# HG changeset patch
# User Matt Harbison <matt_harbison@yahoo.com>
# Date 1514059644 18000
# Node ID bbcd2e478391b764759d52712ff77f639ab0700a
# Parent  67611e06ff08dedec15bada7ab863c3d7221873f
test-lfs: add tests covering http exchanges

This tries to test every combination of having the extension enabled/disabled
on each side, and then push/pull/clone/identify lfs and non-lfs content.  SSH is
ignored here, because there's enough going on as it is.

The root issue here is again that requirements are not exchanged and preserved
on push/pull/clone.  Doing so should eliminate the cryptic error messages when
using `hg serve`.  The 500 server error is triggered by "ValueError: no common
changegroup version", because the extension forces changegroup3.  Or, if
changegroup3 is enabled manually, it is triggered by "abort: missing processor
for flag '0x2000'!".

Sadly, run-tests.py doesn't support conditionalizing the exit code like it does
lines of output.  Therefore, a couple of tests blot out the exit code by
appending "|| true", since these failures will go away shortly anyway.

diff -r 67611e06ff08 -r bbcd2e478391 tests/test-lfs-serve.t
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-lfs-serve.t	Sat Dec 23 15:07:24 2017 -0500
@@ -0,0 +1,292 @@
+#testcases lfsremote-on lfsremote-off
+#require serve
+
+This test splits `hg serve` with and without using the extension into separate
+tests cases.  The tests are broken down as follows, where "LFS"/"No-LFS"
+indicates whether or not there are commits that use an LFS file, and "D"/"E"
+indicates whether or not the extension is loaded.  The "X" cases are not tested
+individually, because the lfs requirement causes the process to bail early if
+the extension is disabled.
+
+.                        Server
+.
+.                    No-LFS        LFS
+.            +----------------------------+
+.            |   ||  D  |  E  |  D  |  E  |
+.            |---++=======================|
+.  C         | D || N/A | #1  |  X  | #4  |
+.  l    No   +---++-----------------------|
+.  i    LFS  | E || #2  | #2  |  X  | #5  |
+.  e         +---++-----------------------|
+.  n         | D ||  X  |  X  |  X  |  X  |
+.  t    LFS  |---++-----------------------|
+.            | E || #3  | #3  |  X  | #6  |
+.            |---++-----------------------+
+
+  $ hg init server
+  $ SERVER_REQUIRES="$TESTTMP/server/.hg/requires"
+
+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
+side.  If that *is* enabled, the subsequent failure is "abort: missing processor
+for flag '0x2000'!" if the extension is only loaded on one side (possibly also
+masked by the Internal Server Error message).
+  $ cat >> $HGRCPATH <<EOF
+  > [lfs]
+  > url=file:$TESTTMP/dummy-remote/
+  > threshold=10
+  > [web]
+  > allow_push=*
+  > push_ssl=False
+  > EOF
+
+#if lfsremote-on
+  $ hg --config extensions.lfs= -R server \
+  >    serve -p $HGPORT -d --pid-file=hg.pid --errorlog=$TESTTMP/errors.log
+#else
+  $ hg --config extensions.lfs=! -R server \
+  >    serve -p $HGPORT -d --pid-file=hg.pid --errorlog=$TESTTMP/errors.log
+#endif
+
+  $ cat hg.pid >> $DAEMON_PIDS
+  $ hg clone -q http://localhost:$HGPORT client
+  $ grep 'lfs' client/.hg/requires $SERVER_REQUIRES
+  [1]
+
+--------------------------------------------------------------------------------
+Case #1: client with non-lfs content and the extension disabled; server with
+non-lfs content, and the extension enabled.
+
+  $ cd client
+  $ echo 'non-lfs' > nonlfs.txt
+  $ hg ci -Aqm 'non-lfs'
+  $ grep 'lfs' .hg/requires $SERVER_REQUIRES
+  [1]
+
+#if lfsremote-on
+
+  $ hg push -q
+  $ grep 'lfs' .hg/requires $SERVER_REQUIRES
+  [1]
+
+TODO: fail more gracefully, or don't mandate changegroup3 for non-lfs repos.
+
+  $ hg clone -q http://localhost:$HGPORT $TESTTMP/client1_clone
+  abort: HTTP Error 500: Internal Server Error
+  [255]
+  $ grep 'lfs' $TESTTMP/client1_clone/.hg/requires $SERVER_REQUIRES
+  grep: $TESTTMP/client1_clone/.hg/requires: $ENOENT$
+  [2]
+
+TODO: fail more gracefully, or don't mandate changegroup3 for non-lfs repos.
