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Viewing changes to bzrlib/tests/test_commit.py

  • Committer: Robert Collins
  • Date: 2006-07-20 13:00:31 UTC
  • mto: (1852.9.1 Tree.compare().)
  • mto: This revision was merged to the branch mainline in revision 1890.
  • Revision ID: robertc@robertcollins.net-20060720130031-d26103a427ea10f3
Start tree implementation tests.

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bzrlib/tests/test_commit.py
1
 
# Copyright (C) 2005, 2006, 2008 Canonical Ltd
2
 
#
 
1
# Copyright (C) 2005, 2006 by Canonical Ltd
 
2
 
3
3
# This program is free software; you can redistribute it and/or modify
4
4
# it under the terms of the GNU General Public License as published by
5
5
# the Free Software Foundation; either version 2 of the License, or
6
6
# (at your option) any later version.
7
 
#
 
7
 
8
8
# This program is distributed in the hope that it will be useful,
9
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11
11
# GNU General Public License for more details.
12
 
#
 
12
 
13
13
# You should have received a copy of the GNU General Public License
14
14
# along with this program; if not, write to the Free Software
15
 
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
16
16
 
17
17
 
18
18
import os
19
19
 
20
20
import bzrlib
21
 
from bzrlib import (
22
 
    bzrdir,
23
 
    errors,
24
 
    lockdir,
25
 
    osutils,
26
 
    tests,
27
 
    )
 
21
from bzrlib.tests import TestCaseWithTransport
28
22
from bzrlib.branch import Branch
29
23
from bzrlib.bzrdir import BzrDir, BzrDirMetaFormat1
 
24
from bzrlib.workingtree import WorkingTree
30
25
from bzrlib.commit import Commit, NullCommitReporter
31
26
from bzrlib.config import BranchConfig
32
 
from bzrlib.errors import (PointlessCommit, BzrError, SigningFailed,
 
27
from bzrlib.errors import (PointlessCommit, BzrError, SigningFailed, 
33
28
                           LockContention)
34
 
from bzrlib.tests import SymlinkFeature, TestCaseWithTransport
35
 
from bzrlib.workingtree import WorkingTree
36
29
 
37
30
 
38
31
# TODO: Test commit with some added, and added-but-missing files
71
64
    def renamed(self, change, old_path, new_path):
72
65
        self.calls.append(('renamed', change, old_path, new_path))
73
66
 
74
 
    def is_verbose(self):
75
 
        return True
76
 
 
77
67
 
78
68
class TestCommit(TestCaseWithTransport):
79
69
 
96
86
        eq(rev.message, 'add hello')
97
87
 
98
88
        tree1 = b.repository.revision_tree(rh[0])
99
 
        tree1.lock_read()
100
89
        text = tree1.get_file_text(file_id)
101
 
        tree1.unlock()
102
 
        self.assertEqual('hello world', text)
 
90
        eq(text, 'hello world')
103
91
 
104
92
        tree2 = b.repository.revision_tree(rh[1])
105
 
        tree2.lock_read()
106
 
        text = tree2.get_file_text(file_id)
107
 
        tree2.unlock()
108
 
        self.assertEqual('version 2', text)
 
93
        eq(tree2.get_file_text(file_id), 'version 2')
109
94
 
110
 
    def test_missing_commit(self):
111
 
        """Test a commit with a missing file"""
 
95
    def test_delete_commit(self):
 
96
        """Test a commit with a deleted file"""
112
97
        wt = self.make_branch_and_tree('.')
113
98
        b = wt.branch
114
99
        file('hello', 'w').write('hello world')
121
106
        tree = b.repository.revision_tree('rev2')
122
107
        self.assertFalse(tree.has_id('hello-id'))
123
108
 
