# Copyright (C) 2004, 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

from cStringIO import StringIO
import os
import socket
import sys
import threading

from bzrlib import (
    bzrdir,
    diff,
    errors,
    inventory,
    merge,
    osutils,
    repository,
    revision as _mod_revision,
    tests,
    treebuilder,
    )
from bzrlib.bundle import read_mergeable_from_url
from bzrlib.bundle.apply_bundle import install_bundle, merge_bundle
from bzrlib.bundle.bundle_data import BundleTree
from bzrlib.bzrdir import BzrDir
from bzrlib.directory_service import directories
from bzrlib.bundle.serializer import write_bundle, read_bundle, v09, v4
from bzrlib.bundle.serializer.v08 import BundleSerializerV08
from bzrlib.bundle.serializer.v09 import BundleSerializerV09
from bzrlib.bundle.serializer.v4 import BundleSerializerV4
from bzrlib.branch import Branch
from bzrlib.repofmt import knitrepo
from bzrlib.tests import (
    test_read_bundle,
    test_commit,
    )
from bzrlib.transform import TreeTransform


def get_text(vf, key):
    """Get the fulltext for a given revision id that is present in the vf"""
    stream = vf.get_record_stream([key], 'unordered', True)
    record = stream.next()
    return record.get_bytes_as('fulltext')


def get_inventory_text(repo, revision_id):
    """Get the fulltext for the inventory at revision id"""
    repo.lock_read()
    try:
        return get_text(repo.inventories, (revision_id,))
    finally:
        repo.unlock()


class MockTree(object):
    def __init__(self):
        from bzrlib.inventory import InventoryDirectory, ROOT_ID
        object.__init__(self)
        self.paths = {ROOT_ID: ""}
        self.ids = {"": ROOT_ID}
        self.contents = {}
        self.root = InventoryDirectory(ROOT_ID, '', None)

    inventory = property(lambda x:x)

    def __iter__(self):
        return self.paths.iterkeys()

    def __getitem__(self, file_id):
        if file_id == self.root.file_id:
            return self.root
        else:
            return self.make_entry(file_id, self.paths[file_id])

    def parent_id(self, file_id):
        parent_dir = os.path.dirname(self.paths[file_id])
        if parent_dir == "":
            return None
        return self.ids[parent_dir]

    def iter_entries(self):
        for path, file_id in self.ids.iteritems():
            yield path, self[file_id]

    def get_file_kind(self, file_id):
        if file_id in self.contents:
            kind = 'file'
        else:
            kind = 'directory'
        return kind

    def make_entry(self, file_id, path):
        from bzrlib.inventory import (InventoryEntry, InventoryFile
                                    , InventoryDirectory, InventoryLink)
        name = os.path.basename(path)
        kind = self.get_file_kind(file_id)
        parent_id = self.parent_id(file_id)
        text_sha_1, text_size = self.contents_stats(file_id)
        if kind == 'directory':
            ie = InventoryDirectory(file_id, name, parent_id)
        elif kind == 'file':
            ie = InventoryFile(file_id, name, parent_id)
        elif kind == 'symlink':
            ie = InventoryLink(file_id, name, parent_id)
        else:
            raise errors.BzrError('unknown kind %r' % kind)
        ie.text_sha1 = text_sha_1
        ie.text_size = text_size
        return ie

    def add_dir(self, file_id, path):
        self.paths[file_id] = path
        self.ids[path] = file_id

    def add_file(self, file_id, path, contents):
        self.add_dir(file_id, path)
        self.contents[file_id] = contents

    def path2id(self, path):
        return self.ids.get(path)

    def id2path(self, file_id):
        return self.paths.get(file_id)

    def has_id(self, file_id):
        return self.id2path(file_id) is not None

    def get_file(self, file_id):
        result = StringIO()
        result.write(self.contents[file_id])
        result.seek(0,0)
        return result

    def contents_stats(self, file_id):
        if file_id not in self.contents:
            return None, None
        text_sha1 = osutils.sha_file(self.get_file(file_id))
        return text_sha1, len(self.contents[file_id])


class BTreeTester(tests.TestCase):
    """A simple unittest tester for the BundleTree class."""

    def make_tree_1(self):
        mtree = MockTree()
        mtree.add_dir("a", "grandparent")
        mtree.add_dir("b", "grandparent/parent")
        mtree.add_file("c", "grandparent/parent/file", "Hello\n")
        mtree.add_dir("d", "grandparent/alt_parent")
        return BundleTree(mtree, ''), mtree

    def test_renames(self):
        """Ensure that file renames have the proper effect on children"""
        btree = self.make_tree_1()[0]
        self.assertEqual(btree.old_path("grandparent"), "grandparent")
        self.assertEqual(btree.old_path("grandparent/parent"),
                         "grandparent/parent")
        self.assertEqual(btree.old_path("grandparent/parent/file"),
                         "grandparent/parent/file")

        self.assertEqual(btree.id2path("a"), "grandparent")
        self.assertEqual(btree.id2path("b"), "grandparent/parent")
        self.assertEqual(btree.id2path("c"), "grandparent/parent/file")

        self.assertEqual(btree.path2id("grandparent"), "a")
        self.assertEqual(btree.path2id("grandparent/parent"), "b")
        self.assertEqual(btree.path2id("grandparent/parent/file"), "c")

        self.assertTrue(btree.path2id("grandparent2") is None)
        self.assertTrue(btree.path2id("grandparent2/parent") is None)
        self.assertTrue(btree.path2id("grandparent2/parent/file") is None)

        btree.note_rename("grandparent", "grandparent2")
        self.assertTrue(btree.old_path("grandparent") is None)
        self.assertTrue(btree.old_path("grandparent/parent") is None)
        self.assertTrue(btree.old_path("grandparent/parent/file") is None)

        self.assertEqual(btree.id2path("a"), "grandparent2")
        self.assertEqual(btree.id2path("b"), "grandparent2/parent")
        self.assertEqual(btree.id2path("c"), "grandparent2/parent/file")

        self.assertEqual(btree.path2id("grandparent2"), "a")
        self.assertEqual(btree.path2id("grandparent2/parent"), "b")
        self.assertEqual(btree.path2id("grandparent2/parent/file"), "c")

        self.assertTrue(btree.path2id("grandparent") is None)
        self.assertTrue(btree.path2id("grandparent/parent") is None)
        self.assertTrue(btree.path2id("grandparent/parent/file") is None)

        btree.note_rename("grandparent/parent", "grandparent2/parent2")
        self.assertEqual(btree.id2path("a"), "grandparent2")
        self.assertEqual(btree.id2path("b"), "grandparent2/parent2")
        self.assertEqual(btree.id2path("c"), "grandparent2/parent2/file")

        self.assertEqual(btree.path2id("grandparent2"), "a")
        self.assertEqual(btree.path2id("grandparent2/parent2"), "b")
        self.assertEqual(btree.path2id("grandparent2/parent2/file"), "c")

        self.assertTrue(btree.path2id("grandparent2/parent") is None)
        self.assertTrue(btree.path2id("grandparent2/parent/file") is None)

        btree.note_rename("grandparent/parent/file",
                          "grandparent2/parent2/file2")
        self.assertEqual(btree.id2path("a"), "grandparent2")
        self.assertEqual(btree.id2path("b"), "grandparent2/parent2")
        self.assertEqual(btree.id2path("c"), "grandparent2/parent2/file2")

        self.assertEqual(btree.path2id("grandparent2"), "a")
        self.assertEqual(btree.path2id("grandparent2/parent2"), "b")
        self.assertEqual(btree.path2id("grandparent2/parent2/file2"), "c")

        self.assertTrue(btree.path2id("grandparent2/parent2/file") is None)

    def test_moves(self):
        """Ensure that file moves have the proper effect on children"""
        btree = self.make_tree_1()[0]
        btree.note_rename("grandparent/parent/file",
                          "grandparent/alt_parent/file")
        self.assertEqual(btree.id2path("c"), "grandparent/alt_parent/file")
        self.assertEqual(btree.path2id("grandparent/alt_parent/file"), "c")
        self.assertTrue(btree.path2id("grandparent/parent/file") is None)

    def unified_diff(self, old, new):
        out = StringIO()
        diff.internal_diff("old", old, "new", new, out)
        out.seek(0,0)
        return out.read()

    def make_tree_2(self):
        btree = self.make_tree_1()[0]
        btree.note_rename("grandparent/parent/file",
                          "grandparent/alt_parent/file")
        self.assertTrue(btree.id2path("e") is None)
        self.assertTrue(btree.path2id("grandparent/parent/file") is None)
        btree.note_id("e", "grandparent/parent/file")
        return btree

    def test_adds(self):
        """File/inventory adds"""
        btree = self.make_tree_2()
        add_patch = self.unified_diff([], ["Extra cheese\n"])
        btree.note_patch("grandparent/parent/file", add_patch)
        btree.note_id('f', 'grandparent/parent/symlink', kind='symlink')
        btree.note_target('grandparent/parent/symlink', 'venus')
        self.adds_test(btree)

    def adds_test(self, btree):
        self.assertEqual(btree.id2path("e"), "grandparent/parent/file")
        self.assertEqual(btree.path2id("grandparent/parent/file"), "e")
        self.assertEqual(btree.get_file("e").read(), "Extra cheese\n")
        self.assertEqual(btree.get_symlink_target('f'), 'venus')

    def test_adds2(self):
        """File/inventory adds, with patch-compatibile renames"""
        btree = self.make_tree_2()
        btree.contents_by_id = False
        add_patch = self.unified_diff(["Hello\n"], ["Extra cheese\n"])
        btree.note_patch("grandparent/parent/file", add_patch)
        btree.note_id('f', 'grandparent/parent/symlink', kind='symlink')
        btree.note_target('grandparent/parent/symlink', 'venus')
        self.adds_test(btree)

