--- a/tests/test-profile.t	Thu Oct 20 23:16:32 2016 +0900
+++ b/tests/test-profile.t	Fri Nov 04 20:50:38 2016 -0700
@@ -47,4 +47,49 @@
 
 #endif
 
+Install an extension that can sleep and guarantee a profiler has time to run
+
+  $ cat >> sleepext.py << EOF
+  > import time
+  > from mercurial import cmdutil, commands
+  > cmdtable = {}
+  > command = cmdutil.command(cmdtable)
+  > @command('sleep', [], 'hg sleep')
+  > def sleep(ui, *args, **kwargs):
+  >     time.sleep(0.1)
+  > EOF
+
+  $ cat >> $HGRCPATH << EOF
+  > [extensions]
+  > sleep = `pwd`/sleepext.py
+  > EOF
+
+statistical profiler works
+
+  $ HGPROF=stat hg --profile sleep 2>../out
+  $ grep Sample ../out
+  Sample count: \d+ (re)
+
+Various statprof formatters work
+
+  $ HGPROF=stat hg --profile --config profiling.statformat=byline sleep 2>../out
+  $ head -n 1 ../out
+    %   cumulative      self          
+  $ grep Sample ../out
+  Sample count: \d+ (re)
+
+  $ HGPROF=stat hg --profile --config profiling.statformat=bymethod sleep 2>../out
+  $ head -n 1 ../out
+    %   cumulative      self          
+  $ grep Sample ../out
+  Sample count: \d+ (re)
+
+  $ HGPROF=stat hg --profile --config profiling.statformat=hotpath sleep 2>../out
+  $ grep Sample ../out
+  Sample count: \d+ (re)
+
+  $ HGPROF=stat hg --profile --config profiling.statformat=json sleep 2>../out
+  $ cat ../out
+  \[\[\d+.* (re)
+
   $ cd ..