Mercurial > hg
view tests/test-simplemerge.py @ 33289:abd7dedbaa36
sparse: vendor Facebook-developed extension
Facebook has developed an extension to enable "sparse" checkouts -
a working directory with a subset of files. This feature is a critical
component in enabling repositories to scale to infinite number of
files while retaining reasonable performance. It's worth noting
that sparse checkout is only one possible solution to this problem:
another is virtual filesystems that realize files on first access.
But given that virtual filesystems may not be accessible to all
users, sparse checkout is necessary as a fallback.
Per mailing list discussion at
https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-March/095868.html
we want to add sparse checkout to the Mercurial distribution via
roughly the following mechanism:
1. Vendor extension as-is with minimal modifications (this patch)
2. Refactor extension so it is more clearly experimental and inline
with Mercurial practices
3. Move code from extension into core where possible
4. Drop experimental labeling and/or move feature into core
after sign-off from narrow clone feature owners
This commit essentially copies the sparse extension and tests
from revision 71e0a2aeca92a4078fe1b8c76e32c88ff1929737 of the
https://bitbucket.org/facebook/hg-experimental repository.
A list of modifications made as part of vendoring is as follows:
* "EXPERIMENTAL" added to module docstring
* Imports were changed to match Mercurial style conventions
* "testedwith" value was updated to core Mercurial special value and
comment boilerplate was inserted
* A "clone_sparse" function was renamed to "clonesparse" to appease
the style checker
* Paths to the sparse extension in tests reflect built-in location
* test-sparse-extensions.t was renamed to test-sparse-fsmonitor.t
and references to "simplecache" were removed. The test always skips
because it isn't trivial to run it given the way we currently run
fsmonitor tests
* A double empty line was removed from test-sparse-profiles.t
There are aspects of the added code that are obviously not ideal.
The goal is to make a minimal number of modifications as part of
the vendoring to make it easier to track changes from the original
implementation. Refactoring will occur in subsequent patches.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sat, 01 Jul 2017 10:43:29 -0700 |
parents | 68c43a416585 |
children | f0b6fbea00cf |
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# 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/>. from __future__ import absolute_import import unittest from mercurial import ( error, simplemerge, util, ) TestCase = unittest.TestCase # 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 error.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): return util.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): with self.assertRaises(error.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