tests/test-bookmarks-corner-case.t
author Augie Fackler <augie@google.com>
Thu, 18 Jul 2019 14:19:41 -0400
changeset 42624 811e502d646d
parent 42552 904e0da2e195
child 42657 e0cf09bc35ef
child 42693 cfb774aae660
permissions -rw-r--r--
cleanup: remove redundant import For some reason the import checker only caught this on py3. Differential Revision: https://phab.mercurial-scm.org/D6657
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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================================
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Test corner case around bookmark
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================================
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This test file is meant to gather test around bookmark that are specific
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 enough to not find a place elsewhere.
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Test bookmark/changelog race condition
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======================================
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The data from the bookmark file are filtered to only contains bookmark with
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node known to the changelog. If the cache invalidation between these two bits
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goes wrong, bookmark can be dropped.
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global setup
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------------
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  $ cat >> $HGRCPATH << EOF
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  > [ui]
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  > ssh = "$PYTHON" "$TESTDIR/dummyssh"
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  > [server]
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  > concurrent-push-mode=check-related
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  > EOF
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Setup
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-----
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initial repository setup
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  $ hg init bookrace-server
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  $ cd bookrace-server
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  $ echo a > a
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  $ hg add a
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  $ hg commit -m root
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  $ echo a >> a
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  $ hg bookmark book-A
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  $ hg commit -m A0
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  $ hg up 'desc(root)'
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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  (leaving bookmark book-A)
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  $ echo b > b
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  $ hg add b
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  $ hg bookmark book-B
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  $ hg commit -m B0
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  created new head
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  $ hg up null
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  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
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  (leaving bookmark book-B)
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  $ hg phase --public --rev 'all()'
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  $ hg log -G
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  o  changeset:   2:c79985706978
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  |  bookmark:    book-B
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  |  tag:         tip
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  |  parent:      0:6569b5a81c7e
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  |  user:        test
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  |  date:        Thu Jan 01 00:00:00 1970 +0000
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  |  summary:     B0
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  |
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  | o  changeset:   1:39c28d785860
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  |/   bookmark:    book-A
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  |    user:        test
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  |    date:        Thu Jan 01 00:00:00 1970 +0000
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  |    summary:     A0
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  |
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  o  changeset:   0:6569b5a81c7e
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     user:        test
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     date:        Thu Jan 01 00:00:00 1970 +0000
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     summary:     root
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  $ hg book
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     book-A                    1:39c28d785860
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     book-B                    2:c79985706978
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  $ cd ..
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Add new changeset on each bookmark in distinct clones
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  $ hg clone ssh://user@dummy/bookrace-server client-A
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  requesting all changes
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  adding changesets
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  adding manifests
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  adding file changes
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  added 3 changesets with 3 changes to 2 files (+1 heads)
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  new changesets 6569b5a81c7e:c79985706978
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  updating to branch default
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  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  $ hg -R client-A update book-A
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  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
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  (activating bookmark book-A)
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  $ echo a >> client-A/a
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  $ hg -R client-A commit -m A1
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  $ hg clone ssh://user@dummy/bookrace-server client-B
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  requesting all changes
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  adding changesets
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  adding manifests
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  adding file changes
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  added 3 changesets with 3 changes to 2 files (+1 heads)
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  new changesets 6569b5a81c7e:c79985706978
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  updating to branch default
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  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  $ hg -R client-B update book-B
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  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  (activating bookmark book-B)
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  $ echo b >> client-B/b
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  $ hg -R client-B commit -m B1
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extension to reproduce the race
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-------------------------------
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If two process are pushing we want to make sure the following happens:
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* process A read changelog
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* process B to its full push
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* process A read bookmarks
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* process A proceed with rest of the push
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We build a server side extension for this purpose
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  $ cat > bookrace.py << EOF
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  > import atexit
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  > import os
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  > import time
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  > from mercurial import error, extensions, bookmarks
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  > 
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  > def wait(repo):
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  >     if not os.path.exists('push-A-started'):
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  >         assert repo._currentlock(repo._lockref) is None
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  >         assert repo._currentlock(repo._wlockref) is None
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  >         repo.ui.status(b'setting raced push up\n')
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  >         with open('push-A-started', 'w'):
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  >             pass
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  >     clock = 300
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  >     while not os.path.exists('push-B-done'):
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  >         clock -= 1
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  >         if clock <= 0:
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  >             raise error.Abort("race scenario timed out")
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  >         time.sleep(0.1)
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  > 
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  > def reposetup(ui, repo):
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  >     class racedrepo(repo.__class__):
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  >         @property
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  >         def _bookmarks(self):
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  >             wait(self)
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  >             return super(racedrepo, self)._bookmarks
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  >     repo.__class__ = racedrepo
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  > 
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  > def e():
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  >     with open('push-A-done', 'w'):
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  >         pass
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  > atexit.register(e)
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  > EOF
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Actual test
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-----------
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Start the raced push.
