/brz/remove-bazaar : contents of breezy/tests/per_intertree/test

: (revision 7213)

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# Copyright (C) 2006, 2007 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Tests for the InterTree.compare() function."""

import os
import shutil

from breezy import (
    errors,
    mutabletree,
    tests,
    transform,
    )
from breezy.osutils import has_symlinks
from breezy.tests.per_intertree import TestCaseWithTwoTrees
from breezy.tests import (
    features,
    )

# TODO: test the include_root option.
# TODO: test that renaming a directory x->y does not emit a rename for the
#       child x/a->y/a.
# TODO: test that renaming a directory x-> does not emit a rename for the child
#        x/a -> y/a when a supplied_files argument gives either 'x/' or 'y/a'
#        -> that is, when the renamed parent is not processed by the function.
# TODO: test items are only emitted once when a specific_files list names a dir
#       whose parent is now a child.
# TODO: test comparisons between trees with different root ids. mbp 20070301
#
# TODO: More comparisons between trees with subtrees in different states.
#
# TODO: Many tests start out by setting the tree roots ids the same, maybe
#       that should just be the default for these tests, by changing
#       make_branch_and_tree.  mbp 20070307


def _change_key(change):
    """Return a valid key for sorting Tree.iter_changes entries."""
    (file_id, paths, content_changed, versioned, parent, name, kind,
     executable) = change
    return (file_id or b'', (paths[0] or '', paths[1] or ''), versioned,
            parent, name, kind, executable)


class TestCompare(TestCaseWithTwoTrees):

    def _make_abc_tree(self, tree):
        """setup an abc content tree."""
        files = ['a', 'b/', 'b/c']
        self.build_tree(files, line_endings='binary',
                        transport=tree.controldir.root_transport)
        tree.set_root_id(b'root-id')
        tree.add(files, [b'a-id', b'b-id', b'c-id'])

    def get_tree_no_parents_abc_content(self, tree, converter=None):
        """return a test tree with a, b/, b/c contents."""
        self._make_abc_tree(tree)
        return self._convert_tree(tree, converter)

    def test_compare_empty_trees(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_no_content(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare()
        self.assertEqual([], d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_empty_to_abc_content(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare()
        self.assertEqual([('a', b'a-id', 'file'),
                          ('b', b'b-id', 'directory'),
                          ('b/c', b'c-id', 'file'),
                          ], d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_dangling(self):
        # This test depends on the ability for some trees to have a difference
        # between a 'versioned present' and 'versioned not present' (aka
        # dangling) file. In this test there are two trees each with a separate
        # dangling file, and the dangling files should be considered absent for
        # the test.
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['2/a'])
        tree2.add('a')
        os.unlink('2/a')
        self.build_tree(['1/b'])
        tree1.add('b')
        os.unlink('1/b')
        # the conversion to test trees here will leave the trees intact for the
        # default intertree, but may perform a commit for other tree types,
        # which may reduce the validity of the test. XXX: Think about how to
        # address this.
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare()
        self.assertEqual([], d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_abc_content_to_empty(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_no_content(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare()
        self.assertEqual([], d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([('a', tree1.path2id('a'), 'file'),
                          ('b', tree1.path2id('b'), 'directory'),
                          ('b/c', tree1.path2id('b/c'), 'file'),
                          ], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_content_modification(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_2(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare()
        self.assertEqual([], d.added)
        self.assertEqual(
            [('a', tree1.path2id('a'), 'file', True, False)], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_meta_modification(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_3(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare()
        self.assertEqual([], d.added)
        self.assertEqual(
            [('b/c', tree1.path2id('b/c'), 'file', False, True)], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_file_rename(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_4(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare()
        self.assertEqual([], d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual(
            [('a', 'd', tree1.path2id('a'), 'file', False, False)], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_file_rename_and_modification(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_5(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare()
        self.assertEqual([], d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual(
            [('a', 'd', tree1.path2id('a'), 'file', True, False)], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_file_rename_and_meta_modification(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_6(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare()
        self.assertEqual([], d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual(
            [('b/c', 'e', tree1.path2id('b/c'), 'file', False, True)], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_empty_to_abc_content_a_only(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare(specific_files=['a'])
        self.assertEqual([('a', tree2.path2id('a'), 'file')], d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_empty_to_abc_content_a_and_c_only(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare(
            specific_files=['a', 'b/c'])
        self.assertEqual(
            [('a', tree2.path2id('a'), 'file'),
             (u'b', tree2.path2id('b'), 'directory'),
             ('b/c', tree2.path2id('b/c'), 'file')],
            d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_empty_to_abc_content_c_only(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare(
            specific_files=['b/c'])
        self.assertEqual(
            [(u'b', b'b-id', 'directory'), ('b/c', b'c-id', 'file')], d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_empty_to_abc_content_b_only(self):
        """Restricting to a dir matches the children of the dir."""
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare(specific_files=['b'])
        self.assertEqual(
            [('b', b'b-id', 'directory'), ('b/c', b'c-id', 'file')],
            d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_unchanged_with_renames_and_modifications(self):
        """want_unchanged should generate a list of unchanged entries."""
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_5(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare(want_unchanged=True)
        self.assertEqual([], d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([('a', 'd', b'a-id', 'file', True, False)], d.renamed)
        self.assertEqual(
            [(u'b', b'b-id', 'directory'), (u'b/c', b'c-id', 'file')],
            d.unchanged)

    def test_extra_trees_finds_ids(self):
        """Ask for a delta between two trees with a path present in a third."""
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_3(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare(specific_files=['b'])
        # the type of tree-3 does not matter - it is used as a lookup, not
        # a dispatch. XXX: For dirstate it does speak to the optimisability of
        # the lookup, in merged trees it can be fast-pathed. We probably want
        # two tests: one as is, and one with it as a pending merge.
        tree3 = self.make_branch_and_tree('3')
        tree3 = self.get_tree_no_parents_abc_content_6(tree3)
        tree3.lock_read()
        self.addCleanup(tree3.unlock)
        # tree 3 has 'e' which is b'c-id'. Tree 1 has c-id at b/c, and Tree 2
        # has c-id at b/c with its exec flag toggled.
        # without extra_trees, we should get no modifications from this
        # so do one, to be sure the test is valid.
        d = self.intertree_class(tree1, tree2).compare(
            specific_files=['e'])
        self.assertEqual([], d.modified)
        # now give it an additional lookup:
        d = self.intertree_class(tree1, tree2).compare(
            specific_files=['e'], extra_trees=[tree3])
        self.assertEqual([], d.added)
        self.assertEqual([('b/c', b'c-id', 'file', False, True)], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)

    def test_require_versioned(self):
        # this does not quite robustly test, as it is passing in missing paths
        # rather than present-but-not-versioned paths. At the moment there is
        # no mechanism for managing the test trees (which are readonly) to
        # get present-but-not-versioned files for trees that can do that.
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        self.assertRaises(errors.PathsNotVersionedError,
                          self.intertree_class(tree1, tree2).compare,
                          specific_files=['d'],
                          require_versioned=True)

    def test_default_ignores_unversioned_files(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree1/a', 'tree1/c',
                         'tree2/a', 'tree2/b', 'tree2/c'])
        tree1.add(['a', 'c'], [b'a-id', b'c-id'])
        tree2.add(['a', 'c'], [b'a-id', b'c-id'])

        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        d = self.intertree_class(tree1, tree2).compare()
        self.assertEqual([], d.added)
        self.assertEqual([(u'a', b'a-id', 'file', True, False),
                          (u'c', b'c-id', 'file', True, False)], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)
        self.assertEqual([], d.unversioned)

    def test_unversioned_paths_in_tree(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree2/file', 'tree2/dir/'])
        if has_symlinks():
            os.symlink('target', 'tree2/link')
            links_supported = True
        else:
            links_supported = False
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        self.not_applicable_if_cannot_represent_unversioned(tree2)
        d = self.intertree_class(tree1, tree2).compare(want_unversioned=True)
        self.assertEqual([], d.added)
        self.assertEqual([], d.modified)
        self.assertEqual([], d.removed)
        self.assertEqual([], d.renamed)
        self.assertEqual([], d.unchanged)
        expected_unversioned = [(u'dir', None, 'directory'),
                                (u'file', None, 'file')]
        if links_supported:
            expected_unversioned.append((u'link', None, 'symlink'))
        self.assertEqual(expected_unversioned, d.unversioned)


class TestIterChanges(TestCaseWithTwoTrees):
    """Test the comparison iterator"""

    def _make_abc_tree(self, tree):
        """setup an abc content tree."""
        files = ['a', 'b/', 'b/c']
        self.build_tree(files, line_endings='binary',
                        transport=tree.controldir.root_transport)
        tree.set_root_id(b'root-id')
        tree.add(files, [b'a-id', b'b-id', b'c-id'])

    def get_tree_no_parents_abc_content(self, tree, converter=None):
        """return a test tree with a, b/, b/c contents."""
        self._make_abc_tree(tree)
        return self._convert_tree(tree, converter)

    def get_tree_no_parents_abc_content_7(self, tree, converter=None):
        """return a test tree with a, b/, d/e contents.