    def make_tree_3(self):
        btree, mtree = self.make_tree_1()
        mtree.add_file("e", "grandparent/parent/topping", "Anchovies\n")
        btree.note_rename("grandparent/parent/file",
                          "grandparent/alt_parent/file")
        btree.note_rename("grandparent/parent/topping",
                          "grandparent/alt_parent/stopping")
        return btree

    def get_file_test(self, btree):
        self.assertEqual(btree.get_file("e").read(), "Lemon\n")
        self.assertEqual(btree.get_file("c").read(), "Hello\n")

    def test_get_file(self):
        """Get file contents"""
        btree = self.make_tree_3()
        mod_patch = self.unified_diff(["Anchovies\n"], ["Lemon\n"])
        btree.note_patch("grandparent/alt_parent/stopping", mod_patch)
        self.get_file_test(btree)

    def test_get_file2(self):
        """Get file contents, with patch-compatibile renames"""
        btree = self.make_tree_3()
        btree.contents_by_id = False
        mod_patch = self.unified_diff([], ["Lemon\n"])
        btree.note_patch("grandparent/alt_parent/stopping", mod_patch)
        mod_patch = self.unified_diff([], ["Hello\n"])
        btree.note_patch("grandparent/alt_parent/file", mod_patch)
        self.get_file_test(btree)

    def test_delete(self):
        "Deletion by bundle"
        btree = self.make_tree_1()[0]
        self.assertEqual(btree.get_file("c").read(), "Hello\n")
        btree.note_deletion("grandparent/parent/file")
        self.assertTrue(btree.id2path("c") is None)
        self.assertTrue(btree.path2id("grandparent/parent/file") is None)

    def sorted_ids(self, tree):
        ids = list(tree)
        ids.sort()
        return ids

    def test_iteration(self):
        """Ensure that iteration through ids works properly"""
        btree = self.make_tree_1()[0]
        self.assertEqual(self.sorted_ids(btree),
            [inventory.ROOT_ID, 'a', 'b', 'c', 'd'])
        btree.note_deletion("grandparent/parent/file")
        btree.note_id("e", "grandparent/alt_parent/fool", kind="directory")
        btree.note_last_changed("grandparent/alt_parent/fool",
                                "revisionidiguess")
        self.assertEqual(self.sorted_ids(btree),
            [inventory.ROOT_ID, 'a', 'b', 'd', 'e'])


class BundleTester1(tests.TestCaseWithTransport):

    def test_mismatched_bundle(self):
        format = bzrdir.BzrDirMetaFormat1()
        format.repository_format = knitrepo.RepositoryFormatKnit3()
        serializer = BundleSerializerV08('0.8')
        b = self.make_branch('.', format=format)
        self.assertRaises(errors.IncompatibleBundleFormat, serializer.write,
                          b.repository, [], {}, StringIO())

    def test_matched_bundle(self):
        """Don't raise IncompatibleBundleFormat for knit2 and bundle0.9"""
        format = bzrdir.BzrDirMetaFormat1()
        format.repository_format = knitrepo.RepositoryFormatKnit3()
        serializer = BundleSerializerV09('0.9')
        b = self.make_branch('.', format=format)
        serializer.write(b.repository, [], {}, StringIO())

    def test_mismatched_model(self):
        """Try copying a bundle from knit2 to knit1"""
        format = bzrdir.BzrDirMetaFormat1()
        format.repository_format = knitrepo.RepositoryFormatKnit3()
        source = self.make_branch_and_tree('source', format=format)
        source.commit('one', rev_id='one-id')
        source.commit('two', rev_id='two-id')
        text = StringIO()
        write_bundle(source.branch.repository, 'two-id', 'null:', text,
                     format='0.9')
        text.seek(0)

        format = bzrdir.BzrDirMetaFormat1()
        format.repository_format = knitrepo.RepositoryFormatKnit1()
        target = self.make_branch('target', format=format)
        self.assertRaises(errors.IncompatibleRevision, install_bundle,
                          target.repository, read_bundle(text))


class BundleTester(object):

    def bzrdir_format(self):
        format = bzrdir.BzrDirMetaFormat1()
        format.repository_format = knitrepo.RepositoryFormatKnit1()
        return format

    def make_branch_and_tree(self, path, format=None):
        if format is None:
            format = self.bzrdir_format()
        return tests.TestCaseWithTransport.make_branch_and_tree(
            self, path, format)

    def make_branch(self, path, format=None):
        if format is None:
            format = self.bzrdir_format()
        return tests.TestCaseWithTransport.make_branch(self, path, format)

    def create_bundle_text(self, base_rev_id, rev_id):
        bundle_txt = StringIO()
        rev_ids = write_bundle(self.b1.repository, rev_id, base_rev_id,
                               bundle_txt, format=self.format)
        bundle_txt.seek(0)
        self.assertEqual(bundle_txt.readline(),
                         '# Bazaar revision bundle v%s\n' % self.format)
        self.assertEqual(bundle_txt.readline(), '#\n')

        rev = self.b1.repository.get_revision(rev_id)
        self.assertEqual(bundle_txt.readline().decode('utf-8'),
                         u'# message:\n')
        bundle_txt.seek(0)
        return bundle_txt, rev_ids

    def get_valid_bundle(self, base_rev_id, rev_id, checkout_dir=None):
        """Create a bundle from base_rev_id -> rev_id in built-in branch.
        Make sure that the text generated is valid, and that it
        can be applied against the base, and generate the same information.

        :return: The in-memory bundle
        """
        bundle_txt, rev_ids = self.create_bundle_text(base_rev_id, rev_id)

        # This should also validate the generated bundle
        bundle = read_bundle(bundle_txt)
        repository = self.b1.repository
        for bundle_rev in bundle.real_revisions:
            # These really should have already been checked when we read the
            # bundle, since it computes the sha1 hash for the revision, which
            # only will match if everything is okay, but lets be explicit about
            # it
            branch_rev = repository.get_revision(bundle_rev.revision_id)
            for a in ('inventory_sha1', 'revision_id', 'parent_ids',
                      'timestamp', 'timezone', 'message', 'committer',
                      'parent_ids', 'properties'):
                self.assertEqual(getattr(branch_rev, a),
                                 getattr(bundle_rev, a))
            self.assertEqual(len(branch_rev.parent_ids),
                             len(bundle_rev.parent_ids))
        self.assertEqual(rev_ids,
                         [r.revision_id for r in bundle.real_revisions])
        self.valid_apply_bundle(base_rev_id, bundle,
                                   checkout_dir=checkout_dir)

        return bundle

    def get_invalid_bundle(self, base_rev_id, rev_id):
        """Create a bundle from base_rev_id -> rev_id in built-in branch.
        Munge the text so that it's invalid.

        :return: The in-memory bundle
        """
        bundle_txt, rev_ids = self.create_bundle_text(base_rev_id, rev_id)
        new_text = bundle_txt.getvalue().replace('executable:no',
                                               'executable:yes')
        bundle_txt = StringIO(new_text)
        bundle = read_bundle(bundle_txt)
        self.valid_apply_bundle(base_rev_id, bundle)
        return bundle

    def test_non_bundle(self):
        self.assertRaises(errors.NotABundle,
                          read_bundle, StringIO('#!/bin/sh\n'))

    def test_malformed(self):
        self.assertRaises(errors.BadBundle, read_bundle,
                          StringIO('# Bazaar revision bundle v'))

    def test_crlf_bundle(self):
        try:
            read_bundle(StringIO('# Bazaar revision bundle v0.8\r\n'))
        except errors.BadBundle:
            # It is currently permitted for bundles with crlf line endings to
            # make read_bundle raise a BadBundle, but this should be fixed.
            # Anything else, especially NotABundle, is an error.
            pass

    def get_checkout(self, rev_id, checkout_dir=None):
        """Get a new tree, with the specified revision in it.
        """

        if checkout_dir is None:
            checkout_dir = osutils.mkdtemp(prefix='test-branch-', dir='.')
        else:
            if not os.path.exists(checkout_dir):
                os.mkdir(checkout_dir)
        tree = self.make_branch_and_tree(checkout_dir)
        s = StringIO()
        ancestors = write_bundle(self.b1.repository, rev_id, 'null:', s,
                                 format=self.format)
        s.seek(0)
        self.assertIsInstance(s.getvalue(), str)
        install_bundle(tree.branch.repository, read_bundle(s))
        for ancestor in ancestors:
            old = self.b1.repository.revision_tree(ancestor)
            new = tree.branch.repository.revision_tree(ancestor)
            old.lock_read()
            new.lock_read()
            try:
                # Check that there aren't any inventory level changes
                delta = new.changes_from(old)
                self.assertFalse(delta.has_changed(),
                                 'Revision %s not copied correctly.'
                                 % (ancestor,))

