~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2006 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import os
import stat
import sys

from bzrlib import (
    tests,
    urlutils,
    )
from bzrlib.bzrdir import BzrDir
from bzrlib.conflicts import (DuplicateEntry, DuplicateID, MissingParent,
                              UnversionedParent, ParentLoop, DeletingParent,)
from bzrlib.errors import (DuplicateKey, MalformedTransform, NoSuchFile,
                           ReusingTransform, CantMoveRoot, 
                           PathsNotVersionedError, ExistingLimbo,
                           ImmortalLimbo, LockError)
from bzrlib.osutils import file_kind, has_symlinks, pathjoin
from bzrlib.merge import Merge3Merger
from bzrlib.tests import TestCaseInTempDir, TestSkipped, TestCase
from bzrlib.transform import (TreeTransform, ROOT_PARENT, FinalPaths, 
                              resolve_conflicts, cook_conflicts, 
                              find_interesting, build_tree, get_backup_name)


class TestTreeTransform(TestCaseInTempDir):

    def setUp(self):
        super(TestTreeTransform, self).setUp()
        self.wt = BzrDir.create_standalone_workingtree('.')
        os.chdir('..')

    def get_transform(self):
        transform = TreeTransform(self.wt)
        #self.addCleanup(transform.finalize)
        return transform, transform.trans_id_tree_file_id(self.wt.get_root_id())

    def test_existing_limbo(self):
        limbo_name = urlutils.local_path_from_url(
            self.wt._control_files.controlfilename('limbo'))
        transform, root = self.get_transform()
        os.mkdir(pathjoin(limbo_name, 'hehe'))
        self.assertRaises(ImmortalLimbo, transform.apply)
        self.assertRaises(LockError, self.wt.unlock)
        self.assertRaises(ExistingLimbo, self.get_transform)
        self.assertRaises(LockError, self.wt.unlock)
        os.rmdir(pathjoin(limbo_name, 'hehe'))
        os.rmdir(limbo_name)
        transform, root = self.get_transform()
        transform.apply()

    def test_build(self):
        transform, root = self.get_transform() 
        self.assertIs(transform.get_tree_parent(root), ROOT_PARENT)
        imaginary_id = transform.trans_id_tree_path('imaginary')
        imaginary_id2 = transform.trans_id_tree_path('imaginary/')
        self.assertEqual(imaginary_id, imaginary_id2)
        self.assertEqual(transform.get_tree_parent(imaginary_id), root)
        self.assertEqual(transform.final_kind(root), 'directory')
        self.assertEqual(transform.final_file_id(root), self.wt.get_root_id())
        trans_id = transform.create_path('name', root)
        self.assertIs(transform.final_file_id(trans_id), None)
        self.assertRaises(NoSuchFile, transform.final_kind, trans_id)
        transform.create_file('contents', trans_id)
        transform.set_executability(True, trans_id)
        transform.version_file('my_pretties', trans_id)
        self.assertRaises(DuplicateKey, transform.version_file,
                          'my_pretties', trans_id)
        self.assertEqual(transform.final_file_id(trans_id), 'my_pretties')
        self.assertEqual(transform.final_parent(trans_id), root)
        self.assertIs(transform.final_parent(root), ROOT_PARENT)
        self.assertIs(transform.get_tree_parent(root), ROOT_PARENT)
        oz_id = transform.create_path('oz', root)
        transform.create_directory(oz_id)
        transform.version_file('ozzie', oz_id)
        trans_id2 = transform.create_path('name2', root)
        transform.create_file('contents', trans_id2)
        transform.set_executability(False, trans_id2)
        transform.version_file('my_pretties2', trans_id2)
        modified_paths = transform.apply().modified_paths
        self.assertEqual('contents', self.wt.get_file_byname('name').read())
        self.assertEqual(self.wt.path2id('name'), 'my_pretties')
        self.assertIs(self.wt.is_executable('my_pretties'), True)
        self.assertIs(self.wt.is_executable('my_pretties2'), False)
        self.assertEqual('directory', file_kind(self.wt.abspath('oz')))
        self.assertEqual(len(modified_paths), 3)
        tree_mod_paths = [self.wt.id2abspath(f) for f in 
                          ('ozzie', 'my_pretties', 'my_pretties2')]
        self.assertSubset(tree_mod_paths, modified_paths)
        # is it safe to finalize repeatedly?
        transform.finalize()
        transform.finalize()

    def test_convenience(self):
        transform, root = self.get_transform()
        trans_id = transform.new_file('name', root, 'contents', 
                                      'my_pretties', True)
        oz = transform.new_directory('oz', root, 'oz-id')
        dorothy = transform.new_directory('dorothy', oz, 'dorothy-id')
        toto = transform.new_file('toto', dorothy, 'toto-contents', 
                                  'toto-id', False)

        self.assertEqual(len(transform.find_conflicts()), 0)
        transform.apply()
        self.assertRaises(ReusingTransform, transform.find_conflicts)
        self.assertEqual('contents', file(self.wt.abspath('name')).read())
        self.assertEqual(self.wt.path2id('name'), 'my_pretties')
        self.assertIs(self.wt.is_executable('my_pretties'), True)
        self.assertEqual(self.wt.path2id('oz'), 'oz-id')
        self.assertEqual(self.wt.path2id('oz/dorothy'), 'dorothy-id')
        self.assertEqual(self.wt.path2id('oz/dorothy/toto'), 'toto-id')

        self.assertEqual('toto-contents', 
                         self.wt.get_file_byname('oz/dorothy/toto').read())
        self.assertIs(self.wt.is_executable('toto-id'), False)

