/brz/remove-bazaar : contents of bzrlib/tests/bzrdir_implementations/test

: (revision 1702)

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http://gegoxaren.bato24.eu/bzr/brz/remove-bazaar

# (C) 2005, 2006 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

"""Tests for bzrdir implementations - tests a bzrdir format."""

from cStringIO import StringIO
import os
from stat import *
import sys

import bzrlib.branch
import bzrlib.bzrdir as bzrdir
from bzrlib.branch import Branch, needs_read_lock, needs_write_lock
from bzrlib.check import check
from bzrlib.commit import commit
import bzrlib.errors as errors
from bzrlib.errors import (FileExists,
                           NoSuchRevision,
                           NoSuchFile,
                           UninitializableFormat,
                           NotBranchError,
                           )
import bzrlib.repository as repository
from bzrlib.tests import (
                          ChrootedTestCase,
                          TestCase,
                          TestCaseWithTransport,
                          TestSkipped,
                          )
from bzrlib.trace import mutter
import bzrlib.transactions as transactions
import bzrlib.transport as transport
from bzrlib.transport import get_transport
import bzrlib.ui as ui
from bzrlib.upgrade import upgrade
import bzrlib.workingtree as workingtree


class TestCaseWithBzrDir(TestCaseWithTransport):

    def setUp(self):
        super(TestCaseWithBzrDir, self).setUp()
        self.bzrdir = None

    def get_bzrdir(self):
        if self.bzrdir is None:
            self.bzrdir = self.make_bzrdir(None)
        return self.bzrdir

    def make_bzrdir(self, relpath, format=None):
        return super(TestCaseWithBzrDir, self).make_bzrdir(
            relpath, format=self.bzrdir_format)



class TestBzrDir(TestCaseWithBzrDir):
    # Many of these tests test for disk equality rather than checking
    # for semantic equivalence. This works well for some tests but
    # is not good at handling changes in representation or the addition
    # or removal of control data. It would be nice to for instance:
    # sprout a new branch, check that the nickname has been reset by hand
    # and then set the nickname to match the source branch, at which point
    # a semantic equivalence should pass

    def assertDirectoriesEqual(self, source, target, ignore_list=[]):
        """Assert that the content of source and target are identical.

        paths in ignore list will be completely ignored.
        
        We ignore paths that represent data which is allowed to change during
        a clone or sprout: for instance, inventory.knit contains gzip fragements
        which have timestamps in them, and as we have read the inventory from 
        the source knit, the already-read data is recompressed rather than
        reading it again, which leads to changed timestamps. This is ok though,
        because the inventory.kndx file is not ignored, and the integrity of
        knit joins is tested by test_knit and test_versionedfile.
        """
        files = []
        directories = ['.']
        while directories:
            dir = directories.pop()
            for path in source.list_dir(dir):
                path = dir + '/' + path
                if path in ignore_list:
                    continue
                stat = source.stat(path)
                if S_ISDIR(stat.st_mode):
                    self.assertTrue(S_ISDIR(target.stat(path).st_mode))
                    directories.append(path)
                else:
                    self.assertEqualDiff(source.get(path).read(),
                                         target.get(path).read(),
                                         "text for file %r differs:\n" % path)

    def test_clone_bzrdir_empty(self):
        dir = self.make_bzrdir('source')
        target = dir.clone(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport)
    
    def test_clone_bzrdir_empty_force_new_ignored(self):
        # the force_new_repo parameter should have no effect on an empty
        # bzrdir's clone logic
        dir = self.make_bzrdir('source')
        target = dir.clone(self.get_url('target'), force_new_repo=True)
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport)
    
    def test_clone_bzrdir_repository(self):
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        dir = self.make_bzrdir('source')
        repo = dir.create_repository()
        repo.fetch(tree.branch.repository)
        self.assertTrue(repo.has_revision('1'))
        target = dir.clone(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/repository/inventory.knit',
                                     ])


    def test_clone_bzrdir_repository_under_shared(self):
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        dir = self.make_bzrdir('source')
        repo = dir.create_repository()
        repo.fetch(tree.branch.repository)
        self.assertTrue(repo.has_revision('1'))
        try:
            self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        target = dir.clone(self.get_url('target/child'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertRaises(errors.NoRepositoryPresent, target.open_repository)

    def test_clone_bzrdir_repository_branch_both_under_shared(self):
        try:
            shared_repo = self.make_repository('shared', shared=True)
        except errors.IncompatibleFormat:
            return
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        tree.bzrdir.open_branch().set_revision_history([])
        tree.set_last_revision(None)
        tree.commit('revision 2', rev_id='2')
        tree.bzrdir.open_repository().copy_content_into(shared_repo)
        dir = self.make_bzrdir('shared/source')
        dir.create_branch()
        target = dir.clone(self.get_url('shared/target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertNotEqual(dir.transport.base, shared_repo.bzrdir.transport.base)
        self.assertTrue(shared_repo.has_revision('1'))
        
    def test_clone_bzrdir_repository_under_shared_force_new_repo(self):
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        dir = self.make_bzrdir('source')
        repo = dir.create_repository()
        repo.fetch(tree.branch.repository)
        self.assertTrue(repo.has_revision('1'))
        try:
            self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        target = dir.clone(self.get_url('target/child'), force_new_repo=True)
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/repository/inventory.knit',
                                     ])

