~bzr-pqm/bzr/bzr.dev

# Copyright (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 the BzrDir facility and any format specific tests.

For interface contract tests, see tests/bzr_dir_implementations.

"""

from StringIO import StringIO

import bzrlib.branch

import bzrlib.bzrdir as bzrdir

import bzrlib.errors as errors

from bzrlib.errors import (NotBranchError,

                           UnknownFormatError,

                           UnsupportedFormatError,

                           )

import bzrlib.repository as repository

from bzrlib.tests import TestCase, TestCaseWithTransport

from bzrlib.transport import get_transport

from bzrlib.transport.http import HttpServer

from bzrlib.transport.memory import MemoryServer

import bzrlib.workingtree as workingtree

class TestDefaultFormat(TestCase):

    def test_get_set_default_format(self):

        old_format = bzrdir.BzrDirFormat.get_default_format()

        # default is BzrDirFormat6

        self.failUnless(isinstance(old_format, bzrdir.BzrDirMetaFormat1))

        bzrdir.BzrDirFormat.set_default_format(SampleBzrDirFormat())

        # creating a bzr dir should now create an instrumented dir.

        try:

            result = bzrdir.BzrDir.create('memory:///')

            self.failUnless(isinstance(result, SampleBzrDir))

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

        self.assertEqual(old_format, bzrdir.BzrDirFormat.get_default_format())

class SampleBranch(bzrlib.branch.Branch):

    """A dummy branch for guess what, dummy use."""

    def __init__(self, dir):

        self.bzrdir = dir

class SampleBzrDir(bzrdir.BzrDir):

    """A sample BzrDir implementation to allow testing static methods."""

    def create_repository(self, shared=False):

        """See BzrDir.create_repository."""

        return "A repository"

    def open_repository(self):

        """See BzrDir.open_repository."""

        return "A repository"

    def create_branch(self):

        """See BzrDir.create_branch."""

        return SampleBranch(self)

    def create_workingtree(self):

        """See BzrDir.create_workingtree."""

        return "A tree"

class SampleBzrDirFormat(bzrdir.BzrDirFormat):

    """A sample format

    this format is initializable, unsupported to aid in testing the 

    open and open_downlevel routines.

    """

    def get_format_string(self):

        """See BzrDirFormat.get_format_string()."""

        return "Sample .bzr dir format."

    def initialize(self, url):

        """Create a bzr dir."""

        t = get_transport(url)

        t.mkdir('.bzr')

        t.put_bytes('.bzr/branch-format', self.get_format_string())

        return SampleBzrDir(t, self)

    def is_supported(self):

        return False

    def open(self, transport, _found=None):

        return "opened branch."

class TestBzrDirFormat(TestCaseWithTransport):

    """Tests for the BzrDirFormat facility."""

    def test_find_format(self):

        # is the right format object found for a branch?

        # create a branch with a few known format objects.

        # this is not quite the same as 

        t = get_transport(self.get_url())

        self.build_tree(["foo/", "bar/"], transport=t)

        def check_format(format, url):

            format.initialize(url)

            t = get_transport(url)

            found_format = bzrdir.BzrDirFormat.find_format(t)

            self.failUnless(isinstance(found_format, format.__class__))

        check_format(bzrdir.BzrDirFormat5(), "foo")

        check_format(bzrdir.BzrDirFormat6(), "bar")

    def test_find_format_nothing_there(self):

        self.assertRaises(NotBranchError,

                          bzrdir.BzrDirFormat.find_format,

                          get_transport('.'))

    def test_find_format_unknown_format(self):

        t = get_transport(self.get_url())

        t.mkdir('.bzr')

        t.put_bytes('.bzr/branch-format', '')

        self.assertRaises(UnknownFormatError,

                          bzrdir.BzrDirFormat.find_format,

                          get_transport('.'))

    def test_register_unregister_format(self):

        format = SampleBzrDirFormat()

        url = self.get_url()

        # make a bzrdir

        format.initialize(url)

        # register a format for it.

        bzrdir.BzrDirFormat.register_format(format)

        # which bzrdir.Open will refuse (not supported)

        self.assertRaises(UnsupportedFormatError, bzrdir.BzrDir.open, url)

