view tests/test-simplemerge.py @ 25867:a74e9806d17d stable

highlight: produce correct markup when there's a blank line just before EOF

Due to how the colorized output from pygments was stripped of <pre> elements,
when there was an empty line at the end of a file, highlight extension produced
an incorrect markup (no closing tags from the fileline/annotateline template).
It wasn't usually noticeable, because browsers were smart enough to see where
the missing tags should've been, but in monoblue style it resulted in the last
line having twice the normal height.

Instead of awkwardly trying to strip outer <pre></pre> tags, let's make the
formatter with nowrap=True, which should do what we need in pygments since at
least 0.5 (2006-10-30).

Example from monoblue style:

Before:

    <div class="source">

<div style="font-family:monospace" class="parity0">
<pre><a class="linenr" href="#l1" id="l1">     1</a> </pre>
</div>
<div style="font-family:monospace" class="parity1">
<pre><a class="linenr" href="#l2" id="l2">     2</a>
    </div>

Now:

    <div class="source">

<div style="font-family:monospace" class="parity0">
<pre><a class="linenr" href="#l1" id="l1">     1</a> </pre>
</div>
<div style="font-family:monospace" class="parity1">
<pre><a class="linenr" href="#l2" id="l2">     2</a> </pre>
</div>
    </div>

(Notice the missing </pre></div> now in place)

# Copyright (C) 2004, 2005 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <http://www.gnu.org/licenses/>.

import unittest
from unittest import TestCase
from mercurial import util, simplemerge

# bzr compatible interface, for the tests
class Merge3(simplemerge.Merge3Text):
    """3-way merge of texts.

    Given BASE, OTHER, THIS, tries to produce a combined text
    incorporating the changes from both BASE->OTHER and BASE->THIS.
    All three will typically be sequences of lines."""
    def __init__(self, base, a, b):
        basetext = '\n'.join([i.strip('\n') for i in base] + [''])
        atext = '\n'.join([i.strip('\n') for i in a] + [''])
        btext = '\n'.join([i.strip('\n') for i in b] + [''])
        if util.binary(basetext) or util.binary(atext) or util.binary(btext):
            raise util.Abort("don't know how to merge binary files")
        simplemerge.Merge3Text.__init__(self, basetext, atext, btext,
                                        base, a, b)

CantReprocessAndShowBase = simplemerge.CantReprocessAndShowBase

def split_lines(t):
    from cStringIO import StringIO
    return StringIO(t).readlines()

############################################################
# test case data from the gnu diffutils manual
# common base
TZU = split_lines("""     The Nameless is the origin of Heaven and Earth;
     The named is the mother of all things.

     Therefore let there always be non-being,
       so we may see their subtlety,
     And let there always be being,
       so we may see their outcome.
     The two are the same,
     But after they are produced,
       they have different names.
     They both may be called deep and profound.
     Deeper and more profound,
     The door of all subtleties!
""")

LAO = split_lines("""     The Way that can be told of is not the eternal Way;
     The name that can be named is not the eternal name.
     The Nameless is the origin of Heaven and Earth;
     The Named is the mother of all things.
     Therefore let there always be non-being,
       so we may see their subtlety,
     And let there always be being,
       so we may see their outcome.
     The two are the same,
     But after they are produced,
       they have different names.
""")


TAO = split_lines("""     The Way that can be told of is not the eternal Way;
     The name that can be named is not the eternal name.
     The Nameless is the origin of Heaven and Earth;
     The named is the mother of all things.

     Therefore let there always be non-being,
       so we may see their subtlety,
     And let there always be being,
       so we may see their result.
     The two are the same,
     But after they are produced,
       they have different names.

       -- The Way of Lao-Tzu, tr. Wing-tsit Chan

""")

MERGED_RESULT = split_lines("""\
     The Way that can be told of is not the eternal Way;
     The name that can be named is not the eternal name.
     The Nameless is the origin of Heaven and Earth;
     The Named is the mother of all things.
     Therefore let there always be non-being,
       so we may see their subtlety,
     And let there always be being,
       so we may see their result.
     The two are the same,
     But after they are produced,
       they have different names.
<<<<<<< LAO
=======

