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bzrlib/tests/test_merge.py
 
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# Copyright (C) 2005, 2006 Canonical Ltd
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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import os
 
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from StringIO import StringIO
 
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from bzrlib import (
 
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    conflicts,
 
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    merge as _mod_merge,
 
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    option,
 
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    )
 
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from bzrlib.branch import Branch
 
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from bzrlib.builtins import merge
 
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from bzrlib.conflicts import ConflictList, TextConflict
 
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from bzrlib.errors import UnrelatedBranches, NoCommits, BzrCommandError
 
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from bzrlib.merge import transform_tree, merge_inner
 
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from bzrlib.osutils import pathjoin, file_kind
 
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from bzrlib.revision import common_ancestor
 
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from bzrlib.tests import TestCaseWithTransport
 
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from bzrlib.trace import (enable_test_log, disable_test_log)
 
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from bzrlib.workingtree import WorkingTree
 
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class TestMerge(TestCaseWithTransport):
 
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    """Test appending more than one revision"""
 
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    def test_pending(self):
 
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        wt = self.make_branch_and_tree('.')
 
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        rev_a = wt.commit("lala!")
 
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        self.assertEqual([rev_a], wt.get_parent_ids())
 
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        merge([u'.', -1], [None, None])
 
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        self.assertEqual([rev_a], wt.get_parent_ids())
 
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    def test_undo(self):
 
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        wt = self.make_branch_and_tree('.')
 
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        wt.commit("lala!")
 
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        wt.commit("haha!")
 
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        wt.commit("blabla!")
 
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        merge([u'.', 2], [u'.', 1])
 
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    def test_nocommits(self):
 
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        self.test_pending()
 
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        wt2 = self.make_branch_and_tree('branch2')
 
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        self.assertRaises(NoCommits, merge, ['branch2', -1], 
 
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                          [None, None])
 
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        return wt2
 
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    def test_unrelated(self):
 
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        wt2 = self.test_nocommits()
 
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        wt2.commit("blah")
 
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        self.assertRaises(UnrelatedBranches, merge, ['branch2', -1], 
 
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                          [None, None])
 
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        return wt2
 
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    def test_merge_one_file(self):
 
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        """Do a partial merge of a tree which should not affect tree parents."""
 
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        wt1 = self.make_branch_and_tree('branch1')
 
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        tip = wt1.commit('empty commit')
 
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        wt2 = self.make_branch_and_tree('branch2')
 
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        wt2.pull(wt1.branch)
 
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        file('branch1/foo', 'wb').write('foo')
 
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        file('branch1/bar', 'wb').write('bar')
 
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        wt1.add('foo')
 
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        wt1.add('bar')
 
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        wt1.commit('add foobar')
 
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        os.chdir('branch2')
 
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        self.run_bzr('merge', '../branch1/baz', retcode=3)
 
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        self.run_bzr('merge', '../branch1/foo')
 
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        self.failUnlessExists('foo')
 
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        self.failIfExists('bar')
 
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        wt2 = WorkingTree.open('.') # opens branch2
 
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        self.assertEqual([tip], wt2.get_parent_ids())
 
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    def test_pending_with_null(self):
 
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        """When base is forced to revno 0, parent_ids are set"""
 
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        wt2 = self.test_unrelated()
 
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        wt1 = WorkingTree.open('.')
 
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        br1 = wt1.branch
 
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        br1.fetch(wt2.branch)
 
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        # merge all of branch 2 into branch 1 even though they 
 
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        # are not related.
 
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        self.assertRaises(BzrCommandError, merge, ['branch2', -1],
 
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                          ['branch2', 0], reprocess=True, show_base=True)
 
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        merge(['branch2', -1], ['branch2', 0], reprocess=True)
 
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        self.assertEqual([br1.last_revision(), wt2.branch.last_revision()],
 
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            wt1.get_parent_ids())
 
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        return (wt1, wt2.branch)
 
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102
    def test_two_roots(self):
 
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        """Merge base is sane when two unrelated branches are merged"""
 
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        wt1, br2 = self.test_pending_with_null()
 
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        wt1.commit("blah")
 
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        last = wt1.branch.last_revision()
 
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        self.assertEqual(common_ancestor(last, last, wt1.branch.repository), last)
 
108
 
 
109
    def test_create_rename(self):
 
110
        """Rename an inventory entry while creating the file"""
 
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        tree =self.make_branch_and_tree('.')
 