    def test_clone_bzrdir_repository_revision(self):
        # test for revision limiting, [smoke test, not corner case checks].
        # make a repository with some revisions,
        # and clone it with a revision limit.
        # 
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        tree.bzrdir.open_branch().set_revision_history([])
        tree.set_last_revision(None)
        tree.commit('revision 2', rev_id='2')
        source = self.make_repository('source')
        tree.bzrdir.open_repository().copy_content_into(source)
        dir = source.bzrdir
        target = dir.clone(self.get_url('target'), revision_id='2')
        raise TestSkipped('revision limiting not strict yet')

    def test_clone_bzrdir_branch_and_repo(self):
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1')
        source = self.make_branch('source')
        tree.bzrdir.open_repository().copy_content_into(source.repository)
        tree.bzrdir.open_branch().copy_content_into(source)
        dir = source.bzrdir
        target = dir.clone(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/stat-cache',
                                     './.bzr/checkout/stat-cache',
                                     './.bzr/repository/inventory.knit',
                                     ])

    def test_clone_bzrdir_branch_and_repo_into_shared_repo(self):
        # by default cloning into a shared repo uses the shared repo.
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1')
        source = self.make_branch('source')
        tree.bzrdir.open_repository().copy_content_into(source.repository)
        tree.bzrdir.open_branch().copy_content_into(source)
        try:
            self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        dir = source.bzrdir
        target = dir.clone(self.get_url('target/child'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertRaises(errors.NoRepositoryPresent, target.open_repository)
        self.assertEqual(source.revision_history(),
                         target.open_branch().revision_history())

    def test_clone_bzrdir_branch_and_repo_into_shared_repo_force_new_repo(self):
        # by default cloning into a shared repo uses the shared repo.
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1')
        source = self.make_branch('source')
        tree.bzrdir.open_repository().copy_content_into(source.repository)
        tree.bzrdir.open_branch().copy_content_into(source)
        try:
            self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        dir = source.bzrdir
        target = dir.clone(self.get_url('target/child'), force_new_repo=True)
        self.assertNotEqual(dir.transport.base, target.transport.base)
        target.open_repository()
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/repository/inventory.knit',
                                     ])

    def test_clone_bzrdir_branch_reference(self):
        # cloning should preserve the reference status of the branch in a bzrdir
        referenced_branch = self.make_branch('referencced')
        dir = self.make_bzrdir('source')
        try:
            reference = bzrlib.branch.BranchReferenceFormat().initialize(dir,
                referenced_branch)
        except errors.IncompatibleFormat:
            # this is ok too, not all formats have to support references.
            return
        target = dir.clone(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/repository/inventory.knit',
                                     ])

    def test_clone_bzrdir_branch_revision(self):
        # test for revision limiting, [smoke test, not corner case checks].
        # make a branch with some revisions,
        # and clone it with a revision limit.
        # 
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        tree.commit('revision 2', rev_id='2', allow_pointless=True)
        source = self.make_branch('source')
        tree.bzrdir.open_repository().copy_content_into(source.repository)
        tree.bzrdir.open_branch().copy_content_into(source)
        dir = source.bzrdir
        target = dir.clone(self.get_url('target'), revision_id='1')
        self.assertEqual('1', target.open_branch().last_revision())
        
    def test_clone_bzrdir_tree_branch_repo(self):
        tree = self.make_branch_and_tree('sourcce')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1')
        dir = tree.bzrdir
        target = dir.clone(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/stat-cache',
                                     './.bzr/checkout/stat-cache',
                                     './.bzr/repository/inventory.knit',
                                     ])

        target.open_workingtree().revert([])

    def test_revert_inventory(self):
        tree = self.make_branch_and_tree('sourcce')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1')
        dir = tree.bzrdir
        target = dir.clone(self.get_url('target'))
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/stat-cache',
                                     './.bzr/checkout/stat-cache',
                                     './.bzr/repository/inventory.knit',
                                     ])

        target.open_workingtree().revert([])
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/stat-cache',
                                     './.bzr/checkout/stat-cache',
                                     './.bzr/repository/inventory.knit',
                                     ])


    def test_clone_bzrdir_tree_branch_reference(self):
        # a tree with a branch reference (aka a checkout) 
        # should stay a checkout on clone.
        referenced_branch = self.make_branch('referencced')
        dir = self.make_bzrdir('source')
        try:
            reference = bzrlib.branch.BranchReferenceFormat().initialize(dir,
                referenced_branch)
        except errors.IncompatibleFormat:
            # this is ok too, not all formats have to support references.
            return
        dir.create_workingtree()
        target = dir.clone(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/stat-cache',
                                     './.bzr/checkout/stat-cache',
                                     './.bzr/repository/inventory.knit',
                                     ])


    def test_clone_bzrdir_tree_revision(self):
        # test for revision limiting, [smoke test, not corner case checks].
        # make a tree with a revision with a last-revision
        # and clone it with a revision limit.
        # This smoke test just checks the revision-id is right. Tree specific
        # tests will check corner cases.
        tree = self.make_branch_and_tree('source')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        tree.commit('revision 2', rev_id='2', allow_pointless=True)
        dir = tree.bzrdir
        target = dir.clone(self.get_url('target'), revision_id='1')
        self.assertEqual('1', target.open_workingtree().last_revision())