                # Now check that the file contents are all correct
                for inventory_id in old:
                    try:
                        old_file = old.get_file(inventory_id)
                    except errors.NoSuchFile:
                        continue
                    if old_file is None:
                        continue
                    self.assertEqual(old_file.read(),
                                     new.get_file(inventory_id).read())
            finally:
                new.unlock()
                old.unlock()
        if not _mod_revision.is_null(rev_id):
            rh = self.b1.revision_history()
            tree.branch.set_revision_history(rh[:rh.index(rev_id)+1])
            tree.update()
            delta = tree.changes_from(self.b1.repository.revision_tree(rev_id))
            self.assertFalse(delta.has_changed(),
                             'Working tree has modifications: %s' % delta)
        return tree

    def valid_apply_bundle(self, base_rev_id, info, checkout_dir=None):
        """Get the base revision, apply the changes, and make
        sure everything matches the builtin branch.
        """
        to_tree = self.get_checkout(base_rev_id, checkout_dir=checkout_dir)
        to_tree.lock_write()
        try:
            self._valid_apply_bundle(base_rev_id, info, to_tree)
        finally:
            to_tree.unlock()

    def _valid_apply_bundle(self, base_rev_id, info, to_tree):
        original_parents = to_tree.get_parent_ids()
        repository = to_tree.branch.repository
        original_parents = to_tree.get_parent_ids()
        self.assertIs(repository.has_revision(base_rev_id), True)
        for rev in info.real_revisions:
            self.assert_(not repository.has_revision(rev.revision_id),
                'Revision {%s} present before applying bundle'
                % rev.revision_id)
        merge_bundle(info, to_tree, True, merge.Merge3Merger, False, False)

        for rev in info.real_revisions:
            self.assert_(repository.has_revision(rev.revision_id),
                'Missing revision {%s} after applying bundle'
                % rev.revision_id)

        self.assert_(to_tree.branch.repository.has_revision(info.target))
        # Do we also want to verify that all the texts have been added?

        self.assertEqual(original_parents + [info.target],
            to_tree.get_parent_ids())

        rev = info.real_revisions[-1]
        base_tree = self.b1.repository.revision_tree(rev.revision_id)
        to_tree = to_tree.branch.repository.revision_tree(rev.revision_id)

        # TODO: make sure the target tree is identical to base tree
        #       we might also check the working tree.

        base_files = list(base_tree.list_files())
        to_files = list(to_tree.list_files())
        self.assertEqual(len(base_files), len(to_files))
        for base_file, to_file in zip(base_files, to_files):
            self.assertEqual(base_file, to_file)

        for path, status, kind, fileid, entry in base_files:
            # Check that the meta information is the same
            self.assertEqual(base_tree.get_file_size(fileid),
                    to_tree.get_file_size(fileid))
            self.assertEqual(base_tree.get_file_sha1(fileid),
                    to_tree.get_file_sha1(fileid))
            # Check that the contents are the same
            # This is pretty expensive
            # self.assertEqual(base_tree.get_file(fileid).read(),
            #         to_tree.get_file(fileid).read())

    def test_bundle(self):
        self.tree1 = self.make_branch_and_tree('b1')
        self.b1 = self.tree1.branch

        self.build_tree_contents([('b1/one', 'one\n')])
        self.tree1.add('one', 'one-id')
        self.tree1.set_root_id('root-id')
        self.tree1.commit('add one', rev_id='a@cset-0-1')

        bundle = self.get_valid_bundle('null:', 'a@cset-0-1')

        # Make sure we can handle files with spaces, tabs, other
        # bogus characters
        self.build_tree([
                'b1/with space.txt'
                , 'b1/dir/'
                , 'b1/dir/filein subdir.c'
                , 'b1/dir/WithCaps.txt'
                , 'b1/dir/ pre space'
                , 'b1/sub/'
                , 'b1/sub/sub/'
                , 'b1/sub/sub/nonempty.txt'
                ])
        self.build_tree_contents([('b1/sub/sub/emptyfile.txt', ''),
                                  ('b1/dir/nolastnewline.txt', 'bloop')])
        tt = TreeTransform(self.tree1)
        tt.new_file('executable', tt.root, '#!/bin/sh\n', 'exe-1', True)
        tt.apply()
        # have to fix length of file-id so that we can predictably rewrite
        # a (length-prefixed) record containing it later.
        self.tree1.add('with space.txt', 'withspace-id')
        self.tree1.add([
                  'dir'
                , 'dir/filein subdir.c'
                , 'dir/WithCaps.txt'
                , 'dir/ pre space'
                , 'dir/nolastnewline.txt'
                , 'sub'
                , 'sub/sub'
                , 'sub/sub/nonempty.txt'
                , 'sub/sub/emptyfile.txt'
                ])
        self.tree1.commit('add whitespace', rev_id='a@cset-0-2')

        bundle = self.get_valid_bundle('a@cset-0-1', 'a@cset-0-2')

        # Check a rollup bundle
        bundle = self.get_valid_bundle('null:', 'a@cset-0-2')

        # Now delete entries
        self.tree1.remove(
                ['sub/sub/nonempty.txt'
                , 'sub/sub/emptyfile.txt'
                , 'sub/sub'
                ])
        tt = TreeTransform(self.tree1)
        trans_id = tt.trans_id_tree_file_id('exe-1')
        tt.set_executability(False, trans_id)
        tt.apply()
        self.tree1.commit('removed', rev_id='a@cset-0-3')

        bundle = self.get_valid_bundle('a@cset-0-2', 'a@cset-0-3')
        self.assertRaises((errors.TestamentMismatch,
            errors.VersionedFileInvalidChecksum,
            errors.BadBundle), self.get_invalid_bundle,
            'a@cset-0-2', 'a@cset-0-3')
        # Check a rollup bundle
        bundle = self.get_valid_bundle('null:', 'a@cset-0-3')

        # Now move the directory
        self.tree1.rename_one('dir', 'sub/dir')
        self.tree1.commit('rename dir', rev_id='a@cset-0-4')

        bundle = self.get_valid_bundle('a@cset-0-3', 'a@cset-0-4')
        # Check a rollup bundle
        bundle = self.get_valid_bundle('null:', 'a@cset-0-4')

        # Modified files
        open('b1/sub/dir/WithCaps.txt', 'ab').write('\nAdding some text\n')
        open('b1/sub/dir/ pre space', 'ab').write(
             '\r\nAdding some\r\nDOS format lines\r\n')
        open('b1/sub/dir/nolastnewline.txt', 'ab').write('\n')
        self.tree1.rename_one('sub/dir/ pre space',
                              'sub/ start space')
        self.tree1.commit('Modified files', rev_id='a@cset-0-5')
        bundle = self.get_valid_bundle('a@cset-0-4', 'a@cset-0-5')

        self.tree1.rename_one('sub/dir/WithCaps.txt', 'temp')
        self.tree1.rename_one('with space.txt', 'WithCaps.txt')
        self.tree1.rename_one('temp', 'with space.txt')
        self.tree1.commit(u'swap filenames', rev_id='a@cset-0-6',
                          verbose=False)
        bundle = self.get_valid_bundle('a@cset-0-5', 'a@cset-0-6')
        other = self.get_checkout('a@cset-0-5')
        tree1_inv = get_inventory_text(self.tree1.branch.repository,
                                       'a@cset-0-5')
        tree2_inv = get_inventory_text(other.branch.repository,
                                       'a@cset-0-5')
        self.assertEqualDiff(tree1_inv, tree2_inv)
        other.rename_one('sub/dir/nolastnewline.txt', 'sub/nolastnewline.txt')
        other.commit('rename file', rev_id='a@cset-0-6b')
        self.tree1.merge_from_branch(other.branch)
        self.tree1.commit(u'Merge', rev_id='a@cset-0-7',
                          verbose=False)
        bundle = self.get_valid_bundle('a@cset-0-6', 'a@cset-0-7')

    def _test_symlink_bundle(self, link_name, link_target, new_link_target):
        link_id = 'link-1'

        self.requireFeature(tests.SymlinkFeature)
        self.tree1 = self.make_branch_and_tree('b1')
        self.b1 = self.tree1.branch

        tt = TreeTransform(self.tree1)
        tt.new_symlink(link_name, tt.root, link_target, link_id)
        tt.apply()
        self.tree1.commit('add symlink', rev_id='l@cset-0-1')
        bundle = self.get_valid_bundle('null:', 'l@cset-0-1')
        if getattr(bundle ,'revision_tree', None) is not None:
            # Not all bundle formats supports revision_tree
            bund_tree = bundle.revision_tree(self.b1.repository, 'l@cset-0-1')
            self.assertEqual(link_target, bund_tree.get_symlink_target(link_id))

        tt = TreeTransform(self.tree1)
        trans_id = tt.trans_id_tree_file_id(link_id)
        tt.adjust_path('link2', tt.root, trans_id)
        tt.delete_contents(trans_id)
        tt.create_symlink(new_link_target, trans_id)
        tt.apply()
        self.tree1.commit('rename and change symlink', rev_id='l@cset-0-2')
        bundle = self.get_valid_bundle('l@cset-0-1', 'l@cset-0-2')
        if getattr(bundle ,'revision_tree', None) is not None:
            # Not all bundle formats supports revision_tree
            bund_tree = bundle.revision_tree(self.b1.repository, 'l@cset-0-2')
            self.assertEqual(new_link_target,
                             bund_tree.get_symlink_target(link_id))

        tt = TreeTransform(self.tree1)
        trans_id = tt.trans_id_tree_file_id(link_id)
        tt.delete_contents(trans_id)
        tt.create_symlink('jupiter', trans_id)
        tt.apply()
        self.tree1.commit('just change symlink target', rev_id='l@cset-0-3')
        bundle = self.get_valid_bundle('l@cset-0-2', 'l@cset-0-3')

        tt = TreeTransform(self.tree1)
        trans_id = tt.trans_id_tree_file_id(link_id)
        tt.delete_contents(trans_id)
        tt.apply()
        self.tree1.commit('Delete symlink', rev_id='l@cset-0-4')
        bundle = self.get_valid_bundle('l@cset-0-3', 'l@cset-0-4')

    def test_symlink_bundle(self):
        self._test_symlink_bundle('link', 'bar/foo', 'mars')

    def test_unicode_symlink_bundle(self):
        self.requireFeature(tests.UnicodeFilenameFeature)
        self._test_symlink_bundle(u'\N{Euro Sign}link',
                                  u'bar/\N{Euro Sign}foo',
                                  u'mars\N{Euro Sign}')

    def test_binary_bundle(self):
        self.tree1 = self.make_branch_and_tree('b1')
        self.b1 = self.tree1.branch
        tt = TreeTransform(self.tree1)

