/brz/remove-bazaar

# Copyright (C) 2005, 2006 Canonical Ltd

# Authors:  Robert Collins <robert.collins@canonical.com>

#

# 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

from bzrlib import (

    branch,

    bzrdir,

    conflicts,

    errors,

    mutabletree,

    osutils,

    revision as _mod_revision,

    ui,

    uncommit,

    workingtree,

    )

from bzrlib.errors import (NotBranchError, NotVersionedError,

                           UnsupportedOperation)

from bzrlib.osutils import pathjoin, getcwd

from bzrlib.tests import TestCase

from bzrlib.tests.per_workingtree import TestCaseWithWorkingTree

from bzrlib.trace import mutter

from bzrlib.workingtree import (TreeEntry, TreeDirectory, TreeFile, TreeLink,

                                WorkingTree)

class CapturingUIFactory(ui.UIFactory):

    """A UI Factory for testing - capture the updates made through it."""

    def __init__(self):

        super(CapturingUIFactory, self).__init__()

        self._calls = []

        self.depth = 0

    def clear(self):

        """See progress.ProgressTask.clear()."""

    def clear_term(self):

        """See progress.ProgressTask.clear_term()."""

    def finished(self):

        """See progress.ProgressTask.finished()."""

        self.depth -= 1

    def note(self, fmt_string, *args, **kwargs):

        """See progress.ProgressTask.note()."""

    def progress_bar(self):

        return self

    def nested_progress_bar(self):

        self.depth += 1

        return self

    def update(self, message, count=None, total=None):

        """See progress.ProgressTask.update()."""

        if self.depth == 1:

            self._calls.append(("update", count, total, message))

class TestCapturingUI(TestCase):

    def test_nested_ignore_depth_beyond_one(self):

        # we only want to capture the first level out progress, not

        # want sub-components might do. So we have nested bars ignored.

        factory = CapturingUIFactory()

        pb1 = factory.nested_progress_bar()

        pb1.update('foo', 0, 1)

        pb2 = factory.nested_progress_bar()

        pb2.update('foo', 0, 1)

        pb2.finished()

        pb1.finished()

        self.assertEqual([("update", 0, 1, 'foo')], factory._calls)

class TestCommit(TestCaseWithWorkingTree):

    def test_autodelete_renamed(self):

        tree_a = self.make_branch_and_tree('a')

        self.build_tree(['a/dir/', 'a/dir/f1', 'a/dir/f2'])

        tree_a.add(['dir', 'dir/f1', 'dir/f2'], ['dir-id', 'f1-id', 'f2-id'])

        rev_id1 = tree_a.commit('init')

        # Start off by renaming entries,

        # but then actually auto delete the whole tree

        # https://bugs.launchpad.net/bzr/+bug/114615

        tree_a.rename_one('dir/f1', 'dir/a')

        tree_a.rename_one('dir/f2', 'dir/z')

        osutils.rmtree('a/dir')

        tree_a.commit('autoremoved')

        tree_a.lock_read()

        try:

            root_id = tree_a.get_root_id()

            paths = [(path, ie.file_id)

                     for path, ie in tree_a.iter_entries_by_dir()]

        finally:

            tree_a.unlock()

        # The only paths left should be the root

        self.assertEqual([('', root_id)], paths)

    def test_no_autodelete_renamed_away(self):

        tree_a = self.make_branch_and_tree('a')

        self.build_tree(['a/dir/', 'a/dir/f1', 'a/dir/f2', 'a/dir2/'])

        tree_a.add(['dir', 'dir/f1', 'dir/f2', 'dir2'],

                   ['dir-id', 'f1-id', 'f2-id', 'dir2-id'])

        rev_id1 = tree_a.commit('init')

        # Rename one entry out of this directory

        tree_a.rename_one('dir/f1', 'dir2/a')

        osutils.rmtree('a/dir')

        tree_a.commit('autoremoved')

        tree_a.lock_read()

        try:

            root_id = tree_a.get_root_id()

            paths = [(path, ie.file_id)

                     for path, ie in tree_a.iter_entries_by_dir()]

        finally:

            tree_a.unlock()

