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bzrlib/selftest/testrevision.py
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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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18
import os
 
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from bzrlib.selftest import TestCaseInTempDir
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20
 
def make_branches():
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    from bzrlib.branch import Branch
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    from bzrlib.commit import commit
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    import os
 
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from bzrlib.branch import Branch
 
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from bzrlib.commit import commit
 
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from bzrlib.fetch import fetch
 
24
from bzrlib.revision import (find_present_ancestors, combined_graph,
 
25
                             is_ancestor, MultipleRevisionSources)
 
26
from bzrlib.trace import mutter
 
27
from bzrlib.errors import NoSuchRevision
 
28
 
 
29
# XXX: Make this a method of a merge base case
 
30
def make_branches(self):
 
31
    """Create two branches
 
32
 
 
33
    branch 1 has 6 commits, branch 2 has 3 commits
 
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    commit 10 was a psuedo merge from branch 1
 
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    but has been disabled until ghost support is
 
36
    implemented.
 
37
 
 
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    the object graph is
 
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    B:     A:
 
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    a..0   a..0 
 
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    a..1   a..1
 
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    a..2   a..2
 
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    b..3   a..3 merges b..4
 
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    b..4   a..4
 
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    b..5   a..5 merges b..5
 
46
    b..6 merges a4
 
47
 
 
48
    so A is missing b6 at the start
 
49
    and B is missing a3, a4, a5
 
50
    """
24
51
    os.mkdir("branch1")
25
 
    br1 = Branch("branch1", init=True)
 
52
    br1 = Branch.initialize("branch1")
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53
    
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    commit(br1, "Commit one", rev_id="a@u-0-0")
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    commit(br1, "Commit two", rev_id="a@u-0-1")
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56
    commit(br1, "Commit three", rev_id="a@u-0-2")
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57
 
31
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    os.mkdir("branch2")
32
 
    br2 = Branch("branch2", init=True)
 
59
    br2 = Branch.initialize("branch2")
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    br2.update_revisions(br1)
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    commit(br2, "Commit four", rev_id="b@u-0-3")
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    commit(br2, "Commit five", rev_id="b@u-0-4")
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63
    revisions_2 = br2.revision_history()
37
 
    br1.add_pending_merge(revisions_2[4])
 
64
    
 
65
    fetch(from_branch=br2, to_branch=br1)
 
66
    br1.working_tree().add_pending_merge(revisions_2[4])
 
67
    self.assertEquals(revisions_2[4], 'b@u-0-4')
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68
    commit(br1, "Commit six", rev_id="a@u-0-3")
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    commit(br1, "Commit seven", rev_id="a@u-0-4")
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70
    commit(br2, "Commit eight", rev_id="b@u-0-5")
41
 
    br1.add_pending_merge(br2.revision_history()[5])
 
71
    
 
72
    fetch(from_branch=br2, to_branch=br1)
 
73
    br1.working_tree().add_pending_merge(br2.revision_history()[5])
42
74
    commit(br1, "Commit nine", rev_id="a@u-0-5")
43
 
    br2.add_pending_merge(br1.revision_history()[4])
44
 
    commit(br2, "Commit ten", rev_id="b@u-0-6")
 
75
    # DO NOT FETCH HERE - we WANT a GHOST.
 
76
    #fetch(from_branch=br1, to_branch=br2)
 
77
    br2.working_tree().add_pending_merge(br1.revision_history()[4])
 
78
    commit(br2, "Commit ten - ghost merge", rev_id="b@u-0-6")
 
79
    
45
80
    return br1, br2
46
81
 
47
82
 
48
83
class TestIsAncestor(TestCaseInTempDir):
 
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']),
 
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             ('a@u-0-1', ['a@u-0-0', 'a@u-0-1']),
 
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             ('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',
 
92
                          'b@u-0-4']),
 
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',
 
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                          'a@u-0-3']),
 
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             ('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',
 
98
                          'b@u-0-5']),
 
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']),
 
105
             ]
 
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:
 
111
                    continue
 
112
                if rev_id in br2_only and not branch is br2:
 
113
                    continue
 
114
                mutter('ancestry of {%s}: %r',
 
115
                       rev_id, branch.get_ancestry(rev_id))
 
116
                self.assertEquals(sorted(branch.get_ancestry(rev_id)),
 
117
                                  [None] + sorted(anc))
 
118
    
 
119
    
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    def test_is_ancestor(self):
50
121
        """Test checking whether a revision is an ancestor of another revision"""
51
 
        from bzrlib.revision import is_ancestor, MultipleRevisionSources
52
 
        from bzrlib.errors import NoSuchRevision
53
 
        br1, br2 = make_branches()
 
