~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005, 2006, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Tests for the Branch facility that are not interface  tests.

For interface tests see tests/per_branch/*.py.

For concrete class tests see this file, and for meta-branch tests

also see this file.

"""

from StringIO import StringIO

from bzrlib import (

    branch as _mod_branch,

    bzrdir,

    config,

    errors,

    trace,

    urlutils,

    )

from bzrlib.branch import (

    Branch,

    BranchHooks,

    BranchFormat,

    BranchReferenceFormat,

    BzrBranch5,

    BzrBranchFormat5,

    BzrBranchFormat6,

    PullResult,

    _run_with_write_locked_target,

    )

from bzrlib.bzrdir import (BzrDirMetaFormat1, BzrDirMeta1,

                           BzrDir, BzrDirFormat)

from bzrlib.errors import (NotBranchError,

                           UnknownFormatError,

                           UnknownHook,

                           UnsupportedFormatError,

                           )

from bzrlib.tests import TestCase, TestCaseWithTransport

from bzrlib.transport import get_transport

class TestDefaultFormat(TestCase):

    def test_default_format(self):

        # update this if you change the default branch format

        self.assertIsInstance(BranchFormat.get_default_format(),

                BzrBranchFormat6)

    def test_default_format_is_same_as_bzrdir_default(self):

        # XXX: it might be nice if there was only one place the default was

        # set, but at the moment that's not true -- mbp 20070814 --

        # https://bugs.launchpad.net/bzr/+bug/132376

        self.assertEqual(BranchFormat.get_default_format(),

                BzrDirFormat.get_default_format().get_branch_format())

    def test_get_set_default_format(self):

        # set the format and then set it back again

        old_format = BranchFormat.get_default_format()

        BranchFormat.set_default_format(SampleBranchFormat())

        try:

            # the default branch format is used by the meta dir format

            # which is not the default bzrdir format at this point

            dir = BzrDirMetaFormat1().initialize('memory:///')

            result = dir.create_branch()

            self.assertEqual(result, 'A branch')

        finally:

            BranchFormat.set_default_format(old_format)

        self.assertEqual(old_format, BranchFormat.get_default_format())

class TestBranchFormat5(TestCaseWithTransport):

    """Tests specific to branch format 5"""

    def test_branch_format_5_uses_lockdir(self):

        url = self.get_url()

        bzrdir = BzrDirMetaFormat1().initialize(url)

        bzrdir.create_repository()

        branch = bzrdir.create_branch()

        t = self.get_transport()

        self.log("branch instance is %r" % branch)

        self.assert_(isinstance(branch, BzrBranch5))

        self.assertIsDirectory('.', t)

        self.assertIsDirectory('.bzr/branch', t)

        self.assertIsDirectory('.bzr/branch/lock', t)

        branch.lock_write()

        try:

            self.assertIsDirectory('.bzr/branch/lock/held', t)

        finally:

            branch.unlock()

    def test_set_push_location(self):

        from bzrlib.config import (locations_config_filename,

                                   ensure_config_dir_exists)

        ensure_config_dir_exists()

        fn = locations_config_filename()

        # write correct newlines to locations.conf

        # by default ConfigObj uses native line-endings for new files

        # but uses already existing line-endings if file is not empty

        f = open(fn, 'wb')

        try:

            f.write('# comment\n')

        finally:

            f.close()

        branch = self.make_branch('.', format='knit')

        branch.set_push_location('foo')

        local_path = urlutils.local_path_from_url(branch.base[:-1])

        self.assertFileEqual("# comment\n"

                             "[%s]\n"

                             "push_location = foo\n"

                             "push_location:policy = norecurse\n" % local_path,

                             fn)

    # TODO RBC 20051029 test getting a push location from a branch in a

    # recursive section - that is, it appends the branch name.

class SampleBranchFormat(BranchFormat):

    """A sample format

    this format is initializable, unsupported to aid in testing the

    open and open_downlevel routines.