124
 
    def test_partial_commit_move(self):
125
 
        """Test a partial commit where a file was renamed but not committed.
126
 
 
127
 
        https://bugs.launchpad.net/bzr/+bug/83039
128
 
 
129
 
        If not handled properly, commit will try to snapshot
130
 
        dialog.py with olive/ as a parent, while
131
 
        olive/ has not been snapshotted yet.
132
 
        """
133
 
        wt = self.make_branch_and_tree('.')
134
 
        b = wt.branch
135
 
        self.build_tree(['annotate/', 'annotate/foo.py',
136
 
                         'olive/', 'olive/dialog.py'
137
 
                        ])
138
 
        wt.add(['annotate', 'olive', 'annotate/foo.py', 'olive/dialog.py'])
139
 
        wt.commit(message='add files')
140
 
        wt.rename_one("olive/dialog.py", "aaa")
141
 
        self.build_tree_contents([('annotate/foo.py', 'modified\n')])
142
 
        wt.commit('renamed hello', specific_files=["annotate"])
143
 
 
144
109
    def test_pointless_commit(self):
145
110
        """Commit refuses unless there are changes or it's forced."""
146
111
        wt = self.make_branch_and_tree('.')
154
119
                          message='fails',
155
120
                          allow_pointless=False)
156
121
        self.assertEquals(b.revno(), 1)
157
 
 
 
122
        
158
123
    def test_commit_empty(self):
159
124
        """Commiting an empty tree works."""
160
125
        wt = self.make_branch_and_tree('.')
177
142
              ['hello-id', 'buongia-id'])
178
143
        wt.commit(message='add files',
179
144
                 rev_id='test@rev-1')
180
 
 
 
145
        
181
146
        os.remove('hello')
182
147
        file('buongia', 'w').write('new text')
183
148
        wt.commit(message='update text',
194
159
        eq(b.revno(), 3)
195
160
 
196
161
        tree2 = b.repository.revision_tree('test@rev-2')
197
 
        tree2.lock_read()
198
 
        self.addCleanup(tree2.unlock)
199
162
        self.assertTrue(tree2.has_filename('hello'))
200
163
        self.assertEquals(tree2.get_file_text('hello-id'), 'hello')
201
164
        self.assertEquals(tree2.get_file_text('buongia-id'), 'new text')
202
 
 
 
165
        
203
166
        tree3 = b.repository.revision_tree('test@rev-3')
204
 
        tree3.lock_read()
205
 
        self.addCleanup(tree3.unlock)
206
167
        self.assertFalse(tree3.has_filename('hello'))
207
168
        self.assertEquals(tree3.get_file_text('buongia-id'), 'new text')
208
169
 
219
180
 
220
181
        eq = self.assertEquals
221
182
        tree1 = b.repository.revision_tree('test@rev-1')
222
 
        tree1.lock_read()
223
 
        self.addCleanup(tree1.unlock)
224
183
        eq(tree1.id2path('hello-id'), 'hello')
225
184
        eq(tree1.get_file_text('hello-id'), 'contents of hello\n')
226
185
        self.assertFalse(tree1.has_filename('fruity'))
229
188
        eq(ie.revision, 'test@rev-1')
230
189
 
231
190
        tree2 = b.repository.revision_tree('test@rev-2')
232
 
        tree2.lock_read()
233
 
        self.addCleanup(tree2.unlock)
234
191
        eq(tree2.id2path('hello-id'), 'fruity')
235
192
        eq(tree2.get_file_text('hello-id'), 'contents of hello\n')
236
193
        self.check_inventory_shape(tree2.inventory, ['fruity'])
260
217
        wt.move(['hello'], 'a')
261
218
        r2 = 'test@rev-2'
262
219
        wt.commit('two', rev_id=r2, allow_pointless=False)
263
 
        wt.lock_read()
264
 
        try:
265
 
            self.check_inventory_shape(wt.read_working_inventory(),
266
 
                                       ['a/', 'a/hello', 'b/'])
267
 
        finally:
268
 
            wt.unlock()
 
220
        self.check_inventory_shape(wt.read_working_inventory(),
 
221
                                   ['a', 'a/hello', 'b'])
269
222
 
270
223
        wt.move(['b'], 'a')
271
224
        r3 = 'test@rev-3'
272
225
        wt.commit('three', rev_id=r3, allow_pointless=False)
273
 
        wt.lock_read()
274
 
        try:
275
 
            self.check_inventory_shape(wt.read_working_inventory(),
276
 
                                       ['a/', 'a/hello', 'a/b/'])
277
 
            self.check_inventory_shape(b.repository.get_revision_inventory(r3),
278
 
                                       ['a/', 'a/hello', 'a/b/'])
279
 
        finally:
280
 
            wt.unlock()
 