       -- The Way of Lao-Tzu, tr. Wing-tsit Chan

>>>>>>> TAO
""")

class TestMerge3(TestCase):
    def log(self, msg):
        pass

    def test_no_changes(self):
        """No conflicts because nothing changed"""
        m3 = Merge3(['aaa', 'bbb'],
                    ['aaa', 'bbb'],
                    ['aaa', 'bbb'])

        self.assertEquals(m3.find_unconflicted(),
                          [(0, 2)])

        self.assertEquals(list(m3.find_sync_regions()),
                          [(0, 2,
                            0, 2,
                            0, 2),
                           (2, 2,  2, 2,  2, 2)])

        self.assertEquals(list(m3.merge_regions()),
                          [('unchanged', 0, 2)])

        self.assertEquals(list(m3.merge_groups()),
                          [('unchanged', ['aaa', 'bbb'])])

    def test_front_insert(self):
        m3 = Merge3(['zz'],
                    ['aaa', 'bbb', 'zz'],
                    ['zz'])

        # todo: should use a sentinel at end as from get_matching_blocks
        # to match without zz
        self.assertEquals(list(m3.find_sync_regions()),
                          [(0, 1,  2, 3,  0, 1),
                           (1, 1,  3, 3,  1, 1)])

        self.assertEquals(list(m3.merge_regions()),
                          [('a', 0, 2),
                           ('unchanged', 0, 1)])

        self.assertEquals(list(m3.merge_groups()),
                          [('a', ['aaa', 'bbb']),
                           ('unchanged', ['zz'])])

    def test_null_insert(self):
        m3 = Merge3([],
                    ['aaa', 'bbb'],
                    [])
        # todo: should use a sentinel at end as from get_matching_blocks
        # to match without zz
        self.assertEquals(list(m3.find_sync_regions()),
                          [(0, 0,  2, 2,  0, 0)])

        self.assertEquals(list(m3.merge_regions()),
                          [('a', 0, 2)])

        self.assertEquals(list(m3.merge_lines()),
                          ['aaa', 'bbb'])

    def test_no_conflicts(self):
        """No conflicts because only one side changed"""
        m3 = Merge3(['aaa', 'bbb'],
                    ['aaa', '111', 'bbb'],
                    ['aaa', 'bbb'])

        self.assertEquals(m3.find_unconflicted(),
                          [(0, 1), (1, 2)])

        self.assertEquals(list(m3.find_sync_regions()),
                          [(0, 1,  0, 1,  0, 1),
                           (1, 2,  2, 3,  1, 2),
                           (2, 2,  3, 3,  2, 2)])

        self.assertEquals(list(m3.merge_regions()),
                          [('unchanged', 0, 1),
                           ('a', 1, 2),
                           ('unchanged', 1, 2)])

    def test_append_a(self):
        m3 = Merge3(['aaa\n', 'bbb\n'],
                    ['aaa\n', 'bbb\n', '222\n'],
                    ['aaa\n', 'bbb\n'])

        self.assertEquals(''.join(m3.merge_lines()),
                          'aaa\nbbb\n222\n')

    def test_append_b(self):
        m3 = Merge3(['aaa\n', 'bbb\n'],
                    ['aaa\n', 'bbb\n'],
                    ['aaa\n', 'bbb\n', '222\n'])

        self.assertEquals(''.join(m3.merge_lines()),
                          'aaa\nbbb\n222\n')

    def test_append_agreement(self):
        m3 = Merge3(['aaa\n', 'bbb\n'],
                    ['aaa\n', 'bbb\n', '222\n'],
                    ['aaa\n', 'bbb\n', '222\n'])

        self.assertEquals(''.join(m3.merge_lines()),
                          'aaa\nbbb\n222\n')

    def test_append_clash(self):
        m3 = Merge3(['aaa\n', 'bbb\n'],
                    ['aaa\n', 'bbb\n', '222\n'],
                    ['aaa\n', 'bbb\n', '333\n'])

        ml = m3.merge_lines(name_a='a',
                            name_b='b',
                            start_marker='<<',
                            mid_marker='--',
                            end_marker='>>')
        self.assertEquals(''.join(ml),
                          'aaa\n'
                          'bbb\n'
                          '<< a\n'
                          '222\n'
                          '--\n'
                          '333\n'
                          '>> b\n'
                         )

    def test_insert_agreement(self):
        m3 = Merge3(['aaa\n', 'bbb\n'],
                    ['aaa\n', '222\n', 'bbb\n'],
                    ['aaa\n', '222\n', 'bbb\n'])