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  $ cat >> bookrace-server/.hg/hgrc << EOF
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  > [extensions]
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  > bookrace=$TESTTMP/bookrace.py
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  > EOF
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  $ hg push -R client-A -r book-A >push-output.txt 2>&1 &
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Wait up to 30 seconds for that push to start.
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  $ clock=30
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  $ while [ ! -f push-A-started ] && [ $clock -gt 0 ] ; do
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  >    clock=`expr $clock - 1`
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  >    sleep 1
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  > done
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Do the other push.
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  $ cat >> bookrace-server/.hg/hgrc << EOF
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  > [extensions]
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  > bookrace=!
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  > EOF
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  $ hg push -R client-B -r book-B
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  pushing to ssh://user@dummy/bookrace-server
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  searching for changes
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  remote: adding changesets
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  remote: adding manifests
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  remote: adding file changes
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  remote: added 1 changesets with 1 changes to 1 files
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  updating bookmark book-B
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Signal the raced put that we are done (it waits up to 30 seconds).
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  $ touch push-B-done
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Wait for the raced push to finish (with the remaning of the initial 30 seconds).
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  $ while [ ! -f push-A-done ] && [ $clock -gt 0 ] ; do
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  >    clock=`expr $clock - 1`
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  >    sleep 1
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  > done
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Check raced push output.
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  $ cat push-output.txt
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  pushing to ssh://user@dummy/bookrace-server
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  searching for changes
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  remote: setting raced push up
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  remote: adding changesets
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  remote: adding manifests
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  remote: adding file changes
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  remote: added 1 changesets with 1 changes to 1 files
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  updating bookmark book-A
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Check result of the push.
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  $ hg -R bookrace-server log -G
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  o  changeset:   4:9ce3b28c16de
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  |  bookmark:    book-A
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  |  tag:         tip
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  |  parent:      1:39c28d785860
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  |  user:        test
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  |  date:        Thu Jan 01 00:00:00 1970 +0000
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  |  summary:     A1
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  |
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  | o  changeset:   3:f26c3b5167d1
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  | |  bookmark:    book-B (false !)
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  | |  user:        test
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  | |  date:        Thu Jan 01 00:00:00 1970 +0000
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  | |  summary:     B1
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  | |
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  | o  changeset:   2:c79985706978
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  | |  parent:      0:6569b5a81c7e
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  | |  user:        test
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  | |  date:        Thu Jan 01 00:00:00 1970 +0000
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  | |  summary:     B0
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  | |
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  o |  changeset:   1:39c28d785860
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parents:
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  |/   user:        test
d2c871b78c36 bookmark: add a test for a race condition on push
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  |    date:        Thu Jan 01 00:00:00 1970 +0000
d2c871b78c36 bookmark: add a test for a race condition on push
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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   236
  |    summary:     A0
d2c871b78c36 bookmark: add a test for a race condition on push
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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  |
d2c871b78c36 bookmark: add a test for a race condition on push
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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   238
  o  changeset:   0:6569b5a81c7e
d2c871b78c36 bookmark: add a test for a race condition on push
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parents:
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     user:        test
d2c871b78c36 bookmark: add a test for a race condition on push
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parents:
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   240
     date:        Thu Jan 01 00:00:00 1970 +0000
d2c871b78c36 bookmark: add a test for a race condition on push
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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   241
     summary:     root
d2c871b78c36 bookmark: add a test for a race condition on push
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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d2c871b78c36 bookmark: add a test for a race condition on push
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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   243
  $ hg -R bookrace-server book
d2c871b78c36 bookmark: add a test for a race condition on push
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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     book-A                    4:9ce3b28c16de
42185
2c27b7fadcd3 bookmarks: backout the attempt to fix the delete race
Matt Harbison <matt_harbison@yahoo.com>
parents: 42183
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   245
     book-B                    3:f26c3b5167d1 (false !)