    """

    def get_format_string(self):

        """See BzrBranchFormat.get_format_string()."""

        return "Sample branch format."

    def initialize(self, a_bzrdir):

        """Format 4 branches cannot be created."""

        t = a_bzrdir.get_branch_transport(self)

        t.put_bytes('format', self.get_format_string())

        return 'A branch'

    def is_supported(self):

        return False

    def open(self, transport, _found=False, ignore_fallbacks=False):

        return "opened branch."

class TestBzrBranchFormat(TestCaseWithTransport):

    """Tests for the BzrBranchFormat 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

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

        def check_format(format, url):

            dir = format._matchingbzrdir.initialize(url)

            dir.create_repository()

            format.initialize(dir)

            found_format = BranchFormat.find_format(dir)

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

        check_format(BzrBranchFormat5(), "bar")

    def test_find_format_not_branch(self):

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

        self.assertRaises(NotBranchError,

                          BranchFormat.find_format,

                          dir)

    def test_find_format_unknown_format(self):

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

        SampleBranchFormat().initialize(dir)

        self.assertRaises(UnknownFormatError,

                          BranchFormat.find_format,

                          dir)

    def test_register_unregister_format(self):

        format = SampleBranchFormat()

        # make a control dir

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

        # make a branch

        format.initialize(dir)

        # register a format for it.

        BranchFormat.register_format(format)

        # which branch.Open will refuse (not supported)

        self.assertRaises(UnsupportedFormatError, Branch.open, self.get_url())

        self.make_branch_and_tree('foo')

        # but open_downlevel will work

        self.assertEqual(format.open(dir), bzrdir.BzrDir.open(self.get_url()).open_branch(unsupported=True))

        # unregister the format

        BranchFormat.unregister_format(format)

        self.make_branch_and_tree('bar')

class TestBranch67(object):

    """Common tests for both branch 6 and 7 which are mostly the same."""

    def get_format_name(self):

        raise NotImplementedError(self.get_format_name)

    def get_format_name_subtree(self):

        raise NotImplementedError(self.get_format_name)

    def get_class(self):

        raise NotImplementedError(self.get_class)

    def test_creation(self):

        format = BzrDirMetaFormat1()

        format.set_branch_format(_mod_branch.BzrBranchFormat6())

        branch = self.make_branch('a', format=format)

        self.assertIsInstance(branch, self.get_class())

        branch = self.make_branch('b', format=self.get_format_name())

        self.assertIsInstance(branch, self.get_class())

        branch = _mod_branch.Branch.open('a')

        self.assertIsInstance(branch, self.get_class())

    def test_layout(self):

        branch = self.make_branch('a', format=self.get_format_name())

        self.failUnlessExists('a/.bzr/branch/last-revision')

        self.failIfExists('a/.bzr/branch/revision-history')

        self.failIfExists('a/.bzr/branch/references')

    def test_config(self):

        """Ensure that all configuration data is stored in the branch"""

        branch = self.make_branch('a', format=self.get_format_name())

        branch.set_parent('http://bazaar-vcs.org')

        self.failIfExists('a/.bzr/branch/parent')

        self.assertEqual('http://bazaar-vcs.org', branch.get_parent())

        branch.set_push_location('sftp://bazaar-vcs.org')

        config = branch.get_config()._get_branch_data_config()

        self.assertEqual('sftp://bazaar-vcs.org',

                         config.get_user_option('push_location'))

        branch.set_bound_location('ftp://bazaar-vcs.org')

        self.failIfExists('a/.bzr/branch/bound')

        self.assertEqual('ftp://bazaar-vcs.org', branch.get_bound_location())

    def test_set_revision_history(self):

        builder = self.make_branch_builder('.', format=self.get_format_name())

        builder.build_snapshot('foo', None,

            [('add', ('', None, 'directory', None))],

            message='foo')

        builder.build_snapshot('bar', None, [], message='bar')

        branch = builder.get_branch()

        branch.lock_write()

        self.addCleanup(branch.unlock)

        branch.set_revision_history(['foo', 'bar'])

        branch.set_revision_history(['foo'])