        # Add
        tt.new_file('file', tt.root, '\x00\n\x00\r\x01\n\x02\r\xff', 'binary-1')
        tt.new_file('file2', tt.root, '\x01\n\x02\r\x03\n\x04\r\xff',
            'binary-2')
        tt.apply()
        self.tree1.commit('add binary', rev_id='b@cset-0-1')
        self.get_valid_bundle('null:', 'b@cset-0-1')

        # Delete
        tt = TreeTransform(self.tree1)
        trans_id = tt.trans_id_tree_file_id('binary-1')
        tt.delete_contents(trans_id)
        tt.apply()
        self.tree1.commit('delete binary', rev_id='b@cset-0-2')
        self.get_valid_bundle('b@cset-0-1', 'b@cset-0-2')

        # Rename & modify
        tt = TreeTransform(self.tree1)
        trans_id = tt.trans_id_tree_file_id('binary-2')
        tt.adjust_path('file3', tt.root, trans_id)
        tt.delete_contents(trans_id)
        tt.create_file('file\rcontents\x00\n\x00', trans_id)
        tt.apply()
        self.tree1.commit('rename and modify binary', rev_id='b@cset-0-3')
        self.get_valid_bundle('b@cset-0-2', 'b@cset-0-3')

        # Modify
        tt = TreeTransform(self.tree1)
        trans_id = tt.trans_id_tree_file_id('binary-2')
        tt.delete_contents(trans_id)
        tt.create_file('\x00file\rcontents', trans_id)
        tt.apply()
        self.tree1.commit('just modify binary', rev_id='b@cset-0-4')
        self.get_valid_bundle('b@cset-0-3', 'b@cset-0-4')

        # Rollup
        self.get_valid_bundle('null:', 'b@cset-0-4')

    def test_last_modified(self):
        self.tree1 = self.make_branch_and_tree('b1')
        self.b1 = self.tree1.branch
        tt = TreeTransform(self.tree1)
        tt.new_file('file', tt.root, 'file', 'file')
        tt.apply()
        self.tree1.commit('create file', rev_id='a@lmod-0-1')

        tt = TreeTransform(self.tree1)
        trans_id = tt.trans_id_tree_file_id('file')
        tt.delete_contents(trans_id)
        tt.create_file('file2', trans_id)
        tt.apply()
        self.tree1.commit('modify text', rev_id='a@lmod-0-2a')

        other = self.get_checkout('a@lmod-0-1')
        tt = TreeTransform(other)
        trans_id = tt.trans_id_tree_file_id('file')
        tt.delete_contents(trans_id)
        tt.create_file('file2', trans_id)
        tt.apply()
        other.commit('modify text in another tree', rev_id='a@lmod-0-2b')
        self.tree1.merge_from_branch(other.branch)
        self.tree1.commit(u'Merge', rev_id='a@lmod-0-3',
                          verbose=False)
        self.tree1.commit(u'Merge', rev_id='a@lmod-0-4')
        bundle = self.get_valid_bundle('a@lmod-0-2a', 'a@lmod-0-4')

    def test_hide_history(self):
        self.tree1 = self.make_branch_and_tree('b1')
        self.b1 = self.tree1.branch

        open('b1/one', 'wb').write('one\n')
        self.tree1.add('one')
        self.tree1.commit('add file', rev_id='a@cset-0-1')
        open('b1/one', 'wb').write('two\n')
        self.tree1.commit('modify', rev_id='a@cset-0-2')
        open('b1/one', 'wb').write('three\n')
        self.tree1.commit('modify', rev_id='a@cset-0-3')
        bundle_file = StringIO()
        rev_ids = write_bundle(self.tree1.branch.repository, 'a@cset-0-3',
                               'a@cset-0-1', bundle_file, format=self.format)
        self.assertNotContainsRe(bundle_file.getvalue(), '\btwo\b')
        self.assertContainsRe(self.get_raw(bundle_file), 'one')
        self.assertContainsRe(self.get_raw(bundle_file), 'three')

    def test_bundle_same_basis(self):
        """Ensure using the basis as the target doesn't cause an error"""
        self.tree1 = self.make_branch_and_tree('b1')
        self.tree1.commit('add file', rev_id='a@cset-0-1')
        bundle_file = StringIO()
        rev_ids = write_bundle(self.tree1.branch.repository, 'a@cset-0-1',
                               'a@cset-0-1', bundle_file)

    @staticmethod
    def get_raw(bundle_file):
        return bundle_file.getvalue()

    def test_unicode_bundle(self):
        self.requireFeature(tests.UnicodeFilenameFeature)
        # Handle international characters
        os.mkdir('b1')
        f = open(u'b1/with Dod\N{Euro Sign}', 'wb')

        self.tree1 = self.make_branch_and_tree('b1')
        self.b1 = self.tree1.branch

        f.write((u'A file\n'
            u'With international man of mystery\n'
            u'William Dod\xe9\n').encode('utf-8'))
        f.close()

        self.tree1.add([u'with Dod\N{Euro Sign}'], ['withdod-id'])
        self.tree1.commit(u'i18n commit from William Dod\xe9',
                          rev_id='i18n-1', committer=u'William Dod\xe9')

        # Add
        bundle = self.get_valid_bundle('null:', 'i18n-1')

        # Modified
        f = open(u'b1/with Dod\N{Euro Sign}', 'wb')
        f.write(u'Modified \xb5\n'.encode('utf8'))
        f.close()
        self.tree1.commit(u'modified', rev_id='i18n-2')

        bundle = self.get_valid_bundle('i18n-1', 'i18n-2')

        # Renamed
        self.tree1.rename_one(u'with Dod\N{Euro Sign}', u'B\N{Euro Sign}gfors')
        self.tree1.commit(u'renamed, the new i18n man', rev_id='i18n-3',
                          committer=u'Erik B\xe5gfors')

        bundle = self.get_valid_bundle('i18n-2', 'i18n-3')

        # Removed
        self.tree1.remove([u'B\N{Euro Sign}gfors'])
        self.tree1.commit(u'removed', rev_id='i18n-4')

        bundle = self.get_valid_bundle('i18n-3', 'i18n-4')

        # Rollup
        bundle = self.get_valid_bundle('null:', 'i18n-4')


    def test_whitespace_bundle(self):
        if sys.platform in ('win32', 'cygwin'):
            raise tests.TestSkipped('Windows doesn\'t support filenames'
                                    ' with tabs or trailing spaces')
        self.tree1 = self.make_branch_and_tree('b1')
        self.b1 = self.tree1.branch

        self.build_tree(['b1/trailing space '])
        self.tree1.add(['trailing space '])
        # TODO: jam 20060701 Check for handling files with '\t' characters
        #       once we actually support them

        # Added
        self.tree1.commit('funky whitespace', rev_id='white-1')

        bundle = self.get_valid_bundle('null:', 'white-1')

        # Modified
        open('b1/trailing space ', 'ab').write('add some text\n')
        self.tree1.commit('add text', rev_id='white-2')

        bundle = self.get_valid_bundle('white-1', 'white-2')

        # Renamed
        self.tree1.rename_one('trailing space ', ' start and end space ')
        self.tree1.commit('rename', rev_id='white-3')

        bundle = self.get_valid_bundle('white-2', 'white-3')

        # Removed
        self.tree1.remove([' start and end space '])
        self.tree1.commit('removed', rev_id='white-4')

        bundle = self.get_valid_bundle('white-3', 'white-4')

        # Now test a complet roll-up
        bundle = self.get_valid_bundle('null:', 'white-4')

    def test_alt_timezone_bundle(self):
        self.tree1 = self.make_branch_and_memory_tree('b1')
        self.b1 = self.tree1.branch
        builder = treebuilder.TreeBuilder()

        self.tree1.lock_write()
        builder.start_tree(self.tree1)
        builder.build(['newfile'])
        builder.finish_tree()