226
        self.check_inventory_shape(wt.read_working_inventory(),
 
227
                                   ['a', 'a/hello', 'a/b'])
 
228
        self.check_inventory_shape(b.repository.get_revision_inventory(r3),
 
229
                                   ['a', 'a/hello', 'a/b'])
281
230
 
282
231
        wt.move(['a/hello'], 'a/b')
283
232
        r4 = 'test@rev-4'
284
233
        wt.commit('four', rev_id=r4, allow_pointless=False)
285
 
        wt.lock_read()
286
 
        try:
287
 
            self.check_inventory_shape(wt.read_working_inventory(),
288
 
                                       ['a/', 'a/b/hello', 'a/b/'])
289
 
        finally:
290
 
            wt.unlock()
 
234
        self.check_inventory_shape(wt.read_working_inventory(),
 
235
                                   ['a', 'a/b/hello', 'a/b'])
291
236
 
292
237
        inv = b.repository.get_revision_inventory(r4)
293
238
        eq(inv['hello-id'].revision, r4)
294
239
        eq(inv['a-id'].revision, r1)
295
240
        eq(inv['b-id'].revision, r3)
296
 
 
 
241
        
297
242
    def test_removed_commit(self):
298
243
        """Commit with a removed file"""
299
244
        wt = self.make_branch_and_tree('.')
394
339
                                                      allow_pointless=True,
395
340
                                                      rev_id='B',
396
341
                                                      working_tree=wt)
397
 
            def sign(text):
398
 
                return bzrlib.gpg.LoopbackGPGStrategy(None).sign(text)
399
 
            self.assertEqual(sign(Testament.from_revision(branch.repository,
400
 
                             'B').as_short_text()),
 
342
            self.assertEqual(Testament.from_revision(branch.repository,
 
343
                             'B').as_short_text(),
401
344
                             branch.repository.get_signature_text('B'))
402
345
        finally:
403
346
            bzrlib.gpg.GPGStrategy = oldstrategy
484
427
        other_bzrdir = master_branch.bzrdir.sprout('other')
485
428
        other_tree = other_bzrdir.open_workingtree()
486
429
 
487
 
        # do a commit to the other branch changing the content file so
 
430
        # do a commit to the the other branch changing the content file so
488
431
        # that our commit after merging will have a merged revision in the
489
432
        # content file history.
490
433
        self.build_tree_contents([('other/content_file', 'change in other\n')])
493
436
        # do a merge into the bound branch from other, and then change the
494
437
        # content file locally to force a new revision (rather than using the
495
438
        # revision from other). This forces extra processing in commit.
496
 
        bound_tree.merge_from_branch(other_tree.branch)
 
439
        self.merge(other_tree.branch, bound_tree)
497
440
        self.build_tree_contents([('bound/content_file', 'change in bound\n')])
498
441
 
499
442
        # before #34959 was fixed, this failed with 'revision not present in
501
444
        bound_tree.commit(message='commit of merge in bound tree')
502
445
 
503
446
    def test_commit_reporting_after_merge(self):
504
 
        # when doing a commit of a merge, the reporter needs to still
 
447
        # when doing a commit of a merge, the reporter needs to still 
505
448
        # be called for each item that is added/removed/deleted.
506
449
        this_tree = self.make_branch_and_tree('this')
507
450
        # we need a bunch of files and dirs, to perform one action on each.
547
490
            other_tree.commit('modify all sample files and dirs.')
548
491
        finally:
549
492
            other_tree.unlock()
550
 
        this_tree.merge_from_branch(other_tree.branch)
 
493
        self.merge(other_tree.branch, this_tree)
551
494
        reporter = CapturingReporter()
552
495
        this_tree.commit('do the commit', reporter=reporter)
553
 
        expected = set([
 
496
        self.assertEqual([
 
497
            ('change', 'unchanged', 'dirtoleave'),
 
498
            ('change', 'unchanged', 'filetoleave'),
554
499
            ('change', 'modified', 'filetomodify'),
555
500
            ('change', 'added', 'newdir'),
556
501
            ('change', 'added', 'newfile'),
557
502
            ('renamed', 'renamed', 'dirtorename', 'renameddir'),
558
 