    def test_clone_bzrdir_incomplete_source_with_basis(self):
        # ensure that basis really does grab from the basis by having incomplete source
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        source = self.make_branch_and_tree('source')
        # this gives us an incomplete repository
        tree.bzrdir.open_repository().copy_content_into(source.branch.repository)
        tree.commit('revision 2', rev_id='2', allow_pointless=True)
        tree.bzrdir.open_branch().copy_content_into(source.branch)
        tree.copy_content_into(source)
        self.assertFalse(source.branch.repository.has_revision('2'))
        dir = source.bzrdir
        target = dir.clone(self.get_url('target'), basis=tree.bzrdir)
        self.assertEqual('2', target.open_branch().last_revision())
        self.assertEqual('2', target.open_workingtree().last_revision())
        self.assertTrue(target.open_branch().repository.has_revision('2'))

    def test_sprout_bzrdir_empty(self):
        dir = self.make_bzrdir('source')
        target = dir.sprout(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        # creates a new repository branch and tree
        target.open_repository()
        target.open_branch()
        target.open_workingtree()

    def test_sprout_bzrdir_empty_under_shared_repo(self):
        # sprouting an empty dir into a repo uses the repo
        dir = self.make_bzrdir('source')
        try:
            self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        target = dir.sprout(self.get_url('target/child'))
        self.assertRaises(errors.NoRepositoryPresent, target.open_repository)
        target.open_branch()
        target.open_workingtree()

    def test_sprout_bzrdir_empty_under_shared_repo(self):
        # the force_new_repo parameter should force use of a new repo in an empty
        # bzrdir's sprout logic
        dir = self.make_bzrdir('source')
        try:
            self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        target = dir.sprout(self.get_url('target/child'), force_new_repo=True)
        target.open_repository()
        target.open_branch()
        target.open_workingtree()
    
    def test_sprout_bzrdir_repository(self):
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        dir = self.make_bzrdir('source')
        repo = dir.create_repository()
        repo.fetch(tree.branch.repository)
        self.assertTrue(repo.has_revision('1'))
        target = dir.sprout(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/repository/inventory.knit',
                                     ])

    def test_sprout_bzrdir_with_repository_to_shared(self):
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        tree.bzrdir.open_branch().set_revision_history([])
        tree.set_last_revision(None)
        tree.commit('revision 2', rev_id='2')
        source = self.make_repository('source')
        tree.bzrdir.open_repository().copy_content_into(source)
        dir = source.bzrdir
        try:
            shared_repo = self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        target = dir.sprout(self.get_url('target/child'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertTrue(shared_repo.has_revision('1'))

    def test_sprout_bzrdir_repository_branch_both_under_shared(self):
        try:
            shared_repo = self.make_repository('shared', shared=True)
        except errors.IncompatibleFormat:
            return
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        tree.bzrdir.open_branch().set_revision_history([])
        tree.set_last_revision(None)
        tree.commit('revision 2', rev_id='2')
        tree.bzrdir.open_repository().copy_content_into(shared_repo)
        dir = self.make_bzrdir('shared/source')
        dir.create_branch()
        target = dir.sprout(self.get_url('shared/target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertNotEqual(dir.transport.base, shared_repo.bzrdir.transport.base)
        self.assertTrue(shared_repo.has_revision('1'))

    def test_sprout_bzrdir_repository_under_shared_force_new_repo(self):
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        tree.bzrdir.open_branch().set_revision_history([])
        tree.set_last_revision(None)
        tree.commit('revision 2', rev_id='2')
        source = self.make_repository('source')
        tree.bzrdir.open_repository().copy_content_into(source)
        dir = source.bzrdir
        try:
            shared_repo = self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        target = dir.sprout(self.get_url('target/child'), force_new_repo=True)
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertFalse(shared_repo.has_revision('1'))

    def test_sprout_bzrdir_repository_revision(self):
        # test for revision limiting, [smoke test, not corner case checks].
        # make a repository with some revisions,
        # and sprout it with a revision limit.
        # 
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        tree.bzrdir.open_branch().set_revision_history([])
        tree.set_last_revision(None)
        tree.commit('revision 2', rev_id='2')
        source = self.make_repository('source')
        tree.bzrdir.open_repository().copy_content_into(source)
        dir = source.bzrdir
        target = dir.sprout(self.get_url('target'), revision_id='2')
        raise TestSkipped('revision limiting not strict yet')

    def test_sprout_bzrdir_branch_and_repo(self):
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1')
        source = self.make_branch('source')
        tree.bzrdir.open_repository().copy_content_into(source.repository)
        tree.bzrdir.open_branch().copy_content_into(source)
        dir = source.bzrdir
        target = dir.sprout(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/stat-cache',
                                     './.bzr/checkout/stat-cache',
                                     './.bzr/inventory',
                                     './.bzr/checkout/inventory',
                                     './.bzr/repository/inventory.knit',
                                     ])

    def test_sprout_bzrdir_branch_and_repo_shared(self):
        # sprouting a branch with a repo into a shared repo uses the shared
        # repo
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        source = self.make_branch('source')
        tree.bzrdir.open_repository().copy_content_into(source.repository)
        tree.bzrdir.open_branch().copy_content_into(source)
        dir = source.bzrdir
        try:
            shared_repo = self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        target = dir.sprout(self.get_url('target/child'))
        self.assertTrue(shared_repo.has_revision('1'))

    def test_sprout_bzrdir_branch_and_repo_shared_force_new_repo(self):
        # sprouting a branch with a repo into a shared repo uses the shared
        # repo
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        source = self.make_branch('source')
        tree.bzrdir.open_repository().copy_content_into(source.repository)
        tree.bzrdir.open_branch().copy_content_into(source)
        dir = source.bzrdir
        try:
            shared_repo = self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        target = dir.sprout(self.get_url('target/child'), force_new_repo=True)
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertFalse(shared_repo.has_revision('1'))

