1
# (C) 2005 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20
from bzrlib.branch import Branch
21
from bzrlib.errors import NoSuchRevision
22
from bzrlib.commit import commit
23
from bzrlib.graph import Graph
24
from bzrlib.revision import (find_present_ancestors, combined_graph,
26
is_ancestor, MultipleRevisionSources)
27
from bzrlib.tests import TestCaseWithTransport
28
from bzrlib.trace import mutter
29
from bzrlib.workingtree import WorkingTree
31
# XXX: Make this a method of a merge base case
32
def make_branches(self):
33
"""Create two branches
35
branch 1 has 6 commits, branch 2 has 3 commits
36
commit 10 is a ghosted merge merge from branch 1
48
so A is missing b6 at the start
49
and B is missing a3, a4, a5
51
tree1 = self.make_branch_and_tree("branch1")
54
tree1.commit("Commit one", rev_id="a@u-0-0")
55
tree1.commit("Commit two", rev_id="a@u-0-1")
56
tree1.commit("Commit three", rev_id="a@u-0-2")
58
tree2 = tree1.bzrdir.clone("branch2").open_workingtree()
60
tree2.commit("Commit four", rev_id="b@u-0-3")
61
tree2.commit("Commit five", rev_id="b@u-0-4")
62
revisions_2 = br2.revision_history()
65
tree1.add_pending_merge(revisions_2[4])
66
self.assertEquals(revisions_2[4], 'b@u-0-4')
67
tree1.commit("Commit six", rev_id="a@u-0-3")
68
tree1.commit("Commit seven", rev_id="a@u-0-4")
69
tree2.commit("Commit eight", rev_id="b@u-0-5")
72
tree1.add_pending_merge(br2.revision_history()[5])
73
tree1.commit("Commit nine", rev_id="a@u-0-5")
74
# DO NOT FETCH HERE - we WANT a GHOST.
76
tree2.add_pending_merge(br1.revision_history()[4])
77
tree2.commit("Commit ten - ghost merge", rev_id="b@u-0-6")
82
class TestIsAncestor(TestCaseWithTransport):
84
def test_recorded_ancestry(self):
85
"""Test that commit records all ancestors"""
86
br1, br2 = make_branches(self)
87
d = [('a@u-0-0', ['a@u-0-0']),
88
('a@u-0-1', ['a@u-0-0', 'a@u-0-1']),
89
('a@u-0-2', ['a@u-0-0', 'a@u-0-1', 'a@u-0-2']),
90
('b@u-0-3', ['a@u-0-0', 'a@u-0-1', 'a@u-0-2', 'b@u-0-3']),
91
('b@u-0-4', ['a@u-0-0', 'a@u-0-1', 'a@u-0-2', 'b@u-0-3',
93
('a@u-0-3', ['a@u-0-0', 'a@u-0-1', 'a@u-0-2', 'b@u-0-3', 'b@u-0-4',
95
('a@u-0-4', ['a@u-0-0', 'a@u-0-1', 'a@u-0-2', 'b@u-0-3', 'b@u-0-4',
96
'a@u-0-3', 'a@u-0-4']),
97
('b@u-0-5', ['a@u-0-0', 'a@u-0-1', 'a@u-0-2', 'b@u-0-3', 'b@u-0-4',
99
('a@u-0-5', ['a@u-0-0', 'a@u-0-1', 'a@u-0-2', 'a@u-0-3', 'a@u-0-4',
100
'b@u-0-3', 'b@u-0-4',
101
'b@u-0-5', 'a@u-0-5']),
102
('b@u-0-6', ['a@u-0-0', 'a@u-0-1', 'a@u-0-2',
103
'b@u-0-3', 'b@u-0-4',
104
'b@u-0-5', 'b@u-0-6']),
106
br1_only = ('a@u-0-3', 'a@u-0-4', 'a@u-0-5')
107
br2_only = ('b@u-0-6',)
108
for branch in br1, br2:
109
for rev_id, anc in d:
110
if rev_id in br1_only and not branch is br1:
112
if rev_id in br2_only and not branch is br2:
114
mutter('ancestry of {%s}: %r',
115
rev_id, branch.repository.get_ancestry(rev_id))
116
result = sorted(branch.repository.get_ancestry(rev_id))
117
self.assertEquals(result, [None] + sorted(anc))
120
def test_is_ancestor(self):
121
"""Test checking whether a revision is an ancestor of another revision"""
122
br1, br2 = make_branches(self)
123
revisions = br1.revision_history()
124
revisions_2 = br2.revision_history()
127
self.assert_(is_ancestor(revisions[0], revisions[0], br1))
128
self.assert_(is_ancestor(revisions[1], revisions[0], sources))
129
self.assert_(not is_ancestor(revisions[0], revisions[1], sources))
130
self.assert_(is_ancestor(revisions_2[3], revisions[0], sources))