        self.assertRaises(errors.NotLefthandHistory,

                          branch.set_revision_history, ['bar'])

    def do_checkout_test(self, lightweight=False):

        tree = self.make_branch_and_tree('source',

            format=self.get_format_name_subtree())

        subtree = self.make_branch_and_tree('source/subtree',

            format=self.get_format_name_subtree())

        subsubtree = self.make_branch_and_tree('source/subtree/subsubtree',

            format=self.get_format_name_subtree())

        self.build_tree(['source/subtree/file',

                         'source/subtree/subsubtree/file'])

        subsubtree.add('file')

        subtree.add('file')

        subtree.add_reference(subsubtree)

        tree.add_reference(subtree)

        tree.commit('a revision')

        subtree.commit('a subtree file')

        subsubtree.commit('a subsubtree file')

        tree.branch.create_checkout('target', lightweight=lightweight)

        self.failUnlessExists('target')

        self.failUnlessExists('target/subtree')

        self.failUnlessExists('target/subtree/file')

        self.failUnlessExists('target/subtree/subsubtree/file')

        subbranch = _mod_branch.Branch.open('target/subtree/subsubtree')

        if lightweight:

            self.assertEndsWith(subbranch.base, 'source/subtree/subsubtree/')

        else:

            self.assertEndsWith(subbranch.base, 'target/subtree/subsubtree/')

    def test_checkout_with_references(self):

        self.do_checkout_test()

    def test_light_checkout_with_references(self):

        self.do_checkout_test(lightweight=True)

    def test_set_push(self):

        branch = self.make_branch('source', format=self.get_format_name())

        branch.get_config().set_user_option('push_location', 'old',

            store=config.STORE_LOCATION)

        warnings = []

        def warning(*args):

            warnings.append(args[0] % args[1:])

        _warning = trace.warning

        trace.warning = warning

        try:

            branch.set_push_location('new')

        finally:

            trace.warning = _warning

        self.assertEqual(warnings[0], 'Value "new" is masked by "old" from '

                         'locations.conf')

class TestBranch6(TestBranch67, TestCaseWithTransport):

    def get_class(self):

        return _mod_branch.BzrBranch6

    def get_format_name(self):

        return "dirstate-tags"

    def get_format_name_subtree(self):

        return "dirstate-with-subtree"

    def test_set_stacked_on_url_errors(self):

        branch = self.make_branch('a', format=self.get_format_name())

        self.assertRaises(errors.UnstackableBranchFormat,

            branch.set_stacked_on_url, None)

    def test_default_stacked_location(self):

        branch = self.make_branch('a', format=self.get_format_name())

        self.assertRaises(errors.UnstackableBranchFormat, branch.get_stacked_on_url)

class TestBranch7(TestBranch67, TestCaseWithTransport):

    def get_class(self):

        return _mod_branch.BzrBranch7

    def get_format_name(self):

        return "1.9"

    def get_format_name_subtree(self):

        return "development-subtree"

    def test_set_stacked_on_url_unstackable_repo(self):

        repo = self.make_repository('a', format='dirstate-tags')

        control = repo.bzrdir

        branch = _mod_branch.BzrBranchFormat7().initialize(control)

        target = self.make_branch('b')

        self.assertRaises(errors.UnstackableRepositoryFormat,

            branch.set_stacked_on_url, target.base)

    def test_clone_stacked_on_unstackable_repo(self):

        repo = self.make_repository('a', format='dirstate-tags')

        control = repo.bzrdir

        branch = _mod_branch.BzrBranchFormat7().initialize(control)