        # which bzrdir.open_containing will refuse (not supported)

        self.assertRaises(UnsupportedFormatError, bzrdir.BzrDir.open_containing, url)

        # but open_downlevel will work

        t = get_transport(url)

        self.assertEqual(format.open(t), bzrdir.BzrDir.open_unsupported(url))

        # unregister the format

        bzrdir.BzrDirFormat.unregister_format(format)

        # now open_downlevel should fail too.

        self.assertRaises(UnknownFormatError, bzrdir.BzrDir.open_unsupported, url)

    def test_create_repository(self):

        format = SampleBzrDirFormat()

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(format)

        try:

            repo = bzrdir.BzrDir.create_repository(self.get_url())

            self.assertEqual('A repository', repo)

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_repository_shared(self):

        old_format = bzrdir.BzrDirFormat.get_default_format()

        repo = bzrdir.BzrDir.create_repository('.', shared=True)

        self.assertTrue(repo.is_shared())

    def test_create_repository_nonshared(self):

        old_format = bzrdir.BzrDirFormat.get_default_format()

        repo = bzrdir.BzrDir.create_repository('.')

        self.assertFalse(repo.is_shared())

    def test_create_repository_under_shared(self):

        # an explicit create_repository always does so.

        # we trust the format is right from the 'create_repository test'

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            self.make_repository('.', shared=True)

            repo = bzrdir.BzrDir.create_repository(self.get_url('child'))

            self.assertTrue(isinstance(repo, repository.Repository))

            self.assertTrue(repo.bzrdir.root_transport.base.endswith('child/'))

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_branch_and_repo_uses_default(self):

        format = SampleBzrDirFormat()

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(format)

        try:

            branch = bzrdir.BzrDir.create_branch_and_repo(self.get_url())

            self.assertTrue(isinstance(branch, SampleBranch))

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_branch_and_repo_under_shared(self):

        # creating a branch and repo in a shared repo uses the

        # shared repository

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            self.make_repository('.', shared=True)

            branch = bzrdir.BzrDir.create_branch_and_repo(self.get_url('child'))

            self.assertRaises(errors.NoRepositoryPresent,

                              branch.bzrdir.open_repository)

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_branch_and_repo_under_shared_force_new(self):

        # creating a branch and repo in a shared repo can be forced to 

        # make a new repo

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            self.make_repository('.', shared=True)

            branch = bzrdir.BzrDir.create_branch_and_repo(self.get_url('child'),

                                                          force_new_repo=True)

            branch.bzrdir.open_repository()

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_standalone_working_tree(self):

        format = SampleBzrDirFormat()

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(format)

        try:

            # note this is deliberately readonly, as this failure should 

            # occur before any writes.

            self.assertRaises(errors.NotLocalUrl,

                              bzrdir.BzrDir.create_standalone_workingtree,

                              self.get_readonly_url())

            tree = bzrdir.BzrDir.create_standalone_workingtree('.')

            self.assertEqual('A tree', tree)

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_standalone_working_tree_under_shared_repo(self):

        # create standalone working tree always makes a repo.

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            self.make_repository('.', shared=True)

            # note this is deliberately readonly, as this failure should 

            # occur before any writes.

            self.assertRaises(errors.NotLocalUrl,

                              bzrdir.BzrDir.create_standalone_workingtree,

                              self.get_readonly_url('child'))

            tree = bzrdir.BzrDir.create_standalone_workingtree('child')

            tree.bzrdir.open_repository()

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_branch_convenience(self):

        # outside a repo the default convenience output is a repo+branch_tree

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            branch = bzrdir.BzrDir.create_branch_convenience('.')

            branch.bzrdir.open_workingtree()

            branch.bzrdir.open_repository()

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_branch_convenience_root(self):

        """Creating a branch at the root of a fs should work."""

        self.transport_server = MemoryServer

        # outside a repo the default convenience output is a repo+branch_tree

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            branch = bzrdir.BzrDir.create_branch_convenience(self.get_url())

            self.assertRaises(errors.NoWorkingTree,

                              branch.bzrdir.open_workingtree)

            branch.bzrdir.open_repository()

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_branch_convenience_under_shared_repo(self):