131
# disabled mbp 20050914, doesn't seem to happen anymore
132
## self.assertRaises(NoSuchRevision, is_ancestor, revisions_2[3],
133
## revisions[0], br1)
134
self.assert_(is_ancestor(revisions[3], revisions_2[4], sources))
135
self.assert_(is_ancestor(revisions[3], revisions_2[4], br1))
136
self.assert_(is_ancestor(revisions[3], revisions_2[3], sources))
137
## self.assert_(not is_ancestor(revisions[3], revisions_2[3], br1))
140
class TestIntermediateRevisions(TestCaseWithTransport):
143
from bzrlib.commit import commit
144
TestCaseWithTransport.setUp(self)
145
self.br1, self.br2 = make_branches(self)
146
wt1 = self.br1.bzrdir.open_workingtree()
147
wt2 = self.br2.bzrdir.open_workingtree()
148
wt2.commit("Commit eleven", rev_id="b@u-0-7")
149
wt2.commit("Commit twelve", rev_id="b@u-0-8")
150
wt2.commit("Commit thirtteen", rev_id="b@u-0-9")
152
self.br1.fetch(self.br2)
153
wt1.add_pending_merge(self.br2.revision_history()[6])
154
wt1.commit("Commit fourtten", rev_id="a@u-0-6")
156
self.br2.fetch(self.br1)
157
wt2.add_pending_merge(self.br1.revision_history()[6])
158
wt2.commit("Commit fifteen", rev_id="b@u-0-10")
160
from bzrlib.revision import MultipleRevisionSources
161
self.sources = MultipleRevisionSources(self.br1.repository,
164
def intervene(self, ancestor, revision, revision_history=None):
165
from bzrlib.revision import get_intervening_revisions
166
return get_intervening_revisions(ancestor,revision, self.sources,
169
def test_intervene(self):
170
"""Find intermediate revisions, without requiring history"""
171
from bzrlib.errors import NotAncestor, NoSuchRevision
172
self.assertEquals(len(self.intervene('a@u-0-0', 'a@u-0-0')), 0)
173
self.assertEqual(self.intervene('a@u-0-0', 'a@u-0-1'), ['a@u-0-1'])
174
self.assertEqual(self.intervene('a@u-0-0', 'a@u-0-2'),
175
['a@u-0-1', 'a@u-0-2'])
176
self.assertEqual(self.intervene('a@u-0-0', 'b@u-0-3'),
177
['a@u-0-1', 'a@u-0-2', 'b@u-0-3'])
178
self.assertEqual(self.intervene('b@u-0-3', 'a@u-0-3'),
179
['b@u-0-4', 'a@u-0-3'])
180
self.assertEqual(self.intervene('a@u-0-2', 'a@u-0-3',
181
self.br1.revision_history()),
183
self.assertEqual(self.intervene('a@u-0-0', 'a@u-0-5',
184
self.br1.revision_history()),
185
['a@u-0-1', 'a@u-0-2', 'a@u-0-3', 'a@u-0-4',
187
self.assertEqual(self.intervene('a@u-0-0', 'b@u-0-6',
188
self.br1.revision_history()),
189
['a@u-0-1', 'a@u-0-2', 'a@u-0-3', 'a@u-0-4',
191
self.assertEqual(self.intervene('a@u-0-0', 'b@u-0-5'),
192
['a@u-0-1', 'a@u-0-2', 'b@u-0-3', 'b@u-0-4',
194
self.assertEqual(self.intervene('b@u-0-3', 'b@u-0-6',
195
self.br2.revision_history()),
196
['b@u-0-4', 'b@u-0-5', 'b@u-0-6'])
197
self.assertEqual(self.intervene('b@u-0-6', 'b@u-0-10'),
198
['b@u-0-7', 'b@u-0-8', 'b@u-0-9', 'b@u-0-10'])
199
self.assertEqual(self.intervene('b@u-0-6', 'b@u-0-10',
200
self.br2.revision_history()),
201
['b@u-0-7', 'b@u-0-8', 'b@u-0-9', 'b@u-0-10'])
202
self.assertRaises(NotAncestor, self.intervene, 'b@u-0-10', 'b@u-0-6',
203
self.br2.revision_history())
204
self.assertRaises(NoSuchRevision, self.intervene, 'c@u-0-10',
205
'b@u-0-6', self.br2.revision_history())
206
self.assertRaises(NoSuchRevision, self.intervene, 'b@u-0-10',
207
'c@u-0-6', self.br2.revision_history())
210
class MockRevisionSource(object):
211
"""A RevisionSource that takes a pregenerated graph.
213
This is useful for testing revision graph algorithms where
214
the actual branch existing is irrelevant.
