19
19
"""Black-box tests for bzr.
21
21
These check that it behaves properly when it's invoked through the regular
22
command-line interface.
24
This always reinvokes bzr through a new Python interpreter, which is a
25
bit inefficient but arguably tests in a way more representative of how
26
it's normally invoked.
22
command-line interface. This doesn't actually run a new interpreter but
23
rather starts again from the run_bzr function.
29
# this code was previously in testbzr
31
from unittest import TestCase
32
from bzrlib.selftest import TestBase, InTempDir
36
class ExternalBase(InTempDir):
37
def runbzr(self, args, retcode=0):
40
from subprocess import call
41
except ImportError, e:
27
from cStringIO import StringIO
33
from bzrlib.branch import Branch
34
from bzrlib.clone import copy_branch
35
from bzrlib.errors import BzrCommandError
36
from bzrlib.osutils import has_symlinks
37
from bzrlib.selftest import TestCaseInTempDir, BzrTestBase
38
from bzrlib.selftest.HTTPTestUtil import TestCaseWithWebserver
41
class ExternalBase(TestCaseInTempDir):
43
def runbzr(self, args, retcode=0, backtick=False):
45
44
if isinstance(args, basestring):
46
45
args = args.split()
48
return self.runcmd(['python', self.BZRPATH,] + args,
53
class TestVersion(ExternalBase):
55
# output is intentionally passed through to stdout so that we
56
# can see the version being tested
57
self.runbzr(['version'])
61
class HelpCommands(ExternalBase):
48
return self.run_bzr_captured(args, retcode=retcode)[0]
50
return self.run_bzr_captured(args, retcode=retcode)
53
class TestCommands(ExternalBase):
55
def test_help_commands(self):
63
56
self.runbzr('--help')
64
57
self.runbzr('help')
65
58
self.runbzr('help commands')
66
59
self.runbzr('help help')
67
60
self.runbzr('commit -h')
70
class InitBranch(ExternalBase):
62
def test_init_branch(self):
73
63
self.runbzr(['init'])
77
class UserIdentity(ExternalBase):
65
def test_whoami(self):
79
66
# this should always identify something, if only "john@localhost"
80
67
self.runbzr("whoami")
81
68
self.runbzr("whoami --email")
82
self.assertEquals(self.backtick("bzr whoami --email").count('@'),
86
class InvalidCommands(ExternalBase):
70
self.assertEquals(self.runbzr("whoami --email",
71
backtick=True).count('@'), 1)
73
def test_whoami_branch(self):
74
"""branch specific user identity works."""
76
f = file('.bzr/email', 'wt')
77
f.write('Branch Identity <branch@identi.ty>')
79
bzr_email = os.environ.get('BZREMAIL')
80
if bzr_email is not None:
81
del os.environ['BZREMAIL']
82
whoami = self.runbzr("whoami",backtick=True)
83
whoami_email = self.runbzr("whoami --email",backtick=True)
84
self.assertTrue(whoami.startswith('Branch Identity <branch@identi.ty>'))
85
self.assertTrue(whoami_email.startswith('branch@identi.ty'))
86
# Verify that the environment variable overrides the value
88
os.environ['BZREMAIL'] = 'Different ID <other@environ.ment>'
89
whoami = self.runbzr("whoami",backtick=True)
90
whoami_email = self.runbzr("whoami --email",backtick=True)
91
self.assertTrue(whoami.startswith('Different ID <other@environ.ment>'))
92
self.assertTrue(whoami_email.startswith('other@environ.ment'))
93
if bzr_email is not None:
94
os.environ['BZREMAIL'] = bzr_email
96
def test_invalid_commands(self):
88
97
self.runbzr("pants", retcode=1)
89
98
self.runbzr("--pants off", retcode=1)
90
99
self.runbzr("diff --message foo", retcode=1)
94
class EmptyCommit(ExternalBase):
101
def test_empty_commit(self):
96
102
self.runbzr("init")
97
103
self.build_tree(['hello.txt'])
98
104
self.runbzr("commit -m empty", retcode=1)
99
105
self.runbzr("add hello.txt")
100
106
self.runbzr("commit -m added")
104
class IgnorePatterns(ExternalBase):
108
def test_empty_commit_message(self):
110
file('foo.c', 'wt').write('int main() {}')
111
self.runbzr(['add', 'foo.c'])
112
self.runbzr(["commit", "-m", ""] , retcode=1)
114
def test_ignore_patterns(self):
106
115
from bzrlib.branch import Branch
108
b = Branch('.', init=True)
117
b = Branch.initialize('.')
