
   $ hg debugindexdot a
   digraph G {
   	-1 -> 0