            ('renamed', 'renamed', 'filetorename', 'renamedfile'),
559
503
            ('renamed', 'renamed', 'dirtoreparent', 'renameddir/reparenteddir'),
560
504
            ('renamed', 'renamed', 'filetoreparent', 'renameddir/reparentedfile'),
 
505
            ('renamed', 'renamed', 'filetorename', 'renamedfile'),
561
506
            ('deleted', 'dirtoremove'),
562
507
            ('deleted', 'filetoremove'),
563
 
            ])
564
 
        result = set(reporter.calls)
565
 
        missing = expected - result
566
 
        new = result - expected
567
 
        self.assertEqual((set(), set()), (missing, new))
 
508
            ],
 
509
            reporter.calls)
568
510
 
569
511
    def test_commit_removals_respects_filespec(self):
570
512
        """Commit respects the specified_files for removals."""
573
515
        tree.add(['a', 'b'])
574
516
        tree.commit('added a, b')
575
517
        tree.remove(['a', 'b'])
576
 
        tree.commit('removed a', specific_files='a')
577
 
        basis = tree.basis_tree()
578
 
        tree.lock_read()
579
 
        try:
580
 
            self.assertIs(None, basis.path2id('a'))
581
 
            self.assertFalse(basis.path2id('b') is None)
582
 
        finally:
583
 
            tree.unlock()
584
 
 
585
 
    def test_commit_saves_1ms_timestamp(self):
586
 
        """Passing in a timestamp is saved with 1ms resolution"""
587
 
        tree = self.make_branch_and_tree('.')
588
 
        self.build_tree(['a'])
589
 
        tree.add('a')
590
 
        tree.commit('added a', timestamp=1153248633.4186721, timezone=0,
591
 
                    rev_id='a1')
592
 
 
593
 
        rev = tree.branch.repository.get_revision('a1')
594
 
        self.assertEqual(1153248633.419, rev.timestamp)
595
 
 
596
 
    def test_commit_has_1ms_resolution(self):
597
 
        """Allowing commit to generate the timestamp also has 1ms resolution"""
598
 
        tree = self.make_branch_and_tree('.')
599
 
        self.build_tree(['a'])
600
 
        tree.add('a')
601
 
        tree.commit('added a', rev_id='a1')
602
 
 
603
 
        rev = tree.branch.repository.get_revision('a1')
604
 
        timestamp = rev.timestamp
605
 
        timestamp_1ms = round(timestamp, 3)
606
 
        self.assertEqual(timestamp_1ms, timestamp)
607
 
 
608
 
    def assertBasisTreeKind(self, kind, tree, file_id):
609
 
        basis = tree.basis_tree()
610
 
        basis.lock_read()
611
 
        try:
612
 
            self.assertEqual(kind, basis.kind(file_id))
613
 
        finally:
614
 
            basis.unlock()
615
 
 
616
 
    def test_commit_kind_changes(self):
617
 
        self.requireFeature(SymlinkFeature)
618
 
        tree = self.make_branch_and_tree('.')
619
 
        os.symlink('target', 'name')
620
 
        tree.add('name', 'a-file-id')
621
 
        tree.commit('Added a symlink')
622
 
        self.assertBasisTreeKind('symlink', tree, 'a-file-id')
623
 
 
624
 
        os.unlink('name')
625
 
        self.build_tree(['name'])
626
 
        tree.commit('Changed symlink to file')
627
 
        self.assertBasisTreeKind('file', tree, 'a-file-id')
628
 
 
629
 
        os.unlink('name')
630
 
        os.symlink('target', 'name')
631
 
        tree.commit('file to symlink')
632
 
        self.assertBasisTreeKind('symlink', tree, 'a-file-id')
633
 
 
634
 
        os.unlink('name')
635
 
        os.mkdir('name')
636
 
        tree.commit('symlink to directory')
637
 
        self.assertBasisTreeKind('directory', tree, 'a-file-id')
638
 
 
639
 
        os.rmdir('name')
640
 
        os.symlink('target', 'name')
641
 
        tree.commit('directory to symlink')
642
 
        self.assertBasisTreeKind('symlink', tree, 'a-file-id')
643
 
 
644
 
        # prepare for directory <-> file tests
645
 
        os.unlink('name')
646
 
        os.mkdir('name')
647
 
        tree.commit('symlink to directory')
648
 
        self.assertBasisTreeKind('directory', tree, 'a-file-id')
649
 
 
650
 