    def test_sprout_bzrdir_branch_reference(self):
        # sprouting should create a repository if needed and a sprouted branch.
        referenced_branch = self.make_branch('referencced')
        dir = self.make_bzrdir('source')
        try:
            reference = bzrlib.branch.BranchReferenceFormat().initialize(dir,
                referenced_branch)
        except errors.IncompatibleFormat:
            # this is ok too, not all formats have to support references.
            return
        self.assertRaises(errors.NoRepositoryPresent, dir.open_repository)
        target = dir.sprout(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        # we want target to have a branch that is in-place.
        self.assertEqual(target, target.open_branch().bzrdir)
        # and as we dont support repositories being detached yet, a repo in 
        # place
        target.open_repository()

    def test_sprout_bzrdir_branch_reference_shared(self):
        # sprouting should create a repository if needed and a sprouted branch.
        referenced_tree = self.make_branch_and_tree('referenced')
        referenced_tree.commit('1', rev_id='1', allow_pointless=True)
        dir = self.make_bzrdir('source')
        try:
            reference = bzrlib.branch.BranchReferenceFormat().initialize(dir,
                referenced_tree.branch)
        except errors.IncompatibleFormat:
            # this is ok too, not all formats have to support references.
            return
        self.assertRaises(errors.NoRepositoryPresent, dir.open_repository)
        try:
            shared_repo = self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        target = dir.sprout(self.get_url('target/child'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        # we want target to have a branch that is in-place.
        self.assertEqual(target, target.open_branch().bzrdir)
        # and we want no repository as the target is shared
        self.assertRaises(errors.NoRepositoryPresent, 
                          target.open_repository)
        # and we want revision '1' in the shared repo
        self.assertTrue(shared_repo.has_revision('1'))

    def test_sprout_bzrdir_branch_reference_shared_force_new_repo(self):
        # sprouting should create a repository if needed and a sprouted branch.
        referenced_tree = self.make_branch_and_tree('referenced')
        referenced_tree.commit('1', rev_id='1', allow_pointless=True)
        dir = self.make_bzrdir('source')
        try:
            reference = bzrlib.branch.BranchReferenceFormat().initialize(dir,
                referenced_tree.branch)
        except errors.IncompatibleFormat:
            # this is ok too, not all formats have to support references.
            return
        self.assertRaises(errors.NoRepositoryPresent, dir.open_repository)
        try:
            shared_repo = self.make_repository('target', shared=True)
        except errors.IncompatibleFormat:
            return
        target = dir.sprout(self.get_url('target/child'), force_new_repo=True)
        self.assertNotEqual(dir.transport.base, target.transport.base)
        # we want target to have a branch that is in-place.
        self.assertEqual(target, target.open_branch().bzrdir)
        # and we want revision '1' in the new repo
        self.assertTrue(target.open_repository().has_revision('1'))
        # but not the shared one
        self.assertFalse(shared_repo.has_revision('1'))

    def test_sprout_bzrdir_branch_revision(self):
        # test for revision limiting, [smoke test, not corner case checks].
        # make a repository with some revisions,
        # and sprout it with a revision limit.
        # 
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        tree.commit('revision 2', rev_id='2', allow_pointless=True)
        source = self.make_branch('source')
        tree.bzrdir.open_repository().copy_content_into(source.repository)
        tree.bzrdir.open_branch().copy_content_into(source)
        dir = source.bzrdir
        target = dir.sprout(self.get_url('target'), revision_id='1')
        self.assertEqual('1', target.open_branch().last_revision())
        
    def test_sprout_bzrdir_tree_branch_repo(self):
        tree = self.make_branch_and_tree('sourcce')
        self.build_tree(['foo'], transport=tree.bzrdir.transport.clone('..'))
        tree.add('foo')
        tree.commit('revision 1')
        dir = tree.bzrdir
        target = dir.sprout(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        self.assertDirectoriesEqual(dir.root_transport, target.root_transport,
                                    ['./.bzr/stat-cache',
                                     './.bzr/checkout/stat-cache',
                                     './.bzr/inventory',
                                     './.bzr/checkout/inventory',
                                     './.bzr/repository/inventory.knit',
                                     ])

    def test_sprout_bzrdir_tree_branch_reference(self):
        # sprouting should create a repository if needed and a sprouted branch.
        # the tree state should not be copied.
        referenced_branch = self.make_branch('referencced')
        dir = self.make_bzrdir('source')
        try:
            reference = bzrlib.branch.BranchReferenceFormat().initialize(dir,
                referenced_branch)
        except errors.IncompatibleFormat:
            # this is ok too, not all formats have to support references.
            return
        self.assertRaises(errors.NoRepositoryPresent, dir.open_repository)
        tree = dir.create_workingtree()
        tree.bzrdir.root_transport.mkdir('subdir')
        tree.add('subdir')
        target = dir.sprout(self.get_url('target'))
        self.assertNotEqual(dir.transport.base, target.transport.base)
        # we want target to have a branch that is in-place.
        self.assertEqual(target, target.open_branch().bzrdir)
        # and as we dont support repositories being detached yet, a repo in 
        # place
        target.open_repository()
        result_tree = target.open_workingtree()
        self.assertFalse(result_tree.has_filename('subdir'))