        # inside a repo the default convenience output is a branch+ follow the

        # repo tree policy

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            self.make_repository('.', shared=True)

            branch = bzrdir.BzrDir.create_branch_convenience('child')

            branch.bzrdir.open_workingtree()

            self.assertRaises(errors.NoRepositoryPresent,

                              branch.bzrdir.open_repository)

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_branch_convenience_under_shared_repo_force_no_tree(self):

        # inside a repo the default convenience output is a branch+ follow the

        # repo tree policy but we can override that

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            self.make_repository('.', shared=True)

            branch = bzrdir.BzrDir.create_branch_convenience('child',

                force_new_tree=False)

            self.assertRaises(errors.NoWorkingTree,

                              branch.bzrdir.open_workingtree)

            self.assertRaises(errors.NoRepositoryPresent,

                              branch.bzrdir.open_repository)

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_branch_convenience_under_shared_repo_no_tree_policy(self):

        # inside a repo the default convenience output is a branch+ follow the

        # repo tree policy

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            repo = self.make_repository('.', shared=True)

            repo.set_make_working_trees(False)

            branch = bzrdir.BzrDir.create_branch_convenience('child')

            self.assertRaises(errors.NoWorkingTree,

                              branch.bzrdir.open_workingtree)

            self.assertRaises(errors.NoRepositoryPresent,

                              branch.bzrdir.open_repository)

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_branch_convenience_under_shared_repo_no_tree_policy_force_tree(self):

        # inside a repo the default convenience output is a branch+ follow the

        # repo tree policy but we can override that

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            repo = self.make_repository('.', shared=True)

            repo.set_make_working_trees(False)

            branch = bzrdir.BzrDir.create_branch_convenience('child',

                force_new_tree=True)

            branch.bzrdir.open_workingtree()

            self.assertRaises(errors.NoRepositoryPresent,

                              branch.bzrdir.open_repository)

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_branch_convenience_under_shared_repo_force_new_repo(self):

        # inside a repo the default convenience output is overridable to give

        # repo+branch+tree

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            self.make_repository('.', shared=True)

            branch = bzrdir.BzrDir.create_branch_convenience('child',

                force_new_repo=True)

            branch.bzrdir.open_repository()

            branch.bzrdir.open_workingtree()

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

class ChrootedTests(TestCaseWithTransport):

    """A support class that provides readonly urls outside the local namespace.

    This is done by checking if self.transport_server is a MemoryServer. if it

    is then we are chrooted already, if it is not then an HttpServer is used

    for readonly urls.

    """

    def setUp(self):

        super(ChrootedTests, self).setUp()

        if not self.transport_server == MemoryServer:

            self.transport_readonly_server = HttpServer

    def test_open_containing(self):

        self.assertRaises(NotBranchError, bzrdir.BzrDir.open_containing,

                          self.get_readonly_url(''))

        self.assertRaises(NotBranchError, bzrdir.BzrDir.open_containing,

                          self.get_readonly_url('g/p/q'))

        control = bzrdir.BzrDir.create(self.get_url())

        branch, relpath = bzrdir.BzrDir.open_containing(self.get_readonly_url(''))

        self.assertEqual('', relpath)

        branch, relpath = bzrdir.BzrDir.open_containing(self.get_readonly_url('g/p/q'))

        self.assertEqual('g/p/q', relpath)

    def test_open_containing_from_transport(self):

        self.assertRaises(NotBranchError, bzrdir.BzrDir.open_containing_from_transport,

                          get_transport(self.get_readonly_url('')))

        self.assertRaises(NotBranchError, bzrdir.BzrDir.open_containing_from_transport,

                          get_transport(self.get_readonly_url('g/p/q')))

        control = bzrdir.BzrDir.create(self.get_url())

        branch, relpath = bzrdir.BzrDir.open_containing_from_transport(

            get_transport(self.get_readonly_url('')))

        self.assertEqual('', relpath)

        branch, relpath = bzrdir.BzrDir.open_containing_from_transport(

            get_transport(self.get_readonly_url('g/p/q')))

        self.assertEqual('g/p/q', relpath)

    def test_open_from_transport(self):

