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# Copyright (C) 2004, 2005 by Canonical Ltd
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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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# 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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# 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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from bzrlib.selftest import TestCaseInTempDir, TestCase
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from bzrlib.merge3 import Merge3
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from bzrlib.errors import CantReprocessAndShowBase
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from cStringIO import StringIO
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return StringIO(t).readlines()
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############################################################
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# test case data from the gnu diffutils manual
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TZU = split_lines(""" The Nameless is the origin of Heaven and Earth;
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The named is the mother of all things.
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Therefore let there always be non-being,
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so we may see their subtlety,
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And let there always be being,
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so we may see their outcome.
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But after they are produced,
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they have different names.
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They both may be called deep and profound.
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Deeper and more profound,
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The door of all subtleties!
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LAO = split_lines(""" The Way that can be told of is not the eternal Way;
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The name that can be named is not the eternal name.
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The Nameless is the origin of Heaven and Earth;
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The Named is the mother of all things.
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Therefore let there always be non-being,
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so we may see their subtlety,
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And let there always be being,
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so we may see their outcome.
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But after they are produced,
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they have different names.
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TAO = split_lines(""" The Way that can be told of is not the eternal Way;
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The name that can be named is not the eternal name.
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The Nameless is the origin of Heaven and Earth;
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The named is the mother of all things.
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Therefore let there always be non-being,
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so we may see their subtlety,
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And let there always be being,
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so we may see their result.
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But after they are produced,
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they have different names.
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-- The Way of Lao-Tzu, tr. Wing-tsit Chan
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MERGED_RESULT = split_lines(""" The Way that can be told of is not the eternal Way;
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The name that can be named is not the eternal name.
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The Nameless is the origin of Heaven and Earth;
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The Named is the mother of all things.
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Therefore let there always be non-being,
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so we may see their subtlety,
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And let there always be being,
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so we may see their result.
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But after they are produced,
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they have different names.
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-- The Way of Lao-Tzu, tr. Wing-tsit Chan
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class TestMerge3(TestCase):
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def test_no_changes(self):
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"""No conflicts because nothing changed"""
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m3 = Merge3(['aaa', 'bbb'],
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self.assertEquals(m3.find_unconflicted(),
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self.assertEquals(list(m3.find_sync_regions()),
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self.assertEquals(list(m3.merge_regions()),
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[('unchanged', 0, 2)])
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self.assertEquals(list(m3.merge_groups()),
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[('unchanged', ['aaa', 'bbb'])])
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def test_front_insert(self):
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['aaa', 'bbb', 'zz'],
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# todo: should use a sentinal at end as from get_matching_blocks
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# to match without zz
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self.assertEquals(list(m3.find_sync_regions()),
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self.assertEquals(list(m3.merge_regions()),
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('unchanged', 0, 1)])
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self.assertEquals(list(m3.merge_groups()),
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[('a', ['aaa', 'bbb']),
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('unchanged', ['zz'])])
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def test_null_insert(self):
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# todo: should use a sentinal at end as from get_matching_blocks
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# to match without zz
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self.assertEquals(list(m3.find_sync_regions()),
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self.assertEquals(list(m3.merge_regions()),
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self.assertEquals(list(m3.merge_lines()),
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def test_no_conflicts(self):
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"""No conflicts because only one side changed"""
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m3 = Merge3(['aaa', 'bbb'],
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['aaa', '111', 'bbb'],
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self.assertEquals(m3.find_unconflicted(),
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self.assertEquals(list(m3.find_sync_regions()),
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self.assertEquals(list(m3.merge_regions()),
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[('unchanged', 0, 1),
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('unchanged', 1, 2),])
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def test_append_a(self):
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m3 = Merge3(['aaa\n', 'bbb\n'],
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['aaa\n', 'bbb\n', '222\n'],
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self.assertEquals(''.join(m3.merge_lines()),
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def test_append_b(self):
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m3 = Merge3(['aaa\n', 'bbb\n'],
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['aaa\n', 'bbb\n', '222\n'])
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self.assertEquals(''.join(m3.merge_lines()),
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def test_append_agreement(self):
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m3 = Merge3(['aaa\n', 'bbb\n'],
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['aaa\n', 'bbb\n', '222\n'],
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['aaa\n', 'bbb\n', '222\n'])
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self.assertEquals(''.join(m3.merge_lines()),
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def test_append_clash(self):
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m3 = Merge3(['aaa\n', 'bbb\n'],
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['aaa\n', 'bbb\n', '222\n'],
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['aaa\n', 'bbb\n', '333\n'])
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ml = m3.merge_lines(name_a='a',
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self.assertEquals(''.join(ml),
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def test_insert_agreement(self):
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m3 = Merge3(['aaa\n', 'bbb\n'],
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['aaa\n', '222\n', 'bbb\n'],
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['aaa\n', '222\n', 'bbb\n'])
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ml = m3.merge_lines(name_a='a',
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self.assertEquals(''.join(ml), 'aaa\n222\nbbb\n')
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def test_insert_clash(self):
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"""Both try to insert lines in the same place."""