    def test_sprout_bzrdir_tree_branch_reference_revision(self):
        # sprouting should create a repository if needed and a sprouted branch.
        # the tree state should not be copied but the revision changed,
        # and the likewise the new branch should be truncated too
        referenced_branch = self.make_branch('referencced')
        dir = self.make_bzrdir('source')
        try:
            reference = bzrlib.branch.BranchReferenceFormat().initialize(dir,
                referenced_branch)
        except errors.IncompatibleFormat:
            # this is ok too, not all formats have to support references.
            return
        self.assertRaises(errors.NoRepositoryPresent, dir.open_repository)
        tree = dir.create_workingtree()
        self.build_tree(['foo'], transport=dir.root_transport)
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        tree.commit('revision 2', rev_id='2', allow_pointless=True)
        target = dir.sprout(self.get_url('target'), revision_id='1')
        self.assertNotEqual(dir.transport.base, target.transport.base)
        # we want target to have a branch that is in-place.
        self.assertEqual(target, target.open_branch().bzrdir)
        # and as we dont support repositories being detached yet, a repo in 
        # place
        target.open_repository()
        # we trust that the working tree sprouting works via the other tests.
        self.assertEqual('1', target.open_workingtree().last_revision())
        self.assertEqual('1', target.open_branch().last_revision())

    def test_sprout_bzrdir_tree_revision(self):
        # test for revision limiting, [smoke test, not corner case checks].
        # make a tree with a revision with a last-revision
        # and sprout it with a revision limit.
        # This smoke test just checks the revision-id is right. Tree specific
        # tests will check corner cases.
        tree = self.make_branch_and_tree('source')
        self.build_tree(['foo'], transport=tree.bzrdir.root_transport)
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        tree.commit('revision 2', rev_id='2', allow_pointless=True)
        dir = tree.bzrdir
        target = dir.sprout(self.get_url('target'), revision_id='1')
        self.assertEqual('1', target.open_workingtree().last_revision())

    def test_sprout_bzrdir_incomplete_source_with_basis(self):
        # ensure that basis really does grab from the basis by having incomplete source
        tree = self.make_branch_and_tree('commit_tree')
        self.build_tree(['foo'], transport=tree.bzrdir.root_transport)
        tree.add('foo')
        tree.commit('revision 1', rev_id='1')
        source = self.make_branch_and_tree('source')
        # this gives us an incomplete repository
        tree.bzrdir.open_repository().copy_content_into(source.branch.repository)
        tree.commit('revision 2', rev_id='2', allow_pointless=True)
        tree.bzrdir.open_branch().copy_content_into(source.branch)
        tree.copy_content_into(source)
        self.assertFalse(source.branch.repository.has_revision('2'))
        dir = source.bzrdir
        target = dir.sprout(self.get_url('target'), basis=tree.bzrdir)
        self.assertEqual('2', target.open_branch().last_revision())
        self.assertEqual('2', target.open_workingtree().last_revision())
        self.assertTrue(target.open_branch().repository.has_revision('2'))

    def test_format_initialize_find_open(self):
        # loopback test to check the current format initializes to itself.
        if not self.bzrdir_format.is_supported():
            # unsupported formats are not loopback testable
            # because the default open will not open them and
            # they may not be initializable.
            return
        # supported formats must be able to init and open
        t = get_transport(self.get_url())
        readonly_t = get_transport(self.get_readonly_url())
        made_control = self.bzrdir_format.initialize(t.base)
        self.failUnless(isinstance(made_control, bzrdir.BzrDir))
        self.assertEqual(self.bzrdir_format,
                         bzrdir.BzrDirFormat.find_format(readonly_t))
        direct_opened_dir = self.bzrdir_format.open(readonly_t)
        opened_dir = bzrdir.BzrDir.open(t.base)
        self.assertEqual(made_control._format,
                         opened_dir._format)
        self.assertEqual(direct_opened_dir._format,
                         opened_dir._format)
        self.failUnless(isinstance(opened_dir, bzrdir.BzrDir))

    def test_open_not_bzrdir(self):
        # test the formats specific behaviour for no-content or similar dirs.
        self.assertRaises(NotBranchError,
                          self.bzrdir_format.open,
                          get_transport(self.get_readonly_url()))

    def test_create_branch(self):
        # a bzrdir can construct a branch and repository for itself.
        if not self.bzrdir_format.is_supported():
            # unsupported formats are not loopback testable
            # because the default open will not open them and
            # they may not be initializable.
            return
        t = get_transport(self.get_url())
        made_control = self.bzrdir_format.initialize(t.base)
        made_repo = made_control.create_repository()
        made_branch = made_control.create_branch()
        self.failUnless(isinstance(made_branch, bzrlib.branch.Branch))
        self.assertEqual(made_control, made_branch.bzrdir)
        
    def test_open_branch(self):
        if not self.bzrdir_format.is_supported():
            # unsupported formats are not loopback testable
            # because the default open will not open them and
            # they may not be initializable.
            return
        t = get_transport(self.get_url())
        made_control = self.bzrdir_format.initialize(t.base)
        made_repo = made_control.create_repository()
        made_branch = made_control.create_branch()
        opened_branch = made_control.open_branch()
        self.assertEqual(made_control, opened_branch.bzrdir)
        self.failUnless(isinstance(opened_branch, made_branch.__class__))
        self.failUnless(isinstance(opened_branch._format, made_branch._format.__class__))