        # transport pointing at bzrdir should give a bzrdir with root transport

        # set to the given transport

        control = bzrdir.BzrDir.create(self.get_url())

        transport = get_transport(self.get_url())

        opened_bzrdir = bzrdir.BzrDir.open_from_transport(transport)

        self.assertEqual(transport.base, opened_bzrdir.root_transport.base)

        self.assertIsInstance(opened_bzrdir, bzrdir.BzrDir)

    def test_open_from_transport_no_bzrdir(self):

        transport = get_transport(self.get_url())

        self.assertRaises(NotBranchError, bzrdir.BzrDir.open_from_transport,

                          transport)

    def test_open_from_transport_bzrdir_in_parent(self):

        control = bzrdir.BzrDir.create(self.get_url())

        transport = get_transport(self.get_url())

        transport.mkdir('subdir')

        transport = transport.clone('subdir')

        self.assertRaises(NotBranchError, bzrdir.BzrDir.open_from_transport,

                          transport)

class TestMeta1DirFormat(TestCaseWithTransport):

    """Tests specific to the meta1 dir format."""

    def test_right_base_dirs(self):

        dir = bzrdir.BzrDirMetaFormat1().initialize(self.get_url())

        t = dir.transport

        branch_base = t.clone('branch').base

        self.assertEqual(branch_base, dir.get_branch_transport(None).base)

        self.assertEqual(branch_base,

                         dir.get_branch_transport(bzrlib.branch.BzrBranchFormat5()).base)

        repository_base = t.clone('repository').base

        self.assertEqual(repository_base, dir.get_repository_transport(None).base)

        self.assertEqual(repository_base,

                         dir.get_repository_transport(repository.RepositoryFormat7()).base)

        checkout_base = t.clone('checkout').base

        self.assertEqual(checkout_base, dir.get_workingtree_transport(None).base)

        self.assertEqual(checkout_base,

                         dir.get_workingtree_transport(workingtree.WorkingTreeFormat3()).base)

    def test_meta1dir_uses_lockdir(self):

        """Meta1 format uses a LockDir to guard the whole directory, not a file."""

        dir = bzrdir.BzrDirMetaFormat1().initialize(self.get_url())

        t = dir.transport

        self.assertIsDirectory('branch-lock', t)

class TestFormat5(TestCaseWithTransport):

    """Tests specific to the version 5 bzrdir format."""

    def test_same_lockfiles_between_tree_repo_branch(self):

        # this checks that only a single lockfiles instance is created 

        # for format 5 objects

        dir = bzrdir.BzrDirFormat5().initialize(self.get_url())

        def check_dir_components_use_same_lock(dir):

            ctrl_1 = dir.open_repository().control_files

            ctrl_2 = dir.open_branch().control_files

            ctrl_3 = dir.open_workingtree()._control_files

            self.assertTrue(ctrl_1 is ctrl_2)

            self.assertTrue(ctrl_2 is ctrl_3)

        check_dir_components_use_same_lock(dir)

        # and if we open it normally.

        dir = bzrdir.BzrDir.open(self.get_url())

        check_dir_components_use_same_lock(dir)

    def test_can_convert(self):

        # format 5 dirs are convertable

        dir = bzrdir.BzrDirFormat5().initialize(self.get_url())

        self.assertTrue(dir.can_convert_format())

    def test_needs_conversion(self):

        # format 5 dirs need a conversion if they are not the default.

        # and they start of not the default.

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirFormat5())

        try:

            dir = bzrdir.BzrDirFormat5().initialize(self.get_url())

            self.assertFalse(dir.needs_format_conversion())

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

        self.assertTrue(dir.needs_format_conversion())

class TestFormat6(TestCaseWithTransport):

    """Tests specific to the version 6 bzrdir format."""

    def test_same_lockfiles_between_tree_repo_branch(self):

        # this checks that only a single lockfiles instance is created 

        # for format 6 objects

        dir = bzrdir.BzrDirFormat6().initialize(self.get_url())

        def check_dir_components_use_same_lock(dir):

            ctrl_1 = dir.open_repository().control_files

            ctrl_2 = dir.open_branch().control_files

            ctrl_3 = dir.open_workingtree()._control_files

            self.assertTrue(ctrl_1 is ctrl_2)

            self.assertTrue(ctrl_2 is ctrl_3)

        check_dir_components_use_same_lock(dir)

        # and if we open it normally.

        dir = bzrdir.BzrDir.open(self.get_url())

        check_dir_components_use_same_lock(dir)

    def test_can_convert(self):

