--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-remotefilelog-bundle2-legacy.t	Thu Sep 27 13:03:19 2018 -0400
@@ -0,0 +1,93 @@
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
+  $ . "$TESTDIR/remotefilelog-library.sh"
+
+generaldelta to generaldelta interactions with bundle2 but legacy clients
+without changegroup2 support
+  $ cat > testcg2.py << EOF
+  > from mercurial import changegroup, registrar, util
+  > import sys
+  > cmdtable = {}
+  > command = registrar.command(cmdtable)
+  > @command('testcg2', norepo=True)
+  > def testcg2(ui):
+  >     if not util.safehasattr(changegroup, 'cg2packer'):
+  >         sys.exit(80)
+  > EOF
+  $ cat >> $HGRCPATH << EOF
+  > [extensions]
+  > testcg2 = $TESTTMP/testcg2.py
+  > EOF
+  $ hg testcg2 || exit 80
+
+  $ cat > disablecg2.py << EOF
+  > from mercurial import changegroup, util, error
+  > deleted = False
+  > def reposetup(ui, repo):
+  >     global deleted
+  >     if deleted:
+  >         return
+  >     packermap = changegroup._packermap
+  >     # protect against future changes
+  >     if len(packermap) != 3:
+  >         raise error.Abort('packermap has %d versions, expected 3!' % len(packermap))
+  >     for k in ['01', '02', '03']:
+  >         if not packermap.get(k):
+  >             raise error.Abort("packermap doesn't have key '%s'!" % k)
+  > 
+  >     del packermap['02']
+  >     deleted = True
+  > EOF
+
+  $ hginit master
+  $ grep generaldelta master/.hg/requires
+  generaldelta
+  $ cd master
+preferuncompressed = False so that we can make both generaldelta and non-generaldelta clones
+  $ cat >> .hg/hgrc <<EOF
+  > [remotefilelog]
+  > server=True
+  > [experimental]
+  > bundle2-exp = True
+  > [server]
+  > preferuncompressed = False
+  > EOF
+  $ echo x > x
+  $ hg commit -qAm x
+
+  $ cd ..
+
+  $ hgcloneshallow ssh://user@dummy/master shallow -q --pull --config experimental.bundle2-exp=True
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
+  $ cd shallow
+  $ cat >> .hg/hgrc << EOF
+  > [extensions]
+  > disablecg2 = $TESTTMP/disablecg2.py
+  > EOF
+
+  $ cd ../master
+  $ echo y > y
+  $ hg commit -qAm y
+
+  $ cd ../shallow
+  $ hg pull -u
+  pulling from ssh://user@dummy/master
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 0 changes to 0 files
+  new changesets d34c38483be9
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
+
+  $ echo a > a
+  $ hg commit -qAm a
+  $ hg push
+  pushing to ssh://user@dummy/master
+  searching for changes
+  remote: adding changesets
+  remote: adding manifests
+  remote: adding file changes
+  remote: added 1 changesets with 1 changes to 1 files