diff -r 9d5ddf55415b -r 9c4cbbb0fc51 tests/test-lfs-serve.t
--- a/tests/test-lfs-serve.t	Tue Oct 09 21:53:21 2018 -0400
+++ b/tests/test-lfs-serve.t	Thu Oct 04 00:17:26 2018 -0400
@@ -35,6 +35,26 @@
   $ hg init server
   $ SERVER_REQUIRES="$TESTTMP/server/.hg/requires"
 
+  $ cat > $TESTTMP/debugprocessors.py <<EOF
+  > from mercurial import (
+  >     cmdutil,
+  >     commands,
+  >     pycompat,
+  >     registrar,
+  > )
+  > cmdtable = {}
+  > command = registrar.command(cmdtable)
+  > @command(b'debugprocessors', [], b'FILE')
+  > def debugprocessors(ui, repo, file_=None, **opts):
+  >     opts = pycompat.byteskwargs(opts)
+  >     opts[b'changelog'] = False
+  >     opts[b'manifest'] = False
+  >     opts[b'dir'] = False
+  >     rl = cmdutil.openrevlog(repo, b'debugprocessors', file_, opts)
+  >     for flag, proc in rl._flagprocessors.iteritems():
+  >         ui.status(b"registered processor '%#x'\n" % (flag))
+  > EOF
+
 Skip the experimental.changegroup3=True config.  Failure to agree on this comes
 first, and causes a "ValueError: no common changegroup version" or "abort:
 HTTP Error 500: Internal Server Error", if the extension is only loaded on one
@@ -42,6 +62,8 @@
 for flag '0x2000'!" if the extension is only loaded on one side (possibly also
 masked by the Internal Server Error message).
   $ cat >> $HGRCPATH <<EOF
+  > [extensions]
+  > debugprocessors = $TESTTMP/debugprocessors.py
   > [experimental]
   > lfs.disableusercache = True
   > [lfs]
@@ -51,6 +73,8 @@
   > push_ssl=False
   > EOF
 
+  $ cp $HGRCPATH $HGRCPATH.orig
+
 #if lfsremote-on
   $ hg --config extensions.lfs= -R server \
   >    serve -p $HGPORT -d --pid-file=hg.pid --errorlog=$TESTTMP/errors.log
@@ -307,6 +331,103 @@
   $ hg identify http://localhost:$HGPORT
   c729025cc5e3
 
+  $ mv $HGRCPATH $HGRCPATH.tmp
+  $ cp $HGRCPATH.orig $HGRCPATH
+
+  >>> from __future__ import absolute_import
+  >>> from hgclient import check, readchannel, runcommand
+  >>> @check
+  ... def checkflags(server):
+  ...     readchannel(server)
+  ...     print('')
+  ...     print('# LFS required- both lfs and non-lfs revlogs have 0x2000 flag')
+  ...     runcommand(server, ['debugprocessors', 'lfs.bin', '-R',
+  ...                '../server'])
+  ...     runcommand(server, ['debugprocessors', 'nonlfs2.txt', '-R',
+  ...                '../server'])
+  ...     runcommand(server, ['config', 'extensions', '--cwd',
+  ...                '../server'])
+  ... 
+  ...     print("\n# LFS not enabled- revlogs don't have 0x2000 flag")
+  ...     runcommand(server, ['debugprocessors', 'nonlfs3.txt'])
+  ...     runcommand(server, ['config', 'extensions'])
+  
+  # LFS required- both lfs and non-lfs revlogs have 0x2000 flag
+  *** runcommand debugprocessors lfs.bin -R ../server
+  registered processor '0x8000'
+  registered processor '0x2000'
+  *** runcommand debugprocessors nonlfs2.txt -R ../server
+  registered processor '0x8000'
+  registered processor '0x2000'
+  *** runcommand config extensions --cwd ../server
+  extensions.debugprocessors=$TESTTMP/debugprocessors.py
+  extensions.lfs=
+  
+  # LFS not enabled- revlogs don't have 0x2000 flag
+  *** runcommand debugprocessors nonlfs3.txt
+  registered processor '0x8000'
+  *** runcommand config extensions
+  extensions.debugprocessors=$TESTTMP/debugprocessors.py
+
+  $ rm $HGRCPATH
+  $ mv $HGRCPATH.tmp $HGRCPATH
+
+  $ hg clone $TESTTMP/client $TESTTMP/nonlfs -qr 0 --config extensions.lfs=
+  $ cat >> $TESTTMP/nonlfs/.hg/hgrc <<EOF
+  > [extensions]
+  > lfs = !
+  > EOF
+
+  >>> from __future__ import absolute_import, print_function
+  >>> from hgclient import check, readchannel, runcommand
+  >>> @check
+  ... def checkflags2(server):
+  ...     readchannel(server)
+  ...     print('')
+  ...     print('# LFS enabled- both lfs and non-lfs revlogs have 0x2000 flag')
+  ...     runcommand(server, ['debugprocessors', 'lfs.bin', '-R',
+  ...                '../server'])
+  ...     runcommand(server, ['debugprocessors', 'nonlfs2.txt', '-R',
+  ...                '../server'])
+  ...     runcommand(server, ['config', 'extensions', '--cwd',
+  ...                '../server'])
+  ... 
+  ...     print('\n# LFS enabled without requirement- revlogs have 0x2000 flag')
+  ...     runcommand(server, ['debugprocessors', 'nonlfs3.txt'])
+  ...     runcommand(server, ['config', 'extensions'])
+  ... 
+  ...     print("\n# LFS disabled locally- revlogs don't have 0x2000 flag")
+  ...     runcommand(server, ['debugprocessors', 'nonlfs.txt', '-R',
+  ...                '../nonlfs'])
+  ...     runcommand(server, ['config', 'extensions', '--cwd',
+  ...                '../nonlfs'])
+  
+  # LFS enabled- both lfs and non-lfs revlogs have 0x2000 flag
+  *** runcommand debugprocessors lfs.bin -R ../server
+  registered processor '0x8000'
+  registered processor '0x2000'
+  *** runcommand debugprocessors nonlfs2.txt -R ../server
+  registered processor '0x8000'
+  registered processor '0x2000'
+  *** runcommand config extensions --cwd ../server
+  extensions.debugprocessors=$TESTTMP/debugprocessors.py
+  extensions.lfs=
+  
+  # LFS enabled without requirement- revlogs have 0x2000 flag
+  *** runcommand debugprocessors nonlfs3.txt
+  registered processor '0x8000'
+  registered processor '0x2000'
+  *** runcommand config extensions
+  extensions.debugprocessors=$TESTTMP/debugprocessors.py
+  extensions.lfs=
+  
+  # LFS disabled locally- revlogs don't have 0x2000 flag
+  *** runcommand debugprocessors nonlfs.txt -R ../nonlfs
+  registered processor '0x8000'
+  *** runcommand config extensions --cwd ../nonlfs
+  extensions.debugprocessors=$TESTTMP/debugprocessors.py
+  extensions.lfs=!
+
 --------------------------------------------------------------------------------
 Case #6: client with lfs content and the extension enabled; server with
 lfs content, and the extension enabled.