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        file('name1', 'wb').write('Hello')
 
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        tree.add('name1')
 
114
        tree.commit(message="hello")
 
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        tree.rename_one('name1', 'name2')
 
116
        os.unlink('name2')
 
117
        transform_tree(tree, tree.branch.basis_tree())
 
118
 
 
119
    def test_layered_rename(self):
 
120
        """Rename both child and parent at same time"""
 
121
        tree =self.make_branch_and_tree('.')
 
122
        os.mkdir('dirname1')
 
123
        tree.add('dirname1')
 
124
        filename = pathjoin('dirname1', 'name1')
 
125
        file(filename, 'wb').write('Hello')
 
126
        tree.add(filename)
 
127
        tree.commit(message="hello")
 
128
        filename2 = pathjoin('dirname1', 'name2')
 
129
        tree.rename_one(filename, filename2)
 
130
        tree.rename_one('dirname1', 'dirname2')
 
131
        transform_tree(tree, tree.branch.basis_tree())
 
132
 
 
133
    def test_ignore_zero_merge_inner(self):
 
134
        # Test that merge_inner's ignore zero parameter is effective
 
135
        tree_a =self.make_branch_and_tree('a')
 
136
        tree_a.commit(message="hello")
 
137
        dir_b = tree_a.bzrdir.sprout('b')
 
138
        tree_b = dir_b.open_workingtree()
 
139
        tree_a.commit(message="hello again")
 
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        log = StringIO()
 
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        merge_inner(tree_b.branch, tree_a, tree_b.basis_tree(), 
 
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                    this_tree=tree_b, ignore_zero=True)
 
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        log = self._get_log(keep_log_file=True)
 
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        self.failUnless('All changes applied successfully.\n' not in log)
 
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        tree_b.revert([])
 
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        merge_inner(tree_b.branch, tree_a, tree_b.basis_tree(), 
 
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                    this_tree=tree_b, ignore_zero=False)
 
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        log = self._get_log(keep_log_file=True)
 
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        self.failUnless('All changes applied successfully.\n' in log)
 
150
 
 
151
    def test_merge_inner_conflicts(self):
 
152
        tree_a = self.make_branch_and_tree('a')
 
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        tree_a.set_conflicts(ConflictList([TextConflict('patha')]))
 
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        merge_inner(tree_a.branch, tree_a, tree_a, this_tree=tree_a)
 
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        self.assertEqual(1, len(tree_a.conflicts()))
 
156
 
 
157
    def test_rmdir_conflict(self):
 
158
        tree_a = self.make_branch_and_tree('a')
 
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        self.build_tree(['a/b/'])
 
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        tree_a.add('b', 'b-id')
 
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        tree_a.commit('added b')
 
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        # basis_tree() is only guaranteed to be valid as long as it is actually
 
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        # the basis tree. This mutates the tree after grabbing basis, so go to
 
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        # the repository.
 
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        base_tree = tree_a.branch.repository.revision_tree(tree_a.last_revision())
 
166
        tree_z = tree_a.bzrdir.sprout('z').open_workingtree()
 
167
        self.build_tree(['a/b/c'])
 
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        tree_a.add('b/c')
 
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        tree_a.commit('added c')
 
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        os.rmdir('z/b')
 
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        tree_z.commit('removed b')
 
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        merge_inner(tree_z.branch, tree_a, base_tree, this_tree=tree_z)
 
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        self.assertEqual([
 
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            conflicts.MissingParent('Created directory', 'b', 'b-id'),
 
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            conflicts.UnversionedParent('Versioned directory', 'b', 'b-id')],
 
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            tree_z.conflicts())
 
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        merge_inner(tree_a.branch, tree_z.basis_tree(), base_tree, 
 
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                    this_tree=tree_a)
 
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        self.assertEqual([
 
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            conflicts.DeletingParent('Not deleting', 'b', 'b-id'),
 
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            conflicts.UnversionedParent('Versioned directory', 'b', 'b-id')],
 