        # The only paths left should be the root

        self.assertEqual([('', root_id), ('dir2', 'dir2-id'),

                          ('dir2/a', 'f1-id'),

                         ], paths)

    def test_no_autodelete_alternate_renamed(self):

        # Test for bug #114615

        tree_a = self.make_branch_and_tree('A')

        self.build_tree(['A/a/', 'A/a/m', 'A/a/n'])

        tree_a.add(['a', 'a/m', 'a/n'], ['a-id', 'm-id', 'n-id'])

        tree_a.commit('init')

        tree_a.lock_read()

        try:

            root_id = tree_a.get_root_id()

        finally:

            tree_a.unlock()

        tree_b = tree_a.bzrdir.sprout('B').open_workingtree()

        self.build_tree(['B/xyz/'])

        tree_b.add(['xyz'], ['xyz-id'])

        tree_b.rename_one('a/m', 'xyz/m')

        osutils.rmtree('B/a')

        tree_b.commit('delete in B')

        paths = [(path, ie.file_id)

                 for path, ie in tree_b.iter_entries_by_dir()]

        self.assertEqual([('', root_id),

                          ('xyz', 'xyz-id'),

                          ('xyz/m', 'm-id'),

                         ], paths)

        self.build_tree_contents([('A/a/n', 'new contents for n\n')])

        tree_a.commit('change n in A')

        # Merging from A should introduce conflicts because 'n' was modified

        # and removed, so 'a' needs to be restored.

        num_conflicts = tree_b.merge_from_branch(tree_a.branch)

        self.assertEqual(3, num_conflicts)

        paths = [(path, ie.file_id)

                 for path, ie in tree_b.iter_entries_by_dir()]

        self.assertEqual([('', root_id),

                          ('a', 'a-id'),

                          ('xyz', 'xyz-id'),

                          ('a/n.OTHER', 'n-id'),

                          ('xyz/m', 'm-id'),

                         ], paths)

        osutils.rmtree('B/a')

        try:

            # bzr resolve --all

            tree_b.set_conflicts(conflicts.ConflictList())

        except errors.UnsupportedOperation:

            # On WT2, set_conflicts is unsupported, but the rmtree has the same

            # effect.

            pass

        tree_b.commit('autoremove a, without touching xyz/m')

        paths = [(path, ie.file_id)

                 for path, ie in tree_b.iter_entries_by_dir()]

        self.assertEqual([('', root_id),

                          ('xyz', 'xyz-id'),

                          ('xyz/m', 'm-id'),

                         ], paths)

    def test_commit_exclude_pending_merge_fails(self):

        """Excludes are a form of partial commit."""

        wt = self.make_branch_and_tree('.')

        self.build_tree(['foo'])

        wt.add('foo')

        wt.commit('commit one')

        wt2 = wt.bzrdir.sprout('to').open_workingtree()

        wt2.commit('change_right')

        wt.merge_from_branch(wt2.branch)

        self.assertRaises(errors.CannotCommitSelectedFileMerge,

            wt.commit, 'test', exclude=['foo'])

    def test_commit_exclude_exclude_changed_is_pointless(self):

        tree = self.make_branch_and_tree('.')

        self.build_tree(['a'])

        tree.smart_add(['.'])

        tree.commit('setup test')

        self.build_tree_contents([('a', 'new contents for "a"\n')])

        self.assertRaises(errors.PointlessCommit, tree.commit, 'test',

            exclude=['a'], allow_pointless=False)

    def test_commit_exclude_excludes_modified_files(self):

        tree = self.make_branch_and_tree('.')

        self.build_tree(['a', 'b', 'c'])

        tree.smart_add(['.'])

        tree.commit('test', exclude=['b', 'c'])

        # If b was excluded it will still be 'added' in status.

        tree.lock_read()

        self.addCleanup(tree.unlock)

        changes = list(tree.iter_changes(tree.basis_tree()))

        self.assertEqual(2, len(changes))

        self.assertEqual((None, 'b'), changes[0][1])

        self.assertEqual((None, 'c'), changes[1][1])

    def test_commit_exclude_subtree_of_selected(self):

        tree = self.make_branch_and_tree('.')

        self.build_tree(['a/', 'a/b'])

        tree.smart_add(['.'])

        tree.commit('test', specific_files=['a'], exclude=['a/b'])

