tests/test-completion.t

--- a/tests/test-completion.t	Mon Mar 13 13:06:37 2017 -0700
+++ b/tests/test-completion.t	Tue Mar 14 13:10:30 2017 -0700
@@ -358,3 +358,18 @@
   fee
   fie
   fo
+
+Test debuglabelcomplete, a deprecated name for debugnamecomplete that is still
+used for completions in some shells.
+
+  $ hg debuglabelcomplete
+  Fum
+  default
+  fee
+  fie
+  fo
+  tip
+  $ hg debuglabelcomplete f
+  fee
+  fie
+  fo