        This variation adds a dir 'd' (b'd-id'), renames b to d/e.
        """
        self._make_abc_tree(tree)
        self.build_tree(['d/'], transport=tree.controldir.root_transport)
        tree.add(['d'], [b'd-id'])
        tt = transform.TreeTransform(tree)
        trans_id = tt.trans_id_tree_path('b')
        parent_trans_id = tt.trans_id_tree_path('d')
        tt.adjust_path('e', parent_trans_id, trans_id)
        tt.apply()
        return self._convert_tree(tree, converter)

    def assertEqualIterChanges(self, left_changes, right_changes):
        """Assert that left_changes == right_changes.

        :param left_changes: A list of the output from iter_changes.
        :param right_changes: A list of the output from iter_changes.
        """
        left_changes = self.sorted(left_changes)
        right_changes = self.sorted(right_changes)
        if left_changes == right_changes:
            return
        # setify to get item by item differences, but we can only do this
        # when all the ids are unique on both sides.
        left_dict = dict((item[0], item) for item in left_changes)
        right_dict = dict((item[0], item) for item in right_changes)
        if (len(left_dict) != len(left_changes)
                or len(right_dict) != len(right_changes)):
            # Can't do a direct comparison. We could do a sequence diff, but
            # for now just do a regular assertEqual for now.
            self.assertEqual(left_changes, right_changes)
        keys = set(left_dict).union(set(right_dict))
        different = []
        same = []
        for key in keys:
            left_item = left_dict.get(key)
            right_item = right_dict.get(key)
            if left_item == right_item:
                same.append(str(left_item))
            else:
                different.append(" %s\n %s" % (left_item, right_item))
        self.fail("iter_changes output different. Unchanged items:\n"
                  + "\n".join(same) + "\nChanged items:\n" + "\n".join(different))

    def do_iter_changes(self, tree1, tree2, **extra_args):
        """Helper to run iter_changes from tree1 to tree2.

        :param tree1, tree2:  The source and target trees. These will be locked
            automatically.
        :param **extra_args: Extra args to pass to iter_changes. This is not
            inspected by this test helper.
        """
        with tree1.lock_read(), tree2.lock_read():
            # sort order of output is not strictly defined
            return self.sorted(self.intertree_class(tree1, tree2)
                               .iter_changes(**extra_args))

    def check_has_changes(self, expected, tree1, tree2):
        # has_changes is defined for mutable trees only
        if not isinstance(tree2, mutabletree.MutableTree):
            if isinstance(tree1, mutabletree.MutableTree):
                # Let's switch the trees since has_changes() is commutative
                # (where we can apply it)
                tree2, tree1 = tree1, tree2
            else:
                # Neither tree can be used
                return
        with tree1.lock_read(), tree2.lock_read():
            return tree2.has_changes(tree1)

    def mutable_trees_to_locked_test_trees(self, tree1, tree2):
        """Convert the working trees into test trees.

        Read lock them, and add the unlock to the cleanup.
        """
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        tree1.lock_read()
        self.addCleanup(tree1.unlock)
        tree2.lock_read()
        self.addCleanup(tree2.unlock)
        return tree1, tree2

    def make_tree_with_special_names(self):
        """Create a tree with filenames chosen to exercise the walk order."""
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        paths, path_ids = self._create_special_names(tree2, 'tree2')
        tree2.commit('initial', rev_id=b'rev-1')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        return (tree1, tree2, paths, path_ids)

    def make_trees_with_special_names(self):
        """Both trees will use the special names.

        But the contents will differ for each file.
        """
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        paths, path_ids = self._create_special_names(tree1, 'tree1')
        paths, path_ids = self._create_special_names(tree2, 'tree2')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        return (tree1, tree2, paths, path_ids)

    def _create_special_names(self, tree, base_path):
        """Create a tree with paths that expose differences in sort orders."""
        # Each directory will have a single file named 'f' inside
        dirs = ['a',
                'a-a',
                'a/a',
                'a/a-a',
                'a/a/a',
                'a/a/a-a',
                'a/a/a/a',
                'a/a/a/a-a',
                'a/a/a/a/a',
                ]
        with_slashes = []
        paths = []
        path_ids = []
        for d in dirs:
            with_slashes.append(base_path + '/' + d + '/')
            with_slashes.append(base_path + '/' + d + '/f')
            paths.append(d)
            paths.append(d + '/f')
            path_ids.append((d.replace('/', '_') + '-id').encode('ascii'))
            path_ids.append((d.replace('/', '_') + '_f-id').encode('ascii'))
        self.build_tree(with_slashes)
        tree.add(paths, path_ids)
        return paths, path_ids

    def test_compare_empty_trees(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_no_content(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        self.assertEqual([], self.do_iter_changes(tree1, tree2))
        self.check_has_changes(False, tree1, tree2)

    def added(self, tree, file_id):
        path, entry = self.get_path_entry(tree, file_id)
        return (file_id, (None, path), True, (False, True), (None, entry.parent_id),
                (None, entry.name), (None, entry.kind),
                (None, entry.executable))

    @staticmethod
    def get_path_entry(tree, file_id):
        with tree.lock_read():
            path = tree.id2path(file_id)
        iterator = tree.iter_entries_by_dir(specific_files=[path])
        try:
            return next(iterator)
        except StopIteration:
            raise KeyError(file_id)

    def content_changed(self, tree, file_id):
        path, entry = self.get_path_entry(tree, file_id)
        return (file_id, (path, path), True, (True, True),
                (entry.parent_id, entry.parent_id),
                (entry.name, entry.name), (entry.kind, entry.kind),
                (entry.executable, entry.executable))

    def kind_changed(self, from_tree, to_tree, file_id):
        from_path, old_entry = self.get_path_entry(from_tree, file_id)
        path, new_entry = self.get_path_entry(to_tree, file_id)
        return (file_id, (from_path, path), True, (True, True),
                (old_entry.parent_id, new_entry.parent_id),
                (old_entry.name, new_entry.name),
                (old_entry.kind, new_entry.kind),
                (old_entry.executable, new_entry.executable))

    def missing(self, file_id, from_path, to_path, parent_id, kind):
        _, from_basename = os.path.split(from_path)
        _, to_basename = os.path.split(to_path)
        # missing files have both paths, but no kind.
        return (file_id, (from_path, to_path), True, (True, True),
                (parent_id, parent_id),
                (from_basename, to_basename), (kind, None), (False, False))

    def deleted(self, tree, file_id):
        entry = tree.root_inventory.get_entry(file_id)
        path = tree.id2path(file_id)
        return (file_id, (path, None), True, (True, False), (entry.parent_id, None),
                (entry.name, None), (entry.kind, None),
                (entry.executable, None))

    def renamed(self, from_tree, to_tree, file_id, content_changed):
        from_path, from_entry = self.get_path_entry(from_tree, file_id)
        to_path, to_entry = self.get_path_entry(to_tree, file_id)
        return (file_id, (from_path, to_path), content_changed, (True, True),
                (from_entry.parent_id, to_entry.parent_id),
                (from_entry.name, to_entry.name),
                (from_entry.kind, to_entry.kind),
                (from_entry.executable, to_entry.executable))

    def unchanged(self, tree, file_id):
        path, entry = self.get_path_entry(tree, file_id)
        parent = entry.parent_id
        name = entry.name
        kind = entry.kind
        executable = entry.executable
        return (file_id, (path, path), False, (True, True),
                (parent, parent), (name, name), (kind, kind),
                (executable, executable))

