diff -r 7d2a7f8e9da4 -r 257afe5489d4 tests/test-largefiles.t
--- a/tests/test-largefiles.t	Thu Mar 21 23:27:37 2013 +0100
+++ b/tests/test-largefiles.t	Wed Apr 10 02:27:35 2013 +0900
@@ -180,6 +180,34 @@
   $ cat sub/large4
   large22
 
+Test repo method wrapping detection
+
+  $ cat > $TESTTMP/wrapping1.py <<EOF
+  > from hgext import largefiles
+  > def reposetup(ui, repo):
+  >     class derived(repo.__class__):
+  >         def push(self, *args, **kwargs):
+  >             return super(derived, self).push(*args, **kwargs)
+  >     repo.__class__ = derived
+  >     largefiles.reposetup(ui, repo)
+  > uisetup = largefiles.uisetup
+  > EOF
+  $ hg --config extensions.largefiles=$TESTTMP/wrapping1.py status
+  largefiles: repo method 'push' appears to have already been wrapped by another extension: largefiles may behave incorrectly
+
+  $ cat > $TESTTMP/wrapping2.py <<EOF
+  > from hgext import largefiles
+  > def reposetup(ui, repo):
+  >     orgpush = repo.push
+  >     def push(*args, **kwargs):
+  >         return orgpush(*args, **kwargs)
+  >     repo.push = push
+  >     largefiles.reposetup(ui, repo)
+  > uisetup = largefiles.uisetup
+  > EOF
+  $ hg --config extensions.largefiles=$TESTTMP/wrapping2.py status
+  largefiles: repo method 'push' appears to have already been wrapped by another extension: largefiles may behave incorrectly
+
 Test copies and moves from a directory other than root (issue3516)
 
   $ cd ..