        # Calling clone should not raise UnstackableRepositoryFormat.

        cloned_bzrdir = control.clone('cloned')

    def _test_default_stacked_location(self):

        branch = self.make_branch('a', format=self.get_format_name())

        self.assertRaises(errors.NotStacked, branch.get_stacked_on_url)

    def test_stack_and_unstack(self):

        branch = self.make_branch('a', format=self.get_format_name())

        target = self.make_branch_and_tree('b', format=self.get_format_name())

        branch.set_stacked_on_url(target.branch.base)

        self.assertEqual(target.branch.base, branch.get_stacked_on_url())

        revid = target.commit('foo')

        self.assertTrue(branch.repository.has_revision(revid))

        branch.set_stacked_on_url(None)

        self.assertRaises(errors.NotStacked, branch.get_stacked_on_url)

        self.assertFalse(branch.repository.has_revision(revid))

    def test_open_opens_stacked_reference(self):

        branch = self.make_branch('a', format=self.get_format_name())

        target = self.make_branch_and_tree('b', format=self.get_format_name())

        branch.set_stacked_on_url(target.branch.base)

        branch = branch.bzrdir.open_branch()

        revid = target.commit('foo')

        self.assertTrue(branch.repository.has_revision(revid))

class BzrBranch8(TestCaseWithTransport):

    def make_branch(self, location, format=None):

        if format is None:

            format = bzrdir.format_registry.make_bzrdir('1.9')

            format.set_branch_format(_mod_branch.BzrBranchFormat8())

        return TestCaseWithTransport.make_branch(self, location, format=format)

    def create_branch_with_reference(self):

        branch = self.make_branch('branch')

        branch._set_all_reference_info({'file-id': ('path', 'location')})

        return branch

    @staticmethod

    def instrument_branch(branch, gets):

        old_get = branch._transport.get

        def get(*args, **kwargs):

            gets.append((args, kwargs))

            return old_get(*args, **kwargs)

        branch._transport.get = get

    def test_reference_info_caching_read_locked(self):

        gets = []

        branch = self.create_branch_with_reference()

        branch.lock_read()

        self.addCleanup(branch.unlock)

        self.instrument_branch(branch, gets)

        branch.get_reference_info('file-id')

        branch.get_reference_info('file-id')

        self.assertEqual(1, len(gets))

    def test_reference_info_caching_read_unlocked(self):

        gets = []

        branch = self.create_branch_with_reference()

        self.instrument_branch(branch, gets)

        branch.get_reference_info('file-id')

        branch.get_reference_info('file-id')

        self.assertEqual(2, len(gets))

    def test_reference_info_caching_write_locked(self):

        gets = []

        branch = self.make_branch('branch')

        branch.lock_write()

        self.instrument_branch(branch, gets)

        self.addCleanup(branch.unlock)

        branch._set_all_reference_info({'file-id': ('path2', 'location2')})

        path, location = branch.get_reference_info('file-id')

        self.assertEqual(0, len(gets))

        self.assertEqual('path2', path)

        self.assertEqual('location2', location)

    def test_reference_info_caches_cleared(self):

        branch = self.make_branch('branch')

        branch.lock_write()

        branch.set_reference_info('file-id', 'path2', 'location2')

        branch.unlock()

        doppelganger = Branch.open('branch')

        doppelganger.set_reference_info('file-id', 'path3', 'location3')

        self.assertEqual(('path3', 'location3'),

                         branch.get_reference_info('file-id'))

class TestBranchReference(TestCaseWithTransport):

    """Tests for the branch reference facility."""

    def test_create_open_reference(self):

        bzrdirformat = bzrdir.BzrDirMetaFormat1()

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

        t.mkdir('repo')

        dir = bzrdirformat.initialize(self.get_url('repo'))

        dir.create_repository()

        target_branch = dir.create_branch()

        t.mkdir('branch')

        branch_dir = bzrdirformat.initialize(self.get_url('branch'))

        made_branch = BranchReferenceFormat().initialize(branch_dir, target_branch)

        self.assertEqual(made_branch.base, target_branch.base)

        opened_branch = branch_dir.open_branch()

        self.assertEqual(opened_branch.base, target_branch.base)

    def test_get_reference(self):

        """For a BranchReference, get_reference should reutrn the location."""

        branch = self.make_branch('target')

        checkout = branch.create_checkout('checkout', lightweight=True)

        reference_url = branch.bzrdir.root_transport.abspath('') + '/'