+
+  $ hg init $TESTTMP/client1_pull
+  $ hg -R $TESTTMP/client1_pull pull -q http://localhost:$HGPORT
+  abort: HTTP Error 500: Internal Server Error
+  [255]
+  $ grep 'lfs' $TESTTMP/client1_pull/.hg/requires $SERVER_REQUIRES
+  [1]
+
+  $ hg identify http://localhost:$HGPORT
+  d437e1d24fbd
+
+#endif
+
+--------------------------------------------------------------------------------
+Case #2: client with non-lfs content and the extension enabled; server with
+non-lfs content, and the extension state controlled by #testcases.
+
+  $ cat >> $HGRCPATH <<EOF
+  > [extensions]
+  > lfs =
+  > EOF
+  $ echo 'non-lfs' > nonlfs2.txt
+  $ hg ci -Aqm 'non-lfs file with lfs client'
+
+TODO: fail more gracefully here
+  $ hg push -q 2>&1 | grep '^[A-Z]' || true
+  Traceback (most recent call last): (lfsremote-off !)
+  ValueError: no common changegroup version (lfsremote-off !)
+  $ grep 'lfs' .hg/requires $SERVER_REQUIRES
+  [1]
+
+  $ hg clone -q http://localhost:$HGPORT $TESTTMP/client2_clone
+  $ grep 'lfs' $TESTTMP/client2_clone/.hg/requires $SERVER_REQUIRES
+  [1]
+
+  $ hg init $TESTTMP/client2_pull
+  $ hg -R $TESTTMP/client2_pull pull -q http://localhost:$HGPORT
+  $ grep 'lfs' $TESTTMP/client2_pull/.hg/requires $SERVER_REQUIRES
+  [1]
+
+XXX: The difference here is the push failed above when the extension isn't
+enabled on the server.  The extension shouldn't need to mess with changegroup
+versions if there is no lfs content.  But the requirement needs to be
+consistently added before that can be ratcheted back.
+  $ hg identify http://localhost:$HGPORT
+  1477875038c6 (lfsremote-on !)
+  000000000000 (lfsremote-off !)
+
+--------------------------------------------------------------------------------
+Case #3: client with lfs content and the extension enabled; server with
+non-lfs content, and the extension state controlled by #testcases.
+
+TODO: add the 'lfs' requirement on the server for each test in lfsremote-on
+  $ echo 'this is a big lfs file' > lfs.bin
+  $ hg ci -Aqm 'lfs'
+  $ grep 'lfs' .hg/requires $SERVER_REQUIRES
+  .hg/requires:lfs
+
+TODO: fail more gracefully here
+  $ hg push -q 2>&1 | grep '^[A-Z]' || true
+  Traceback (most recent call last): (lfsremote-off !)
+  ValueError: no common changegroup version (lfsremote-off !)
+  $ grep 'lfs' .hg/requires $SERVER_REQUIRES
+  .hg/requires:lfs
+
+  $ hg clone -q http://localhost:$HGPORT $TESTTMP/client3_clone
+  $ grep 'lfs' $TESTTMP/client3_clone/.hg/requires $SERVER_REQUIRES
+  [1]
+
+  $ hg init $TESTTMP/client3_pull
+  $ hg -R $TESTTMP/client3_pull pull -q http://localhost:$HGPORT
+  $ grep 'lfs' $TESTTMP/client3_pull/.hg/requires $SERVER_REQUIRES
+  [1]
+
+XXX: The difference here is the push failed above when the extension isn't
+enabled on the server.  The extension shouldn't need to mess with changegroup
+versions if there is no lfs content.  But the requirement needs to be
+consistently added before that can be ratcheted back.
+  $ hg identify http://localhost:$HGPORT
+  8374dc4052cb (lfsremote-on !)
+  000000000000 (lfsremote-off !)
+
+Don't bother testing the lfsremote-off cases- the server won't be able
+to launch if there's lfs content and the extension is disabled.
+
+#if lfsremote-on
+
+--------------------------------------------------------------------------------
+Case #4: client with non-lfs content and the extension disabled; server with
+lfs content, and the extension enabled.
+
+  $ cat >> $HGRCPATH <<EOF
+  > [extensions]
+  > lfs = !