        # Asia/Colombo offset = 5 hours 30 minutes
        self.tree1.commit('non-hour offset timezone', rev_id='tz-1',
                          timezone=19800, timestamp=1152544886.0)

        bundle = self.get_valid_bundle('null:', 'tz-1')

        rev = bundle.revisions[0]
        self.assertEqual('Mon 2006-07-10 20:51:26.000000000 +0530', rev.date)
        self.assertEqual(19800, rev.timezone)
        self.assertEqual(1152544886.0, rev.timestamp)
        self.tree1.unlock()

    def test_bundle_root_id(self):
        self.tree1 = self.make_branch_and_tree('b1')
        self.b1 = self.tree1.branch
        self.tree1.commit('message', rev_id='revid1')
        bundle = self.get_valid_bundle('null:', 'revid1')
        tree = self.get_bundle_tree(bundle, 'revid1')
        self.assertEqual('revid1', tree.inventory.root.revision)

    def test_install_revisions(self):
        self.tree1 = self.make_branch_and_tree('b1')
        self.b1 = self.tree1.branch
        self.tree1.commit('message', rev_id='rev2a')
        bundle = self.get_valid_bundle('null:', 'rev2a')
        branch2 = self.make_branch('b2')
        self.assertFalse(branch2.repository.has_revision('rev2a'))
        target_revision = bundle.install_revisions(branch2.repository)
        self.assertTrue(branch2.repository.has_revision('rev2a'))
        self.assertEqual('rev2a', target_revision)

    def test_bundle_empty_property(self):
        """Test serializing revision properties with an empty value."""
        tree = self.make_branch_and_memory_tree('tree')
        tree.lock_write()
        self.addCleanup(tree.unlock)
        tree.add([''], ['TREE_ROOT'])
        tree.commit('One', revprops={'one':'two', 'empty':''}, rev_id='rev1')
        self.b1 = tree.branch
        bundle_sio, revision_ids = self.create_bundle_text('null:', 'rev1')
        bundle = read_bundle(bundle_sio)
        revision_info = bundle.revisions[0]
        self.assertEqual('rev1', revision_info.revision_id)
        rev = revision_info.as_revision()
        self.assertEqual({'branch-nick':'tree', 'empty':'', 'one':'two'},
                         rev.properties)

    def test_bundle_sorted_properties(self):
        """For stability the writer should write properties in sorted order."""
        tree = self.make_branch_and_memory_tree('tree')
        tree.lock_write()
        self.addCleanup(tree.unlock)

        tree.add([''], ['TREE_ROOT'])
        tree.commit('One', rev_id='rev1',
                    revprops={'a':'4', 'b':'3', 'c':'2', 'd':'1'})
        self.b1 = tree.branch
        bundle_sio, revision_ids = self.create_bundle_text('null:', 'rev1')
        bundle = read_bundle(bundle_sio)
        revision_info = bundle.revisions[0]
        self.assertEqual('rev1', revision_info.revision_id)
        rev = revision_info.as_revision()
        self.assertEqual({'branch-nick':'tree', 'a':'4', 'b':'3', 'c':'2',
                          'd':'1'}, rev.properties)

    def test_bundle_unicode_properties(self):
        """We should be able to round trip a non-ascii property."""
        tree = self.make_branch_and_memory_tree('tree')
        tree.lock_write()
        self.addCleanup(tree.unlock)

        tree.add([''], ['TREE_ROOT'])
        # Revisions themselves do not require anything about revision property
        # keys, other than that they are a basestring, and do not contain
        # whitespace.
        # However, Testaments assert than they are str(), and thus should not
        # be Unicode.
        tree.commit('One', rev_id='rev1',
                    revprops={'omega':u'\u03a9', 'alpha':u'\u03b1'})
        self.b1 = tree.branch
        bundle_sio, revision_ids = self.create_bundle_text('null:', 'rev1')
        bundle = read_bundle(bundle_sio)
        revision_info = bundle.revisions[0]
        self.assertEqual('rev1', revision_info.revision_id)
        rev = revision_info.as_revision()
        self.assertEqual({'branch-nick':'tree', 'omega':u'\u03a9',
                          'alpha':u'\u03b1'}, rev.properties)

    def test_bundle_with_ghosts(self):
        tree = self.make_branch_and_tree('tree')
        self.b1 = tree.branch
        self.build_tree_contents([('tree/file', 'content1')])
        tree.add(['file'])
        tree.commit('rev1')
        self.build_tree_contents([('tree/file', 'content2')])
        tree.add_parent_tree_id('ghost')
        tree.commit('rev2', rev_id='rev2')
        bundle = self.get_valid_bundle('null:', 'rev2')

    def make_simple_tree(self, format=None):
        tree = self.make_branch_and_tree('b1', format=format)
        self.b1 = tree.branch
        self.build_tree(['b1/file'])
        tree.add('file')
        return tree

    def test_across_serializers(self):
        tree = self.make_simple_tree('knit')
        tree.commit('hello', rev_id='rev1')
        tree.commit('hello', rev_id='rev2')
        bundle = read_bundle(self.create_bundle_text('null:', 'rev2')[0])
        repo = self.make_repository('repo', format='dirstate-with-subtree')
        bundle.install_revisions(repo)
        inv_text = repo.get_inventory_xml('rev2')
        self.assertNotContainsRe(inv_text, 'format="5"')
        self.assertContainsRe(inv_text, 'format="7"')

    def make_repo_with_installed_revisions(self):
        tree = self.make_simple_tree('knit')
        tree.commit('hello', rev_id='rev1')
        tree.commit('hello', rev_id='rev2')
        bundle = read_bundle(self.create_bundle_text('null:', 'rev2')[0])
        repo = self.make_repository('repo', format='dirstate-with-subtree')
        bundle.install_revisions(repo)
        return repo

    def test_across_models(self):
        repo = self.make_repo_with_installed_revisions()
        inv = repo.get_inventory('rev2')
        self.assertEqual('rev2', inv.root.revision)
        root_id = inv.root.file_id
        repo.lock_read()
        self.addCleanup(repo.unlock)
        self.assertEqual({(root_id, 'rev1'):(),
            (root_id, 'rev2'):((root_id, 'rev1'),)},
            repo.texts.get_parent_map([(root_id, 'rev1'), (root_id, 'rev2')]))

    def test_inv_hash_across_serializers(self):
        repo = self.make_repo_with_installed_revisions()
        recorded_inv_sha1 = repo.get_inventory_sha1('rev2')
        xml = repo.get_inventory_xml('rev2')
        self.assertEqual(osutils.sha_string(xml), recorded_inv_sha1)

    def test_across_models_incompatible(self):
        tree = self.make_simple_tree('dirstate-with-subtree')
        tree.commit('hello', rev_id='rev1')
        tree.commit('hello', rev_id='rev2')
        try:
            bundle = read_bundle(self.create_bundle_text('null:', 'rev1')[0])
        except errors.IncompatibleBundleFormat:
            raise tests.TestSkipped("Format 0.8 doesn't work with knit3")
        repo = self.make_repository('repo', format='knit')
        bundle.install_revisions(repo)

        bundle = read_bundle(self.create_bundle_text('null:', 'rev2')[0])
        self.assertRaises(errors.IncompatibleRevision,
                          bundle.install_revisions, repo)

    def test_get_merge_request(self):
        tree = self.make_simple_tree()
        tree.commit('hello', rev_id='rev1')
        tree.commit('hello', rev_id='rev2')
        bundle = read_bundle(self.create_bundle_text('null:', 'rev1')[0])
        result = bundle.get_merge_request(tree.branch.repository)
        self.assertEqual((None, 'rev1', 'inapplicable'), result)

    def test_with_subtree(self):
        tree = self.make_branch_and_tree('tree',
                                         format='dirstate-with-subtree')
        self.b1 = tree.branch
        subtree = self.make_branch_and_tree('tree/subtree',
                                            format='dirstate-with-subtree')
        tree.add('subtree')
        tree.commit('hello', rev_id='rev1')
        try:
            bundle = read_bundle(self.create_bundle_text('null:', 'rev1')[0])
        except errors.IncompatibleBundleFormat:
            raise tests.TestSkipped("Format 0.8 doesn't work with knit3")
        if isinstance(bundle, v09.BundleInfo09):
            raise tests.TestSkipped("Format 0.9 doesn't work with subtrees")
        repo = self.make_repository('repo', format='knit')
        self.assertRaises(errors.IncompatibleRevision,
                          bundle.install_revisions, repo)
        repo2 = self.make_repository('repo2', format='dirstate-with-subtree')
        bundle.install_revisions(repo2)

    def test_revision_id_with_slash(self):
        self.tree1 = self.make_branch_and_tree('tree')
        self.b1 = self.tree1.branch
        try:
            self.tree1.commit('Revision/id/with/slashes', rev_id='rev/id')
        except ValueError:
            raise tests.TestSkipped(
                "Repository doesn't support revision ids with slashes")
        bundle = self.get_valid_bundle('null:', 'rev/id')

    def test_skip_file(self):
        """Make sure we don't accidentally write to the wrong versionedfile"""
        self.tree1 = self.make_branch_and_tree('tree')
        self.b1 = self.tree1.branch
        # rev1 is not present in bundle, done by fetch
        self.build_tree_contents([('tree/file2', 'contents1')])
        self.tree1.add('file2', 'file2-id')
        self.tree1.commit('rev1', rev_id='reva')
        self.build_tree_contents([('tree/file3', 'contents2')])
        # rev2 is present in bundle, and done by fetch
        # having file1 in the bunle causes file1's versionedfile to be opened.
        self.tree1.add('file3', 'file3-id')
        self.tree1.commit('rev2')
        # Updating file2 should not cause an attempt to add to file1's vf
        target = self.tree1.bzrdir.sprout('target').open_workingtree()
        self.build_tree_contents([('tree/file2', 'contents3')])
        self.tree1.commit('rev3', rev_id='rev3')
        bundle = self.get_valid_bundle('reva', 'rev3')
        if getattr(bundle, 'get_bundle_reader', None) is None:
            raise tests.TestSkipped('Bundle format cannot provide reader')
        # be sure that file1 comes before file2
        for b, m, k, r, f in bundle.get_bundle_reader().iter_records():
            if f == 'file3-id':
                break
            self.assertNotEqual(f, 'file2-id')
        bundle.install_revisions(target.branch.repository)


class V08BundleTester(BundleTester, tests.TestCaseWithTransport):

    format = '0.8'

    def test_bundle_empty_property(self):
        """Test serializing revision properties with an empty value."""
        tree = self.make_branch_and_memory_tree('tree')
        tree.lock_write()
        self.addCleanup(tree.unlock)
        tree.add([''], ['TREE_ROOT'])
        tree.commit('One', revprops={'one':'two', 'empty':''}, rev_id='rev1')
        self.b1 = tree.branch
        bundle_sio, revision_ids = self.create_bundle_text('null:', 'rev1')
        self.assertContainsRe(bundle_sio.getvalue(),
                              '# properties:\n'
                              '#   branch-nick: tree\n'
                              '#   empty: \n'
                              '#   one: two\n'
                             )
        bundle = read_bundle(bundle_sio)
        revision_info = bundle.revisions[0]
        self.assertEqual('rev1', revision_info.revision_id)
        rev = revision_info.as_revision()
        self.assertEqual({'branch-nick':'tree', 'empty':'', 'one':'two'},
                         rev.properties)

    def get_bundle_tree(self, bundle, revision_id):
        repository = self.make_repository('repo')
        return bundle.revision_tree(repository, 'revid1')

    def test_bundle_empty_property_alt(self):
        """Test serializing revision properties with an empty value.