122
        br1, br2 = make_branches(self)
54
123
        revisions = br1.revision_history()
55
124
        revisions_2 = br2.revision_history()
56
 
        sources = MultipleRevisionSources(br1, br2)
57
 
 
58
 
        assert is_ancestor(revisions[0], revisions[0], sources)
59
 
        assert is_ancestor(revisions[1], revisions[0], sources)
60
 
        assert not is_ancestor(revisions[0], revisions[1], sources)
61
 
        assert is_ancestor(revisions_2[3], revisions[0], sources)
62
 
        self.assertRaises(NoSuchRevision, is_ancestor, revisions_2[3],
63
 
                          revisions[0], br1)        
64
 
        assert is_ancestor(revisions[3], revisions_2[4], sources)
65
 
        assert is_ancestor(revisions[3], revisions_2[4], br1)
66
 
        assert is_ancestor(revisions[3], revisions_2[3], sources)
67
 
        assert not is_ancestor(revisions[3], revisions_2[3], br1)
 
125
        sources = br1
 
126
 
 
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))
 
138
 
68
139
 
69
140
class TestIntermediateRevisions(TestCaseInTempDir):
70
141
 
71
142
    def setUp(self):
72
143
        from bzrlib.commit import commit
73
144
        TestCaseInTempDir.setUp(self)
74
 
        self.br1, self.br2 = make_branches()
75
 
        commit(self.br2, "Commit eleven", rev_id="b@u-0-7")
76
 
        commit(self.br2, "Commit twelve", rev_id="b@u-0-8")
77
 
        commit(self.br2, "Commit thirtteen", rev_id="b@u-0-9")
78
 
        self.br1.add_pending_merge(self.br2.revision_history()[6])
79
 
        commit(self.br1, "Commit fourtten", rev_id="a@u-0-6")
80
 
        self.br2.add_pending_merge(self.br1.revision_history()[6])
81
 
        commit(self.br2, "Commit fifteen", rev_id="b@u-0-10")
 
145
        self.br1, self.br2 = make_branches(self)
 
146
 
 
147
        self.br2.working_tree().commit("Commit eleven", rev_id="b@u-0-7")
 
148
        self.br2.working_tree().commit("Commit twelve", rev_id="b@u-0-8")
 
149
        self.br2.working_tree().commit("Commit thirtteen", rev_id="b@u-0-9")
 
150
 
 
151
        fetch(from_branch=self.br2, to_branch=self.br1)
 
152
        self.br1.working_tree().add_pending_merge(self.br2.revision_history()[6])
 
153
        self.br1.working_tree().commit("Commit fourtten", rev_id="a@u-0-6")
 
154
 
 
155
        fetch(from_branch=self.br1, to_branch=self.br2)
 
156
        self.br2.working_tree().add_pending_merge(self.br1.revision_history()[6])
 
157
        self.br2.working_tree().commit("Commit fifteen", rev_id="b@u-0-10")
82
158
 
83
159
        from bzrlib.revision import MultipleRevisionSources
84
160
        self.sources = MultipleRevisionSources(self.br1, self.br2)
91
167
    def test_intervene(self):
92
168
        """Find intermediate revisions, without requiring history"""
93
169
        from bzrlib.errors import NotAncestor, NoSuchRevision
94
 
        assert len(self.intervene('a@u-0-0', 'a@u-0-0')) == 0
 
170
        self.assertEquals(len(self.intervene('a@u-0-0', 'a@u-0-0')), 0)
95
171
        self.assertEqual(self.intervene('a@u-0-0', 'a@u-0-1'), ['a@u-0-1'])
96
172
        self.assertEqual(self.intervene('a@u-0-0', 'a@u-0-2'), 
97
173
                         ['a@u-0-1', 'a@u-0-2'])
132
208
class TestCommonAncestor(TestCaseInTempDir):
133
209
    """Test checking whether a revision is an ancestor of another revision"""
134
210
 
 
211
    def test_old_common_ancestor(self):
 
212
        """Pick a resonable merge base using the old functionality"""
 
213
        from bzrlib.revision import old_common_ancestor as common_ancestor
 
214
        br1, br2 = make_branches(self)
 
215
        revisions = br1.revision_history()
 
216
        revisions_2 = br2.revision_history()
 
217
        sources = br1
 
218
 
 
219
        expected_ancestors_list = {revisions[3]:(0, 0), 
 
220
                                   revisions[2]:(1, 1),
 
221
                                   revisions_2[4]:(2, 1), 
 
222
                                   revisions[1]:(3, 2),
 
223
                                   revisions_2[3]:(4, 2),
 
224
                                   revisions[0]:(5, 3) }
 
225
        ancestors_list = find_present_ancestors(revisions[3], sources)
 