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m3 = Merge3(['aaa\n', 'bbb\n'],
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['aaa\n', '111\n', 'bbb\n'],
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['aaa\n', '222\n', 'bbb\n'])
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self.assertEquals(m3.find_unconflicted(),
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self.assertEquals(list(m3.find_sync_regions()),
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self.assertEquals(list(m3.merge_regions()),
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('conflict', 1,1, 1,2, 1,2),
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self.assertEquals(list(m3.merge_groups()),
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[('unchanged', ['aaa\n']),
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('conflict', [], ['111\n'], ['222\n']),
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('unchanged', ['bbb\n']),
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ml = m3.merge_lines(name_a='a',
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self.assertEquals(''.join(ml),
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def test_replace_clash(self):
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"""Both try to insert lines in the same place."""
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m3 = Merge3(['aaa', '000', 'bbb'],
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['aaa', '111', 'bbb'],
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['aaa', '222', 'bbb'])
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self.assertEquals(m3.find_unconflicted(),
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self.assertEquals(list(m3.find_sync_regions()),
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def test_replace_multi(self):
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"""Replacement with regions of different size."""
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m3 = Merge3(['aaa', '000', '000', 'bbb'],
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['aaa', '111', '111', '111', 'bbb'],
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['aaa', '222', '222', '222', '222', 'bbb'])
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self.assertEquals(m3.find_unconflicted(),
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self.assertEquals(list(m3.find_sync_regions()),
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def test_merge_poem(self):
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"""Test case from diff3 manual"""
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m3 = Merge3(TZU, LAO, TAO)
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ml = list(m3.merge_lines('LAO', 'TAO'))
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self.log('merge result:')
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self.log(''.join(ml))
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self.assertEquals(ml, MERGED_RESULT)
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def test_minimal_conflicts(self):
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base_text = ("a\n" * 20).splitlines(True)
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this_text = ("a\n"*10+"b\n" * 10).splitlines(True)
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other_text = ("a\n"*10+"c\n"+"b\n" * 8 + "c\n").splitlines(True)
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m3 = Merge3(base_text, other_text, this_text)
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m_lines = m3.merge_lines('OTHER', 'THIS', reprocess=True)
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merged_text = "".join(list(m_lines))
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optimal_text = "a\n" * 10 + "<<<<<<< OTHER\nc\n=======\n>>>>>>> THIS"\
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+ "\n" + 8* "b\n" + "<<<<<<< OTHER\nc\n=======\nb\nb\n>>>>>>>"\
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self.assertEqualDiff(merged_text, optimal_text)
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def test_reprocess_and_base(self):
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"""Reprocessing and showing base breaks correctly"""
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base_text = ("a\n" * 20).splitlines(True)
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this_text = ("a\n"*10+"b\n" * 10).splitlines(True)
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other_text = ("a\n"*10+"c\n"+"b\n" * 8 + "c\n").splitlines(True)
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m3 = Merge3(base_text, other_text, this_text)
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m_lines = m3.merge_lines('OTHER', 'THIS', reprocess=True,
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base_marker='|||||||')
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self.assertRaises(CantReprocessAndShowBase, list, m_lines)
added
removed
bzrlib/selftest/testmerge3.py