        Older readers had a bug when reading an empty property.
        They assumed that all keys ended in ': \n'. However they would write an
        empty value as ':\n'. This tests make sure that all newer bzr versions
        can handle th second form.
        """
        tree = self.make_branch_and_memory_tree('tree')
        tree.lock_write()
        self.addCleanup(tree.unlock)
        tree.add([''], ['TREE_ROOT'])
        tree.commit('One', revprops={'one':'two', 'empty':''}, rev_id='rev1')
        self.b1 = tree.branch
        bundle_sio, revision_ids = self.create_bundle_text('null:', 'rev1')
        txt = bundle_sio.getvalue()
        loc = txt.find('#   empty: ') + len('#   empty:')
        # Create a new bundle, which strips the trailing space after empty
        bundle_sio = StringIO(txt[:loc] + txt[loc+1:])

        self.assertContainsRe(bundle_sio.getvalue(),
                              '# properties:\n'
                              '#   branch-nick: tree\n'
                              '#   empty:\n'
                              '#   one: two\n'
                             )
        bundle = read_bundle(bundle_sio)
        revision_info = bundle.revisions[0]
        self.assertEqual('rev1', revision_info.revision_id)
        rev = revision_info.as_revision()
        self.assertEqual({'branch-nick':'tree', 'empty':'', 'one':'two'},
                         rev.properties)

    def test_bundle_sorted_properties(self):
        """For stability the writer should write properties in sorted order."""
        tree = self.make_branch_and_memory_tree('tree')
        tree.lock_write()
        self.addCleanup(tree.unlock)

        tree.add([''], ['TREE_ROOT'])
        tree.commit('One', rev_id='rev1',
                    revprops={'a':'4', 'b':'3', 'c':'2', 'd':'1'})
        self.b1 = tree.branch
        bundle_sio, revision_ids = self.create_bundle_text('null:', 'rev1')
        self.assertContainsRe(bundle_sio.getvalue(),
                              '# properties:\n'
                              '#   a: 4\n'
                              '#   b: 3\n'
                              '#   branch-nick: tree\n'
                              '#   c: 2\n'
                              '#   d: 1\n'
                             )
        bundle = read_bundle(bundle_sio)
        revision_info = bundle.revisions[0]
        self.assertEqual('rev1', revision_info.revision_id)
        rev = revision_info.as_revision()
        self.assertEqual({'branch-nick':'tree', 'a':'4', 'b':'3', 'c':'2',
                          'd':'1'}, rev.properties)

    def test_bundle_unicode_properties(self):
        """We should be able to round trip a non-ascii property."""
        tree = self.make_branch_and_memory_tree('tree')
        tree.lock_write()
        self.addCleanup(tree.unlock)

        tree.add([''], ['TREE_ROOT'])
        # Revisions themselves do not require anything about revision property
        # keys, other than that they are a basestring, and do not contain
        # whitespace.
        # However, Testaments assert than they are str(), and thus should not
        # be Unicode.
        tree.commit('One', rev_id='rev1',
                    revprops={'omega':u'\u03a9', 'alpha':u'\u03b1'})
        self.b1 = tree.branch
        bundle_sio, revision_ids = self.create_bundle_text('null:', 'rev1')
        self.assertContainsRe(bundle_sio.getvalue(),
                              '# properties:\n'
                              '#   alpha: \xce\xb1\n'
                              '#   branch-nick: tree\n'
                              '#   omega: \xce\xa9\n'
                             )
        bundle = read_bundle(bundle_sio)
        revision_info = bundle.revisions[0]
        self.assertEqual('rev1', revision_info.revision_id)
        rev = revision_info.as_revision()
        self.assertEqual({'branch-nick':'tree', 'omega':u'\u03a9',
                          'alpha':u'\u03b1'}, rev.properties)


class V09BundleKnit2Tester(V08BundleTester):

    format = '0.9'

    def bzrdir_format(self):
        format = bzrdir.BzrDirMetaFormat1()
        format.repository_format = knitrepo.RepositoryFormatKnit3()
        return format


class V09BundleKnit1Tester(V08BundleTester):

    format = '0.9'

    def bzrdir_format(self):
        format = bzrdir.BzrDirMetaFormat1()
        format.repository_format = knitrepo.RepositoryFormatKnit1()
        return format


class V4BundleTester(BundleTester, tests.TestCaseWithTransport):

    format = '4'

    def get_valid_bundle(self, base_rev_id, rev_id, checkout_dir=None):
        """Create a bundle from base_rev_id -> rev_id in built-in branch.
        Make sure that the text generated is valid, and that it
        can be applied against the base, and generate the same information.

        :return: The in-memory bundle
        """
        bundle_txt, rev_ids = self.create_bundle_text(base_rev_id, rev_id)

        # This should also validate the generated bundle
        bundle = read_bundle(bundle_txt)
        repository = self.b1.repository
        for bundle_rev in bundle.real_revisions:
            # These really should have already been checked when we read the
            # bundle, since it computes the sha1 hash for the revision, which
            # only will match if everything is okay, but lets be explicit about
            # it
            branch_rev = repository.get_revision(bundle_rev.revision_id)
            for a in ('inventory_sha1', 'revision_id', 'parent_ids',
                      'timestamp', 'timezone', 'message', 'committer',
                      'parent_ids', 'properties'):
                self.assertEqual(getattr(branch_rev, a),
                                 getattr(bundle_rev, a))
            self.assertEqual(len(branch_rev.parent_ids),
                             len(bundle_rev.parent_ids))
        self.assertEqual(set(rev_ids),
                         set([r.revision_id for r in bundle.real_revisions]))
        self.valid_apply_bundle(base_rev_id, bundle,
                                   checkout_dir=checkout_dir)

        return bundle

    def get_invalid_bundle(self, base_rev_id, rev_id):
        """Create a bundle from base_rev_id -> rev_id in built-in branch.
        Munge the text so that it's invalid.

        :return: The in-memory bundle
        """
        from bzrlib.bundle import serializer
        bundle_txt, rev_ids = self.create_bundle_text(base_rev_id, rev_id)
        new_text = self.get_raw(StringIO(''.join(bundle_txt)))
        new_text = new_text.replace('<file file_id="exe-1"',
                                    '<file executable="y" file_id="exe-1"')
        new_text = new_text.replace('B260', 'B275')
        bundle_txt = StringIO()
        bundle_txt.write(serializer._get_bundle_header('4'))
        bundle_txt.write('\n')
        bundle_txt.write(new_text.encode('bz2'))
        bundle_txt.seek(0)
        bundle = read_bundle(bundle_txt)
        self.valid_apply_bundle(base_rev_id, bundle)
        return bundle

    def create_bundle_text(self, base_rev_id, rev_id):
        bundle_txt = StringIO()
        rev_ids = write_bundle(self.b1.repository, rev_id, base_rev_id,
                               bundle_txt, format=self.format)
        bundle_txt.seek(0)
        self.assertEqual(bundle_txt.readline(),
                         '# Bazaar revision bundle v%s\n' % self.format)
        self.assertEqual(bundle_txt.readline(), '#\n')
        rev = self.b1.repository.get_revision(rev_id)
        bundle_txt.seek(0)
        return bundle_txt, rev_ids

    def get_bundle_tree(self, bundle, revision_id):
        repository = self.make_repository('repo')
        bundle.install_revisions(repository)
        return repository.revision_tree(revision_id)

    def test_creation(self):
        tree = self.make_branch_and_tree('tree')
        self.build_tree_contents([('tree/file', 'contents1\nstatic\n')])
        tree.add('file', 'fileid-2')
        tree.commit('added file', rev_id='rev1')
        self.build_tree_contents([('tree/file', 'contents2\nstatic\n')])
        tree.commit('changed file', rev_id='rev2')
        s = StringIO()
        serializer = BundleSerializerV4('1.0')
        serializer.write(tree.branch.repository, ['rev1', 'rev2'], {}, s)
        s.seek(0)
        tree2 = self.make_branch_and_tree('target')
        target_repo = tree2.branch.repository
        install_bundle(target_repo, serializer.read(s))
        target_repo.lock_read()
        self.addCleanup(target_repo.unlock)
        # Turn the 'iterators_of_bytes' back into simple strings for comparison
        repo_texts = dict((i, ''.join(content)) for i, content
                          in target_repo.iter_files_bytes(
                                [('fileid-2', 'rev1', '1'),
                                 ('fileid-2', 'rev2', '2')]))
        self.assertEqual({'1':'contents1\nstatic\n',
                          '2':'contents2\nstatic\n'},
                         repo_texts)
        rtree = target_repo.revision_tree('rev2')
        inventory_vf = target_repo.inventories
        # If the inventory store has a graph, it must match the revision graph.
        self.assertSubset(
            [inventory_vf.get_parent_map([('rev2',)])[('rev2',)]],
            [None, (('rev1',),)])
        self.assertEqual('changed file',
                         target_repo.get_revision('rev2').message)