    def test_conflicts(self):
        transform, root = self.get_transform()
        trans_id = transform.new_file('name', root, 'contents', 
                                      'my_pretties')
        self.assertEqual(len(transform.find_conflicts()), 0)
        trans_id2 = transform.new_file('name', root, 'Crontents', 'toto')
        self.assertEqual(transform.find_conflicts(), 
                         [('duplicate', trans_id, trans_id2, 'name')])
        self.assertRaises(MalformedTransform, transform.apply)
        transform.adjust_path('name', trans_id, trans_id2)
        self.assertEqual(transform.find_conflicts(), 
                         [('non-directory parent', trans_id)])
        tinman_id = transform.trans_id_tree_path('tinman')
        transform.adjust_path('name', tinman_id, trans_id2)
        self.assertEqual(transform.find_conflicts(), 
                         [('unversioned parent', tinman_id), 
                          ('missing parent', tinman_id)])
        lion_id = transform.create_path('lion', root)
        self.assertEqual(transform.find_conflicts(), 
                         [('unversioned parent', tinman_id), 
                          ('missing parent', tinman_id)])
        transform.adjust_path('name', lion_id, trans_id2)
        self.assertEqual(transform.find_conflicts(), 
                         [('unversioned parent', lion_id),
                          ('missing parent', lion_id)])
        transform.version_file("Courage", lion_id)
        self.assertEqual(transform.find_conflicts(), 
                         [('missing parent', lion_id), 
                          ('versioning no contents', lion_id)])
        transform.adjust_path('name2', root, trans_id2)
        self.assertEqual(transform.find_conflicts(), 
                         [('versioning no contents', lion_id)])
        transform.create_file('Contents, okay?', lion_id)
        transform.adjust_path('name2', trans_id2, trans_id2)
        self.assertEqual(transform.find_conflicts(), 
                         [('parent loop', trans_id2), 
                          ('non-directory parent', trans_id2)])
        transform.adjust_path('name2', root, trans_id2)
        oz_id = transform.new_directory('oz', root)
        transform.set_executability(True, oz_id)
        self.assertEqual(transform.find_conflicts(), 
                         [('unversioned executability', oz_id)])
        transform.version_file('oz-id', oz_id)
        self.assertEqual(transform.find_conflicts(), 
                         [('non-file executability', oz_id)])
        transform.set_executability(None, oz_id)
        tip_id = transform.new_file('tip', oz_id, 'ozma', 'tip-id')
        transform.apply()
        self.assertEqual(self.wt.path2id('name'), 'my_pretties')
        self.assertEqual('contents', file(self.wt.abspath('name')).read())
        transform2, root = self.get_transform()
        oz_id = transform2.trans_id_tree_file_id('oz-id')
        newtip = transform2.new_file('tip', oz_id, 'other', 'tip-id')
        result = transform2.find_conflicts()
        fp = FinalPaths(transform2)
        self.assert_('oz/tip' in transform2._tree_path_ids)
        self.assertEqual(fp.get_path(newtip), pathjoin('oz', 'tip'))
        self.assertEqual(len(result), 2)
        self.assertEqual((result[0][0], result[0][1]), 
                         ('duplicate', newtip))
        self.assertEqual((result[1][0], result[1][2]), 
                         ('duplicate id', newtip))
        transform2.finalize()
        transform3 = TreeTransform(self.wt)
        self.addCleanup(transform3.finalize)
        oz_id = transform3.trans_id_tree_file_id('oz-id')
        transform3.delete_contents(oz_id)
        self.assertEqual(transform3.find_conflicts(), 
                         [('missing parent', oz_id)])
        root_id = transform3.trans_id_tree_file_id('TREE_ROOT')
        tip_id = transform3.trans_id_tree_file_id('tip-id')
        transform3.adjust_path('tip', root_id, tip_id)
        transform3.apply()

    def test_add_del(self):
        start, root = self.get_transform()
        start.new_directory('a', root, 'a')
        start.apply()
        transform, root = self.get_transform()
        transform.delete_versioned(transform.trans_id_tree_file_id('a'))
        transform.new_directory('a', root, 'a')
        transform.apply()

    def test_unversioning(self):
        create_tree, root = self.get_transform()
        parent_id = create_tree.new_directory('parent', root, 'parent-id')
        create_tree.new_file('child', parent_id, 'child', 'child-id')
        create_tree.apply()
        unversion = TreeTransform(self.wt)
        self.addCleanup(unversion.finalize)
        parent = unversion.trans_id_tree_path('parent')
        unversion.unversion_file(parent)
        self.assertEqual(unversion.find_conflicts(), 
                         [('unversioned parent', parent_id)])
        file_id = unversion.trans_id_tree_file_id('child-id')
        unversion.unversion_file(file_id)
        unversion.apply()

    def test_name_invariants(self):
        create_tree, root = self.get_transform()
        # prepare tree
        root = create_tree.trans_id_tree_file_id('TREE_ROOT')
        create_tree.new_file('name1', root, 'hello1', 'name1')
        create_tree.new_file('name2', root, 'hello2', 'name2')
        ddir = create_tree.new_directory('dying_directory', root, 'ddir')
        create_tree.new_file('dying_file', ddir, 'goodbye1', 'dfile')
        create_tree.new_file('moving_file', ddir, 'later1', 'mfile')
        create_tree.new_file('moving_file2', root, 'later2', 'mfile2')
        create_tree.apply()

        mangle_tree,root = self.get_transform()
        root = mangle_tree.trans_id_tree_file_id('TREE_ROOT')
        #swap names
        name1 = mangle_tree.trans_id_tree_file_id('name1')
        name2 = mangle_tree.trans_id_tree_file_id('name2')
        mangle_tree.adjust_path('name2', root, name1)
        mangle_tree.adjust_path('name1', root, name2)