    def unversioned(self, tree, path):
        """Create an unversioned result."""
        _, basename = os.path.split(path)
        kind = tree._comparison_data(None, path)[0]
        return (None, (None, path), True, (False, False), (None, None),
                (None, basename), (None, kind),
                (None, False))

    def sorted(self, changes):
        return sorted(changes, key=_change_key)

    def test_empty_to_abc_content(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        expected_results = self.sorted([
            self.added(tree2, b'root-id'),
            self.added(tree2, b'a-id'),
            self.added(tree2, b'b-id'),
            self.added(tree2, b'c-id'),
            self.deleted(tree1, b'empty-root-id')])
        self.assertEqual(expected_results, self.do_iter_changes(tree1, tree2))
        self.check_has_changes(True, tree1, tree2)

    def test_empty_specific_files(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.assertEqual([],
                         self.do_iter_changes(tree1, tree2, specific_files=[]))

    def test_no_specific_files(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        expected_results = self.sorted([
            self.added(tree2, b'root-id'),
            self.added(tree2, b'a-id'),
            self.added(tree2, b'b-id'),
            self.added(tree2, b'c-id'),
            self.deleted(tree1, b'empty-root-id')])
        self.assertEqual(expected_results, self.do_iter_changes(tree1, tree2))
        self.check_has_changes(True, tree1, tree2)

    def test_empty_to_abc_content_a_only(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.assertEqual(
            self.sorted([self.added(tree2, b'root-id'),
                         self.added(tree2, b'a-id'),
                         self.deleted(tree1, b'empty-root-id')]),
            self.do_iter_changes(tree1, tree2, specific_files=['a']))

    def test_abc_content_to_empty_a_only(self):
        # For deletes we don't need to pickup parents.
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_no_content(tree2)
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.assertEqual(
            [self.deleted(tree1, b'a-id')],
            self.do_iter_changes(tree1, tree2, specific_files=['a']))

    def test_abc_content_to_empty_b_only(self):
        # When b stops being a directory we have to pick up b/c as well.
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_no_content(tree2)
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.assertEqual(
            [self.deleted(tree1, b'b-id'), self.deleted(tree1, b'c-id')],
            self.do_iter_changes(tree1, tree2, specific_files=['b']))

    def test_empty_to_abc_content_a_and_c_only(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_no_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        expected_result = self.sorted([self.added(tree2, b'root-id'),
                                       self.added(
                                           tree2, b'a-id'), self.added(tree2, b'b-id'),
                                       self.added(tree2, b'c-id'), self.deleted(tree1, b'empty-root-id')])
        self.assertEqual(expected_result,
                         self.do_iter_changes(tree1, tree2, specific_files=['a', 'b/c']))

    def test_abc_content_to_empty(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_no_content(tree2)
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        expected_results = self.sorted([
            self.added(tree2, b'empty-root-id'),
            self.deleted(tree1, b'root-id'), self.deleted(tree1, b'a-id'),
            self.deleted(tree1, b'b-id'), self.deleted(tree1, b'c-id')])
        self.assertEqual(
            expected_results,
            self.do_iter_changes(tree1, tree2))
        self.check_has_changes(True, tree1, tree2)

    def test_content_modification(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_2(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        root_id = tree1.path2id('')
        self.assertEqual([(b'a-id', ('a', 'a'), True, (True, True),
                           (root_id, root_id), ('a', 'a'),
                           ('file', 'file'), (False, False))],
                         self.do_iter_changes(tree1, tree2))
        self.check_has_changes(True, tree1, tree2)

    def test_meta_modification(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_3(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        self.assertEqual([(b'c-id', ('b/c', 'b/c'), False, (True, True),
                           (b'b-id', b'b-id'), ('c', 'c'), ('file', 'file'),
                           (False, True))],
                         self.do_iter_changes(tree1, tree2))

    def test_empty_dir(self):
        """an empty dir should not cause glitches to surrounding files."""
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        # the pathname is chosen to fall between 'a' and 'b'.
        self.build_tree(['1/a-empty/', '2/a-empty/'])
        tree1.add(['a-empty'], [b'a-empty'])
        tree2.add(['a-empty'], [b'a-empty'])
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        expected = []
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2))

    def test_file_rename(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_4(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        root_id = tree1.path2id('')
        self.assertEqual([(tree1.path2id('a'), ('a', 'd'), False, (True, True),
                           (root_id, root_id), ('a', 'd'), ('file', 'file'),
                           (False, False))],
                         self.do_iter_changes(tree1, tree2))

    def test_file_rename_and_modification(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_5(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        root_id = tree1.path2id('')
        self.assertEqual([(b'a-id', ('a', 'd'), True, (True, True),
                           (root_id, root_id), ('a', 'd'), ('file', 'file'),
                           (False, False))],
                         self.do_iter_changes(tree1, tree2))

    def test_specific_content_modification_grabs_parents(self):
        # WHen the only direct change to a specified file is a content change,
        # and its in a reparented subtree, the parents are grabbed.
        tree1 = self.make_branch_and_tree('1')
        tree1.mkdir('changing', b'parent-id')
        tree1.mkdir('changing/unchanging', b'mid-id')
        tree1.add(['changing/unchanging/file'], [b'file-id'], ['file'])
        tree1.put_file_bytes_non_atomic('changing/unchanging/file', b'a file')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree2.mkdir('changed', b'parent-id')
        tree2.mkdir('changed/unchanging', b'mid-id')
        tree2.add(['changed/unchanging/file'], [b'file-id'], ['file'])
        tree2.put_file_bytes_non_atomic('changed/unchanging/file', b'changed content')
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        # parent-id has changed, as has file-id
        root_id = tree1.path2id('')
        self.assertEqualIterChanges(
            [self.renamed(tree1, tree2, b'parent-id', False),
             self.renamed(tree1, tree2, b'file-id', True)],
            self.do_iter_changes(tree1, tree2,
                                 specific_files=['changed/unchanging/file']))

    def test_specific_content_modification_grabs_parents_root_changes(self):
        # WHen the only direct change to a specified file is a content change,
        # and its in a reparented subtree, the parents are grabbed, even if
        # that includes the root.
        tree1 = self.make_branch_and_tree('1')
        tree1.set_root_id(b'old')
        tree1.mkdir('changed', b'parent-id')
        tree1.mkdir('changed/unchanging', b'mid-id')
        tree1.add(['changed/unchanging/file'], [b'file-id'], ['file'])
        tree1.put_file_bytes_non_atomic('changed/unchanging/file', b'a file')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(b'new')
        tree2.mkdir('changed', b'parent-id')
        tree2.mkdir('changed/unchanging', b'mid-id')
        tree2.add(['changed/unchanging/file'], [b'file-id'], ['file'])
        tree2.put_file_bytes_non_atomic(
            'changed/unchanging/file', b'changed content')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        # old is gone, new is added, parent-id has changed(reparented), as has
        # file-id(content)
        root_id = tree1.path2id('')
        self.assertEqualIterChanges(
            [self.renamed(tree1, tree2, b'parent-id', False),
             self.added(tree2, b'new'),
             self.deleted(tree1, b'old'),
             self.renamed(tree1, tree2, b'file-id', True)],
            self.do_iter_changes(tree1, tree2,
                                 specific_files=['changed/unchanging/file']))

    def test_specific_with_rename_under_new_dir_reports_new_dir(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_7(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        # d(d-id) is new, e is b-id renamed.
        root_id = tree1.path2id('')
        self.assertEqualIterChanges(
            [self.renamed(tree1, tree2, b'b-id', False),
             self.added(tree2, b'd-id')],
            self.do_iter_changes(tree1, tree2, specific_files=['d/e']))

    def test_specific_with_rename_under_dir_under_new_dir_reports_new_dir(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_7(tree2)
        tree2.rename_one('a', 'd/e/a')
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        # d is new, d/e is b-id renamed, d/e/a is a-id renamed
        root_id = tree1.path2id('')
        self.assertEqualIterChanges(
            [self.renamed(tree1, tree2, tree1.path2id('b'), False),
             self.added(tree2, b'd-id'),
             self.renamed(tree1, tree2, b'a-id', False)],
            self.do_iter_changes(tree1, tree2, specific_files=['d/e/a']))

