~bzr-pqm/bzr/bzr.dev

import os

from StringIO import StringIO

from bzrlib.branch import Branch

from bzrlib.builtins import merge

from bzrlib.commit import commit

from bzrlib.errors import UnrelatedBranches, NoCommits, BzrCommandError

from bzrlib.merge import transform_tree, merge_inner

from bzrlib.osutils import pathjoin

from bzrlib.revision import common_ancestor

from bzrlib.tests import TestCaseWithTransport

from bzrlib.trace import (enable_test_log, disable_test_log)

from bzrlib.workingtree import WorkingTree

class TestMerge(TestCaseWithTransport):

    """Test appending more than one revision"""

    def test_pending(self):

        wt = self.make_branch_and_tree('.')

        wt.commit("lala!")

        self.assertEquals(len(wt.pending_merges()), 0)

        merge([u'.', -1], [None, None])

        self.assertEquals(len(wt.pending_merges()), 0)

    def test_undo(self):

        wt = self.make_branch_and_tree('.')

        wt.commit("lala!")

        wt.commit("haha!")

        wt.commit("blabla!")

        merge([u'.', 2], [u'.', 1])

    def test_nocommits(self):

        self.test_pending()

        wt2 = self.make_branch_and_tree('branch2')

        self.assertRaises(NoCommits, merge, ['branch2', -1], 

                          [None, None])

        return wt2

    def test_unrelated(self):

        wt2 = self.test_nocommits()

        wt2.commit("blah")

        self.assertRaises(UnrelatedBranches, merge, ['branch2', -1], 

                          [None, None])

        return wt2

    def test_merge_one(self):

        wt1 = self.make_branch_and_tree('branch1')

        wt1.commit('empty commit')

        wt2 = self.make_branch_and_tree('branch2')

        wt2.pull(wt1.branch)

        file('branch1/foo', 'wb').write('foo')

        file('branch1/bar', 'wb').write('bar')

        wt1.add('foo')

        wt1.add('bar')

        wt1.commit('add foobar')

        os.chdir('branch2')

        self.run_bzr('merge', '../branch1/baz', retcode=3)

        self.run_bzr('merge', '../branch1/foo')

        self.failUnlessExists('foo')

        self.failIfExists('bar')

        wt2 = WorkingTree.open_containing('branch2')[0]

        self.assertEqual(wt2.pending_merges(), [])

    def test_pending_with_null(self):

        """When base is forced to revno 0, pending_merges is set"""

        wt2 = self.test_unrelated()

        wt1 = WorkingTree.open('.')

        br1 = wt1.branch

        br1.fetch(wt2.branch)

        # merge all of branch 2 into branch 1 even though they 

        # are not related.

        self.assertRaises(BzrCommandError, merge, ['branch2', -1], 

                          ['branch2', 0], reprocess=True, show_base=True)

        merge(['branch2', -1], ['branch2', 0], reprocess=True)

        self.assertEquals(len(wt1.pending_merges()), 1)

        return (wt1, wt2.branch)

    def test_two_roots(self):

        """Merge base is sane when two unrelated branches are merged"""

        wt1, br2 = self.test_pending_with_null()

        wt1.commit("blah")

        last = wt1.branch.last_revision()

        self.assertEquals(common_ancestor(last, last, wt1.branch.repository), last)

    def test_create_rename(self):

        """Rename an inventory entry while creating the file"""

        tree =self.make_branch_and_tree('.')

        file('name1', 'wb').write('Hello')

        tree.add('name1')

        tree.commit(message="hello")

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

        os.unlink('name2')

        transform_tree(tree, tree.branch.basis_tree())

    def test_layered_rename(self):

        """Rename both child and parent at same time"""

        tree =self.make_branch_and_tree('.')

        os.mkdir('dirname1')

        tree.add('dirname1')

        filename = pathjoin('dirname1', 'name1')

        file(filename, 'wb').write('Hello')

        tree.add(filename)

        tree.commit(message="hello")

        filename2 = pathjoin('dirname1', 'name2')

        tree.rename_one(filename, filename2)

        tree.rename_one('dirname1', 'dirname2')

        transform_tree(tree, tree.branch.basis_tree())

    def test_ignore_zero_merge_inner(self):

        # Test that merge_inner's ignore zero paramter is effective

        tree_a =self.make_branch_and_tree('a')

        tree_a.commit(message="hello")

        dir_b = tree_a.bzrdir.sprout('b')

        tree_b = dir_b.open_workingtree()

        tree_a.commit(message="hello again")

        log = StringIO()

        merge_inner(tree_b.branch, tree_a, tree_b.basis_tree(), 

                    this_tree=tree_b, ignore_zero=True)

        log = self._get_log()

        self.failUnless('All changes applied successfully.\n' not in log)

        tree_b.revert([])

        merge_inner(tree_b.branch, tree_a, tree_b.basis_tree(), 

                    this_tree=tree_b, ignore_zero=False)

        log = self._get_log()

        self.failUnless('All changes applied successfully.\n' in log)