        #tests for deleting parent directories 
        ddir = mangle_tree.trans_id_tree_file_id('ddir')
        mangle_tree.delete_contents(ddir)
        dfile = mangle_tree.trans_id_tree_file_id('dfile')
        mangle_tree.delete_versioned(dfile)
        mangle_tree.unversion_file(dfile)
        mfile = mangle_tree.trans_id_tree_file_id('mfile')
        mangle_tree.adjust_path('mfile', root, mfile)

        #tests for adding parent directories
        newdir = mangle_tree.new_directory('new_directory', root, 'newdir')
        mfile2 = mangle_tree.trans_id_tree_file_id('mfile2')
        mangle_tree.adjust_path('mfile2', newdir, mfile2)
        mangle_tree.new_file('newfile', newdir, 'hello3', 'dfile')
        self.assertEqual(mangle_tree.final_file_id(mfile2), 'mfile2')
        self.assertEqual(mangle_tree.final_parent(mfile2), newdir)
        self.assertEqual(mangle_tree.final_file_id(mfile2), 'mfile2')
        mangle_tree.apply()
        self.assertEqual(file(self.wt.abspath('name1')).read(), 'hello2')
        self.assertEqual(file(self.wt.abspath('name2')).read(), 'hello1')
        mfile2_path = self.wt.abspath(pathjoin('new_directory','mfile2'))
        self.assertEqual(mangle_tree.final_parent(mfile2), newdir)
        self.assertEqual(file(mfile2_path).read(), 'later2')
        self.assertEqual(self.wt.id2path('mfile2'), 'new_directory/mfile2')
        self.assertEqual(self.wt.path2id('new_directory/mfile2'), 'mfile2')
        newfile_path = self.wt.abspath(pathjoin('new_directory','newfile'))
        self.assertEqual(file(newfile_path).read(), 'hello3')
        self.assertEqual(self.wt.path2id('dying_directory'), 'ddir')
        self.assertIs(self.wt.path2id('dying_directory/dying_file'), None)
        mfile2_path = self.wt.abspath(pathjoin('new_directory','mfile2'))

    def test_both_rename(self):
        create_tree,root = self.get_transform()
        newdir = create_tree.new_directory('selftest', root, 'selftest-id')
        create_tree.new_file('blackbox.py', newdir, 'hello1', 'blackbox-id')
        create_tree.apply()        
        mangle_tree,root = self.get_transform()
        selftest = mangle_tree.trans_id_tree_file_id('selftest-id')
        blackbox = mangle_tree.trans_id_tree_file_id('blackbox-id')
        mangle_tree.adjust_path('test', root, selftest)
        mangle_tree.adjust_path('test_too_much', root, selftest)
        mangle_tree.set_executability(True, blackbox)
        mangle_tree.apply()

    def test_both_rename2(self):
        create_tree,root = self.get_transform()
        bzrlib = create_tree.new_directory('bzrlib', root, 'bzrlib-id')
        tests = create_tree.new_directory('tests', bzrlib, 'tests-id')
        blackbox = create_tree.new_directory('blackbox', tests, 'blackbox-id')
        create_tree.new_file('test_too_much.py', blackbox, 'hello1', 
                             'test_too_much-id')
        create_tree.apply()        
        mangle_tree,root = self.get_transform()
        bzrlib = mangle_tree.trans_id_tree_file_id('bzrlib-id')
        tests = mangle_tree.trans_id_tree_file_id('tests-id')
        test_too_much = mangle_tree.trans_id_tree_file_id('test_too_much-id')
        mangle_tree.adjust_path('selftest', bzrlib, tests)
        mangle_tree.adjust_path('blackbox.py', tests, test_too_much) 
        mangle_tree.set_executability(True, test_too_much)
        mangle_tree.apply()

    def test_both_rename3(self):
        create_tree,root = self.get_transform()
        tests = create_tree.new_directory('tests', root, 'tests-id')
        create_tree.new_file('test_too_much.py', tests, 'hello1', 
                             'test_too_much-id')
        create_tree.apply()        
        mangle_tree,root = self.get_transform()
        tests = mangle_tree.trans_id_tree_file_id('tests-id')
        test_too_much = mangle_tree.trans_id_tree_file_id('test_too_much-id')
        mangle_tree.adjust_path('selftest', root, tests)
        mangle_tree.adjust_path('blackbox.py', tests, test_too_much) 
        mangle_tree.set_executability(True, test_too_much)
        mangle_tree.apply()

    def test_move_dangling_ie(self):
        create_tree, root = self.get_transform()
        # prepare tree
        root = create_tree.trans_id_tree_file_id('TREE_ROOT')
        create_tree.new_file('name1', root, 'hello1', 'name1')
        create_tree.apply()
        delete_contents, root = self.get_transform()
        file = delete_contents.trans_id_tree_file_id('name1')
        delete_contents.delete_contents(file)
        delete_contents.apply()
        move_id, root = self.get_transform()
        name1 = move_id.trans_id_tree_file_id('name1')
        newdir = move_id.new_directory('dir', root, 'newdir')
        move_id.adjust_path('name2', newdir, name1)
        move_id.apply()
        