    def test_create_repository(self):
        # a bzrdir can construct a repository for itself.
        if not self.bzrdir_format.is_supported():
            # unsupported formats are not loopback testable
            # because the default open will not open them and
            # they may not be initializable.
            return
        t = get_transport(self.get_url())
        made_control = self.bzrdir_format.initialize(t.base)
        made_repo = made_control.create_repository()
        self.failUnless(isinstance(made_repo, repository.Repository))
        self.assertEqual(made_control, made_repo.bzrdir)
        
    def test_open_repository(self):
        if not self.bzrdir_format.is_supported():
            # unsupported formats are not loopback testable
            # because the default open will not open them and
            # they may not be initializable.
            return
        t = get_transport(self.get_url())
        made_control = self.bzrdir_format.initialize(t.base)
        made_repo = made_control.create_repository()
        opened_repo = made_control.open_repository()
        self.assertEqual(made_control, opened_repo.bzrdir)
        self.failUnless(isinstance(opened_repo, made_repo.__class__))
        self.failUnless(isinstance(opened_repo._format, made_repo._format.__class__))

    def test_create_workingtree(self):
        # a bzrdir can construct a working tree for itself.
        if not self.bzrdir_format.is_supported():
            # unsupported formats are not loopback testable
            # because the default open will not open them and
            # they may not be initializable.
            return
        # this has to be tested with local access as we still support creating 
        # format 6 bzrdirs
        t = get_transport('.')
        made_control = self.bzrdir_format.initialize(t.base)
        made_repo = made_control.create_repository()
        made_branch = made_control.create_branch()
        made_tree = made_control.create_workingtree()
        self.failUnless(isinstance(made_tree, workingtree.WorkingTree))
        self.assertEqual(made_control, made_tree.bzrdir)
        
    def test_create_workingtree_revision(self):
        # a bzrdir can construct a working tree for itself @ a specific revision.
        source = self.make_branch_and_tree('source')
        source.commit('a', rev_id='a', allow_pointless=True)
        source.commit('b', rev_id='b', allow_pointless=True)
        self.build_tree(['new/'])
        made_control = self.bzrdir_format.initialize('new')
        source.branch.repository.clone(made_control)
        source.branch.clone(made_control)
        made_tree = made_control.create_workingtree(revision_id='a')
        self.assertEqual('a', made_tree.last_revision())
        
    def test_open_workingtree(self):
        if not self.bzrdir_format.is_supported():
            # unsupported formats are not loopback testable
            # because the default open will not open them and
            # they may not be initializable.
            return
        # this has to be tested with local access as we still support creating 
        # format 6 bzrdirs
        t = get_transport('.')
        made_control = self.bzrdir_format.initialize(t.base)
        made_repo = made_control.create_repository()
        made_branch = made_control.create_branch()
        made_tree = made_control.create_workingtree()
        opened_tree = made_control.open_workingtree()
        self.assertEqual(made_control, opened_tree.bzrdir)
        self.failUnless(isinstance(opened_tree, made_tree.__class__))
        self.failUnless(isinstance(opened_tree._format, made_tree._format.__class__))

    def test_get_branch_transport(self):
        dir = self.make_bzrdir('.')
        # without a format, get_branch_transport gives use a transport
        # which -may- point to an existing dir.
        self.assertTrue(isinstance(dir.get_branch_transport(None),
                                   transport.Transport))
        # with a given format, either the bzr dir supports identifiable
        # branches, or it supports anonymous  branch formats, but not both.
        anonymous_format = bzrlib.branch.BzrBranchFormat4()
        identifiable_format = bzrlib.branch.BzrBranchFormat5()
        try:
            found_transport = dir.get_branch_transport(anonymous_format)
            self.assertRaises(errors.IncompatibleFormat,
                              dir.get_branch_transport,
                              identifiable_format)
        except errors.IncompatibleFormat:
            found_transport = dir.get_branch_transport(identifiable_format)
        self.assertTrue(isinstance(found_transport, transport.Transport))
        # and the dir which has been initialized for us must be statable.
        found_transport.stat('.')

    def test_get_repository_transport(self):
        dir = self.make_bzrdir('.')
        # without a format, get_repository_transport gives use a transport
        # which -may- point to an existing dir.
        self.assertTrue(isinstance(dir.get_repository_transport(None),
                                   transport.Transport))
        # with a given format, either the bzr dir supports identifiable
        # repositoryes, or it supports anonymous  repository formats, but not both.
        anonymous_format = repository.RepositoryFormat6()
        identifiable_format = repository.RepositoryFormat7()
        try:
            found_transport = dir.get_repository_transport(anonymous_format)
            self.assertRaises(errors.IncompatibleFormat,
                              dir.get_repository_transport,
                              identifiable_format)
        except errors.IncompatibleFormat:
            found_transport = dir.get_repository_transport(identifiable_format)
        self.assertTrue(isinstance(found_transport, transport.Transport))
        # and the dir which has been initialized for us must be statable.
        found_transport.stat('.')

    def test_get_workingtree_transport(self):
        dir = self.make_bzrdir('.')
        # without a format, get_workingtree_transport gives use a transport
        # which -may- point to an existing dir.
        self.assertTrue(isinstance(dir.get_workingtree_transport(None),
                                   transport.Transport))
        # with a given format, either the bzr dir supports identifiable
        # trees, or it supports anonymous tree formats, but not both.
        anonymous_format = workingtree.WorkingTreeFormat2()
        identifiable_format = workingtree.WorkingTreeFormat3()
        try:
            found_transport = dir.get_workingtree_transport(anonymous_format)
            self.assertRaises(errors.IncompatibleFormat,
                              dir.get_workingtree_transport,
                              identifiable_format)
        except errors.IncompatibleFormat:
            found_transport = dir.get_workingtree_transport(identifiable_format)
        self.assertTrue(isinstance(found_transport, transport.Transport))
        # and the dir which has been initialized for us must be statable.
        found_transport.stat('.')