    def test_specific_old_parent_same_path_new_parent(self):
        # when a parent is new at its path, if the path was used in the source
        # it must be emitted as a change.
        tree1 = self.make_branch_and_tree('1')
        tree1.add(['a'], [b'a-id'], ['file'])
        tree1.put_file_bytes_non_atomic('a', b'a file')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree2.mkdir('a', b'b-id')
        tree2.add(['a/c'], [b'c-id'], ['file'])
        tree2.put_file_bytes_non_atomic('a/c', b'another file')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        # a-id is gone, b-id and c-id are added.
        self.assertEqualIterChanges(
            [self.deleted(tree1, b'a-id'),
             self.added(tree2, b'b-id'),
             self.added(tree2, b'c-id')],
            self.do_iter_changes(tree1, tree2, specific_files=['a/c']))

    def test_specific_old_parent_becomes_file(self):
        # When an old parent included because of a path conflict becomes a
        # non-directory, its children have to be all included in the delta.
        tree1 = self.make_branch_and_tree('1')
        tree1.mkdir('a', b'a-old-id')
        tree1.mkdir('a/reparented', b'reparented-id')
        tree1.mkdir('a/deleted', b'deleted-id')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree2.mkdir('a', b'a-new-id')
        tree2.mkdir('a/reparented', b'reparented-id')
        tree2.add(['b'], [b'a-old-id'], ['file'])
        tree2.put_file_bytes_non_atomic('b', b'')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        # a-old-id is kind-changed, a-new-id is added, reparented-id is renamed,
        # deleted-id is gone
        self.assertEqualIterChanges(
            [self.kind_changed(tree1, tree2, b'a-old-id'),
             self.added(tree2, b'a-new-id'),
             self.renamed(tree1, tree2, b'reparented-id', False),
             self.deleted(tree1, b'deleted-id')],
            self.do_iter_changes(tree1, tree2,
                                 specific_files=['a/reparented']))

    def test_specific_old_parent_is_deleted(self):
        # When an old parent included because of a path conflict is removed,
        # its children have to be all included in the delta.
        tree1 = self.make_branch_and_tree('1')
        tree1.mkdir('a', b'a-old-id')
        tree1.mkdir('a/reparented', b'reparented-id')
        tree1.mkdir('a/deleted', b'deleted-id')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree2.mkdir('a', b'a-new-id')
        tree2.mkdir('a/reparented', b'reparented-id')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        # a-old-id is gone, a-new-id is added, reparented-id is renamed,
        # deleted-id is gone
        self.assertEqualIterChanges(
            [self.deleted(tree1, b'a-old-id'),
             self.added(tree2, b'a-new-id'),
             self.renamed(tree1, tree2, b'reparented-id', False),
             self.deleted(tree1, b'deleted-id')],
            self.do_iter_changes(tree1, tree2,
                                 specific_files=['a/reparented']))

    def test_specific_old_parent_child_collides_with_unselected_new(self):
        # When the child of an old parent because of a path conflict becomes a
        # path conflict with some unselected item in the source, that item also
        # needs to be included (because otherwise the output of applying the
        # delta to the source would have two items at that path).
        tree1 = self.make_branch_and_tree('1')
        tree1.mkdir('a', b'a-old-id')
        tree1.mkdir('a/reparented', b'reparented-id')
        tree1.mkdir('collides', b'collides-id')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree2.mkdir('a', b'a-new-id')
        tree2.mkdir('a/selected', b'selected-id')
        tree2.mkdir('collides', b'reparented-id')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        # a-old-id is one, a-new-id is added, reparented-id is renamed,
        # collides-id is gone, selected-id is new.
        self.assertEqualIterChanges(
            [self.deleted(tree1, b'a-old-id'),
             self.added(tree2, b'a-new-id'),
             self.renamed(tree1, tree2, b'reparented-id', False),
             self.deleted(tree1, b'collides-id'),
             self.added(tree2, b'selected-id')],
            self.do_iter_changes(tree1, tree2,
                                 specific_files=['a/selected']))

    def test_specific_old_parent_child_dir_stops_being_dir(self):
        # When the child of an old parent also stops being a directory, its
        # children must also be included. This test checks that downward
        # recursion is done appropriately by starting at a child of the root of
        # a deleted subtree (a/reparented), and checking that a sibling
        # directory (a/deleted) has its children included in the delta.
        tree1 = self.make_branch_and_tree('1')
        tree1.mkdir('a', b'a-old-id')
        tree1.mkdir('a/reparented', b'reparented-id-1')
        tree1.mkdir('a/deleted', b'deleted-id-1')
        tree1.mkdir('a/deleted/reparented', b'reparented-id-2')
        tree1.mkdir('a/deleted/deleted', b'deleted-id-2')
        tree2 = self.make_to_branch_and_tree('2')
        tree2.set_root_id(tree1.get_root_id())
        tree2.mkdir('a', b'a-new-id')
        tree2.mkdir('a/reparented', b'reparented-id-1')
        tree2.mkdir('reparented', b'reparented-id-2')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        # a-old-id is gone, a-new-id is added, reparented-id-1, -2 are renamed,
        # deleted-id-1 and -2 are gone.
        self.assertEqualIterChanges(
            [self.deleted(tree1, b'a-old-id'),
             self.added(tree2, b'a-new-id'),
             self.renamed(tree1, tree2, b'reparented-id-1', False),
             self.renamed(tree1, tree2, b'reparented-id-2', False),
             self.deleted(tree1, b'deleted-id-1'),
             self.deleted(tree1, b'deleted-id-2')],
            self.do_iter_changes(tree1, tree2,
                                 specific_files=['a/reparented']))

    def test_file_rename_and_meta_modification(self):
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_6(tree2)
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        root_id = tree1.path2id('')
        self.assertEqual([(b'c-id', ('b/c', 'e'), False, (True, True),
                           (b'b-id', root_id), ('c', 'e'), ('file', 'file'),
                           (False, True))],
                         self.do_iter_changes(tree1, tree2))

    def test_file_becomes_unversionable_bug_438569(self):
        # This isn't strictly a intertree problem, but its the intertree code
        # path that triggers all stat cache updates on both xml and dirstate
        # trees.
        # In bug 438569, a file becoming a fifo causes an assert. Fifo's are
        # not versionable or diffable. For now, we simply stop cold when they
        # are detected (because we don't know how far through the code the
        # assumption 'fifo's do not exist' goes). In future we could report
        # the kind change and have commit refuse to go futher, or something
        # similar. One particular reason for choosing this approach is that
        # there is no minikind for 'fifo' in dirstate today, so we can't
        # actually update records that way.
        # To add confusion, the totally generic code path works - but it
        # doesn't update persistent metadata. So this test permits InterTrees
        # to either work, or fail with BadFileKindError.
        self.requireFeature(features.OsFifoFeature)
        tree1 = self.make_branch_and_tree('1')
        self.build_tree(['1/a'])
        tree1.set_root_id(b'root-id')
        tree1.add(['a'], [b'a-id'])
        tree2 = self.make_branch_and_tree('2')
        os.mkfifo('2/a')
        tree2.add(['a'], [b'a-id'], ['file'])
        try:
            tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        except (KeyError,):
            raise tests.TestNotApplicable(
                "Cannot represent a FIFO in this case %s" % self.id())
        try:
            self.do_iter_changes(tree1, tree2)
        except errors.BadFileKindError:
            pass

    def test_missing_in_target(self):
        """Test with the target files versioned but absent from disk."""
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content(tree2)
        os.unlink('2/a')
        shutil.rmtree('2/b')
        # TODO ? have a symlink here?
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        self.not_applicable_if_missing_in('a', tree2)
        self.not_applicable_if_missing_in('b', tree2)
        expected = self.sorted([
            self.missing(b'a-id', 'a', 'a', b'root-id', 'file'),
            self.missing(b'b-id', 'b', 'b', b'root-id', 'directory'),
            self.missing(b'c-id', 'b/c', 'b/c', b'b-id', 'file'),
            ])
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2))

    def test_missing_and_renamed(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree1/file'])
        tree1.add(['file'], [b'file-id'])
        self.build_tree(['tree2/directory/'])
        tree2.add(['directory'], [b'file-id'])
        os.rmdir('tree2/directory')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_missing_in('directory', tree2)

        root_id = tree1.path2id('')
        expected = self.sorted([
            self.missing(b'file-id', 'file', 'directory', root_id, 'file'),
            ])
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2))