226
        self.assertEquals(len(expected_ancestors_list), len(ancestors_list))
 
227
        for key, value in expected_ancestors_list.iteritems():
 
228
            self.assertEqual(ancestors_list[key], value, 
 
229
                              "key %r, %r != %r" % (key, ancestors_list[key],
 
230
                                                    value))
 
231
 
 
232
        self.assertEqual(common_ancestor(revisions[0], revisions[0], sources),
 
233
                          revisions[0])
 
234
        self.assertEqual(common_ancestor(revisions[1], revisions[2], sources),
 
235
                          revisions[1])
 
236
        self.assertEqual(common_ancestor(revisions[1], revisions[1], sources),
 
237
                          revisions[1])
 
238
        self.assertEqual(common_ancestor(revisions[2], revisions_2[4], sources),
 
239
                          revisions[2])
 
240
        self.assertEqual(common_ancestor(revisions[3], revisions_2[4], sources),
 
241
                          revisions_2[4])
 
242
        self.assertEqual(common_ancestor(revisions[4], revisions_2[5], sources),
 
243
                          revisions_2[4])
 
244
        fetch(from_branch=br2, to_branch=br1)
 
245
        self.assertEqual(common_ancestor(revisions[5], revisions_2[6], sources),
 
246
                          revisions[4]) # revisions_2[5] is equally valid
 
247
        self.assertEqual(common_ancestor(revisions_2[6], revisions[5], sources),
 
248
                          revisions_2[5])
 
249
 
135
250
    def test_common_ancestor(self):
136
 
        from bzrlib.revision import find_present_ancestors, common_ancestor
137
 
        from bzrlib.revision import MultipleRevisionSources
138
 
        br1, br2 = make_branches()
 
251
        """Pick a reasonable merge base"""
 
252
        from bzrlib.revision import common_ancestor
 
253
        br1, br2 = make_branches(self)
139
254
        revisions = br1.revision_history()
140
255
        revisions_2 = br2.revision_history()
141
256
        sources = MultipleRevisionSources(br1, br2)
142
 
 
143
257
        expected_ancestors_list = {revisions[3]:(0, 0), 
144
258
                                   revisions[2]:(1, 1),
145
259
                                   revisions_2[4]:(2, 1), 
147
261
                                   revisions_2[3]:(4, 2),
148
262
                                   revisions[0]:(5, 3) }
149
263
        ancestors_list = find_present_ancestors(revisions[3], sources)
150
 
        assert len(expected_ancestors_list) == len(ancestors_list)
 
264
        self.assertEquals(len(expected_ancestors_list), len(ancestors_list))
151
265
        for key, value in expected_ancestors_list.iteritems():
152
266
            self.assertEqual(ancestors_list[key], value, 
153
267
                              "key %r, %r != %r" % (key, ancestors_list[key],
154
268
                                                    value))
155
 
 
156
269
        self.assertEqual(common_ancestor(revisions[0], revisions[0], sources),
157
270
                          revisions[0])
158
271
        self.assertEqual(common_ancestor(revisions[1], revisions[2], sources),
166
279
        self.assertEqual(common_ancestor(revisions[4], revisions_2[5], sources),
167
280
                          revisions_2[4])
168
281
        self.assertEqual(common_ancestor(revisions[5], revisions_2[6], sources),
169
 
                          revisions[4])
 
282
                          revisions[4]) # revisions_2[5] is equally valid
170
283
        self.assertEqual(common_ancestor(revisions_2[6], revisions[5], sources),
171
 
                          revisions_2[5])
 
284
                          revisions[4]) # revisions_2[5] is equally valid
 
285
 
 
286
    def test_combined(self):
 
287
        """combined_graph
 
288
        Ensure it's not order-sensitive
 
289
        """
 
290
        br1, br2 = make_branches(self)
 
291
        source = MultipleRevisionSources(br1, br2)
 
292
        combined_1 = combined_graph(br1.last_revision(), 
 
293
                                    br2.last_revision(), source)
 
294
        combined_2 = combined_graph(br2.last_revision(),
 
295
                                    br1.last_revision(), source)
 
296
        self.assertEquals(combined_1[1], combined_2[1])
 
297
        self.assertEquals(combined_1[2], combined_2[2])
 
298
        self.assertEquals(combined_1[3], combined_2[3])
 
299
        self.assertEquals(combined_1, combined_2)