    def test_root_transport(self):
        dir = self.make_bzrdir('.')
        self.assertEqual(dir.root_transport.base,
                         get_transport(self.get_url('.')).base)

    def test_find_repository_no_repo_under_standalone_branch(self):
        # finding a repo stops at standalone branches even if there is a
        # higher repository available.
        try:
            repo = self.make_repository('.', shared=True)
        except errors.IncompatibleFormat:
            # need a shared repository to test this.
            return
        url = self.get_url('intermediate')
        get_transport(self.get_url()).mkdir('intermediate')
        get_transport(self.get_url()).mkdir('intermediate/child')
        made_control = self.bzrdir_format.initialize(url)
        made_control.create_repository()
        innermost_control = self.bzrdir_format.initialize(
            self.get_url('intermediate/child'))
        try:
            child_repo = innermost_control.open_repository()
            # if there is a repository, then the format cannot ever hit this 
            # code path.
            return
        except errors.NoRepositoryPresent:
            pass
        self.assertRaises(errors.NoRepositoryPresent,
                          innermost_control.find_repository)

    def test_find_repository_containing_shared_repository(self):
        # find repo inside a shared repo with an empty control dir
        # returns the shared repo.
        try:
            repo = self.make_repository('.', shared=True)
        except errors.IncompatibleFormat:
            # need a shared repository to test this.
            return
        url = self.get_url('childbzrdir')
        get_transport(self.get_url()).mkdir('childbzrdir')
        made_control = self.bzrdir_format.initialize(url)
        try:
            child_repo = made_control.open_repository()
            # if there is a repository, then the format cannot ever hit this 
            # code path.
            return
        except errors.NoRepositoryPresent:
            pass
        found_repo = made_control.find_repository()
        self.assertEqual(repo.bzrdir.root_transport.base,
                         found_repo.bzrdir.root_transport.base)
        
    def test_find_repository_standalone_with_containing_shared_repository(self):
        # find repo inside a standalone repo inside a shared repo finds the standalone repo
        try:
            containing_repo = self.make_repository('.', shared=True)
        except errors.IncompatibleFormat:
            # need a shared repository to test this.
            return
        child_repo = self.make_repository('childrepo')
        opened_control = bzrdir.BzrDir.open(self.get_url('childrepo'))
        found_repo = opened_control.find_repository()
        self.assertEqual(child_repo.bzrdir.root_transport.base,
                         found_repo.bzrdir.root_transport.base)

    def test_find_repository_shared_within_shared_repository(self):
        # find repo at a shared repo inside a shared repo finds the inner repo
        try:
            containing_repo = self.make_repository('.', shared=True)
        except errors.IncompatibleFormat:
            # need a shared repository to test this.
            return
        url = self.get_url('childrepo')
        get_transport(self.get_url()).mkdir('childrepo')
        child_control = self.bzrdir_format.initialize(url)
        child_repo = child_control.create_repository(shared=True)
        opened_control = bzrdir.BzrDir.open(self.get_url('childrepo'))
        found_repo = opened_control.find_repository()
        self.assertEqual(child_repo.bzrdir.root_transport.base,
                         found_repo.bzrdir.root_transport.base)
        self.assertNotEqual(child_repo.bzrdir.root_transport.base,
                            containing_repo.bzrdir.root_transport.base)

    def test_find_repository_with_nested_dirs_works(self):
        # find repo inside a bzrdir inside a bzrdir inside a shared repo 
        # finds the outer shared repo.
        try:
            repo = self.make_repository('.', shared=True)
        except errors.IncompatibleFormat:
            # need a shared repository to test this.
            return
        url = self.get_url('intermediate')
        get_transport(self.get_url()).mkdir('intermediate')
        get_transport(self.get_url()).mkdir('intermediate/child')
        made_control = self.bzrdir_format.initialize(url)
        try:
            child_repo = made_control.open_repository()
            # if there is a repository, then the format cannot ever hit this 
            # code path.
            return
        except errors.NoRepositoryPresent:
            pass
        innermost_control = self.bzrdir_format.initialize(
            self.get_url('intermediate/child'))
        try:
            child_repo = innermost_control.open_repository()
            # if there is a repository, then the format cannot ever hit this 
            # code path.
            return
        except errors.NoRepositoryPresent:
            pass
        found_repo = innermost_control.find_repository()
        self.assertEqual(repo.bzrdir.root_transport.base,
                         found_repo.bzrdir.root_transport.base)
        
    def test_can_and_needs_format_conversion(self):
        # check that we can ask an instance if its upgradable
        dir = self.make_bzrdir('.')
        if dir.can_convert_format():
            # if its default updatable there must be an updater 
            # (we change the default to match the lastest known format
            # as downgrades may not be available
            old_format = bzrdir.BzrDirFormat.get_default_format()
            bzrdir.BzrDirFormat.set_default_format(dir._format)
            try:
                self.assertTrue(isinstance(dir._format.get_converter(),
                                           bzrdir.Converter))
            finally:
                bzrdir.BzrDirFormat.set_default_format(old_format)
        dir.needs_format_conversion(None)