    def test_replace_dangling_ie(self):
        create_tree, root = self.get_transform()
        # prepare tree
        root = create_tree.trans_id_tree_file_id('TREE_ROOT')
        create_tree.new_file('name1', root, 'hello1', 'name1')
        create_tree.apply()
        delete_contents = TreeTransform(self.wt)
        self.addCleanup(delete_contents.finalize)
        file = delete_contents.trans_id_tree_file_id('name1')
        delete_contents.delete_contents(file)
        delete_contents.apply()
        delete_contents.finalize()
        replace = TreeTransform(self.wt)
        self.addCleanup(replace.finalize)
        name2 = replace.new_file('name2', root, 'hello2', 'name1')
        conflicts = replace.find_conflicts()
        name1 = replace.trans_id_tree_file_id('name1')
        self.assertEqual(conflicts, [('duplicate id', name1, name2)])
        resolve_conflicts(replace)
        replace.apply()

    def test_symlinks(self):
        if not has_symlinks():
            raise TestSkipped('Symlinks are not supported on this platform')
        transform,root = self.get_transform()
        oz_id = transform.new_directory('oz', root, 'oz-id')
        wizard = transform.new_symlink('wizard', oz_id, 'wizard-target', 
                                       'wizard-id')
        wiz_id = transform.create_path('wizard2', oz_id)
        transform.create_symlink('behind_curtain', wiz_id)
        transform.version_file('wiz-id2', wiz_id)            
        transform.set_executability(True, wiz_id)
        self.assertEqual(transform.find_conflicts(), 
                         [('non-file executability', wiz_id)])
        transform.set_executability(None, wiz_id)
        transform.apply()
        self.assertEqual(self.wt.path2id('oz/wizard'), 'wizard-id')
        self.assertEqual(file_kind(self.wt.abspath('oz/wizard')), 'symlink')
        self.assertEqual(os.readlink(self.wt.abspath('oz/wizard2')), 
                         'behind_curtain')
        self.assertEqual(os.readlink(self.wt.abspath('oz/wizard')),
                         'wizard-target')


    def get_conflicted(self):
        create,root = self.get_transform()
        create.new_file('dorothy', root, 'dorothy', 'dorothy-id')
        oz = create.new_directory('oz', root, 'oz-id')
        create.new_directory('emeraldcity', oz, 'emerald-id')
        create.apply()
        conflicts,root = self.get_transform()
        # set up duplicate entry, duplicate id
        new_dorothy = conflicts.new_file('dorothy', root, 'dorothy', 
                                         'dorothy-id')
        old_dorothy = conflicts.trans_id_tree_file_id('dorothy-id')
        oz = conflicts.trans_id_tree_file_id('oz-id')
        # set up DeletedParent parent conflict
        conflicts.delete_versioned(oz)
        emerald = conflicts.trans_id_tree_file_id('emerald-id')
        # set up MissingParent conflict
        munchkincity = conflicts.trans_id_file_id('munchkincity-id')
        conflicts.adjust_path('munchkincity', root, munchkincity)
        conflicts.new_directory('auntem', munchkincity, 'auntem-id')
        # set up parent loop
        conflicts.adjust_path('emeraldcity', emerald, emerald)
        return conflicts, emerald, oz, old_dorothy, new_dorothy

    def test_conflict_resolution(self):
        conflicts, emerald, oz, old_dorothy, new_dorothy =\
            self.get_conflicted()
        resolve_conflicts(conflicts)
        self.assertEqual(conflicts.final_name(old_dorothy), 'dorothy.moved')
        self.assertIs(conflicts.final_file_id(old_dorothy), None)
        self.assertEqual(conflicts.final_name(new_dorothy), 'dorothy')
        self.assertEqual(conflicts.final_file_id(new_dorothy), 'dorothy-id')
        self.assertEqual(conflicts.final_parent(emerald), oz)
        conflicts.apply()

    def test_cook_conflicts(self):
        tt, emerald, oz, old_dorothy, new_dorothy = self.get_conflicted()
        raw_conflicts = resolve_conflicts(tt)
        cooked_conflicts = cook_conflicts(raw_conflicts, tt)
        duplicate = DuplicateEntry('Moved existing file to', 'dorothy.moved', 
                                   'dorothy', None, 'dorothy-id')
        self.assertEqual(cooked_conflicts[0], duplicate)
        duplicate_id = DuplicateID('Unversioned existing file', 
                                   'dorothy.moved', 'dorothy', None,
                                   'dorothy-id')
        self.assertEqual(cooked_conflicts[1], duplicate_id)
        missing_parent = MissingParent('Created directory', 'munchkincity',
                                       'munchkincity-id')
        deleted_parent = DeletingParent('Not deleting', 'oz', 'oz-id')
        self.assertEqual(cooked_conflicts[2], missing_parent)
        unversioned_parent = UnversionedParent('Versioned directory',
                                               'munchkincity',
                                               'munchkincity-id')
        unversioned_parent2 = UnversionedParent('Versioned directory', 'oz',
                                               'oz-id')
        self.assertEqual(cooked_conflicts[3], unversioned_parent)
        parent_loop = ParentLoop('Cancelled move', 'oz/emeraldcity', 
                                 'oz/emeraldcity', 'emerald-id', 'emerald-id')
        self.assertEqual(cooked_conflicts[4], deleted_parent)
        self.assertEqual(cooked_conflicts[5], unversioned_parent2)
        self.assertEqual(cooked_conflicts[6], parent_loop)
        self.assertEqual(len(cooked_conflicts), 7)
        tt.finalize()

