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Viewing changes to bzrlib/tests/test_commit_merge.py

  • Committer: Canonical.com Patch Queue Manager
  • Date: 2010-01-21 10:00:42 UTC
  • mfrom: (4978.1.2 integration)
  • Revision ID: pqm@pqm.ubuntu.com-20100121100042-77858a88k2zpec7b
(nmb) Add documentation for multi-parent merges

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bzrlib/tests/test_commit_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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
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import os
 
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import shutil
 
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from bzrlib import check, osutils
 
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from bzrlib.branch import Branch
 
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from bzrlib.errors import PointlessCommit, BzrError
 
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from bzrlib.tests import (
 
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    SymlinkFeature,
 
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    TestCaseWithTransport,
 
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    )
 
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from bzrlib.tests.test_revision import make_branches
 
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class TestCommitMerge(TestCaseWithTransport):
 
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    """Tests for committing the results of a merge.
 
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    These don't currently test the merge code, which is intentional to
 
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    reduce the scope of testing.  We just mark the revision as merged
 
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    without bothering about the contents much."""
 
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    def test_merge_commit_empty(self):
 
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        """Simple commit of two-way merge of empty trees."""
 
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        wtx = self.make_branch_and_tree('x')
 
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        base_rev = wtx.commit('common parent')
 
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        bx = wtx.branch
 
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        wty = wtx.bzrdir.sprout('y').open_workingtree()
 
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        by = wty.branch
 
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        wtx.commit('commit one', rev_id='x@u-0-1', allow_pointless=True)
 
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        wty.commit('commit two', rev_id='y@u-0-1', allow_pointless=True)
 
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        by.fetch(bx)
 
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        # just having the history there does nothing
 
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        self.assertRaises(PointlessCommit,
 
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                          wty.commit,
 
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                          'no changes yet', rev_id='y@u-0-2',
 
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                          allow_pointless=False)
 
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        wty.merge_from_branch(bx)
 
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        wty.commit('merge from x', rev_id='y@u-0-2', allow_pointless=False)
 
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        self.assertEquals(by.revno(), 3)
 
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        self.assertEquals(list(by.revision_history()),
 
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                          [base_rev, 'y@u-0-1', 'y@u-0-2'])
 
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        rev = by.repository.get_revision('y@u-0-2')
 
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        self.assertEquals(rev.parent_ids,
 
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                          ['y@u-0-1', 'x@u-0-1'])
 
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    def test_merge_new_file(self):
 
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        """Commit merge of two trees with no overlapping files."""
 
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        wtx = self.make_branch_and_tree('x')
 
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        base_rev = wtx.commit('common parent')
 
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        bx = wtx.branch
 
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        wtx.commit('establish root id')
 
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        wty = wtx.bzrdir.sprout('y').open_workingtree()
 
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        self.assertEqual(wtx.get_root_id(), wty.get_root_id())
 
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        by = wty.branch
 
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        self.build_tree(['x/ecks', 'y/why'])
 
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        wtx.add(['ecks'], ['ecks-id'])
 
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        wty.add(['why'], ['why-id'])
 
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        wtx.commit('commit one', rev_id='x@u-0-1', allow_pointless=True)
 
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        wty.commit('commit two', rev_id='y@u-0-1', allow_pointless=True)
 
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        wty.merge_from_branch(bx)
 
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        # partial commit of merges is currently not allowed, because
 
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        # it would give different merge graphs for each file which
 
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        # might be complex.  it can be allowed in the future.
 
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        self.assertRaises(Exception,
 
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                          wty.commit,
 
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                          'partial commit', allow_pointless=False,
 
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                          specific_files=['ecks'])
 
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        wty.commit('merge from x', rev_id='y@u-0-2', allow_pointless=False)
 
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        tree = by.repository.revision_tree('y@u-0-2')
 
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        inv = tree.inventory
 
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        self.assertEquals(inv['ecks-id'].revision, 'x@u-0-1')
 
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        self.assertEquals(inv['why-id'].revision, 'y@u-0-1')
 
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        check.check_dwim(bx.base, False, True, True)
 
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        check.check_dwim(by.base, False, True, True)
 
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    def test_merge_with_symlink(self):
 
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        self.requireFeature(SymlinkFeature)
 
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        tree_a = self.make_branch_and_tree('tree_a')
 
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        os.symlink('target', osutils.pathjoin('tree_a', 'link'))
 
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        tree_a.add('link')
 
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        tree_a.commit('added link')
 
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        tree_b = tree_a.bzrdir.sprout('tree_b').open_workingtree()
 
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        self.build_tree(['tree_a/file'])
 
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        tree_a.add('file')
 
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        tree_a.commit('added file')
 
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        self.build_tree(['tree_b/another_file'])
 
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        tree_b.add('another_file')
 
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        tree_b.commit('add another file')
 
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        tree_b.merge_from_branch(tree_a.branch)
 
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        tree_b.commit('merge')