~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2006, 2007, 2009, 2010 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

import os

from bzrlib import merge, tests, transform, workingtree

class TestRevert(tests.TestCaseWithTransport):

    """Ensure that revert behaves as expected"""

    def test_revert_merged_dir(self):

        """Reverting a merge that adds a directory deletes the directory"""

        source_tree = self.make_branch_and_tree('source')

        source_tree.commit('empty tree')

        target_tree = source_tree.bzrdir.sprout('target').open_workingtree()

        self.build_tree(['source/dir/', 'source/dir/contents'])

        source_tree.add(['dir', 'dir/contents'], ['dir-id', 'contents-id'])

        source_tree.commit('added dir')

        target_tree.lock_write()

        self.addCleanup(target_tree.unlock)

        merge.merge_inner(target_tree.branch, source_tree.basis_tree(),

                          target_tree.basis_tree(), this_tree=target_tree)

        self.assertPathExists('target/dir')

        self.assertPathExists('target/dir/contents')

        target_tree.revert()

        self.assertPathDoesNotExist('target/dir/contents')

        self.assertPathDoesNotExist('target/dir')

    def test_revert_new(self):

        """Only locally-changed new files should be preserved when reverting

        When a file isn't present in revert's target tree:

        If a file hasn't been committed, revert should unversion it, but not

        delete it.

        If a file has local changes, revert should unversion it, but not

        delete it.

        If a file has no changes from the last commit, revert should delete it.

        If a file has changes due to a merge, revert should delete it.

        """

        tree = self.make_branch_and_tree('tree')

        tree.commit('empty tree')

        merge_target = tree.bzrdir.sprout('merge_target').open_workingtree()

        self.build_tree(['tree/new_file'])

        # newly-added files should not be deleted

        tree.add('new_file')

        basis_tree = tree.branch.repository.revision_tree(tree.last_revision())

        tree.revert()

        self.assertPathExists('tree/new_file')

        # unchanged files should be deleted

        tree.add('new_file')

        tree.commit('add new_file')

        tree.revert(old_tree=basis_tree)

        self.assertPathDoesNotExist('tree/new_file')

        # files should be deleted if their changes came from merges

        merge_target.merge_from_branch(tree.branch)

        self.assertPathExists('merge_target/new_file')

        merge_target.revert()

        self.assertPathDoesNotExist('merge_target/new_file')

        # files should not be deleted if changed after a merge

        merge_target.merge_from_branch(tree.branch)

        self.assertPathExists('merge_target/new_file')

        self.build_tree_contents([('merge_target/new_file', 'new_contents')])

        merge_target.revert()

        self.assertPathExists('merge_target/new_file')

    def tree_with_executable(self):

        tree = self.make_branch_and_tree('tree')

        tt = transform.TreeTransform(tree)

        tt.new_file('newfile', tt.root, 'helooo!', 'newfile-id', True)

        tt.apply()

        tree.lock_write()

        try:

            self.assertTrue(tree.is_executable('newfile-id'))

            tree.commit('added newfile')

        finally:

            tree.unlock()

        return tree

    def test_preserve_execute(self):

        tree = self.tree_with_executable()

        tt = transform.TreeTransform(tree)

        newfile = tt.trans_id_tree_file_id('newfile-id')

        tt.delete_contents(newfile)

        tt.create_file('Woooorld!', newfile)

        tt.apply()

        tree = workingtree.WorkingTree.open('tree')

        tree.lock_write()

        self.addCleanup(tree.unlock)

        self.assertTrue(tree.is_executable('newfile-id'))

        transform.revert(tree, tree.basis_tree(), None, backups=True)

        self.assertEqual('helooo!', tree.get_file('newfile-id').read())

        self.assertTrue(tree.is_executable('newfile-id'))

    def test_revert_executable(self):

        tree = self.tree_with_executable()

        tt = transform.TreeTransform(tree)

        newfile = tt.trans_id_tree_file_id('newfile-id')

        tt.set_executability(False, newfile)

        tt.apply()

        tree.lock_write()

        self.addCleanup(tree.unlock)

        transform.revert(tree, tree.basis_tree(), None)

        self.assertTrue(tree.is_executable('newfile-id'))

    def test_revert_deletes_files_from_revert(self):

        tree = self.make_branch_and_tree('.')

        self.build_tree(['file'])

        tree.add('file')

        tree.commit('added file', rev_id='rev1')

        os.unlink('file')

        tree.commit('removed file')

        self.assertPathDoesNotExist('file')

        tree.revert(old_tree=tree.branch.repository.revision_tree('rev1'))

        self.assertPathExists('file')

        tree.revert()

        self.assertPathDoesNotExist('file')

        self.assertEqual({}, tree.merge_modified())

    def test_revert_file_in_deleted_dir(self):

        tree = self.make_branch_and_tree('.')

        self.build_tree(['dir/', 'dir/file1', 'dir/file2'])

        tree.add(['dir', 'dir/file1', 'dir/file2'],

                 ['dir-id', 'file1-id', 'file2-id'])

        tree.commit("Added files")

        os.unlink('dir/file1')

        os.unlink('dir/file2')

        os.rmdir('dir')

        tree.remove(['dir/', 'dir/file1', 'dir/file2'])

        tree.revert(['dir/file1'])

        self.assertPathExists('dir/file1')

        self.assertPathDoesNotExist('dir/file2')

        self.assertEqual('dir-id', tree.path2id('dir'))

    def test_revert_root_id_change(self):

        tree = self.make_branch_and_tree('.')

        tree.set_root_id('initial-root-id')

        self.build_tree(['file1'])

        tree.add(['file1'])

        tree.commit('first')

        tree.set_root_id('temp-root-id')

        self.assertEqual('temp-root-id', tree.get_root_id())

        tree.revert()

        self.assertEqual('initial-root-id', tree.get_root_id())