        ml = m3.merge_lines(name_a='a',
                            name_b='b',
                            start_marker='<<',
                            mid_marker='--',
                            end_marker='>>')
        self.assertEquals(''.join(ml), 'aaa\n222\nbbb\n')


    def test_insert_clash(self):
        """Both try to insert lines in the same place."""
        m3 = Merge3(['aaa\n', 'bbb\n'],
                    ['aaa\n', '111\n', 'bbb\n'],
                    ['aaa\n', '222\n', 'bbb\n'])

        self.assertEquals(m3.find_unconflicted(),
                          [(0, 1), (1, 2)])

        self.assertEquals(list(m3.find_sync_regions()),
                          [(0, 1,  0, 1,  0, 1),
                           (1, 2,  2, 3,  2, 3),
                           (2, 2,  3, 3,  3, 3)])

        self.assertEquals(list(m3.merge_regions()),
                          [('unchanged', 0, 1),
                           ('conflict', 1, 1,  1, 2,  1, 2),
                           ('unchanged', 1, 2)])

        self.assertEquals(list(m3.merge_groups()),
                          [('unchanged', ['aaa\n']),
                           ('conflict', [], ['111\n'], ['222\n']),
                           ('unchanged', ['bbb\n']),
                           ])

        ml = m3.merge_lines(name_a='a',
                            name_b='b',
                            start_marker='<<',
                            mid_marker='--',
                            end_marker='>>')
        self.assertEquals(''.join(ml),
'''aaa
<< a
111
--
222
>> b
bbb
''')

    def test_replace_clash(self):
        """Both try to insert lines in the same place."""
        m3 = Merge3(['aaa', '000', 'bbb'],
                    ['aaa', '111', 'bbb'],
                    ['aaa', '222', 'bbb'])

        self.assertEquals(m3.find_unconflicted(),
                          [(0, 1), (2, 3)])

        self.assertEquals(list(m3.find_sync_regions()),
                          [(0, 1,  0, 1,  0, 1),
                           (2, 3,  2, 3,  2, 3),
                           (3, 3,  3, 3,  3, 3)])

    def test_replace_multi(self):
        """Replacement with regions of different size."""
        m3 = Merge3(['aaa', '000', '000', 'bbb'],
                    ['aaa', '111', '111', '111', 'bbb'],
                    ['aaa', '222', '222', '222', '222', 'bbb'])

        self.assertEquals(m3.find_unconflicted(),
                          [(0, 1), (3, 4)])


        self.assertEquals(list(m3.find_sync_regions()),
                          [(0, 1,  0, 1,  0, 1),
                           (3, 4,  4, 5,  5, 6),
                           (4, 4,  5, 5,  6, 6)])

    def test_merge_poem(self):
        """Test case from diff3 manual"""
        m3 = Merge3(TZU, LAO, TAO)
        ml = list(m3.merge_lines('LAO', 'TAO'))
        self.log('merge result:')
        self.log(''.join(ml))
        self.assertEquals(ml, MERGED_RESULT)

    def test_binary(self):
        self.assertRaises(util.Abort, Merge3, ['\x00'], ['a'], ['b'])

    def test_dos_text(self):
        base_text = 'a\r\n'
        this_text = 'b\r\n'
        other_text = 'c\r\n'
        m3 = Merge3(base_text.splitlines(True), other_text.splitlines(True),
                    this_text.splitlines(True))
        m_lines = m3.merge_lines('OTHER', 'THIS')
        self.assertEqual('<<<<<<< OTHER\r\nc\r\n=======\r\nb\r\n'
            '>>>>>>> THIS\r\n'.splitlines(True), list(m_lines))

    def test_mac_text(self):
        base_text = 'a\r'
        this_text = 'b\r'
        other_text = 'c\r'
        m3 = Merge3(base_text.splitlines(True), other_text.splitlines(True),
                    this_text.splitlines(True))
        m_lines = m3.merge_lines('OTHER', 'THIS')
        self.assertEqual('<<<<<<< OTHER\rc\r=======\rb\r'
            '>>>>>>> THIS\r'.splitlines(True), list(m_lines))

if __name__ == '__main__':
    # hide the timer
    import time
    orig = time.time
    try:
        time.time = lambda: 0
        unittest.main()
    finally:
        time.time = orig