--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-remotefilelog-prefetch.t	Thu Sep 27 13:03:19 2018 -0400
@@ -0,0 +1,266 @@
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
+  $ . "$TESTDIR/remotefilelog-library.sh"
+
+  $ hginit master
+  $ cd master
+  $ cat >> .hg/hgrc <<EOF
+  > [remotefilelog]
+  > server=True
+  > EOF
+  $ echo x > x
+  $ echo z > z
+  $ hg commit -qAm x
+  $ echo x2 > x
+  $ echo y > y
+  $ hg commit -qAm y
+  $ hg bookmark foo
+
+  $ cd ..
+
+# prefetch a revision
+
+  $ hgcloneshallow ssh://user@dummy/master shallow --noupdate
+  streaming all changes
+  2 files to transfer, 528 bytes of data
+  transferred 528 bytes in * seconds (*/sec) (glob)
+  searching for changes
+  no changes found
+  $ cd shallow
+
+  $ hg prefetch -r 0
+  2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
+
+  $ hg cat -r 0 x
+  x
+
+# prefetch with base
+
+  $ clearcache
+  $ hg prefetch -r 0::1 -b 0
+  2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
+
+  $ hg cat -r 1 x
+  x2
+  $ hg cat -r 1 y
+  y
+
+  $ hg cat -r 0 x
+  x
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
+
+  $ hg cat -r 0 z
+  z
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
+
+  $ hg prefetch -r 0::1 --base 0
+  $ hg prefetch -r 0::1 -b 1
+  $ hg prefetch -r 0::1
+
+# prefetch a range of revisions
+
+  $ clearcache
+  $ hg prefetch -r 0::1
+  4 files fetched over 1 fetches - (4 misses, 0.00% hit ratio) over *s (glob)
+
+  $ hg cat -r 0 x
+  x
+  $ hg cat -r 1 x
+  x2
+
+# prefetch certain files
+
+  $ clearcache
+  $ hg prefetch -r 1 x
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
+
+  $ hg cat -r 1 x
+  x2
+
+  $ hg cat -r 1 y
+  y
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
+
+# prefetch on pull when configured
+
+  $ printf "[remotefilelog]\npullprefetch=bookmark()\n" >> .hg/hgrc
+  $ hg strip tip
+  saved backup bundle to $TESTTMP/shallow/.hg/strip-backup/109c3a557a73-3f43405e-backup.hg (glob)
+
+  $ clearcache
+  $ hg pull
+  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
+  updating bookmark foo
+  new changesets 109c3a557a73
+  (run 'hg update' to get a working copy)
+  prefetching file contents
+  3 files fetched over 1 fetches - (3 misses, 0.00% hit ratio) over *s (glob)
+
+  $ hg up tip
+  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
+
+# prefetch only fetches changes not in working copy
+
+  $ hg strip tip
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  saved backup bundle to $TESTTMP/shallow/.hg/strip-backup/109c3a557a73-3f43405e-backup.hg (glob)
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
+  $ clearcache
+
+  $ hg pull
+  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
+  updating bookmark foo
+  new changesets 109c3a557a73
+  (run 'hg update' to get a working copy)
+  prefetching file contents
+  2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
+
+# Make some local commits that produce the same file versions as are on the
+# server. To simulate a situation where we have local commits that were somehow
+# pushed, and we will soon pull.
+
+  $ hg prefetch -r 'all()'
+  2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
+  $ hg strip -q -r 0
+  $ echo x > x
+  $ echo z > z
+  $ hg commit -qAm x
+  $ echo x2 > x
+  $ echo y > y
+  $ hg commit -qAm y
+
+# prefetch server versions, even if local versions are available
+
+  $ clearcache
+  $ hg strip -q tip
+  $ hg pull
+  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
+  updating bookmark foo
+  new changesets 109c3a557a73
+  1 local changesets published (?)
+  (run 'hg update' to get a working copy)
+  prefetching file contents
+  2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
+
+  $ cd ..
+
+# Prefetch unknown files during checkout
+
+  $ hgcloneshallow ssh://user@dummy/master shallow2
+  streaming all changes
+  2 files to transfer, 528 bytes of data
+  transferred 528 bytes in * seconds * (glob)
+  searching for changes
+  no changes found
+  updating to branch default
+  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over * (glob)
+  $ cd shallow2
+  $ hg up -q null
+  $ echo x > x
+  $ echo y > y
+  $ echo z > z
+  $ clearcache
+  $ hg up tip
+  x: untracked file differs
+  3 files fetched over 1 fetches - (3 misses, 0.00% hit ratio) over * (glob)
+  abort: untracked files in working directory differ from files in requested revision
+  [255]
+  $ hg revert --all
+
+# Test batch fetching of lookup files during hg status
+  $ hg up --clean tip
+  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg debugrebuilddirstate
+  $ clearcache
+  $ hg status
+  3 files fetched over 1 fetches - (3 misses, 0.00% hit ratio) over * (glob)
+
+# Prefetch during addrename detection
+  $ hg up -q --clean tip
+  $ hg revert --all
+  $ mv x x2
+  $ mv y y2
+  $ mv z z2
+  $ clearcache
+  $ hg addremove -s 50 > /dev/null
+  3 files fetched over 1 fetches - (3 misses, 0.00% hit ratio) over * (glob)
+
+  $ cd ..
+
+# Prefetch packs
+  $ hgcloneshallow ssh://user@dummy/master packprefetch
+  streaming all changes
+  2 files to transfer, 528 bytes of data
+  transferred 528 bytes in * seconds (*/sec) (glob)
+  searching for changes
+  no changes found
+  updating to branch default
+  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cd packprefetch
+  $ cat >> .hg/hgrc <<EOF
+  > [remotefilelog]
+  > fetchpacks=True
+  > backgroundrepack=True
+  > EOF
+  $ clearcache
+  $ hg prefetch -r .
+  3 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ find $TESTTMP/hgcache -type f | sort
+  $TESTTMP/hgcache/master/packs/47d8f1b90a73af4ff8af19fcd10bdc027b6a881a.histidx
+  $TESTTMP/hgcache/master/packs/47d8f1b90a73af4ff8af19fcd10bdc027b6a881a.histpack
+  $TESTTMP/hgcache/master/packs/8c654541e4f20141a894bbfe428e36fc92202e39.dataidx
+  $TESTTMP/hgcache/master/packs/8c654541e4f20141a894bbfe428e36fc92202e39.datapack
+  $ hg cat -r . x
+  x2
+  $ hg cat -r . y
+  y
+  $ hg cat -r . z
+  z
+
+# Prefetch packs that include renames
+  $ cd ../master
+  $ hg mv z z2
+  $ hg commit -m 'move z -> z2'
+  $ cd ../packprefetch
+  $ hg pull -q
+  (running background incremental repack)
+  $ hg prefetch -r tip
+  1 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ hg up tip -q
+  $ hg log -f z2 -T '{desc}\n'
+  move z -> z2
+  x
+
+# Revert across double renames. Note: the scary "abort", error is because
+# https://bz.mercurial-scm.org/5419 .
+
+  $ clearcache
+  $ hg mv y y2
+  $ hg mv x x2
+  $ hg mv z2 z3
+  $ hg revert -a -r 1 || true
+  forgetting x2
+  forgetting y2
+  forgetting z3
+  adding z
+  undeleting x
+  undeleting y
+  3 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  abort: z2@109c3a557a73: not found in manifest! (?)