        os.rmdir('name')
651
 
        self.build_tree(['name'])
652
 
        tree.commit('Changed directory to file')
653
 
        self.assertBasisTreeKind('file', tree, 'a-file-id')
654
 
 
655
 
        os.unlink('name')
656
 
        os.mkdir('name')
657
 
        tree.commit('file to directory')
658
 
        self.assertBasisTreeKind('directory', tree, 'a-file-id')
659
 
 
660
 
    def test_commit_unversioned_specified(self):
661
 
        """Commit should raise if specified files isn't in basis or worktree"""
662
 
        tree = self.make_branch_and_tree('.')
663
 
        self.assertRaises(errors.PathsNotVersionedError, tree.commit,
664
 
                          'message', specific_files=['bogus'])
665
 
 
666
 
    class Callback(object):
667
 
 
668
 
        def __init__(self, message, testcase):
669
 
            self.called = False
670
 
            self.message = message
671
 
            self.testcase = testcase
672
 
 
673
 
        def __call__(self, commit_obj):
674
 
            self.called = True
675
 
            self.testcase.assertTrue(isinstance(commit_obj, Commit))
676
 
            return self.message
677
 
 
678
 
    def test_commit_callback(self):
679
 
        """Commit should invoke a callback to get the message"""
680
 
 
681
 
        tree = self.make_branch_and_tree('.')
682
 
        try:
683
 
            tree.commit()
684
 
        except Exception, e:
685
 
            self.assertTrue(isinstance(e, BzrError))
686
 
            self.assertEqual('The message or message_callback keyword'
687
 
                             ' parameter is required for commit().', str(e))
688
 
        else:
689
 
            self.fail('exception not raised')
690
 
        cb = self.Callback(u'commit 1', self)
691
 
        tree.commit(message_callback=cb)
692
 
        self.assertTrue(cb.called)
693
 
        repository = tree.branch.repository
694
 
        message = repository.get_revision(tree.last_revision()).message
695
 
        self.assertEqual('commit 1', message)
696
 
 
697
 
    def test_no_callback_pointless(self):
698
 
        """Callback should not be invoked for pointless commit"""
699
 
        tree = self.make_branch_and_tree('.')
700
 
        cb = self.Callback(u'commit 2', self)
701
 
        self.assertRaises(PointlessCommit, tree.commit, message_callback=cb,
702
 
                          allow_pointless=False)
703
 
        self.assertFalse(cb.called)
704
 
 
705
 
    def test_no_callback_netfailure(self):
706
 
        """Callback should not be invoked if connectivity fails"""
707
 
        tree = self.make_branch_and_tree('.')
708
 
        cb = self.Callback(u'commit 2', self)
709
 
        repository = tree.branch.repository
710
 
        # simulate network failure
711
 
        def raise_(self, arg, arg2, arg3=None, arg4=None):
712
 
            raise errors.NoSuchFile('foo')
713
 
        repository.add_inventory = raise_
714
 
        repository.add_inventory_by_delta = raise_
715
 
        self.assertRaises(errors.NoSuchFile, tree.commit, message_callback=cb)
716
 
        self.assertFalse(cb.called)
717
 
 
718
 
    def test_selected_file_merge_commit(self):
719
 
        """Ensure the correct error is raised"""
720
 
        tree = self.make_branch_and_tree('foo')
721
 
        # pending merge would turn into a left parent
722
 
        tree.commit('commit 1')
723
 
        tree.add_parent_tree_id('example')
724
 
        self.build_tree(['foo/bar', 'foo/baz'])
725
 
        tree.add(['bar', 'baz'])
726
 
        err = self.assertRaises(errors.CannotCommitSelectedFileMerge,
727
 
            tree.commit, 'commit 2', specific_files=['bar', 'baz'])
728
 
        self.assertEqual(['bar', 'baz'], err.files)
729
 
        self.assertEqual('Selected-file commit of merges is not supported'
730
 
                         ' yet: files bar, baz', str(err))
731
 
 
732
 
    def test_commit_ordering(self):
733
 
        """Test of corner-case commit ordering error"""
