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# Copyright (C) 2007 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Helper classes for repository implementation tests."""
from bzrlib import (
inventory,
revision as _mod_revision,
)
from bzrlib.repofmt.knitrepo import RepositoryFormatKnit
from bzrlib.tests.repository_implementations import TestCaseWithRepository
from bzrlib.tests import TestNotApplicable
class TestCaseWithBrokenRevisionIndex(TestCaseWithRepository):
def make_repo_with_extra_ghost_index(self):
"""Make a corrupt repository.
It will contain one revision, 'revision-id'. The knit index will claim
that it has one parent, 'incorrect-parent', but the revision text will
claim it has no parents.
Note: only the *cache* of the knit index is corrupted. Thus the
corruption will only last while the repository is locked. For this
reason, the returned repo is locked.
"""
if not isinstance(self.repository_format, RepositoryFormatKnit):
# XXX: Broken revision graphs can happen to weaves too, but they're
# pretty deprecated. Ideally these tests should apply to any repo
# where repo.revision_graph_can_have_wrong_parents() is True, but
# at the moment we only know how to corrupt knit repos.
raise TestNotApplicable(
"%s isn't a knit format" % self.repository_format)
repo = self.make_repository('broken')
repo.lock_write()
repo.start_write_group()
try:
inv = inventory.Inventory(revision_id='revision-id')
inv.root.revision = 'revision-id'
repo.add_inventory('revision-id', inv, [])
revision = _mod_revision.Revision('revision-id',
committer='jrandom@example.com', timestamp=0,
inventory_sha1='', timezone=0, message='message', parent_ids=[])
repo.add_revision('revision-id',revision, inv)
except:
repo.abort_write_group()
repo.unlock()
raise
else:
repo.commit_write_group()
repo.unlock()
# Change the knit index's record of the parents for 'revision-id' to
# claim it has a parent, 'incorrect-parent', that doesn't exist in this
# knit at all.
repo.lock_write()
self.addCleanup(repo.unlock)
rev_knit = repo._get_revision_vf()
index_cache = rev_knit._index._cache
cached_index_entry = list(index_cache['revision-id'])
cached_index_entry[4] = ['incorrect-parent']
index_cache['revision-id'] = tuple(cached_index_entry)
return repo
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