    def test_string_conflicts(self):
        tt, emerald, oz, old_dorothy, new_dorothy = self.get_conflicted()
        raw_conflicts = resolve_conflicts(tt)
        cooked_conflicts = cook_conflicts(raw_conflicts, tt)
        tt.finalize()
        conflicts_s = [str(c) for c in cooked_conflicts]
        self.assertEqual(len(cooked_conflicts), len(conflicts_s))
        self.assertEqual(conflicts_s[0], 'Conflict adding file dorothy.  '
                                         'Moved existing file to '
                                         'dorothy.moved.')
        self.assertEqual(conflicts_s[1], 'Conflict adding id to dorothy.  '
                                         'Unversioned existing file '
                                         'dorothy.moved.')
        self.assertEqual(conflicts_s[2], 'Conflict adding files to'
                                         ' munchkincity.  Created directory.')
        self.assertEqual(conflicts_s[3], 'Conflict because munchkincity is not'
                                         ' versioned, but has versioned'
                                         ' children.  Versioned directory.')
        self.assertEqualDiff(conflicts_s[4], "Conflict: can't delete oz because it"
                                         " is not empty.  Not deleting.")
        self.assertEqual(conflicts_s[5], 'Conflict because oz is not'
                                         ' versioned, but has versioned'
                                         ' children.  Versioned directory.')
        self.assertEqual(conflicts_s[6], 'Conflict moving oz/emeraldcity into'
                                         ' oz/emeraldcity.  Cancelled move.')

    def test_moving_versioned_directories(self):
        create, root = self.get_transform()
        kansas = create.new_directory('kansas', root, 'kansas-id')
        create.new_directory('house', kansas, 'house-id')
        create.new_directory('oz', root, 'oz-id')
        create.apply()
        cyclone, root = self.get_transform()
        oz = cyclone.trans_id_tree_file_id('oz-id')
        house = cyclone.trans_id_tree_file_id('house-id')
        cyclone.adjust_path('house', oz, house)
        cyclone.apply()

    def test_moving_root(self):
        create, root = self.get_transform()
        fun = create.new_directory('fun', root, 'fun-id')
        create.new_directory('sun', root, 'sun-id')
        create.new_directory('moon', root, 'moon')
        create.apply()
        transform, root = self.get_transform()
        transform.adjust_root_path('oldroot', fun)
        new_root=transform.trans_id_tree_path('')
        transform.version_file('new-root', new_root)
        transform.apply()

    def test_renames(self):
        create, root = self.get_transform()
        old = create.new_directory('old-parent', root, 'old-id')
        intermediate = create.new_directory('intermediate', old, 'im-id')
        myfile = create.new_file('myfile', intermediate, 'myfile-text',
                                 'myfile-id')
        create.apply()
        rename, root = self.get_transform()
        old = rename.trans_id_file_id('old-id')
        rename.adjust_path('new', root, old)
        myfile = rename.trans_id_file_id('myfile-id')
        rename.set_executability(True, myfile)
        rename.apply()

    def test_find_interesting(self):
        create, root = self.get_transform()
        wt = create._tree
        create.new_file('vfile', root, 'myfile-text', 'myfile-id')
        create.new_file('uvfile', root, 'othertext')
        create.apply()
        self.assertEqual(find_interesting(wt, wt, ['vfile']),
                         set(['myfile-id']))
        self.assertRaises(PathsNotVersionedError, find_interesting, wt, wt,
                          ['uvfile'])

    def test_set_executability_order(self):
        """Ensure that executability behaves the same, no matter what order.
        
        - create file and set executability simultaneously
        - create file and set executability afterward
        - unsetting the executability of a file whose executability has not been
        declared should throw an exception (this may happen when a
        merge attempts to create a file with a duplicate ID)
        """
        transform, root = self.get_transform()
        wt = transform._tree
        transform.new_file('set_on_creation', root, 'Set on creation', 'soc',
                           True)
        sac = transform.new_file('set_after_creation', root, 'Set after creation', 'sac')
        transform.set_executability(True, sac)
        uws = transform.new_file('unset_without_set', root, 'Unset badly', 'uws')
        self.assertRaises(KeyError, transform.set_executability, None, uws)
        transform.apply()
        self.assertTrue(wt.is_executable('soc'))
        self.assertTrue(wt.is_executable('sac'))

    def test_preserve_mode(self):
        """File mode is preserved when replacing content"""
        if sys.platform == 'win32':
            raise TestSkipped('chmod has no effect on win32')
        transform, root = self.get_transform()
        transform.new_file('file1', root, 'contents', 'file1-id', True)
        transform.apply()
        self.assertTrue(self.wt.is_executable('file1-id'))
        transform, root = self.get_transform()
        file1_id = transform.trans_id_tree_file_id('file1-id')
        transform.delete_contents(file1_id)
        transform.create_file('contents2', file1_id)
        transform.apply()
        self.assertTrue(self.wt.is_executable('file1-id'))

    def test__set_mode_stats_correctly(self):
        """_set_mode stats to determine file mode."""
        if sys.platform == 'win32':
            raise TestSkipped('chmod has no effect on win32')

        stat_paths = []
        real_stat = os.stat
        def instrumented_stat(path):
            stat_paths.append(path)
            return real_stat(path)

        transform, root = self.get_transform()

        bar1_id = transform.new_file('bar', root, 'bar contents 1\n',
                                     file_id='bar-id-1', executable=False)
        transform.apply()

        transform, root = self.get_transform()
        bar1_id = transform.trans_id_tree_path('bar')
        bar2_id = transform.trans_id_tree_path('bar2')
        try:
            os.stat = instrumented_stat
            transform.create_file('bar2 contents\n', bar2_id, mode_id=bar1_id)
        finally:
            os.stat = real_stat
            transform.finalize()

        bar1_abspath = self.wt.abspath('bar')
        self.assertEqual([bar1_abspath], stat_paths)


class TransformGroup(object):
    def __init__(self, dirname):
        self.name = dirname
        os.mkdir(dirname)
        self.wt = BzrDir.create_standalone_workingtree(dirname)
        self.b = self.wt.branch
        self.tt = TreeTransform(self.wt)
        self.root = self.tt.trans_id_tree_file_id(self.wt.get_root_id())

