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# Copyright (C) 2004, 2005 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, see <http://www.gnu.org/licenses/>.
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import unittest
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from unittest import TestCase
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from mercurial import util, simplemerge
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# bzr compatible interface, for the tests
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class Merge3(simplemerge.Merge3Text):
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"""3-way merge of texts.
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Given BASE, OTHER, THIS, tries to produce a combined text
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incorporating the changes from both BASE->OTHER and BASE->THIS.
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All three will typically be sequences of lines."""
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def __init__(self, base, a, b):
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basetext = '\n'.join([i.strip('\n') for i in base] + [''])
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atext = '\n'.join([i.strip('\n') for i in a] + [''])
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btext = '\n'.join([i.strip('\n') for i in b] + [''])
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if util.binary(basetext) or util.binary(atext) or util.binary(btext):
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raise util.Abort("don't know how to merge binary files")
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simplemerge.Merge3Text.__init__(self, basetext, atext, btext,
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base, a, b)
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CantReprocessAndShowBase = simplemerge.CantReprocessAndShowBase
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def split_lines(t):
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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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# common base
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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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The two are the same,
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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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""")
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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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The two are the same,
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But after they are produced,
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they have different names.
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""")
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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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The two are the same,
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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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""")
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MERGED_RESULT = split_lines("""\
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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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The two are the same,
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But after they are produced,
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they have different names.
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<<<<<<< LAO
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=======
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-- The Way of Lao-Tzu, tr. Wing-tsit Chan
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>>>>>>> TAO
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""")
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class TestMerge3(TestCase):
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def log(self, msg):
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pass
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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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['aaa', 'bbb'],
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['aaa', 'bbb'])
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self.assertEquals(m3.find_unconflicted(),
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[(0, 2)])
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self.assertEquals(list(m3.find_sync_regions()),
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[(0, 2,
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0, 2,
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0, 2),
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(2, 2, 2, 2, 2, 2)])
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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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m3 = Merge3(['zz'],
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['aaa', 'bbb', 'zz'],
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['zz'])
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# todo: should use a sentinel 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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[(0, 1, 2, 3, 0, 1),
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(1, 1, 3, 3, 1, 1)])
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self.assertEquals(list(m3.merge_regions()),
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[('a', 0, 2),
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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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m3 = Merge3([],
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['aaa', 'bbb'],
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[])
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# todo: should use a sentinel 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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[(0, 0, 2, 2, 0, 0)])
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self.assertEquals(list(m3.merge_regions()),
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[('a', 0, 2)])
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self.assertEquals(list(m3.merge_lines()),
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['aaa', 'bbb'])
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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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['aaa', 'bbb'])
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self.assertEquals(m3.find_unconflicted(),
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[(0, 1), (1, 2)])
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self.assertEquals(list(m3.find_sync_regions()),
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[(0, 1, 0, 1, 0, 1),
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(1, 2, 2, 3, 1, 2),
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(2, 2, 3, 3, 2, 2)])
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self.assertEquals(list(m3.merge_regions()),
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[('unchanged', 0, 1),
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('a', 1, 2),
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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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['aaa\n', 'bbb\n'])
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self.assertEquals(''.join(m3.merge_lines()),
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'aaa\nbbb\n222\n')
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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'],
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['aaa\n', 'bbb\n', '222\n'])
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self.assertEquals(''.join(m3.merge_lines()),
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'aaa\nbbb\n222\n')
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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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'aaa\nbbb\n222\n')
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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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name_b='b',
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start_marker='<<',
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mid_marker='--',
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end_marker='>>')
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self.assertEquals(''.join(ml),
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'aaa\n'
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'bbb\n'
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'<< a\n'
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'222\n'
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'--\n'
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'333\n'
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'>> b\n'
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)
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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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name_b='b',
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start_marker='<<',
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mid_marker='--',
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end_marker='>>')
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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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[(0, 1), (1, 2)])
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self.assertEquals(list(m3.find_sync_regions()),
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[(0, 1, 0, 1, 0, 1),
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(1, 2, 2, 3, 2, 3),
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(2, 2, 3, 3, 3, 3)])
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self.assertEquals(list(m3.merge_regions()),
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[('unchanged', 0, 1),
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('conflict', 1, 1, 1, 2, 1, 2),
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('unchanged', 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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])
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ml = m3.merge_lines(name_a='a',
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name_b='b',
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start_marker='<<',
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mid_marker='--',
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end_marker='>>')
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self.assertEquals(''.join(ml),
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'''aaa
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<< a
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111
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--
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222
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>> b
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bbb
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''')
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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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[(0, 1), (2, 3)])
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self.assertEquals(list(m3.find_sync_regions()),
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[(0, 1, 0, 1, 0, 1),
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(2, 3, 2, 3, 2, 3),
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(3, 3, 3, 3, 3, 3)])
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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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[(0, 1), (3, 4)])
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self.assertEquals(list(m3.find_sync_regions()),
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[(0, 1, 0, 1, 0, 1),
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(3, 4, 4, 5, 5, 6),
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(4, 4, 5, 5, 6, 6)])
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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_binary(self):
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self.assertRaises(util.Abort, Merge3, ['\x00'], ['a'], ['b'])
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def test_dos_text(self):
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base_text = 'a\r\n'
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this_text = 'b\r\n'
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other_text = 'c\r\n'
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m3 = Merge3(base_text.splitlines(True), other_text.splitlines(True),
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this_text.splitlines(True))
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m_lines = m3.merge_lines('OTHER', 'THIS')
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self.assertEqual('<<<<<<< OTHER\r\nc\r\n=======\r\nb\r\n'
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'>>>>>>> THIS\r\n'.splitlines(True), list(m_lines))
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def test_mac_text(self):
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base_text = 'a\r'
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this_text = 'b\r'
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other_text = 'c\r'
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m3 = Merge3(base_text.splitlines(True), other_text.splitlines(True),
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this_text.splitlines(True))
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m_lines = m3.merge_lines('OTHER', 'THIS')
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self.assertEqual('<<<<<<< OTHER\rc\r=======\rb\r'
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'>>>>>>> THIS\r'.splitlines(True), list(m_lines))
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if __name__ == '__main__':
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# hide the timer
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import time
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orig = time.time
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try:
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time.time = lambda: 0
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unittest.main()
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finally:
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time.time = orig
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