        # If a/b was excluded it will still be 'added' in status.

        tree.lock_read()

        self.addCleanup(tree.unlock)

        changes = list(tree.iter_changes(tree.basis_tree()))

        self.assertEqual(1, len(changes))

        self.assertEqual((None, 'a/b'), changes[0][1])

    def test_commit_sets_last_revision(self):

        tree = self.make_branch_and_tree('tree')

        committed_id = tree.commit('foo', rev_id='foo')

        self.assertEqual(['foo'], tree.get_parent_ids())

        # the commit should have returned the same id we asked for.

        self.assertEqual('foo', committed_id)

    def test_commit_returns_revision_id(self):

        tree = self.make_branch_and_tree('.')

        committed_id = tree.commit('message')

        self.assertTrue(tree.branch.repository.has_revision(committed_id))

        self.assertNotEqual(None, committed_id)

    def test_commit_local_unbound(self):

        # using the library api to do a local commit on unbound branches is

        # also an error

        tree = self.make_branch_and_tree('tree')

        self.assertRaises(errors.LocalRequiresBoundBranch,

                          tree.commit,

                          'foo',

                          local=True)

    def test_commit_merged_kind_change(self):

        """Test merging a kind change.

        Test making a kind change in a working tree, and then merging that

        from another. When committed it should commit the new kind.

        """

        wt = self.make_branch_and_tree('.')

        self.build_tree(['a'])

        wt.add(['a'])

        wt.commit('commit one')

        wt2 = wt.bzrdir.sprout('to').open_workingtree()

        os.remove('a')

        os.mkdir('a')

        wt.commit('changed kind')

        wt2.merge_from_branch(wt.branch)

        wt2.commit('merged kind change')

    def test_commit_aborted_does_not_apply_automatic_changes_bug_282402(self):

        wt = self.make_branch_and_tree('.')

        wt.add(['a'], ['a-id'], ['file'])

        def fail_message(obj):

            raise errors.BzrCommandError("empty commit message")

        self.assertRaises(errors.BzrCommandError, wt.commit,

            message_callback=fail_message)

        self.assertEqual('a', wt.id2path('a-id'))

    def test_local_commit_ignores_master(self):

        # a --local commit does not require access to the master branch

        # at all, or even for it to exist.

        # we test this by setting up a bound branch and then corrupting

        # the master.

        master = self.make_branch('master')

        tree = self.make_branch_and_tree('tree')

        try:

            tree.branch.bind(master)

        except errors.UpgradeRequired:

            # older format.

            return

        master.bzrdir.transport.put_bytes('branch-format', 'garbage')

        del master

        # check its corrupted.

        self.assertRaises(errors.UnknownFormatError,

                          bzrdir.BzrDir.open,

                          'master')

        tree.commit('foo', rev_id='foo', local=True)

    def test_local_commit_does_not_push_to_master(self):

        # a --local commit does not require access to the master branch

        # at all, or even for it to exist.

        # we test that even when its available it does not push to it.

        master = self.make_branch('master')

        tree = self.make_branch_and_tree('tree')

        try:

            tree.branch.bind(master)

        except errors.UpgradeRequired:

            # older format.

            return

        tree.commit('foo', rev_id='foo', local=True)

        self.failIf(master.repository.has_revision('foo'))

        self.assertEqual(_mod_revision.NULL_REVISION,

                         (_mod_revision.ensure_null(master.last_revision())))

    def test_record_initial_ghost(self):

        """The working tree needs to record ghosts during commit."""

        wt = self.make_branch_and_tree('.')

        wt.set_parent_ids(['non:existent@rev--ision--0--2'],

            allow_leftmost_as_ghost=True)

        rev_id = wt.commit('commit against a ghost first parent.')

        rev = wt.branch.repository.get_revision(rev_id)

        self.assertEqual(rev.parent_ids, ['non:existent@rev--ision--0--2'])

        # parent_sha1s is not populated now, WTF. rbc 20051003

        self.assertEqual(len(rev.parent_sha1s), 0)

    def test_record_two_ghosts(self):

        """The working tree should preserve all the parents during commit."""

        wt = self.make_branch_and_tree('.')