def conflict_text(tree, merge):
    template = '%s TREE\n%s%s\n%s%s MERGE-SOURCE\n'
    return template % ('<' * 7, tree, '=' * 7, merge, '>' * 7)


class TestTransformMerge(TestCaseInTempDir):
    def test_text_merge(self):
        base = TransformGroup("base")
        base.tt.new_file('a', base.root, 'a\nb\nc\nd\be\n', 'a')
        base.tt.new_file('b', base.root, 'b1', 'b')
        base.tt.new_file('c', base.root, 'c', 'c')
        base.tt.new_file('d', base.root, 'd', 'd')
        base.tt.new_file('e', base.root, 'e', 'e')
        base.tt.new_file('f', base.root, 'f', 'f')
        base.tt.new_directory('g', base.root, 'g')
        base.tt.new_directory('h', base.root, 'h')
        base.tt.apply()
        other = TransformGroup("other")
        other.tt.new_file('a', other.root, 'y\nb\nc\nd\be\n', 'a')
        other.tt.new_file('b', other.root, 'b2', 'b')
        other.tt.new_file('c', other.root, 'c2', 'c')
        other.tt.new_file('d', other.root, 'd', 'd')
        other.tt.new_file('e', other.root, 'e2', 'e')
        other.tt.new_file('f', other.root, 'f', 'f')
        other.tt.new_file('g', other.root, 'g', 'g')
        other.tt.new_file('h', other.root, 'h\ni\nj\nk\n', 'h')
        other.tt.new_file('i', other.root, 'h\ni\nj\nk\n', 'i')
        other.tt.apply()
        this = TransformGroup("this")
        this.tt.new_file('a', this.root, 'a\nb\nc\nd\bz\n', 'a')
        this.tt.new_file('b', this.root, 'b', 'b')
        this.tt.new_file('c', this.root, 'c', 'c')
        this.tt.new_file('d', this.root, 'd2', 'd')
        this.tt.new_file('e', this.root, 'e2', 'e')
        this.tt.new_file('f', this.root, 'f', 'f')
        this.tt.new_file('g', this.root, 'g', 'g')
        this.tt.new_file('h', this.root, '1\n2\n3\n4\n', 'h')
        this.tt.new_file('i', this.root, '1\n2\n3\n4\n', 'i')
        this.tt.apply()
        Merge3Merger(this.wt, this.wt, base.wt, other.wt)
        # textual merge
        self.assertEqual(this.wt.get_file('a').read(), 'y\nb\nc\nd\bz\n')
        # three-way text conflict
        self.assertEqual(this.wt.get_file('b').read(), 
                         conflict_text('b', 'b2'))
        # OTHER wins
        self.assertEqual(this.wt.get_file('c').read(), 'c2')
        # THIS wins
        self.assertEqual(this.wt.get_file('d').read(), 'd2')
        # Ambigious clean merge
        self.assertEqual(this.wt.get_file('e').read(), 'e2')
        # No change
        self.assertEqual(this.wt.get_file('f').read(), 'f')
        # Correct correct results when THIS == OTHER 
        self.assertEqual(this.wt.get_file('g').read(), 'g')
        # Text conflict when THIS & OTHER are text and BASE is dir
        self.assertEqual(this.wt.get_file('h').read(), 
                         conflict_text('1\n2\n3\n4\n', 'h\ni\nj\nk\n'))
        self.assertEqual(this.wt.get_file_byname('h.THIS').read(),
                         '1\n2\n3\n4\n')
        self.assertEqual(this.wt.get_file_byname('h.OTHER').read(),
                         'h\ni\nj\nk\n')
        self.assertEqual(file_kind(this.wt.abspath('h.BASE')), 'directory')
        self.assertEqual(this.wt.get_file('i').read(), 
                         conflict_text('1\n2\n3\n4\n', 'h\ni\nj\nk\n'))
        self.assertEqual(this.wt.get_file_byname('i.THIS').read(),
                         '1\n2\n3\n4\n')
        self.assertEqual(this.wt.get_file_byname('i.OTHER').read(),
                         'h\ni\nj\nk\n')
        self.assertEqual(os.path.exists(this.wt.abspath('i.BASE')), False)
        modified = ['a', 'b', 'c', 'h', 'i']
        merge_modified = this.wt.merge_modified()
        self.assertSubset(merge_modified, modified)
        self.assertEqual(len(merge_modified), len(modified))
        file(this.wt.id2abspath('a'), 'wb').write('booga')
        modified.pop(0)
        merge_modified = this.wt.merge_modified()
        self.assertSubset(merge_modified, modified)
        self.assertEqual(len(merge_modified), len(modified))
        this.wt.remove('b')
        this.wt.revert([])

    def test_file_merge(self):
        if not has_symlinks():
            raise TestSkipped('Symlinks are not supported on this platform')
        base = TransformGroup("BASE")
        this = TransformGroup("THIS")
        other = TransformGroup("OTHER")
        for tg in this, base, other:
            tg.tt.new_directory('a', tg.root, 'a')
            tg.tt.new_symlink('b', tg.root, 'b', 'b')
            tg.tt.new_file('c', tg.root, 'c', 'c')
            tg.tt.new_symlink('d', tg.root, tg.name, 'd')
        targets = ((base, 'base-e', 'base-f', None, None), 
                   (this, 'other-e', 'this-f', 'other-g', 'this-h'), 
                   (other, 'other-e', None, 'other-g', 'other-h'))
        for tg, e_target, f_target, g_target, h_target in targets:
            for link, target in (('e', e_target), ('f', f_target), 
                                 ('g', g_target), ('h', h_target)):
                if target is not None:
                    tg.tt.new_symlink(link, tg.root, target, link)