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            tree_a.conflicts())
 
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    def test_nested_merge(self):
 
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        tree = self.make_branch_and_tree('tree', format='experimental-reference-dirstate')
 
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        sub_tree = self.make_branch_and_tree('tree/sub-tree',
 
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                                             format='experimental-reference-dirstate')
 
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        sub_tree.set_root_id('sub-tree-root')
 
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        self.build_tree_contents([('tree/sub-tree/file', 'text1')])
 
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        sub_tree.add('file')
 
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        sub_tree.commit('foo')
 
192
        tree.add_reference(sub_tree)
 
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        tree.commit('set text to 1')
 
194
        tree2 = tree.bzrdir.sprout('tree2').open_workingtree()
 
195
        self.build_tree_contents([('tree2/sub-tree/file', 'text2')])
 
196
        tree2.lock_write()
 
197
        try:
 
198
            subtree2 = tree2.get_nested_tree(tree2.inventory['sub-tree-root'],
 
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                                             'sub-tree')
 
200
            tree2.commit('changed file text')
 
201
        finally:
 
202
            tree2.unlock()
 
203
        tree.merge_from_branch(tree2.branch)
 
204
        self.assertFileEqual('text2', 'tree/sub-tree/file')
 
205
 
 
206
    def test_merge_with_missing(self):
 
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        tree_a = self.make_branch_and_tree('tree_a')
 
208
        self.build_tree_contents([('tree_a/file', 'content_1')])
 
209
        tree_a.add('file')
 
210
        tree_a.commit('commit base')
 
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        # basis_tree() is only guaranteed to be valid as long as it is actually
 
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        # the basis tree. This mutates the tree after grabbing basis, so go to
 
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        # the repository.
 
214
        base_tree = tree_a.branch.repository.revision_tree(tree_a.last_revision())
 
215
        tree_b = tree_a.bzrdir.sprout('tree_b').open_workingtree()
 
216
        self.build_tree_contents([('tree_a/file', 'content_2')])
 
217
        tree_a.commit('commit other')
 
218
        other_tree = tree_a.basis_tree()
 
219
        os.unlink('tree_b/file')
 
220
        merge_inner(tree_b.branch, other_tree, base_tree, this_tree=tree_b)
 
221
 
 
222
    def test_merge_kind_change(self):
 
223
        tree_a = self.make_branch_and_tree('tree_a')
 
224
        self.build_tree_contents([('tree_a/file', 'content_1')])
 
225
        tree_a.add('file', 'file-id')
 
226
        tree_a.commit('added file')
 
227
        tree_b = tree_a.bzrdir.sprout('tree_b').open_workingtree()
 
228
        os.unlink('tree_a/file')
 
229
        self.build_tree(['tree_a/file/'])
 
230
        tree_a.commit('changed file to directory')
 
231
        tree_b.merge_from_branch(tree_a.branch)
 
232
        self.assertEqual('directory', file_kind('tree_b/file'))
 
233
        tree_b.revert([])
 
234
        self.assertEqual('file', file_kind('tree_b/file'))
 
235
        self.build_tree_contents([('tree_b/file', 'content_2')])
 
236
        tree_b.commit('content change')
 
237
        tree_b.merge_from_branch(tree_a.branch)
 
238
        self.assertEqual(tree_b.conflicts(),
 
239
                         [conflicts.ContentsConflict('file',
 
240
                          file_id='file-id')])
 
241
    
 
242
    def test_merge_type_registry(self):
 
243
        merge_type_option = option.Option.OPTIONS['merge-type']
 
244
        self.assertFalse('merge4' in [x[0] for x in 
 
245
                        merge_type_option.iter_switches()])
 
246
        registry = _mod_merge.get_merge_type_registry()
 
247
        registry.register_lazy('merge4', 'bzrlib.merge', 'Merge4Merger',
 
248
                               'time-travelling merge')
 
249
        self.assertTrue('merge4' in [x[0] for x in 
 
250
                        merge_type_option.iter_switches()])
 
251
        registry.remove('merge4')
 
252
        self.assertFalse('merge4' in [x[0] for x in 
 
253
                        merge_type_option.iter_switches()])