/brz/remove-bazaar

# Copyright (C) 2006 Canonical Ltd

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

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Tests for the WorkingTree.merge_from_branch api."""

import os

from bzrlib import (

    errors,

    merge

    )

from bzrlib.tests.workingtree_implementations import TestCaseWithWorkingTree

class TestMergeFromBranch(TestCaseWithWorkingTree):

    def create_two_trees_for_merging(self):

        """Create two trees that can be merged from.

        This sets self.tree_from, self.first_rev, self.tree_to, self.second_rev

        and self.to_second_rev.

        """

        self.tree_from = self.make_branch_and_tree('from')

        self.first_rev = self.tree_from.commit('first post')

        self.tree_to = self.tree_from.bzrdir.sprout('to').open_workingtree()

        self.second_rev = self.tree_from.commit('second rev', allow_pointless=True)

        self.to_second_rev = self.tree_to.commit('second rev', allow_pointless=True)

    def test_smoking_merge(self):

        """Smoke test of merge_from_branch."""

        self.create_two_trees_for_merging()

        self.tree_to.merge_from_branch(self.tree_from.branch)

        self.assertEqual([self.to_second_rev, self.second_rev],

            self.tree_to.get_parent_ids())

    def test_merge_to_revision(self):

        """Merge from a branch to a revision that is not the tip."""

        self.create_two_trees_for_merging()

        self.third_rev = self.tree_from.commit('real_tip')

        self.tree_to.merge_from_branch(self.tree_from.branch,

            to_revision=self.second_rev)

        self.assertEqual([self.to_second_rev, self.second_rev],

            self.tree_to.get_parent_ids())

    def test_compare_after_merge(self):

        tree_a = self.make_branch_and_tree('tree_a')

        self.build_tree_contents([('tree_a/file', 'text-a')])

        tree_a.add('file')

        tree_a.commit('added file')

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

        os.unlink('tree_a/file')

        tree_a.commit('deleted file')

        self.build_tree_contents([('tree_b/file', 'text-b')])

        tree_b.commit('changed file')

        tree_a.merge_from_branch(tree_b.branch)

        tree_a.lock_read()

        self.addCleanup(tree_a.unlock)

        list(tree_a._iter_changes(tree_a.basis_tree()))

    def test_merge_empty(self):

        tree_a = self.make_branch_and_tree('tree_a')

        self.build_tree_contents([('tree_a/file', 'text-a')])

        tree_a.add('file')

        tree_a.commit('added file')

        tree_b = self.make_branch_and_tree('treeb')

        self.assertRaises(errors.NoCommits, tree_a.merge_from_branch,

                          tree_b.branch)

        tree_b.merge_from_branch(tree_a.branch)

    def test_merge_base(self):

        tree_a = self.make_branch_and_tree('tree_a')

        self.build_tree_contents([('tree_a/file', 'text-a')])

        tree_a.add('file')

        tree_a.commit('added file', rev_id='rev_1')

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

        os.unlink('tree_a/file')

        tree_a.commit('deleted file')

        self.build_tree_contents([('tree_b/file', 'text-b')])

        tree_b.commit('changed file')

        self.assertRaises(errors.PointlessMerge, tree_a.merge_from_branch,

            tree_b.branch, from_revision=tree_b.branch.last_revision())

        tree_a.merge_from_branch(tree_b.branch, from_revision='rev_1')

        tree_a.lock_read()

        self.addCleanup(tree_a.unlock)

        changes = list(tree_a._iter_changes(tree_a.basis_tree()))

        self.assertEqual(1, len(changes))

    def test_merge_type(self):

        this = self.make_branch_and_tree('this')

        self.build_tree_contents([('this/foo', 'foo')])

        this.add('foo', 'foo-id')

        this.commit('added foo')

        other = this.bzrdir.sprout('other').open_workingtree()

        self.build_tree_contents([('other/foo', 'bar')])

        other.commit('content -> bar')

        self.build_tree_contents([('this/foo', 'baz')])

        this.commit('content -> baz')

        class QuxMerge(merge.Merge3Merger):

            def text_merge(self, file_id, trans_id):

                self.tt.create_file('qux', trans_id)

        this.merge_from_branch(other.branch, merge_type=QuxMerge)

        self.assertEqual('qux', this.get_file_text('foo-id'))