    def test_only_in_source_and_missing(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree1/file'])
        tree1.add(['file'], [b'file-id'])
        os.unlink('tree1/file')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_missing_in('file', tree1)
        root_id = tree1.path2id('')
        expected = [(b'file-id', ('file', None), False, (True, False),
                     (root_id, None), ('file', None), (None, None), (False, None))]
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2))

    def test_only_in_target_and_missing(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree2/file'])
        tree2.add(['file'], [b'file-id'])
        os.unlink('tree2/file')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_missing_in('file', tree2)
        root_id = tree1.path2id('')
        expected = [(b'file-id', (None, 'file'), False, (False, True),
                     (None, root_id), (None, 'file'), (None, None), (None, False))]
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2))

    def test_only_in_target_missing_subtree_specific_bug_367632(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree2/a-dir/', 'tree2/a-dir/a-file'])
        tree2.add(['a-dir', 'a-dir/a-file'], [b'dir-id', b'file-id'])
        os.unlink('tree2/a-dir/a-file')
        os.rmdir('tree2/a-dir')
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_missing_in('a-dir', tree2)
        root_id = tree1.path2id('')
        expected = [
            (b'dir-id', (None, 'a-dir'), False, (False, True),
             (None, root_id), (None, 'a-dir'), (None, None), (None, False)),
            (b'file-id', (None, 'a-dir/a-file'), False, (False, True),
             (None, b'dir-id'), (None, 'a-file'), (None, None), (None, False))
            ]
        # bug 367632 showed that specifying the root broke some code paths,
        # so we check this contract with and without it.
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2))
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2, specific_files=['']))

    def test_unchanged_with_renames_and_modifications(self):
        """want_unchanged should generate a list of unchanged entries."""
        tree1 = self.make_branch_and_tree('1')
        tree2 = self.make_to_branch_and_tree('2')
        tree1 = self.get_tree_no_parents_abc_content(tree1)
        tree2 = self.get_tree_no_parents_abc_content_5(tree2)
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.assertEqual(sorted([self.unchanged(tree1, b'root-id'),
                                 self.unchanged(tree1, b'b-id'),
                                 (b'a-id', ('a', 'd'), True, (True, True),
                                  (b'root-id', b'root-id'), ('a',
                                                             'd'), ('file', 'file'),
                                  (False, False)), self.unchanged(tree1, b'c-id')]),
                         self.do_iter_changes(tree1, tree2, include_unchanged=True))

    def test_compare_subtrees(self):
        tree1 = self.make_branch_and_tree('1')
        if not tree1.supports_tree_reference():
            return
        tree1.set_root_id(b'root-id')
        subtree1 = self.make_branch_and_tree('1/sub')
        subtree1.set_root_id(b'subtree-id')
        tree1.add_reference(subtree1)

        tree2 = self.make_to_branch_and_tree('2')
        if not tree2.supports_tree_reference():
            return
        tree2.set_root_id(b'root-id')
        subtree2 = self.make_to_branch_and_tree('2/sub')
        subtree2.set_root_id(b'subtree-id')
        tree2.add_reference(subtree2)
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)

        self.assertEqual([], list(tree2.iter_changes(tree1)))
        subtree1.commit('commit', rev_id=b'commit-a')
        self.assertEqual([
            (b'root-id',
             (u'', u''),
             False,
             (True, True),
             (None, None),
             (u'', u''),
             ('directory', 'directory'),
             (False, False)),
            (b'subtree-id',
             ('sub', 'sub',),
             False,
             (True, True),
             (b'root-id', b'root-id'),
             ('sub', 'sub'),
             ('tree-reference', 'tree-reference'),
             (False, False))],
            list(tree2.iter_changes(tree1,
                                    include_unchanged=True)))

    def test_disk_in_subtrees_skipped(self):
        """subtrees are considered not-in-the-current-tree.

        This test tests the trivial case, where the basis has no paths in the
        current trees subtree.
        """
        tree1 = self.make_branch_and_tree('1')
        tree1.set_root_id(b'root-id')
        tree2 = self.make_to_branch_and_tree('2')
        if not tree2.supports_tree_reference():
            return
        tree2.set_root_id(b'root-id')
        subtree2 = self.make_to_branch_and_tree('2/sub')
        subtree2.set_root_id(b'subtree-id')
        tree2.add_reference(subtree2)
        self.build_tree(['2/sub/file'])
        subtree2.add(['file'])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        # this should filter correctly from above
        self.assertEqual([self.added(tree2, b'subtree-id')],
                         self.do_iter_changes(tree1, tree2, want_unversioned=True))
        # and when the path is named
        self.assertEqual([self.added(tree2, b'subtree-id')],
                         self.do_iter_changes(tree1, tree2, specific_files=['sub'],
                                              want_unversioned=True))

    def test_default_ignores_unversioned_files(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree1/a', 'tree1/c',
                         'tree2/a', 'tree2/b', 'tree2/c'])
        tree1.add(['a', 'c'], [b'a-id', b'c-id'])
        tree2.add(['a', 'c'], [b'a-id', b'c-id'])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)

        # We should ignore the fact that 'b' exists in tree-2
        # because the want_unversioned parameter was not given.
        expected = self.sorted([
            self.content_changed(tree2, b'a-id'),
            self.content_changed(tree2, b'c-id'),
            ])
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2))
        self.check_has_changes(True, tree1, tree2)

    def test_unversioned_paths_in_tree(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree2/file', 'tree2/dir/'])
        if has_symlinks():
            os.symlink('target', 'tree2/link')
            links_supported = True
        else:
            links_supported = False
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_cannot_represent_unversioned(tree2)
        expected = [
            self.unversioned(tree2, 'file'),
            self.unversioned(tree2, 'dir'),
            ]
        if links_supported:
            expected.append(self.unversioned(tree2, 'link'))
        expected = self.sorted(expected)
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2,
                                                        want_unversioned=True))

    def test_unversioned_paths_in_tree_specific_files(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        self.build_tree(['tree2/file', 'tree2/dir/'])
        if has_symlinks():
            os.symlink('target', 'tree2/link')
            links_supported = True
        else:
            links_supported = False
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_cannot_represent_unversioned(tree2)
        expected = [
            self.unversioned(tree2, 'file'),
            self.unversioned(tree2, 'dir'),
            ]
        specific_files = ['file', 'dir']
        if links_supported:
            expected.append(self.unversioned(tree2, 'link'))
            specific_files.append('link')
        expected = self.sorted(expected)
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2,
                                                        specific_files=specific_files, require_versioned=False,
                                                        want_unversioned=True))

    def test_unversioned_paths_in_target_matching_source_old_names(self):
        # its likely that naive implementations of unversioned file support
        # will fail if the path was versioned, but is not any more,
        # due to a rename, not due to unversioning it.
        # That is, if the old tree has a versioned file 'foo', and
        # the new tree has the same file but versioned as 'bar', and also
        # has an unknown file 'foo', we should get back output for
        # both foo and bar.
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree2/file', 'tree2/dir/',
                         'tree1/file', 'tree2/movedfile',
                         'tree1/dir/', 'tree2/moveddir/'])
        if has_symlinks():
            os.symlink('target', 'tree1/link')
            os.symlink('target', 'tree2/link')
            os.symlink('target', 'tree2/movedlink')
            links_supported = True
        else:
            links_supported = False
        tree1.add(['file', 'dir'], [b'file-id', b'dir-id'])
        tree2.add(['movedfile', 'moveddir'], [b'file-id', b'dir-id'])
        if links_supported:
            tree1.add(['link'], [b'link-id'])
            tree2.add(['movedlink'], [b'link-id'])
        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_cannot_represent_unversioned(tree2)
        root_id = tree1.path2id('')
        expected = [
            self.renamed(tree1, tree2, b'dir-id', False),
            self.renamed(tree1, tree2, b'file-id', True),
            self.unversioned(tree2, 'file'),
            self.unversioned(tree2, 'dir'),
            ]
        specific_files = ['file', 'dir']
        if links_supported:
            expected.append(self.renamed(tree1, tree2, b'link-id', False))
            expected.append(self.unversioned(tree2, 'link'))
            specific_files.append('link')
        expected = self.sorted(expected)
        # run once with, and once without specific files, to catch
        # potentially different code paths.
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2,
                                                        require_versioned=False,
                                                        want_unversioned=True))
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2,
                                                        specific_files=specific_files, require_versioned=False,
                                                        want_unversioned=True))

    def test_similar_filenames(self):
        """Test when we have a few files with similar names."""
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())