        wt.set_parent_ids([

                'foo@azkhazan-123123-abcabc',

                'wibble@fofof--20050401--1928390812',

            ],

            allow_leftmost_as_ghost=True)

        rev_id = wt.commit("commit from ghost base with one merge")

        # the revision should have been committed with two parents

        rev = wt.branch.repository.get_revision(rev_id)

        self.assertEqual(['foo@azkhazan-123123-abcabc',

            'wibble@fofof--20050401--1928390812'],

            rev.parent_ids)

    def test_commit_deleted_subtree_and_files_updates_workingtree(self):

        """The working trees inventory may be adjusted by commit."""

        wt = self.make_branch_and_tree('.')

        wt.lock_write()

        self.build_tree(['a', 'b/', 'b/c', 'd'])

        wt.add(['a', 'b', 'b/c', 'd'], ['a-id', 'b-id', 'c-id', 'd-id'])

        this_dir = self.get_transport()

        this_dir.delete_tree('b')

        this_dir.delete('d')

        # now we have a tree with a through d in the inventory, but only

        # a present on disk. After commit b-id, c-id and d-id should be

        # missing from the inventory, within the same tree transaction.

        wt.commit('commit stuff')

        self.assertTrue(wt.has_id('a-id'))

        self.assertFalse(wt.has_or_had_id('b-id'))

        self.assertFalse(wt.has_or_had_id('c-id'))

        self.assertFalse(wt.has_or_had_id('d-id'))

        self.assertTrue(wt.has_filename('a'))

        self.assertFalse(wt.has_filename('b'))

        self.assertFalse(wt.has_filename('b/c'))

        self.assertFalse(wt.has_filename('d'))

        wt.unlock()

        # the changes should have persisted to disk - reopen the workingtree

        # to be sure.

        wt = wt.bzrdir.open_workingtree()

        wt.lock_read()

        self.assertTrue(wt.has_id('a-id'))

        self.assertFalse(wt.has_or_had_id('b-id'))

        self.assertFalse(wt.has_or_had_id('c-id'))

        self.assertFalse(wt.has_or_had_id('d-id'))

        self.assertTrue(wt.has_filename('a'))

        self.assertFalse(wt.has_filename('b'))

        self.assertFalse(wt.has_filename('b/c'))

        self.assertFalse(wt.has_filename('d'))

        wt.unlock()

    def test_commit_deleted_subtree_with_removed(self):

        wt = self.make_branch_and_tree('.')

        self.build_tree(['a', 'b/', 'b/c', 'd'])

        wt.add(['a', 'b', 'b/c'], ['a-id', 'b-id', 'c-id'])

        wt.commit('first')

        wt.remove('b/c')

        this_dir = self.get_transport()

        this_dir.delete_tree('b')

        wt.lock_write()

        wt.commit('commit deleted rename')

        self.assertTrue(wt.has_id('a-id'))

        self.assertFalse(wt.has_or_had_id('b-id'))

        self.assertFalse(wt.has_or_had_id('c-id'))

        self.assertTrue(wt.has_filename('a'))

        self.assertFalse(wt.has_filename('b'))

        self.assertFalse(wt.has_filename('b/c'))

        wt.unlock()

    def test_commit_move_new(self):

        wt = self.make_branch_and_tree('first')

        wt.commit('first')

        wt2 = wt.bzrdir.sprout('second').open_workingtree()

        self.build_tree(['second/name1'])

        wt2.add('name1', 'name1-id')

        wt2.commit('second')

        wt.merge_from_branch(wt2.branch)

        wt.rename_one('name1', 'name2')

        wt.commit('third')

        wt.path2id('name1-id')

    def test_nested_commit(self):

        """Commit in multiply-nested trees"""

        tree = self.make_branch_and_tree('.')

        if not tree.supports_tree_reference():

            # inapplicable test.

            return

        subtree = self.make_branch_and_tree('subtree')

        subsubtree = self.make_branch_and_tree('subtree/subtree')

        subtree.add(['subtree'])

        tree.add(['subtree'])

        # use allow_pointless=False to ensure that the deepest tree, which

        # has no commits made to it, does not get a pointless commit.

        rev_id = tree.commit('added reference', allow_pointless=False)

        tree.lock_read()

        self.addCleanup(tree.unlock)