        # if the api for create_checkout changes to return different checkout types

        # then this file read will fail.

        self.assertFileEqual(reference_url, 'checkout/.bzr/branch/location')

        self.assertEqual(reference_url,

            _mod_branch.BranchReferenceFormat().get_reference(checkout.bzrdir))

class TestHooks(TestCase):

    def test_constructor(self):

        """Check that creating a BranchHooks instance has the right defaults."""

        hooks = BranchHooks()

        self.assertTrue("set_rh" in hooks, "set_rh not in %s" % hooks)

        self.assertTrue("post_push" in hooks, "post_push not in %s" % hooks)

        self.assertTrue("post_commit" in hooks, "post_commit not in %s" % hooks)

        self.assertTrue("pre_commit" in hooks, "pre_commit not in %s" % hooks)

        self.assertTrue("post_pull" in hooks, "post_pull not in %s" % hooks)

        self.assertTrue("post_uncommit" in hooks, "post_uncommit not in %s" % hooks)

        self.assertTrue("post_change_branch_tip" in hooks,

                        "post_change_branch_tip not in %s" % hooks)

    def test_installed_hooks_are_BranchHooks(self):

        """The installed hooks object should be a BranchHooks."""

        # the installed hooks are saved in self._preserved_hooks.

        self.assertIsInstance(self._preserved_hooks[_mod_branch.Branch][1],

            BranchHooks)

class TestPullResult(TestCase):

    def test_pull_result_to_int(self):

        # to support old code, the pull result can be used as an int

        r = PullResult()

        r.old_revno = 10

        r.new_revno = 20

        # this usage of results is not recommended for new code (because it

        # doesn't describe very well what happened), but for api stability

        # it's still supported

        a = "%d revisions pulled" % r

        self.assertEqual(a, "10 revisions pulled")

class _StubLockable(object):

    """Helper for TestRunWithWriteLockedTarget."""

    def __init__(self, calls, unlock_exc=None):

        self.calls = calls

        self.unlock_exc = unlock_exc

    def lock_write(self):

        self.calls.append('lock_write')

    def unlock(self):

        self.calls.append('unlock')

        if self.unlock_exc is not None:

            raise self.unlock_exc

class _ErrorFromCallable(Exception):

    """Helper for TestRunWithWriteLockedTarget."""

class _ErrorFromUnlock(Exception):

    """Helper for TestRunWithWriteLockedTarget."""

class TestRunWithWriteLockedTarget(TestCase):

    """Tests for _run_with_write_locked_target."""

    def setUp(self):

        TestCase.setUp(self)

        self._calls = []

    def func_that_returns_ok(self):

        self._calls.append('func called')

        return 'ok'

    def func_that_raises(self):

        self._calls.append('func called')

        raise _ErrorFromCallable()

    def test_success_unlocks(self):

        lockable = _StubLockable(self._calls)

        result = _run_with_write_locked_target(

            lockable, self.func_that_returns_ok)

        self.assertEqual('ok', result)

        self.assertEqual(['lock_write', 'func called', 'unlock'], self._calls)

    def test_exception_unlocks_and_propagates(self):

        lockable = _StubLockable(self._calls)

        self.assertRaises(_ErrorFromCallable,

            _run_with_write_locked_target, lockable, self.func_that_raises)

        self.assertEqual(['lock_write', 'func called', 'unlock'], self._calls)

    def test_callable_succeeds_but_error_during_unlock(self):

        lockable = _StubLockable(self._calls, unlock_exc=_ErrorFromUnlock())

        self.assertRaises(_ErrorFromUnlock,

            _run_with_write_locked_target, lockable, self.func_that_returns_ok)

        self.assertEqual(['lock_write', 'func called', 'unlock'], self._calls)

    def test_error_during_unlock_does_not_mask_original_error(self):

        lockable = _StubLockable(self._calls, unlock_exc=_ErrorFromUnlock())

        self.assertRaises(_ErrorFromCallable,

            _run_with_write_locked_target, lockable, self.func_that_raises)

        self.assertEqual(['lock_write', 'func called', 'unlock'], self._calls)