        # The trees are actually identical, but they happen to contain
        # similarly named files.
        self.build_tree(['tree1/a/',
                         'tree1/a/b/',
                         'tree1/a/b/c/',
                         'tree1/a/b/c/d/',
                         'tree1/a-c/',
                         'tree1/a-c/e/',
                         'tree2/a/',
                         'tree2/a/b/',
                         'tree2/a/b/c/',
                         'tree2/a/b/c/d/',
                         'tree2/a-c/',
                         'tree2/a-c/e/',
                         ])
        tree1.add(['a', 'a/b', 'a/b/c', 'a/b/c/d', 'a-c', 'a-c/e'],
                  [b'a-id', b'b-id', b'c-id', b'd-id', b'a-c-id', b'e-id'])
        tree2.add(['a', 'a/b', 'a/b/c', 'a/b/c/d', 'a-c', 'a-c/e'],
                  [b'a-id', b'b-id', b'c-id', b'd-id', b'a-c-id', b'e-id'])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_cannot_represent_unversioned(tree2)

        self.assertEqual([], self.do_iter_changes(tree1, tree2,
                                                  want_unversioned=True))
        expected = self.sorted([
            self.unchanged(tree2, tree2.get_root_id()),
            self.unchanged(tree2, b'a-id'),
            self.unchanged(tree2, b'b-id'),
            self.unchanged(tree2, b'c-id'),
            self.unchanged(tree2, b'd-id'),
            self.unchanged(tree2, b'a-c-id'),
            self.unchanged(tree2, b'e-id'),
            ])
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2,
                                              want_unversioned=True,
                                              include_unchanged=True))

    def test_unversioned_subtree_only_emits_root(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree2/dir/', 'tree2/dir/file'])
        tree1, tree2 = self.mutable_trees_to_test_trees(self, tree1, tree2)
        self.not_applicable_if_cannot_represent_unversioned(tree2)
        expected = [
            self.unversioned(tree2, 'dir'),
            ]
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2,
                                                        want_unversioned=True))

    def make_trees_with_symlinks(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree1/fromfile', 'tree1/fromdir/'])
        self.build_tree(['tree2/tofile', 'tree2/todir/', 'tree2/unknown'])
        os.symlink('original', 'tree1/changed')
        os.symlink('original', 'tree1/removed')
        os.symlink('original', 'tree1/tofile')
        os.symlink('original', 'tree1/todir')
        # we make the unchanged link point at unknown to catch incorrect
        # symlink-following code in the specified_files test.
        os.symlink('unknown', 'tree1/unchanged')
        os.symlink('new', 'tree2/added')
        os.symlink('new', 'tree2/changed')
        os.symlink('new', 'tree2/fromfile')
        os.symlink('new', 'tree2/fromdir')
        os.symlink('unknown', 'tree2/unchanged')
        from_paths_and_ids = [
            'fromdir',
            'fromfile',
            'changed',
            'removed',
            'todir',
            'tofile',
            'unchanged',
            ]
        to_paths_and_ids = [
            'added',
            'fromdir',
            'fromfile',
            'changed',
            'todir',
            'tofile',
            'unchanged',
            ]
        tree1.add(from_paths_and_ids, [p.encode('utf-8')
                                       for p in from_paths_and_ids])
        tree2.add(to_paths_and_ids, [p.encode('utf-8')
                                     for p in to_paths_and_ids])
        return self.mutable_trees_to_locked_test_trees(tree1, tree2)

    def test_versioned_symlinks(self):
        self.requireFeature(features.SymlinkFeature)
        tree1, tree2 = self.make_trees_with_symlinks()
        self.not_applicable_if_cannot_represent_unversioned(tree2)
        root_id = tree1.path2id('')
        expected = [
            self.unchanged(tree1, tree1.path2id('')),
            self.added(tree2, b'added'),
            self.content_changed(tree2, b'changed'),
            self.kind_changed(tree1, tree2, b'fromdir'),
            self.kind_changed(tree1, tree2, b'fromfile'),
            self.deleted(tree1, b'removed'),
            self.unchanged(tree2, b'unchanged'),
            self.unversioned(tree2, 'unknown'),
            self.kind_changed(tree1, tree2, b'todir'),
            self.kind_changed(tree1, tree2, b'tofile'),
            ]
        expected = self.sorted(expected)
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2, include_unchanged=True,
                                              want_unversioned=True))
        self.check_has_changes(True, tree1, tree2)

    def test_versioned_symlinks_specific_files(self):
        self.requireFeature(features.SymlinkFeature)
        tree1, tree2 = self.make_trees_with_symlinks()
        root_id = tree1.path2id('')
        expected = [
            self.added(tree2, b'added'),
            self.content_changed(tree2, b'changed'),
            self.kind_changed(tree1, tree2, b'fromdir'),
            self.kind_changed(tree1, tree2, b'fromfile'),
            self.deleted(tree1, b'removed'),
            self.kind_changed(tree1, tree2, b'todir'),
            self.kind_changed(tree1, tree2, b'tofile'),
            ]
        expected = self.sorted(expected)
        # we should get back just the changed links. We pass in 'unchanged' to
        # make sure that it is correctly not returned - and neither is the
        # unknown path 'unknown' which it points at.
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2,
                                                        specific_files=['added', 'changed', 'fromdir', 'fromfile',
                                                                        'removed', 'unchanged', 'todir', 'tofile']))
        self.check_has_changes(True, tree1, tree2)

    def test_tree_with_special_names(self):
        tree1, tree2, paths, path_ids = self.make_tree_with_special_names()
        expected = self.sorted(self.added(tree2, f_id) for f_id in path_ids)
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2))
        self.check_has_changes(True, tree1, tree2)

    def test_trees_with_special_names(self):
        tree1, tree2, paths, path_ids = self.make_trees_with_special_names()
        expected = self.sorted(self.content_changed(tree2, f_id) for f_id in path_ids
                               if f_id.endswith(b'_f-id'))
        self.assertEqual(expected, self.do_iter_changes(tree1, tree2))
        self.check_has_changes(True, tree1, tree2)

    def test_trees_with_deleted_dir(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        tree2.set_root_id(tree1.get_root_id())
        self.build_tree(['tree1/a', 'tree1/b/', 'tree1/b/c',
                         'tree1/b/d/', 'tree1/b/d/e', 'tree1/f/', 'tree1/f/g',
                         'tree2/a', 'tree2/f/', 'tree2/f/g'])
        tree1.add(['a', 'b', 'b/c', 'b/d/', 'b/d/e', 'f', 'f/g'],
                  [b'a-id', b'b-id', b'c-id', b'd-id', b'e-id', b'f-id', b'g-id'])
        tree2.add(['a', 'f', 'f/g'], [b'a-id', b'f-id', b'g-id'])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        # We should notice that 'b' and all its children are deleted
        expected = [
            self.content_changed(tree2, b'a-id'),
            self.content_changed(tree2, b'g-id'),
            self.deleted(tree1, b'b-id'),
            self.deleted(tree1, b'c-id'),
            self.deleted(tree1, b'd-id'),
            self.deleted(tree1, b'e-id'),
            ]
        self.assertEqualIterChanges(expected,
                                    self.do_iter_changes(tree1, tree2))
        self.check_has_changes(True, tree1, tree2)

    def test_added_unicode(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        root_id = tree1.get_root_id()
        tree2.set_root_id(root_id)

        # u'\u03b1' == GREEK SMALL LETTER ALPHA
        # u'\u03c9' == GREEK SMALL LETTER OMEGA
        a_id = u'\u03b1-id'.encode('utf8')
        added_id = u'\u03c9_added_id'.encode('utf8')
        try:
            self.build_tree([u'tree1/\u03b1/',
                             u'tree2/\u03b1/',
                             u'tree2/\u03b1/\u03c9-added',
                             ])
        except UnicodeError:
            raise tests.TestSkipped("Could not create Unicode files.")
        tree1.add([u'\u03b1'], [a_id])
        tree2.add([u'\u03b1', u'\u03b1/\u03c9-added'], [a_id, added_id])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)

        self.assertEqual([self.added(tree2, added_id)],
                         self.do_iter_changes(tree1, tree2))
        self.assertEqual([self.added(tree2, added_id)],
                         self.do_iter_changes(tree1, tree2,
                                              specific_files=[u'\u03b1']))
        self.check_has_changes(True, tree1, tree2)

    def test_deleted_unicode(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        root_id = tree1.get_root_id()
        tree2.set_root_id(root_id)