        # the deepest subtree has not changed, so no commit should take place.

        self.assertEqual('null:', subsubtree.last_revision())

        # the intermediate tree should have committed a pointer to the current

        # subtree revision.

        sub_basis = subtree.basis_tree()

        sub_basis.lock_read()

        self.addCleanup(sub_basis.unlock)

        self.assertEqual(subsubtree.last_revision(),

            sub_basis.get_reference_revision(sub_basis.path2id('subtree')))

        # the intermediate tree has changed, so should have had a commit

        # take place.

        self.assertNotEqual(None, subtree.last_revision())

        # the outer tree should have committed a pointer to the current

        # subtree revision.

        basis = tree.basis_tree()

        basis.lock_read()

        self.addCleanup(basis.unlock)

        self.assertEqual(subtree.last_revision(),

            basis.get_reference_revision(basis.path2id('subtree')))

        # the outer tree must have have changed too.

        self.assertNotEqual(None, rev_id)

    def test_nested_commit_second_commit_detects_changes(self):

        """Commit with a nested tree picks up the correct child revid."""

        tree = self.make_branch_and_tree('.')

        if not tree.supports_tree_reference():

            # inapplicable test.

            return

        subtree = self.make_branch_and_tree('subtree')

        tree.add(['subtree'])

        self.build_tree(['subtree/file'])

        subtree.add(['file'], ['file-id'])

        rev_id = tree.commit('added reference', allow_pointless=False)

        tree.get_reference_revision(tree.path2id('subtree'))

        child_revid = subtree.last_revision()

        # now change the child tree

        self.build_tree_contents([('subtree/file', 'new-content')])

        # and commit in the parent should commit the child and grab its revid,

        # we test with allow_pointless=False here so that we are simulating

        # what users will see.

        rev_id2 = tree.commit('changed subtree only', allow_pointless=False)

        # the child tree has changed, so should have had a commit

        # take place.

        self.assertNotEqual(None, subtree.last_revision())

        self.assertNotEqual(child_revid, subtree.last_revision())

        # the outer tree should have committed a pointer to the current

        # subtree revision.

        basis = tree.basis_tree()

        basis.lock_read()

        self.addCleanup(basis.unlock)

        self.assertEqual(subtree.last_revision(),

            basis.get_reference_revision(basis.path2id('subtree')))

        self.assertNotEqual(rev_id, rev_id2)

    def test_nested_pointless_commits_are_pointless(self):

        tree = self.make_branch_and_tree('.')

        if not tree.supports_tree_reference():

            # inapplicable test.

            return

        subtree = self.make_branch_and_tree('subtree')

        tree.add(['subtree'])

        # record the reference.

        rev_id = tree.commit('added reference')

        child_revid = subtree.last_revision()

        # now do a no-op commit with allow_pointless=False

        self.assertRaises(errors.PointlessCommit, tree.commit, '',

            allow_pointless=False)

        self.assertEqual(child_revid, subtree.last_revision())

        self.assertEqual(rev_id, tree.last_revision())

class TestCommitProgress(TestCaseWithWorkingTree):

    def setUp(self):

        super(TestCommitProgress, self).setUp()

        ui.ui_factory = CapturingUIFactory()

    def test_commit_progress_steps(self):

        # during commit we one progress update for every entry in the

        # inventory, and then one for the inventory, and one for the

        # inventory, and one for the revision insertions.

        # first we need a test commit to do. Lets setup a branch with

        # 3 files, and alter one in a selected-file commit. This exercises

        # a number of cases quickly. We should also test things like

        # selective commits which excludes newly added files.

        tree = self.make_branch_and_tree('.')

        self.build_tree(['a', 'b', 'c'])

        tree.add(['a', 'b', 'c'])

        tree.commit('first post')

        f = file('b', 'wt')

        f.write('new content')

        f.close()

        # set a progress bar that captures the calls so we can see what is

        # emitted

        factory = CapturingUIFactory()

        ui.ui_factory = factory

        # TODO RBC 20060421 it would be nice to merge the reporter output

        # into the factory for this test - just make the test ui factory

        # pun as a reporter. Then we can check the ordering is right.

        tree.commit('second post', specific_files=['b'])