    @staticmethod
    def get_raw(bundle_file):
        bundle_file.seek(0)
        line = bundle_file.readline()
        line = bundle_file.readline()
        lines = bundle_file.readlines()
        return ''.join(lines).decode('bz2')

    def test_copy_signatures(self):
        tree_a = self.make_branch_and_tree('tree_a')
        import bzrlib.gpg
        import bzrlib.commit as commit
        oldstrategy = bzrlib.gpg.GPGStrategy
        branch = tree_a.branch
        repo_a = branch.repository
        tree_a.commit("base", allow_pointless=True, rev_id='A')
        self.failIf(branch.repository.has_signature_for_revision_id('A'))
        try:
            from bzrlib.testament import Testament
            # monkey patch gpg signing mechanism
            bzrlib.gpg.GPGStrategy = bzrlib.gpg.LoopbackGPGStrategy
            new_config = test_commit.MustSignConfig(branch)
            commit.Commit(config=new_config).commit(message="base",
                                                    allow_pointless=True,
                                                    rev_id='B',
                                                    working_tree=tree_a)
            def sign(text):
                return bzrlib.gpg.LoopbackGPGStrategy(None).sign(text)
            self.assertTrue(repo_a.has_signature_for_revision_id('B'))
        finally:
            bzrlib.gpg.GPGStrategy = oldstrategy
        tree_b = self.make_branch_and_tree('tree_b')
        repo_b = tree_b.branch.repository
        s = StringIO()
        serializer = BundleSerializerV4('4')
        serializer.write(tree_a.branch.repository, ['A', 'B'], {}, s)
        s.seek(0)
        install_bundle(repo_b, serializer.read(s))
        self.assertTrue(repo_b.has_signature_for_revision_id('B'))
        self.assertEqual(repo_b.get_signature_text('B'),
                         repo_a.get_signature_text('B'))
        s.seek(0)
        # ensure repeat installs are harmless
        install_bundle(repo_b, serializer.read(s))


class V4WeaveBundleTester(V4BundleTester):

    def bzrdir_format(self):
        return 'metaweave'


class V4_2aBundleTester(V4BundleTester):

    def bzrdir_format(self):
        return '2a'

    def get_invalid_bundle(self, base_rev_id, rev_id):
        """Create a bundle from base_rev_id -> rev_id in built-in branch.
        Munge the text so that it's invalid.

        :return: The in-memory bundle
        """
        from bzrlib.bundle import serializer
        bundle_txt, rev_ids = self.create_bundle_text(base_rev_id, rev_id)
        new_text = self.get_raw(StringIO(''.join(bundle_txt)))
        # We are going to be replacing some text to set the executable bit on a
        # file. Make sure the text replacement actually works correctly.
        self.assertContainsRe(new_text, '(?m)B244\n\ni 1\n<inventory')
        new_text = new_text.replace('<file file_id="exe-1"',
                                    '<file executable="y" file_id="exe-1"')
        new_text = new_text.replace('B244', 'B259')
        bundle_txt = StringIO()
        bundle_txt.write(serializer._get_bundle_header('4'))
        bundle_txt.write('\n')
        bundle_txt.write(new_text.encode('bz2'))
        bundle_txt.seek(0)
        bundle = read_bundle(bundle_txt)
        self.valid_apply_bundle(base_rev_id, bundle)
        return bundle

    def make_merged_branch(self):
        builder = self.make_branch_builder('source')
        builder.start_series()
        builder.build_snapshot('a@cset-0-1', None, [
            ('add', ('', 'root-id', 'directory', None)),
            ('add', ('file', 'file-id', 'file', 'original content\n')),
            ])
        builder.build_snapshot('a@cset-0-2a', ['a@cset-0-1'], [
            ('modify', ('file-id', 'new-content\n')),
            ])
        builder.build_snapshot('a@cset-0-2b', ['a@cset-0-1'], [
            ('add', ('other-file', 'file2-id', 'file', 'file2-content\n')),
            ])
        builder.build_snapshot('a@cset-0-3', ['a@cset-0-2a', 'a@cset-0-2b'], [
            ('add', ('other-file', 'file2-id', 'file', 'file2-content\n')),
            ])
        builder.finish_series()
        self.b1 = builder.get_branch()
        self.b1.lock_read()
        self.addCleanup(self.b1.unlock)

    def make_bundle_just_inventories(self, base_revision_id,
                                     target_revision_id,
                                     revision_ids):
        sio = StringIO()
        writer = v4.BundleWriteOperation(base_revision_id, target_revision_id,
                                         self.b1.repository, sio)
        writer.bundle.begin()
        writer._add_inventory_mpdiffs_from_serializer(revision_ids)
        writer.bundle.end()
        sio.seek(0)
        return sio

    def test_single_inventory_multiple_parents_as_xml(self):
        self.make_merged_branch()
        sio = self.make_bundle_just_inventories('a@cset-0-1', 'a@cset-0-3',
                                                ['a@cset-0-3'])
        reader = v4.BundleReader(sio, stream_input=False)
        records = list(reader.iter_records())
        self.assertEqual(1, len(records))
        (bytes, metadata, repo_kind, revision_id,
         file_id) = records[0]
        self.assertIs(None, file_id)
        self.assertEqual('a@cset-0-3', revision_id)
        self.assertEqual('inventory', repo_kind)
        self.assertEqual({'parents': ['a@cset-0-2a', 'a@cset-0-2b'],
                          'sha1': '09c53b0c4de0895e11a2aacc34fef60a6e70865c',
                          'storage_kind': 'mpdiff',
                         }, metadata)
        # We should have an mpdiff that takes some lines from both parents.
        self.assertEqualDiff(
            'i 1\n'
            '<inventory format="10" revision_id="a@cset-0-3">\n'
            '\n'
            'c 0 1 1 2\n'
            'c 1 3 3 2\n', bytes)

    def test_single_inv_no_parents_as_xml(self):
        self.make_merged_branch()
        sio = self.make_bundle_just_inventories('null:', 'a@cset-0-1',
                                                ['a@cset-0-1'])
        reader = v4.BundleReader(sio, stream_input=False)
        records = list(reader.iter_records())
        self.assertEqual(1, len(records))
        (bytes, metadata, repo_kind, revision_id,
         file_id) = records[0]
        self.assertIs(None, file_id)
        self.assertEqual('a@cset-0-1', revision_id)
        self.assertEqual('inventory', repo_kind)
        self.assertEqual({'parents': [],
                          'sha1': 'a13f42b142d544aac9b085c42595d304150e31a2',
                          'storage_kind': 'mpdiff',
                         }, metadata)
        # We should have an mpdiff that takes some lines from both parents.
        self.assertEqualDiff(
            'i 4\n'
            '<inventory format="10" revision_id="a@cset-0-1">\n'
            '<directory file_id="root-id" name=""'
                ' revision="a@cset-0-1" />\n'
            '<file file_id="file-id" name="file" parent_id="root-id"'
                ' revision="a@cset-0-1"'
                ' text_sha1="09c2f8647e14e49e922b955c194102070597c2d1"'
                ' text_size="17" />\n'
            '</inventory>\n'
            '\n', bytes)

    def test_multiple_inventories_as_xml(self):
        self.make_merged_branch()
        sio = self.make_bundle_just_inventories('a@cset-0-1', 'a@cset-0-3',
            ['a@cset-0-2a', 'a@cset-0-2b', 'a@cset-0-3'])
        reader = v4.BundleReader(sio, stream_input=False)
        records = list(reader.iter_records())
        self.assertEqual(3, len(records))
        revision_ids = [rev_id for b, m, k, rev_id, f in records]
        self.assertEqual(['a@cset-0-2a', 'a@cset-0-2b', 'a@cset-0-3'],
                         revision_ids)
        metadata_2a = records[0][1]
        self.assertEqual({'parents': ['a@cset-0-1'],
                          'sha1': '1e105886d62d510763e22885eec733b66f5f09bf',
                          'storage_kind': 'mpdiff',
                         }, metadata_2a)
        metadata_2b = records[1][1]
        self.assertEqual({'parents': ['a@cset-0-1'],
                          'sha1': 'f03f12574bdb5ed2204c28636c98a8547544ccd8',
                          'storage_kind': 'mpdiff',
                         }, metadata_2b)
        metadata_3 = records[2][1]
        self.assertEqual({'parents': ['a@cset-0-2a', 'a@cset-0-2b'],
                          'sha1': '09c53b0c4de0895e11a2aacc34fef60a6e70865c',
                          'storage_kind': 'mpdiff',
                         }, metadata_3)
        bytes_2a = records[0][0]
        self.assertEqualDiff(
            'i 1\n'
            '<inventory format="10" revision_id="a@cset-0-2a">\n'
            '\n'
            'c 0 1 1 1\n'
            'i 1\n'
            '<file file_id="file-id" name="file" parent_id="root-id"'
                ' revision="a@cset-0-2a"'
                ' text_sha1="50f545ff40e57b6924b1f3174b267ffc4576e9a9"'
                ' text_size="12" />\n'
            '\n'
            'c 0 3 3 1\n', bytes_2a)
        bytes_2b = records[1][0]
        self.assertEqualDiff(
            'i 1\n'
            '<inventory format="10" revision_id="a@cset-0-2b">\n'
            '\n'
            'c 0 1 1 2\n'
            'i 1\n'
            '<file file_id="file2-id" name="other-file" parent_id="root-id"'
                ' revision="a@cset-0-2b"'
                ' text_sha1="b46c0c8ea1e5ef8e46fc8894bfd4752a88ec939e"'
                ' text_size="14" />\n'
            '\n'
            'c 0 3 4 1\n', bytes_2b)
        bytes_3 = records[2][0]
        self.assertEqualDiff(
            'i 1\n'
            '<inventory format="10" revision_id="a@cset-0-3">\n'
            '\n'
            'c 0 1 1 2\n'
            'c 1 3 3 2\n', bytes_3)