        # u'\u03b1' == GREEK SMALL LETTER ALPHA
        # u'\u03c9' == GREEK SMALL LETTER OMEGA
        a_id = u'\u03b1-id'.encode('utf8')
        deleted_id = u'\u03c9_deleted_id'.encode('utf8')
        try:
            self.build_tree([u'tree1/\u03b1/',
                             u'tree1/\u03b1/\u03c9-deleted',
                             u'tree2/\u03b1/',
                             ])
        except UnicodeError:
            raise tests.TestSkipped("Could not create Unicode files.")
        tree1.add([u'\u03b1', u'\u03b1/\u03c9-deleted'], [a_id, deleted_id])
        tree2.add([u'\u03b1'], [a_id])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)

        self.assertEqual([self.deleted(tree1, deleted_id)],
                         self.do_iter_changes(tree1, tree2))
        self.assertEqual([self.deleted(tree1, deleted_id)],
                         self.do_iter_changes(tree1, tree2,
                                              specific_files=[u'\u03b1']))
        self.check_has_changes(True, tree1, tree2)

    def test_modified_unicode(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        root_id = tree1.get_root_id()
        tree2.set_root_id(root_id)

        # u'\u03b1' == GREEK SMALL LETTER ALPHA
        # u'\u03c9' == GREEK SMALL LETTER OMEGA
        a_id = u'\u03b1-id'.encode('utf8')
        mod_id = u'\u03c9_mod_id'.encode('utf8')
        try:
            self.build_tree([u'tree1/\u03b1/',
                             u'tree1/\u03b1/\u03c9-modified',
                             u'tree2/\u03b1/',
                             u'tree2/\u03b1/\u03c9-modified',
                             ])
        except UnicodeError:
            raise tests.TestSkipped("Could not create Unicode files.")
        tree1.add([u'\u03b1', u'\u03b1/\u03c9-modified'], [a_id, mod_id])
        tree2.add([u'\u03b1', u'\u03b1/\u03c9-modified'], [a_id, mod_id])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)

        self.assertEqual([self.content_changed(tree1, mod_id)],
                         self.do_iter_changes(tree1, tree2))
        self.assertEqual([self.content_changed(tree1, mod_id)],
                         self.do_iter_changes(tree1, tree2,
                                              specific_files=[u'\u03b1']))
        self.check_has_changes(True, tree1, tree2)

    def test_renamed_unicode(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        root_id = tree1.get_root_id()
        tree2.set_root_id(root_id)

        # u'\u03b1' == GREEK SMALL LETTER ALPHA
        # u'\u03c9' == GREEK SMALL LETTER OMEGA
        a_id = u'\u03b1-id'.encode('utf8')
        rename_id = u'\u03c9_rename_id'.encode('utf8')
        try:
            self.build_tree([u'tree1/\u03b1/',
                             u'tree2/\u03b1/',
                             ])
        except UnicodeError:
            raise tests.TestSkipped("Could not create Unicode files.")
        self.build_tree_contents([(u'tree1/\u03c9-source', b'contents\n'),
                                  (u'tree2/\u03b1/\u03c9-target', b'contents\n'),
                                  ])
        tree1.add([u'\u03b1', u'\u03c9-source'], [a_id, rename_id])
        tree2.add([u'\u03b1', u'\u03b1/\u03c9-target'], [a_id, rename_id])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)

        self.assertEqual([self.renamed(tree1, tree2, rename_id, False)],
                         self.do_iter_changes(tree1, tree2))
        self.assertEqualIterChanges(
            [self.renamed(tree1, tree2, rename_id, False)],
            self.do_iter_changes(tree1, tree2, specific_files=[u'\u03b1']))
        self.check_has_changes(True, tree1, tree2)

    def test_unchanged_unicode(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        root_id = tree1.get_root_id()
        tree2.set_root_id(root_id)
        # u'\u03b1' == GREEK SMALL LETTER ALPHA
        # u'\u03c9' == GREEK SMALL LETTER OMEGA
        a_id = u'\u03b1-id'.encode('utf8')
        subfile_id = u'\u03c9-subfile-id'.encode('utf8')
        rootfile_id = u'\u03c9-root-id'.encode('utf8')
        try:
            self.build_tree([u'tree1/\u03b1/',
                             u'tree2/\u03b1/',
                             ])
        except UnicodeError:
            raise tests.TestSkipped("Could not create Unicode files.")
        self.build_tree_contents([
            (u'tree1/\u03b1/\u03c9-subfile', b'sub contents\n'),
            (u'tree2/\u03b1/\u03c9-subfile', b'sub contents\n'),
            (u'tree1/\u03c9-rootfile', b'root contents\n'),
            (u'tree2/\u03c9-rootfile', b'root contents\n'),
            ])
        tree1.add([u'\u03b1', u'\u03b1/\u03c9-subfile', u'\u03c9-rootfile'],
                  [a_id, subfile_id, rootfile_id])
        tree2.add([u'\u03b1', u'\u03b1/\u03c9-subfile', u'\u03c9-rootfile'],
                  [a_id, subfile_id, rootfile_id])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)

        expected = self.sorted([
            self.unchanged(tree1, root_id),
            self.unchanged(tree1, a_id),
            self.unchanged(tree1, subfile_id),
            self.unchanged(tree1, rootfile_id),
            ])
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2,
                                              include_unchanged=True))

        # We should also be able to select just a subset
        expected = self.sorted([
            self.unchanged(tree1, a_id),
            self.unchanged(tree1, subfile_id),
            ])
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2, specific_files=[u'\u03b1'],
                                              include_unchanged=True))

    def test_unknown_unicode(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        root_id = tree1.get_root_id()
        tree2.set_root_id(root_id)
        # u'\u03b1' == GREEK SMALL LETTER ALPHA
        # u'\u03c9' == GREEK SMALL LETTER OMEGA
        a_id = u'\u03b1-id'.encode('utf8')
        try:
            self.build_tree([u'tree1/\u03b1/',
                             u'tree2/\u03b1/',
                             u'tree2/\u03b1/unknown_dir/',
                             u'tree2/\u03b1/unknown_file',
                             u'tree2/\u03b1/unknown_dir/file',
                             u'tree2/\u03c9-unknown_root_file',
                             ])
        except UnicodeError:
            raise tests.TestSkipped("Could not create Unicode files.")
        tree1.add([u'\u03b1'], [a_id])
        tree2.add([u'\u03b1'], [a_id])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_cannot_represent_unversioned(tree2)

        expected = self.sorted([
            self.unversioned(tree2, u'\u03b1/unknown_dir'),
            self.unversioned(tree2, u'\u03b1/unknown_file'),
            self.unversioned(tree2, u'\u03c9-unknown_root_file'),
            # a/unknown_dir/file should not be included because we should not
            # recurse into unknown_dir
            # self.unversioned(tree2, 'a/unknown_dir/file'),
            ])
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2,
                                              require_versioned=False,
                                              want_unversioned=True))
        self.assertEqual([],  # Without want_unversioned we should get nothing
                         self.do_iter_changes(tree1, tree2))
        self.check_has_changes(False, tree1, tree2)

        # We should also be able to select just a subset
        expected = self.sorted([
            self.unversioned(tree2, u'\u03b1/unknown_dir'),
            self.unversioned(tree2, u'\u03b1/unknown_file'),
            ])
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2,
                                              specific_files=[u'\u03b1'],
                                              require_versioned=False,
                                              want_unversioned=True))
        self.assertEqual([],  # Without want_unversioned we should get nothing
                         self.do_iter_changes(tree1, tree2,
                                              specific_files=[u'\u03b1']))

    def test_unknown_empty_dir(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        root_id = tree1.get_root_id()
        tree2.set_root_id(root_id)

        # Start with 2 identical trees
        self.build_tree(['tree1/a/', 'tree1/b/',
                         'tree2/a/', 'tree2/b/'])
        self.build_tree_contents([('tree1/b/file', b'contents\n'),
                                  ('tree2/b/file', b'contents\n')])
        tree1.add(['a', 'b', 'b/file'], [b'a-id', b'b-id', b'b-file-id'])
        tree2.add(['a', 'b', 'b/file'], [b'a-id', b'b-id', b'b-file-id'])