217
def __init__(self, full_graph):
218
self._full_graph = full_graph
220
def get_revision_graph_with_ghosts(self, revision_ids):
221
# This is mocked out to just return a constant graph.
222
return self._full_graph
225
class TestCommonAncestor(TestCaseWithTransport):
226
"""Test checking whether a revision is an ancestor of another revision"""
228
def test_common_ancestor(self):
229
"""Pick a reasonable merge base"""
230
br1, br2 = make_branches(self)
231
revisions = br1.revision_history()
232
revisions_2 = br2.revision_history()
233
sources = MultipleRevisionSources(br1.repository, br2.repository)
234
expected_ancestors_list = {revisions[3]:(0, 0),
236
revisions_2[4]:(2, 1),
238
revisions_2[3]:(4, 2),
239
revisions[0]:(5, 3) }
240
ancestors_list = find_present_ancestors(revisions[3], sources)
241
self.assertEquals(len(expected_ancestors_list), len(ancestors_list))
242
for key, value in expected_ancestors_list.iteritems():
243
self.assertEqual(ancestors_list[key], value,
244
"key %r, %r != %r" % (key, ancestors_list[key],
246
self.assertEqual(common_ancestor(revisions[0], revisions[0], sources),
248
self.assertEqual(common_ancestor(revisions[1], revisions[2], sources),
250
self.assertEqual(common_ancestor(revisions[1], revisions[1], sources),
252
self.assertEqual(common_ancestor(revisions[2], revisions_2[4], sources),
254
self.assertEqual(common_ancestor(revisions[3], revisions_2[4], sources),
256
self.assertEqual(common_ancestor(revisions[4], revisions_2[5], sources),
258
self.assertTrue(common_ancestor(revisions[5], revisions_2[6], sources) in
259
(revisions[4], revisions_2[5]))
260
self.assertTrue(common_ancestor(revisions_2[6], revisions[5], sources),
261
(revisions[4], revisions_2[5]))
262
self.assertEqual(None, common_ancestor(None, revisions[5], sources))
264
def test_combined(self):
266
Ensure it's not order-sensitive
268
br1, br2 = make_branches(self)
269
source = MultipleRevisionSources(br1.repository, br2.repository)
270
combined_1 = combined_graph(br1.last_revision(),
271
br2.last_revision(), source)
272
combined_2 = combined_graph(br2.last_revision(),
273
br1.last_revision(), source)
274
self.assertEquals(combined_1[1], combined_2[1])
275
self.assertEquals(combined_1[2], combined_2[2])
276
self.assertEquals(combined_1[3], combined_2[3])
277
self.assertEquals(combined_1, combined_2)
279
def test_get_history(self):
280
# TODO: test ghosts on the left hand branch's impact
281
# TODO: test ghosts on all parents, we should get some
282
# indicator. i.e. NULL_REVISION
284
tree = self.make_branch_and_tree('.')
285
tree.commit('1', rev_id = '1', allow_pointless=True)
286
tree.commit('2', rev_id = '2', allow_pointless=True)
287
tree.commit('3', rev_id = '3', allow_pointless=True)
288
rev = tree.branch.repository.get_revision('1')
289
history = rev.get_history(tree.branch.repository)
290
self.assertEqual([None, '1'], history)
291
rev = tree.branch.repository.get_revision('2')
292
history = rev.get_history(tree.branch.repository)
293
self.assertEqual([None, '1', '2'], history)
294
rev = tree.branch.repository.get_revision('3')
295
history = rev.get_history(tree.branch.repository)
296
self.assertEqual([None, '1', '2' ,'3'], history)
298
def test_common_ancestor_rootless_graph(self):
299
# common_ancestor on a graph with no reachable roots - only
300
# ghosts - should still return a useful value.
302
# add a ghost node which would be a root if it wasn't a ghost.
303
graph.add_ghost('a_ghost')
304
# add a normal commit on top of that
305
graph.add_node('rev1', ['a_ghost'])
306
# add a left-branch revision
307
graph.add_node('left', ['rev1'])
308
# add a right-branch revision
309
graph.add_node('right', ['rev1'])
310
source = MockRevisionSource(graph)
311
self.assertEqual('rev1', common_ancestor('left', 'right', source))
314
class TestMultipleRevisionSources(TestCaseWithTransport):
315
"""Tests for the MultipleRevisionSources adapter."""
317
def test_get_revision_graph_merges_ghosts(self):
318
# when we ask for the revision graph for B, which
319
# is in repo 1 with a ghost of A, and which is not
320
# in repo 2, which has A, the revision_graph()
321
# should return A and B both.
322
tree_1 = self.make_branch_and_tree('1')
323
tree_1.add_pending_merge('A')
324
tree_1.commit('foo', rev_id='B', allow_pointless=True)
325
tree_2 = self.make_branch_and_tree('2')
326
tree_2.commit('bar', rev_id='A', allow_pointless=True)
327
source = MultipleRevisionSources(tree_1.branch.repository,
328
tree_2.branch.repository)
329
self.assertEqual({'B':['A'],
331
source.get_revision_graph('B'))