    def test_creating_bundle_preserves_chk_pages(self):
        self.make_merged_branch()
        target = self.b1.bzrdir.sprout('target',
                                       revision_id='a@cset-0-2a').open_branch()
        bundle_txt, rev_ids = self.create_bundle_text('a@cset-0-2a',
                                                      'a@cset-0-3')
        self.assertEqual(['a@cset-0-2b', 'a@cset-0-3'], rev_ids)
        bundle = read_bundle(bundle_txt)
        target.lock_write()
        self.addCleanup(target.unlock)
        install_bundle(target.repository, bundle)
        inv1 = self.b1.repository.inventories.get_record_stream([
            ('a@cset-0-3',)], 'unordered',
            True).next().get_bytes_as('fulltext')
        inv2 = target.repository.inventories.get_record_stream([
            ('a@cset-0-3',)], 'unordered',
            True).next().get_bytes_as('fulltext')
        self.assertEqualDiff(inv1, inv2)


class MungedBundleTester(object):

    def build_test_bundle(self):
        wt = self.make_branch_and_tree('b1')

        self.build_tree(['b1/one'])
        wt.add('one')
        wt.commit('add one', rev_id='a@cset-0-1')
        self.build_tree(['b1/two'])
        wt.add('two')
        wt.commit('add two', rev_id='a@cset-0-2',
                  revprops={'branch-nick':'test'})

        bundle_txt = StringIO()
        rev_ids = write_bundle(wt.branch.repository, 'a@cset-0-2',
                               'a@cset-0-1', bundle_txt, self.format)
        self.assertEqual(set(['a@cset-0-2']), set(rev_ids))
        bundle_txt.seek(0, 0)
        return bundle_txt

    def check_valid(self, bundle):
        """Check that after whatever munging, the final object is valid."""
        self.assertEqual(['a@cset-0-2'],
            [r.revision_id for r in bundle.real_revisions])

    def test_extra_whitespace(self):
        bundle_txt = self.build_test_bundle()

        # Seek to the end of the file
        # Adding one extra newline used to give us
        # TypeError: float() argument must be a string or a number
        bundle_txt.seek(0, 2)
        bundle_txt.write('\n')
        bundle_txt.seek(0)

        bundle = read_bundle(bundle_txt)
        self.check_valid(bundle)

    def test_extra_whitespace_2(self):
        bundle_txt = self.build_test_bundle()

        # Seek to the end of the file
        # Adding two extra newlines used to give us
        # MalformedPatches: The first line of all patches should be ...
        bundle_txt.seek(0, 2)
        bundle_txt.write('\n\n')
        bundle_txt.seek(0)

        bundle = read_bundle(bundle_txt)
        self.check_valid(bundle)


class MungedBundleTesterV09(tests.TestCaseWithTransport, MungedBundleTester):

    format = '0.9'

    def test_missing_trailing_whitespace(self):
        bundle_txt = self.build_test_bundle()

        # Remove a trailing newline, it shouldn't kill the parser
        raw = bundle_txt.getvalue()
        # The contents of the bundle don't have to be this, but this
        # test is concerned with the exact case where the serializer
        # creates a blank line at the end, and fails if that
        # line is stripped
        self.assertEqual('\n\n', raw[-2:])
        bundle_txt = StringIO(raw[:-1])

        bundle = read_bundle(bundle_txt)
        self.check_valid(bundle)

    def test_opening_text(self):
        bundle_txt = self.build_test_bundle()

        bundle_txt = StringIO("Some random\nemail comments\n"
                              + bundle_txt.getvalue())

        bundle = read_bundle(bundle_txt)
        self.check_valid(bundle)

    def test_trailing_text(self):
        bundle_txt = self.build_test_bundle()

        bundle_txt = StringIO(bundle_txt.getvalue() +
                              "Some trailing\nrandom\ntext\n")

        bundle = read_bundle(bundle_txt)
        self.check_valid(bundle)


class MungedBundleTesterV4(tests.TestCaseWithTransport, MungedBundleTester):

    format = '4'


class TestBundleWriterReader(tests.TestCase):

    def test_roundtrip_record(self):
        fileobj = StringIO()
        writer = v4.BundleWriter(fileobj)
        writer.begin()
        writer.add_info_record(foo='bar')
        writer._add_record("Record body", {'parents': ['1', '3'],
            'storage_kind':'fulltext'}, 'file', 'revid', 'fileid')
        writer.end()
        fileobj.seek(0)
        reader = v4.BundleReader(fileobj, stream_input=True)
        record_iter = reader.iter_records()
        record = record_iter.next()
        self.assertEqual((None, {'foo': 'bar', 'storage_kind': 'header'},
            'info', None, None), record)
        record = record_iter.next()
        self.assertEqual(("Record body", {'storage_kind': 'fulltext',
                          'parents': ['1', '3']}, 'file', 'revid', 'fileid'),
                          record)

    def test_roundtrip_record_memory_hungry(self):
        fileobj = StringIO()
        writer = v4.BundleWriter(fileobj)
        writer.begin()
        writer.add_info_record(foo='bar')
        writer._add_record("Record body", {'parents': ['1', '3'],
            'storage_kind':'fulltext'}, 'file', 'revid', 'fileid')
        writer.end()
        fileobj.seek(0)
        reader = v4.BundleReader(fileobj, stream_input=False)
        record_iter = reader.iter_records()
        record = record_iter.next()
        self.assertEqual((None, {'foo': 'bar', 'storage_kind': 'header'},
            'info', None, None), record)
        record = record_iter.next()
        self.assertEqual(("Record body", {'storage_kind': 'fulltext',
                          'parents': ['1', '3']}, 'file', 'revid', 'fileid'),
                          record)

    def test_encode_name(self):
        self.assertEqual('revision/rev1',
            v4.BundleWriter.encode_name('revision', 'rev1'))
        self.assertEqual('file/rev//1/file-id-1',
            v4.BundleWriter.encode_name('file', 'rev/1', 'file-id-1'))
        self.assertEqual('info',
            v4.BundleWriter.encode_name('info', None, None))

    def test_decode_name(self):
        self.assertEqual(('revision', 'rev1', None),
            v4.BundleReader.decode_name('revision/rev1'))
        self.assertEqual(('file', 'rev/1', 'file-id-1'),
            v4.BundleReader.decode_name('file/rev//1/file-id-1'))
        self.assertEqual(('info', None, None),
                         v4.BundleReader.decode_name('info'))

    def test_too_many_names(self):
        fileobj = StringIO()
        writer = v4.BundleWriter(fileobj)
        writer.begin()
        writer.add_info_record(foo='bar')
        writer._container.add_bytes_record('blah', ['two', 'names'])
        writer.end()
        fileobj.seek(0)
        record_iter = v4.BundleReader(fileobj).iter_records()
        record = record_iter.next()
        self.assertEqual((None, {'foo': 'bar', 'storage_kind': 'header'},
            'info', None, None), record)
        self.assertRaises(errors.BadBundle, record_iter.next)


class TestReadMergeableFromUrl(tests.TestCaseWithTransport):

    def test_read_mergeable_skips_local(self):
        """A local bundle named like the URL should not be read.
        """
        out, wt = test_read_bundle.create_bundle_file(self)
        class FooService(object):
            """A directory service that always returns source"""

            def look_up(self, name, url):
                return 'source'
        directories.register('foo:', FooService, 'Testing directory service')
        self.addCleanup(lambda: directories.remove('foo:'))
        self.build_tree_contents([('./foo:bar', out.getvalue())])
        self.assertRaises(errors.NotABundle, read_mergeable_from_url,
                          'foo:bar')

    def test_infinite_redirects_are_not_a_bundle(self):
        """If a URL causes TooManyRedirections then NotABundle is raised.
        """
        from bzrlib.tests.blackbox.test_push import RedirectingMemoryServer
        server = RedirectingMemoryServer()
        server.setUp()
        url = server.get_url() + 'infinite-loop'
        self.addCleanup(server.tearDown)
        self.assertRaises(errors.NotABundle, read_mergeable_from_url, url)

    def test_smart_server_connection_reset(self):
        """If a smart server connection fails during the attempt to read a
        bundle, then the ConnectionReset error should be propagated.
        """
        # Instantiate a server that will provoke a ConnectionReset
        sock_server = _DisconnectingTCPServer()
        sock_server.setUp()
        self.addCleanup(sock_server.tearDown)
        # We don't really care what the url is since the server will close the
        # connection without interpreting it
        url = sock_server.get_url()
        self.assertRaises(errors.ConnectionReset, read_mergeable_from_url, url)


class _DisconnectingTCPServer(object):
    """A TCP server that immediately closes any connection made to it."""

    def setUp(self):
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.sock.bind(('127.0.0.1', 0))
        self.sock.listen(1)
        self.port = self.sock.getsockname()[1]
        self.thread = threading.Thread(
            name='%s (port %d)' % (self.__class__.__name__, self.port),
            target=self.accept_and_close)
        self.thread.start()

    def accept_and_close(self):
        conn, addr = self.sock.accept()
        conn.shutdown(socket.SHUT_RDWR)
        conn.close()

    def get_url(self):
        return 'bzr://127.0.0.1:%d/' % (self.port,)

    def tearDown(self):
        try:
            # make sure the thread dies by connecting to the listening socket,
            # just in case the test failed to do so.
            conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            conn.connect(self.sock.getsockname())
            conn.close()
        except socket.error:
            pass
        self.sock.close()
        self.thread.join()