    def test_upgrade_new_instance(self):
        """Does an available updater work ?."""
        dir = self.make_bzrdir('.')
        # for now, check is not ready for partial bzrdirs.
        dir.create_repository()
        dir.create_branch()
        dir.create_workingtree()
        if dir.can_convert_format():
            # if its default updatable there must be an updater 
            # (we change the default to match the lastest known format
            # as downgrades may not be available
            old_format = bzrdir.BzrDirFormat.get_default_format()
            bzrdir.BzrDirFormat.set_default_format(dir._format)
            pb = ui.ui_factory.nested_progress_bar()
            try:
                dir._format.get_converter(None).convert(dir, pb)
            finally:
                bzrdir.BzrDirFormat.set_default_format(old_format)
                pb.finished()
            # and it should pass 'check' now.
            check(bzrdir.BzrDir.open(self.get_url('.')).open_branch(), False)

    def test_format_description(self):
        dir = self.make_bzrdir('.')
        text = dir._format.get_format_description()
        self.failUnless(len(text))


class TestBreakLock(TestCaseWithBzrDir):

    def setUp(self):
        super(TestBreakLock, self).setUp()
        # we want a UI factory that accepts canned input for the tests:
        # while SilentUIFactory still accepts stdin, we need to customise
        # ours
        self.old_factory = bzrlib.ui.ui_factory
        self.addCleanup(self.restoreFactory)
        bzrlib.ui.ui_factory = bzrlib.ui.SilentUIFactory()

    def restoreFactory(self):
        bzrlib.ui.ui_factory = self.old_factory

    def test_break_lock_empty(self):
        # break lock on an empty bzrdir should work silently.
        dir = self.make_bzrdir('.')
        try:
            dir.break_lock()
        except NotImplementedError:
            pass

    def test_break_lock_repository(self):
        # break lock with just a repo should unlock the repo.
        repo = self.make_repository('.')
        repo.lock_write()
        # only one yes needed here: it should only be unlocking
        # the repo
        bzrlib.ui.ui_factory.stdin = StringIO("y\n")
        try:
            repo.bzrdir.break_lock()
        except NotImplementedError:
            # this bzrdir does not implement break_lock - so we cant test it.
            repo.unlock()
            return
        lock_repo = repo.bzrdir.open_repository()
        lock_repo.lock_write()
        lock_repo.unlock()
        self.assertRaises(errors.LockBroken, repo.unlock)

    def test_break_lock_branch(self):
        # break lock with just a repo should unlock the branch.
        # and not directly try the repository.
        # we test this by making a branch reference to a branch
        # and repository in another bzrdir
        # for pre-metadir formats this will fail, thats ok.
        master = self.make_branch('branch')
        thisdir = self.make_bzrdir('this')
        try:
            bzrlib.branch.BranchReferenceFormat().initialize(
                thisdir, master)
        except errors.IncompatibleFormat:
            return
        unused_repo = thisdir.create_repository()
        master.lock_write()
        unused_repo.lock_write()
        # two yes's : branch and repository. If the repo in this
        # dir is inappropriately accessed, 3 will be needed, and
        # we'll see that because the stream will be fully consumed
        bzrlib.ui.ui_factory.stdin = StringIO("y\ny\ny\n")
        master.bzrdir.break_lock()
        # only two ys should have been read
        self.assertEqual("y\n", bzrlib.ui.ui_factory.stdin.read())
        # we should be able to lock a newly opened branch now
        branch = master.bzrdir.open_branch()
        branch.lock_write()
        branch.unlock()
        # we should not be able to lock the repository in thisdir as its still
        # held by the explicit lock we took, and the break lock should not have
        # touched it.
        repo = thisdir.open_repository()
        self.assertRaises(errors.LockContention, repo.lock_write)
        unused_repo.unlock()
        self.assertRaises(errors.LockBroken, master.unlock)

    def test_break_lock_tree(self):
        # break lock with a tree should unlock the tree but not try the 
        # branch explicitly. However this is very hard to test for as we 
        # dont have a tree reference class, nor is one needed; 
        # the worst case if this code unlocks twice is an extra question
        # being asked.
        tree = self.make_branch_and_tree('.')
        tree.lock_write()
        # three yes's : tree, branch and repository.
        bzrlib.ui.ui_factory.stdin = StringIO("y\ny\ny\ny\n")
        try:
            tree.bzrdir.break_lock()
        except NotImplementedError:
            # bzrdir does not support break_lock
            tree.unlock()
            return
        self.assertEqual("y\n", bzrlib.ui.ui_factory.stdin.read())
        lock_tree = tree.bzrdir.open_workingtree()
        lock_tree.lock_write()
        lock_tree.unlock()
        self.assertRaises(errors.LockBroken, tree.unlock)


class ChrootedBzrDirTests(ChrootedTestCase):

    def test_find_repository_no_repository(self):
        # loopback test to check the current format fails to find a 
        # share repository correctly.
        if not self.bzrdir_format.is_supported():
            # unsupported formats are not loopback testable
            # because the default open will not open them and
            # they may not be initializable.
            return
        # supported formats must be able to init and open
        url = self.get_url('subdir')
        get_transport(self.get_url()).mkdir('subdir')
        made_control = self.bzrdir_format.initialize(url)
        try:
            repo = made_control.open_repository()
            # if there is a repository, then the format cannot ever hit this 
            # code path.
            return
        except errors.NoRepositoryPresent:
            pass
        opened_control = bzrdir.BzrDir.open(self.get_readonly_url('subdir'))
        self.assertRaises(errors.NoRepositoryPresent,
                          opened_control.find_repository)