        for tg in this, base, other:
            tg.tt.apply()
        Merge3Merger(this.wt, this.wt, base.wt, other.wt)
        self.assertIs(os.path.isdir(this.wt.abspath('a')), True)
        self.assertIs(os.path.islink(this.wt.abspath('b')), True)
        self.assertIs(os.path.isfile(this.wt.abspath('c')), True)
        for suffix in ('THIS', 'BASE', 'OTHER'):
            self.assertEqual(os.readlink(this.wt.abspath('d.'+suffix)), suffix)
        self.assertIs(os.path.lexists(this.wt.abspath('d')), False)
        self.assertEqual(this.wt.id2path('d'), 'd.OTHER')
        self.assertEqual(this.wt.id2path('f'), 'f.THIS')
        self.assertEqual(os.readlink(this.wt.abspath('e')), 'other-e')
        self.assertIs(os.path.lexists(this.wt.abspath('e.THIS')), False)
        self.assertIs(os.path.lexists(this.wt.abspath('e.OTHER')), False)
        self.assertIs(os.path.lexists(this.wt.abspath('e.BASE')), False)
        self.assertIs(os.path.lexists(this.wt.abspath('g')), True)
        self.assertIs(os.path.lexists(this.wt.abspath('g.BASE')), False)
        self.assertIs(os.path.lexists(this.wt.abspath('h')), False)
        self.assertIs(os.path.lexists(this.wt.abspath('h.BASE')), False)
        self.assertIs(os.path.lexists(this.wt.abspath('h.THIS')), True)
        self.assertIs(os.path.lexists(this.wt.abspath('h.OTHER')), True)

    def test_filename_merge(self):
        base = TransformGroup("BASE")
        this = TransformGroup("THIS")
        other = TransformGroup("OTHER")
        base_a, this_a, other_a = [t.tt.new_directory('a', t.root, 'a') 
                                   for t in [base, this, other]]
        base_b, this_b, other_b = [t.tt.new_directory('b', t.root, 'b') 
                                   for t in [base, this, other]]
        base.tt.new_directory('c', base_a, 'c')
        this.tt.new_directory('c1', this_a, 'c')
        other.tt.new_directory('c', other_b, 'c')

        base.tt.new_directory('d', base_a, 'd')
        this.tt.new_directory('d1', this_b, 'd')
        other.tt.new_directory('d', other_a, 'd')

        base.tt.new_directory('e', base_a, 'e')
        this.tt.new_directory('e', this_a, 'e')
        other.tt.new_directory('e1', other_b, 'e')

        base.tt.new_directory('f', base_a, 'f')
        this.tt.new_directory('f1', this_b, 'f')
        other.tt.new_directory('f1', other_b, 'f')

        for tg in [this, base, other]:
            tg.tt.apply()
        Merge3Merger(this.wt, this.wt, base.wt, other.wt)
        self.assertEqual(this.wt.id2path('c'), pathjoin('b/c1'))
        self.assertEqual(this.wt.id2path('d'), pathjoin('b/d1'))
        self.assertEqual(this.wt.id2path('e'), pathjoin('b/e1'))
        self.assertEqual(this.wt.id2path('f'), pathjoin('b/f1'))

    def test_filename_merge_conflicts(self):
        base = TransformGroup("BASE")
        this = TransformGroup("THIS")
        other = TransformGroup("OTHER")
        base_a, this_a, other_a = [t.tt.new_directory('a', t.root, 'a') 
                                   for t in [base, this, other]]
        base_b, this_b, other_b = [t.tt.new_directory('b', t.root, 'b') 
                                   for t in [base, this, other]]

        base.tt.new_file('g', base_a, 'g', 'g')
        other.tt.new_file('g1', other_b, 'g1', 'g')

        base.tt.new_file('h', base_a, 'h', 'h')
        this.tt.new_file('h1', this_b, 'h1', 'h')

        base.tt.new_file('i', base.root, 'i', 'i')
        other.tt.new_directory('i1', this_b, 'i')

        for tg in [this, base, other]:
            tg.tt.apply()
        Merge3Merger(this.wt, this.wt, base.wt, other.wt)

        self.assertEqual(this.wt.id2path('g'), pathjoin('b/g1.OTHER'))
        self.assertIs(os.path.lexists(this.wt.abspath('b/g1.BASE')), True)
        self.assertIs(os.path.lexists(this.wt.abspath('b/g1.THIS')), False)
        self.assertEqual(this.wt.id2path('h'), pathjoin('b/h1.THIS'))
        self.assertIs(os.path.lexists(this.wt.abspath('b/h1.BASE')), True)
        self.assertIs(os.path.lexists(this.wt.abspath('b/h1.OTHER')), False)
        self.assertEqual(this.wt.id2path('i'), pathjoin('b/i1.OTHER'))


class TestBuildTree(tests.TestCaseWithTransport):

    def test_build_tree(self):
        if not has_symlinks():
            raise TestSkipped('Test requires symlink support')
        os.mkdir('a')
        a = BzrDir.create_standalone_workingtree('a')
        os.mkdir('a/foo')
        file('a/foo/bar', 'wb').write('contents')
        os.symlink('a/foo/bar', 'a/foo/baz')
        a.add(['foo', 'foo/bar', 'foo/baz'])
        a.commit('initial commit')
        b = BzrDir.create_standalone_workingtree('b')
        build_tree(a.basis_tree(), b)
        self.assertIs(os.path.isdir('b/foo'), True)
        self.assertEqual(file('b/foo/bar', 'rb').read(), "contents")
        self.assertEqual(os.readlink('b/foo/baz'), 'a/foo/bar')