        # 5 steps, the first of which is reported 2 times, once per dir

        self.assertEqual(

            [('update', 1, 5, 'Collecting changes [0] - Stage'),

             ('update', 1, 5, 'Collecting changes [1] - Stage'),

             ('update', 2, 5, 'Saving data locally - Stage'),

             ('update', 3, 5, 'Running pre_commit hooks - Stage'),

             ('update', 4, 5, 'Updating the working tree - Stage'),

             ('update', 5, 5, 'Running post_commit hooks - Stage')],

            factory._calls

           )

    def test_commit_progress_shows_post_hook_names(self):

        tree = self.make_branch_and_tree('.')

        # set a progress bar that captures the calls so we can see what is

        # emitted

        factory = CapturingUIFactory()

        ui.ui_factory = factory

        def a_hook(_, _2, _3, _4, _5, _6):

            pass

        branch.Branch.hooks.install_named_hook('post_commit', a_hook,

                                               'hook name')

        tree.commit('first post')

        self.assertEqual(

            [('update', 1, 5, 'Collecting changes [0] - Stage'),

             ('update', 1, 5, 'Collecting changes [1] - Stage'),

             ('update', 2, 5, 'Saving data locally - Stage'),

             ('update', 3, 5, 'Running pre_commit hooks - Stage'),

             ('update', 4, 5, 'Updating the working tree - Stage'),

             ('update', 5, 5, 'Running post_commit hooks - Stage'),

             ('update', 5, 5, 'Running post_commit hooks [hook name] - Stage'),

             ],

            factory._calls

           )

    def test_commit_progress_shows_pre_hook_names(self):

        tree = self.make_branch_and_tree('.')

        # set a progress bar that captures the calls so we can see what is

        # emitted

        factory = CapturingUIFactory()

        ui.ui_factory = factory

        def a_hook(_, _2, _3, _4, _5, _6, _7, _8):

            pass

        branch.Branch.hooks.install_named_hook('pre_commit', a_hook,

                                               'hook name')

        tree.commit('first post')

        self.assertEqual(

            [('update', 1, 5, 'Collecting changes [0] - Stage'),

             ('update', 1, 5, 'Collecting changes [1] - Stage'),

             ('update', 2, 5, 'Saving data locally - Stage'),

             ('update', 3, 5, 'Running pre_commit hooks - Stage'),

             ('update', 3, 5, 'Running pre_commit hooks [hook name] - Stage'),

             ('update', 4, 5, 'Updating the working tree - Stage'),

             ('update', 5, 5, 'Running post_commit hooks - Stage'),

             ],

            factory._calls

           )

    def test_start_commit_hook(self):

        """Make sure a start commit hook can modify the tree that is

        committed."""

        def start_commit_hook_adds_file(tree):

            open(tree.abspath("newfile"), 'w').write("data")

            tree.add(["newfile"])

        def restoreDefaults():

            mutabletree.MutableTree.hooks['start_commit'] = []

        self.addCleanup(restoreDefaults)

        tree = self.make_branch_and_tree('.')

        mutabletree.MutableTree.hooks.install_named_hook(

            'start_commit',

            start_commit_hook_adds_file,

            None)

        revid = tree.commit('first post')

        committed_tree = tree.basis_tree()

        self.assertTrue(committed_tree.has_filename("newfile"))

    def test_post_commit_hook(self):

        """Make sure a post_commit hook is called after a commit."""

        def post_commit_hook_test_params(params):

            self.assertTrue(isinstance(params,

                mutabletree.PostCommitHookParams))

            self.assertTrue(isinstance(params.mutable_tree,

                mutabletree.MutableTree))

            open(tree.abspath("newfile"), 'w').write("data")

            params.mutable_tree.add(["newfile"])

        tree = self.make_branch_and_tree('.')

        mutabletree.MutableTree.hooks.install_named_hook(

            'post_commit',

            post_commit_hook_test_params,

            None)

        self.assertFalse(tree.has_filename("newfile"))

        revid = tree.commit('first post')

        self.assertTrue(tree.has_filename("newfile"))

        committed_tree = tree.basis_tree()

        self.assertFalse(committed_tree.has_filename("newfile"))