+  > EOF
+
+  $ hg init $TESTTMP/client4
+  $ cd $TESTTMP/client4
+  $ cat >> .hg/hgrc <<EOF
+  > [paths]
+  > default = http://localhost:$HGPORT
+  > EOF
+  $ echo 'non-lfs' > nonlfs2.txt
+  $ hg ci -Aqm 'non-lfs'
+  $ grep 'lfs' .hg/requires $SERVER_REQUIRES
+  [1]
+
+  $ hg push -q --force
+  warning: repository is unrelated
+  $ grep 'lfs' .hg/requires $SERVER_REQUIRES
+  [1]
+
+TODO: fail more gracefully.
+
+  $ hg clone -q http://localhost:$HGPORT $TESTTMP/client4_clone
+  abort: HTTP Error 500: Internal Server Error
+  [255]
+  $ grep 'lfs' $TESTTMP/client4_clone/.hg/requires $SERVER_REQUIRES
+  grep: $TESTTMP/client4_clone/.hg/requires: $ENOENT$
+  [2]
+
+TODO: fail more gracefully.
+
+  $ hg init $TESTTMP/client4_pull
+  $ hg -R $TESTTMP/client4_pull pull -q http://localhost:$HGPORT
+  abort: HTTP Error 500: Internal Server Error
+  [255]
+  $ grep 'lfs' $TESTTMP/client4_pull/.hg/requires $SERVER_REQUIRES
+  [1]
+
+  $ hg identify http://localhost:$HGPORT
+  03b080fa9d93
+
+--------------------------------------------------------------------------------
+Case #5: client with non-lfs content and the extension enabled; server with
+lfs content, and the extension enabled.
+
+  $ cat >> $HGRCPATH <<EOF
+  > [extensions]
+  > lfs =
+  > EOF
+  $ echo 'non-lfs' > nonlfs3.txt
+  $ hg ci -Aqm 'non-lfs file with lfs client'
+
+  $ hg push -q
+  $ grep 'lfs' .hg/requires $SERVER_REQUIRES
+  [1]
+
+  $ hg clone -q http://localhost:$HGPORT $TESTTMP/client5_clone
+  $ grep 'lfs' $TESTTMP/client5_clone/.hg/requires $SERVER_REQUIRES
+  [1]
+
+  $ hg init $TESTTMP/client5_pull
+  $ hg -R $TESTTMP/client5_pull pull -q http://localhost:$HGPORT
+  $ grep 'lfs' $TESTTMP/client5_pull/.hg/requires $SERVER_REQUIRES
+  [1]
+
+  $ hg identify http://localhost:$HGPORT
+  c729025cc5e3
+
+--------------------------------------------------------------------------------
+Case #6: client with lfs content and the extension enabled; server with
+lfs content, and the extension enabled.
+
+TODO: add the 'lfs' requirement on the server for each test
+
+  $ echo 'this is another lfs file' > lfs2.txt
+  $ hg ci -Aqm 'lfs file with lfs client'
+
+  $ hg push -q
+  $ grep 'lfs' .hg/requires $SERVER_REQUIRES
+  .hg/requires:lfs
+
+  $ hg clone -q http://localhost:$HGPORT $TESTTMP/client6_clone
+  $ grep 'lfs' $TESTTMP/client6_clone/.hg/requires $SERVER_REQUIRES
+  [1]
+
+  $ hg init $TESTTMP/client6_pull
+  $ hg -R $TESTTMP/client6_pull pull -q http://localhost:$HGPORT
+  $ grep 'lfs' $TESTTMP/client6_pull/.hg/requires $SERVER_REQUIRES
+  [1]
+
+  $ hg identify http://localhost:$HGPORT
+  d3b84d50eacb
+
+--------------------------------------------------------------------------------
+Misc: process dies early if a requirement exists and the extension is disabled
+
+  $ hg --config extensions.lfs=! summary
+  abort: repository requires features unknown to this Mercurial: lfs!
+  (see https://mercurial-scm.org/wiki/MissingRequirement for more information)
+  [255]
+
+#endif
+
+  $ $PYTHON $TESTDIR/killdaemons.py $DAEMON_PIDS
+
+#if lfsremote-on
+  $ cat $TESTTMP/errors.log | grep '^[A-Z]'
+  Traceback (most recent call last):
+  ValueError: no common changegroup version
+  Traceback (most recent call last):
+  ValueError: no common changegroup version
+  Traceback (most recent call last):
+  ValueError: no common changegroup version
+  Traceback (most recent call last):
+  ValueError: no common changegroup version
+#else
+  $ cat $TESTTMP/errors.log
+#endif