    def test_file_conflict_handling(self):
        """Ensure that when building trees, conflict handling is done"""
        source = self.make_branch_and_tree('source')
        target = self.make_branch_and_tree('target')
        self.build_tree(['source/file', 'target/file'])
        source.add('file', 'new-file')
        source.commit('added file')
        build_tree(source.basis_tree(), target)
        self.assertEqual([DuplicateEntry('Moved existing file to',
                          'file.moved', 'file', None, 'new-file')],
                         target.conflicts())
        target2 = self.make_branch_and_tree('target2')
        target_file = file('target2/file', 'wb')
        try:
            source_file = file('source/file', 'rb')
            try:
                target_file.write(source_file.read())
            finally:
                source_file.close()
        finally:
            target_file.close()
        build_tree(source.basis_tree(), target2)
        self.assertEqual([], target2.conflicts())

    def test_symlink_conflict_handling(self):
        """Ensure that when building trees, conflict handling is done"""
        if not has_symlinks():
            raise TestSkipped('Test requires symlink support')
        source = self.make_branch_and_tree('source')
        os.symlink('foo', 'source/symlink')
        source.add('symlink', 'new-symlink')
        source.commit('added file')
        target = self.make_branch_and_tree('target')
        os.symlink('bar', 'target/symlink')
        build_tree(source.basis_tree(), target)
        self.assertEqual([DuplicateEntry('Moved existing file to',
            'symlink.moved', 'symlink', None, 'new-symlink')],
            target.conflicts())
        target = self.make_branch_and_tree('target2')
        os.symlink('foo', 'target2/symlink')
        build_tree(source.basis_tree(), target)
        self.assertEqual([], target.conflicts())
        
    def test_directory_conflict_handling(self):
        """Ensure that when building trees, conflict handling is done"""
        source = self.make_branch_and_tree('source')
        target = self.make_branch_and_tree('target')
        self.build_tree(['source/dir1/', 'source/dir1/file', 'target/dir1/'])
        source.add(['dir1', 'dir1/file'], ['new-dir1', 'new-file'])
        source.commit('added file')
        build_tree(source.basis_tree(), target)
        self.assertEqual([], target.conflicts())
        self.failUnlessExists('target/dir1/file')

        # Ensure contents are merged
        target = self.make_branch_and_tree('target2')
        self.build_tree(['target2/dir1/', 'target2/dir1/file2'])
        build_tree(source.basis_tree(), target)
        self.assertEqual([], target.conflicts())
        self.failUnlessExists('target2/dir1/file2')
        self.failUnlessExists('target2/dir1/file')

        # Ensure new contents are suppressed for existing branches
        target = self.make_branch_and_tree('target3')
        self.make_branch('target3/dir1')
        self.build_tree(['target3/dir1/file2'])
        build_tree(source.basis_tree(), target)
        self.failIfExists('target3/dir1/file')
        self.failUnlessExists('target3/dir1/file2')
        self.failUnlessExists('target3/dir1.diverted/file')
        self.assertEqual([DuplicateEntry('Diverted to',
            'dir1.diverted', 'dir1', 'new-dir1', None)],
            target.conflicts())

        target = self.make_branch_and_tree('target4')
        self.build_tree(['target4/dir1/'])
        self.make_branch('target4/dir1/file')
        build_tree(source.basis_tree(), target)
        self.failUnlessExists('target4/dir1/file')
        self.assertEqual('directory', file_kind('target4/dir1/file'))
        self.failUnlessExists('target4/dir1/file.diverted')
        self.assertEqual([DuplicateEntry('Diverted to',
            'dir1/file.diverted', 'dir1/file', 'new-file', None)],
            target.conflicts())

    def test_mixed_conflict_handling(self):
        """Ensure that when building trees, conflict handling is done"""
        source = self.make_branch_and_tree('source')
        target = self.make_branch_and_tree('target')
        self.build_tree(['source/name', 'target/name/'])
        source.add('name', 'new-name')
        source.commit('added file')
        build_tree(source.basis_tree(), target)
        self.assertEqual([DuplicateEntry('Moved existing file to',
            'name.moved', 'name', None, 'new-name')], target.conflicts())

    def test_raises_in_populated(self):
        source = self.make_branch_and_tree('source')
        self.build_tree(['source/name'])
        source.add('name')
        source.commit('added name')
        target = self.make_branch_and_tree('target')
        self.build_tree(['target/name'])
        target.add('name')
        self.assertRaises(AssertionError, build_tree, source.basis_tree(),
                          target)


class MockTransform(object):

    def has_named_child(self, by_parent, parent_id, name):
        for child_id in by_parent[parent_id]:
            if child_id == '0':
                if name == "name~":
                    return True
            elif name == "name.~%s~" % child_id:
                return True
        return False

class MockEntry(object):
    def __init__(self):
        object.__init__(self)
        self.name = "name"

class TestGetBackupName(TestCase):
    def test_get_backup_name(self):
        tt = MockTransform()
        name = get_backup_name(MockEntry(), {'a':[]}, 'a', tt)
        self.assertEqual(name, 'name.~1~')
        name = get_backup_name(MockEntry(), {'a':['1']}, 'a', tt)
        self.assertEqual(name, 'name.~2~')
        name = get_backup_name(MockEntry(), {'a':['2']}, 'a', tt)
        self.assertEqual(name, 'name.~1~')
        name = get_backup_name(MockEntry(), {'a':['2'], 'b':[]}, 'b', tt)
        self.assertEqual(name, 'name.~1~')
        name = get_backup_name(MockEntry(), {'a':['1', '2', '3']}, 'a', tt)
        self.assertEqual(name, 'name.~4~')