        # format 6 dirs are convertable

        dir = bzrdir.BzrDirFormat6().initialize(self.get_url())

        self.assertTrue(dir.can_convert_format())

    def test_needs_conversion(self):

        # format 6 dirs need an conversion if they are not the default.

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            dir = bzrdir.BzrDirFormat6().initialize(self.get_url())

            self.assertTrue(dir.needs_format_conversion())

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

class NotBzrDir(bzrlib.bzrdir.BzrDir):

    """A non .bzr based control directory."""

    def __init__(self, transport, format):

        self._format = format

        self.root_transport = transport

        self.transport = transport.clone('.not')

class NotBzrDirFormat(bzrlib.bzrdir.BzrDirFormat):

    """A test class representing any non-.bzr based disk format."""

    def initialize_on_transport(self, transport):

        """Initialize a new .not dir in the base directory of a Transport."""

        transport.mkdir('.not')

        return self.open(transport)

    def open(self, transport):

        """Open this directory."""

        return NotBzrDir(transport, self)

    @classmethod

    def _known_formats(self):

        return set([NotBzrDirFormat()])

    @classmethod

    def probe_transport(self, transport):

        """Our format is present if the transport ends in '.not/'."""

        if transport.has('.not'):

            return NotBzrDirFormat()

class TestNotBzrDir(TestCaseWithTransport):

    """Tests for using the bzrdir api with a non .bzr based disk format.

    If/when one of these is in the core, we can let the implementation tests

    verify this works.

    """

    def test_create_and_find_format(self):

        # create a .notbzr dir 

        format = NotBzrDirFormat()

        dir = format.initialize(self.get_url())

        self.assertIsInstance(dir, NotBzrDir)

        # now probe for it.

        bzrlib.bzrdir.BzrDirFormat.register_control_format(format)

        try:

            found = bzrlib.bzrdir.BzrDirFormat.find_format(

                get_transport(self.get_url()))

            self.assertIsInstance(found, NotBzrDirFormat)

        finally:

            bzrlib.bzrdir.BzrDirFormat.unregister_control_format(format)

    def test_included_in_known_formats(self):

        bzrlib.bzrdir.BzrDirFormat.register_control_format(NotBzrDirFormat)

        try:

            formats = bzrlib.bzrdir.BzrDirFormat.known_formats()

            for format in formats:

                if isinstance(format, NotBzrDirFormat):

                    return

            self.fail("No NotBzrDirFormat in %s" % formats)

        finally:

            bzrlib.bzrdir.BzrDirFormat.unregister_control_format(NotBzrDirFormat)

class NonLocalTests(TestCaseWithTransport):

    """Tests for bzrdir static behaviour on non local paths."""

    def setUp(self):

        super(NonLocalTests, self).setUp()

        self.transport_server = MemoryServer

    def test_create_branch_convenience(self):

        # outside a repo the default convenience output is a repo+branch_tree

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            branch = bzrdir.BzrDir.create_branch_convenience(self.get_url('foo'))

            self.assertRaises(errors.NoWorkingTree,

                              branch.bzrdir.open_workingtree)

            branch.bzrdir.open_repository()

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_create_branch_convenience_force_tree_not_local_fails(self):

        # outside a repo the default convenience output is a repo+branch_tree

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            self.assertRaises(errors.NotLocalUrl,

                bzrdir.BzrDir.create_branch_convenience,

                self.get_url('foo'),

                force_new_tree=True)

            t = get_transport(self.get_url('.'))

            self.assertFalse(t.has('foo'))

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

    def test_clone(self):

        # clone into a nonlocal path works

        old_format = bzrdir.BzrDirFormat.get_default_format()

        bzrdir.BzrDirFormat.set_default_format(bzrdir.BzrDirMetaFormat1())

        try:

            branch = bzrdir.BzrDir.create_branch_convenience('local')

        finally:

            bzrdir.BzrDirFormat.set_default_format(old_format)

        branch.bzrdir.open_workingtree()

        result = branch.bzrdir.clone(self.get_url('remote'))

        self.assertRaises(errors.NoWorkingTree,

                          result.open_workingtree)

        result.open_branch()

        result.open_repository()