734
 
        tree = self.make_branch_and_tree('.')
735
 
        self.build_tree(['a/', 'a/z/', 'a/c/', 'a/z/x', 'a/z/y'])
736
 
        tree.add(['a/', 'a/z/', 'a/c/', 'a/z/x', 'a/z/y'])
737
 
        tree.commit('setup')
738
 
        self.build_tree(['a/c/d/'])
739
 
        tree.add('a/c/d')
740
 
        tree.rename_one('a/z/x', 'a/c/d/x')
741
 
        tree.commit('test', specific_files=['a/z/y'])
742
 
 
743
 
    def test_commit_no_author(self):
744
 
        """The default kwarg author in MutableTree.commit should not add
745
 
        the 'author' revision property.
746
 
        """
747
 
        tree = self.make_branch_and_tree('foo')
748
 
        rev_id = tree.commit('commit 1')
749
 
        rev = tree.branch.repository.get_revision(rev_id)
750
 
        self.assertFalse('author' in rev.properties)
751
 
        self.assertFalse('authors' in rev.properties)
752
 
 
753
 
    def test_commit_author(self):
754
 
        """Passing a non-empty author kwarg to MutableTree.commit should add
755
 
        the 'author' revision property.
756
 
        """
757
 
        tree = self.make_branch_and_tree('foo')
758
 
        rev_id = self.callDeprecated(['The parameter author was '
759
 
                'deprecated in version 1.13. Use authors instead'],
760
 
                tree.commit, 'commit 1', author='John Doe <jdoe@example.com>')
761
 
        rev = tree.branch.repository.get_revision(rev_id)
762
 
        self.assertEqual('John Doe <jdoe@example.com>',
763
 
                         rev.properties['authors'])
764
 
        self.assertFalse('author' in rev.properties)
765
 
 
766
 
    def test_commit_empty_authors_list(self):
767
 
        """Passing an empty list to authors shouldn't add the property."""
768
 
        tree = self.make_branch_and_tree('foo')
769
 
        rev_id = tree.commit('commit 1', authors=[])
770
 
        rev = tree.branch.repository.get_revision(rev_id)
771
 
        self.assertFalse('author' in rev.properties)
772
 
        self.assertFalse('authors' in rev.properties)
773
 
 
774
 
    def test_multiple_authors(self):
775
 
        tree = self.make_branch_and_tree('foo')
776
 
        rev_id = tree.commit('commit 1',
777
 
                authors=['John Doe <jdoe@example.com>',
778
 
                         'Jane Rey <jrey@example.com>'])
779
 
        rev = tree.branch.repository.get_revision(rev_id)
780
 
        self.assertEqual('John Doe <jdoe@example.com>\n'
781
 
                'Jane Rey <jrey@example.com>', rev.properties['authors'])
782
 
        self.assertFalse('author' in rev.properties)
783
 
 
784
 
    def test_author_and_authors_incompatible(self):
785
 
        tree = self.make_branch_and_tree('foo')
786
 
        self.assertRaises(AssertionError, tree.commit, 'commit 1',
787
 
                authors=['John Doe <jdoe@example.com>',
788
 
                         'Jane Rey <jrey@example.com>'],
789
 
                author="Jack Me <jme@example.com>")
790
 
 
791
 
    def test_author_with_newline_rejected(self):
792
 
        tree = self.make_branch_and_tree('foo')
793
 
        self.assertRaises(AssertionError, tree.commit, 'commit 1',
794
 
                authors=['John\nDoe <jdoe@example.com>'])
795
 
 
796
 
    def test_commit_with_checkout_and_branch_sharing_repo(self):
797
 
        repo = self.make_repository('repo', shared=True)
798
 
        # make_branch_and_tree ignores shared repos
799
 
        branch = bzrdir.BzrDir.create_branch_convenience('repo/branch')
800
 
        tree2 = branch.create_checkout('repo/tree2')
801
 
        tree2.commit('message', rev_id='rev1')
802
 
        self.assertTrue(tree2.branch.repository.has_revision('rev1'))
 
518
        Commit().commit(message='removed a', working_tree=tree, 
 
519
                        specific_files='a')
 
520
        basis = tree.basis_tree().inventory
 
521
        self.assertIs(None, basis.path2id('a'))
 
522
        self.assertFalse(basis.path2id('b') is None)