        # Now create some unknowns in tree2
        # We should find both a/file and a/dir as unknown, but we shouldn't
        # recurse into a/dir to find that a/dir/subfile is also unknown.
        self.build_tree(
            ['tree2/a/file', 'tree2/a/dir/', 'tree2/a/dir/subfile'])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_cannot_represent_unversioned(tree2)

        if tree2.has_versioned_directories():
            expected = self.sorted([
                self.unversioned(tree2, u'a/file'),
                self.unversioned(tree2, u'a/dir'),
                ])
            self.assertEqual(expected,
                             self.do_iter_changes(tree1, tree2,
                                                  require_versioned=False,
                                                  want_unversioned=True))
        else:
            expected = self.sorted([
                self.unversioned(tree2, u'a/file'),
                self.unversioned(tree2, u'a/dir/subfile'),
                ])
            self.assertEqual(expected,
                             self.do_iter_changes(tree1, tree2,
                                                  require_versioned=False,
                                                  want_unversioned=True))

    def test_rename_over_deleted(self):
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        root_id = tree1.get_root_id()
        tree2.set_root_id(root_id)

        # The final changes should be:
        #   touch a b c d
        #   add a b c d
        #   commit
        #   rm a d
        #   mv b a
        #   mv c d
        self.build_tree_contents([
            ('tree1/a', b'a contents\n'),
            ('tree1/b', b'b contents\n'),
            ('tree1/c', b'c contents\n'),
            ('tree1/d', b'd contents\n'),
            ('tree2/a', b'b contents\n'),
            ('tree2/d', b'c contents\n'),
            ])
        tree1.add(['a', 'b', 'c', 'd'], [b'a-id', b'b-id', b'c-id', b'd-id'])
        tree2.add(['a', 'd'], [b'b-id', b'c-id'])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)

        expected = self.sorted([
            self.deleted(tree1, b'a-id'),
            self.deleted(tree1, b'd-id'),
            self.renamed(tree1, tree2, b'b-id', False),
            self.renamed(tree1, tree2, b'c-id', False),
            ])
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2))
        self.check_has_changes(True, tree1, tree2)

    def test_deleted_and_unknown(self):
        """Test a file marked removed, but still present on disk."""
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        root_id = tree1.get_root_id()
        tree2.set_root_id(root_id)

        # The final changes should be:
        # bzr add a b c
        # bzr rm --keep b
        self.build_tree_contents([
            ('tree1/a', b'a contents\n'),
            ('tree1/b', b'b contents\n'),
            ('tree1/c', b'c contents\n'),
            ('tree2/a', b'a contents\n'),
            ('tree2/b', b'b contents\n'),
            ('tree2/c', b'c contents\n'),
            ])
        tree1.add(['a', 'b', 'c'], [b'a-id', b'b-id', b'c-id'])
        tree2.add(['a', 'c'], [b'a-id', b'c-id'])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_cannot_represent_unversioned(tree2)

        expected = self.sorted([
            self.deleted(tree1, b'b-id'),
            self.unversioned(tree2, 'b'),
            ])
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2,
                                              want_unversioned=True))
        expected = self.sorted([
            self.deleted(tree1, b'b-id'),
            ])
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2,
                                              want_unversioned=False))

    def test_renamed_and_added(self):
        """Test when we have renamed a file, and put another in its place."""
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        root_id = tree1.get_root_id()
        tree2.set_root_id(root_id)

        # The final changes are:
        # bzr add b c
        # bzr mv b a
        # bzr mv c d
        # bzr add b c

        self.build_tree_contents([
            ('tree1/b', b'b contents\n'),
            ('tree1/c', b'c contents\n'),
            ('tree2/a', b'b contents\n'),
            ('tree2/b', b'new b contents\n'),
            ('tree2/c', b'new c contents\n'),
            ('tree2/d', b'c contents\n'),
            ])
        tree1.add(['b', 'c'], [b'b1-id', b'c1-id'])
        tree2.add(['a', 'b', 'c', 'd'], [
                  b'b1-id', b'b2-id', b'c2-id', b'c1-id'])

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)

        expected = self.sorted([
            self.renamed(tree1, tree2, b'b1-id', False),
            self.renamed(tree1, tree2, b'c1-id', False),
            self.added(tree2, b'b2-id'),
            self.added(tree2, b'c2-id'),
            ])
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2,
                                              want_unversioned=True))

    def test_renamed_and_unknown(self):
        """A file was moved on the filesystem, but not in bzr."""
        tree1 = self.make_branch_and_tree('tree1')
        tree2 = self.make_to_branch_and_tree('tree2')
        root_id = tree1.get_root_id()
        tree2.set_root_id(root_id)

        # The final changes are:
        # bzr add a b
        # mv a a2

        self.build_tree_contents([
            ('tree1/a', b'a contents\n'),
            ('tree1/b', b'b contents\n'),
            ('tree2/a', b'a contents\n'),
            ('tree2/b', b'b contents\n'),
            ])
        tree1.add(['a', 'b'], [b'a-id', b'b-id'])
        tree2.add(['a', 'b'], [b'a-id', b'b-id'])
        os.rename('tree2/a', 'tree2/a2')

        tree1, tree2 = self.mutable_trees_to_locked_test_trees(tree1, tree2)
        self.not_applicable_if_missing_in('a', tree2)

        expected = self.sorted([
            self.missing(b'a-id', 'a', 'a', tree2.get_root_id(), 'file'),
            self.unversioned(tree2, 'a2'),
            ])
        self.assertEqual(expected,
                         self.do_iter_changes(tree1, tree2,
                                              want_unversioned=True))

2255.2.152 by Martin Pool (broken) merge aaron's workingtree format changes	1	# Copyright (C) 2006, 2007 Canonical Ltd
1852.8.3 by Robert Collins Implement an InterTreeTestProvider and a trivial test_compare test case.	2	#
	3	# This program is free software; you can redistribute it and/or modify
	4	# it under the terms of the GNU General Public License as published by
	5	# the Free Software Foundation; either version 2 of the License, or
	6	# (at your option) any later version.
	7	#
	8	# This program is distributed in the hope that it will be useful,
	9	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	# GNU General Public License for more details.
	12	#
	13	# You should have received a copy of the GNU General Public License
	14	# along with this program; if not, write to the Free Software
4183.7.1 by Sabin Iacob update FSF mailing address	15	# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1852.8.3 by Robert Collins Implement an InterTreeTestProvider and a trivial test_compare test case.	16
	17	"""Tests for the InterTree.compare() function."""
	18
2012.1.5 by Aaron Bentley Implement specific file id and dangling id handling	19	import os
2255.7.4 by Robert Collins Test InterTree._iter_changes with missing (absent but versioned) files.	20	import shutil
2012.1.5 by Aaron Bentley Implement specific file id and dangling id handling	21
6622.1.34 by Jelmer Vernooĳ Rename brzlib => breezy.	22	from breezy import (
4241.6.7 by Vincent Ladeuil Add InterCHKRevisionTree	23	errors,
4503.1.3 by Vincent Ladeuil Take review comments into account.	24	mutabletree,
4241.6.7 by Vincent Ladeuil Add InterCHKRevisionTree	25	tests,
6793.5.1 by Jelmer Vernooĳ Hardcode fileids in fewer places.	26	transform,
4241.6.7 by Vincent Ladeuil Add InterCHKRevisionTree	27	)
6622.1.34 by Jelmer Vernooĳ Rename brzlib => breezy.	28	from breezy.osutils import has_symlinks
	29	from breezy.tests.per_intertree import TestCaseWithTwoTrees
	30	from breezy.tests import (
5967.12.1 by Martin Pool Move all test features into bzrlib.tests.features	31	features,
	32	)
1852.8.3 by Robert Collins Implement an InterTreeTestProvider and a trivial test_compare test case.	33
2255.2.149 by Robert Collins Crufty but existing _iter_changes implementation for WorkingTreeFormat4.	34	# TODO: test the include_root option.
	35	# TODO: test that renaming a directory x->y does not emit a rename for the
	36	# child x/a->y/a.
	37	# TODO: test that renaming a directory x-> does not emit a rename for the child
	38	# x/a -> y/a when a supplied_files argument gives either 'x/' or 'y/a'
	39	# -> that is, when the renamed parent is not processed by the function.
	40	# TODO: test items are only emitted once when a specific_files list names a dir