109
118
self.assertEquals(list(b.unknowns()), [])
111
120
file('foo.tmp', 'wt').write('tmp files are ignored')
112
121
self.assertEquals(list(b.unknowns()), [])
113
assert self.backtick('bzr unknowns') == ''
122
assert self.capture('unknowns') == ''
115
124
file('foo.c', 'wt').write('int main() {}')
116
125
self.assertEquals(list(b.unknowns()), ['foo.c'])
117
assert self.backtick('bzr unknowns') == 'foo.c\n'
126
assert self.capture('unknowns') == 'foo.c\n'
119
128
self.runbzr(['add', 'foo.c'])
120
assert self.backtick('bzr unknowns') == ''
129
assert self.capture('unknowns') == ''
122
131
# 'ignore' works when creating the .bzignore file
123
132
file('foo.blah', 'wt').write('blah')
124
133
self.assertEquals(list(b.unknowns()), ['foo.blah'])
125
134
self.runbzr('ignore *.blah')
126
135
self.assertEquals(list(b.unknowns()), [])
127
assert file('.bzrignore', 'rb').read() == '*.blah\n'
136
assert file('.bzrignore', 'rU').read() == '*.blah\n'
129
138
# 'ignore' works when then .bzrignore file already exists
130
139
file('garh', 'wt').write('garh')
131
140
self.assertEquals(list(b.unknowns()), ['garh'])
132
assert self.backtick('bzr unknowns') == 'garh\n'
141
assert self.capture('unknowns') == 'garh\n'
133
142
self.runbzr('ignore garh')
134
143
self.assertEquals(list(b.unknowns()), [])
135
assert file('.bzrignore', 'rb').read() == '*.blah\ngarh\n'
144
assert file('.bzrignore', 'rU').read() == '*.blah\ngarh\n'
146
def test_revert(self):
149
file('hello', 'wt').write('foo')
150
self.runbzr('add hello')
151
self.runbzr('commit -m setup hello')
153
file('goodbye', 'wt').write('baz')
154
self.runbzr('add goodbye')
155
self.runbzr('commit -m setup goodbye')
157
file('hello', 'wt').write('bar')
158
file('goodbye', 'wt').write('qux')
159
self.runbzr('revert hello')
160
self.check_file_contents('hello', 'foo')
161
self.check_file_contents('goodbye', 'qux')
162
self.runbzr('revert')
163
self.check_file_contents('goodbye', 'baz')
165
os.mkdir('revertdir')
166
self.runbzr('add revertdir')
167
self.runbzr('commit -m f')
168
os.rmdir('revertdir')
169
self.runbzr('revert')
171
os.symlink('/unlikely/to/exist', 'symlink')
172
self.runbzr('add symlink')
173
self.runbzr('commit -m f')
175
self.runbzr('revert')
177
file('hello', 'wt').write('xyz')
178
self.runbzr('commit -m xyz hello')
179
self.runbzr('revert -r 1 hello')
180
self.check_file_contents('hello', 'foo')
181
self.runbzr('revert hello')
182
self.check_file_contents('hello', 'xyz')
183
os.chdir('revertdir')
184
self.runbzr('revert')
188
def test_mv_modes(self):
189
"""Test two modes of operation for mv"""
190
from bzrlib.branch import Branch
191
b = Branch.initialize('.')
192
self.build_tree(['a', 'c', 'subdir/'])
193
self.run_bzr_captured(['add', self.test_dir])
194
self.run_bzr_captured(['mv', 'a', 'b'])
195
self.run_bzr_captured(['mv', 'b', 'subdir'])
196
self.run_bzr_captured(['mv', 'subdir/b', 'a'])
197
self.run_bzr_captured(['mv', 'a', 'c', 'subdir'])
198
self.run_bzr_captured(['mv', 'subdir/a', 'subdir/newa'])
200
def test_main_version(self):
201
"""Check output from version command and master option is reasonable"""
202
# output is intentionally passed through to stdout so that we
203
# can see the version being tested
204
output = self.runbzr('version', backtick=1)
205
self.log('bzr version output:')
207
self.assert_(output.startswith('bzr (bazaar-ng) '))
208
self.assertNotEqual(output.index('Canonical'), -1)
209
# make sure --version is consistent
210
tmp_output = self.runbzr('--version', backtick=1)
211
self.log('bzr --version output:')
213
self.assertEquals(output, tmp_output)
215
def example_branch(test):
217
file('hello', 'wt').write('foo')
218
test.runbzr('add hello')
219
test.runbzr('commit -m setup hello')
220
file('goodbye', 'wt').write('baz')
221
test.runbzr('add goodbye')
222
test.runbzr('commit -m setup goodbye')
224
def test_export(self):
227
self.example_branch()
228
self.runbzr('export ../latest')
229
self.assertEqual(file('../latest/goodbye', 'rt').read(), 'baz')
230
self.runbzr('export ../first -r 1')
231
assert not os.path.exists('../first/goodbye')
232
self.assertEqual(file('../first/hello', 'rt').read(), 'foo')
233
self.runbzr('export ../first.gz -r 1')
234
self.assertEqual(file('../first.gz/hello', 'rt').read(), 'foo')
235
self.runbzr('export ../first.bz2 -r 1')
236
self.assertEqual(file('../first.bz2/hello', 'rt').read(), 'foo')
237
self.runbzr('export ../first.tar -r 1')
238
assert os.path.isfile('../first.tar')
239
from tarfile import TarFile
240
tf = TarFile('../first.tar')
241
assert 'first/hello' in tf.getnames(), tf.getnames()
242
self.assertEqual(tf.extractfile('first/hello').read(), 'foo')
243
self.runbzr('export ../first.tar.gz -r 1')
244
assert os.path.isfile('../first.tar.gz')
245
self.runbzr('export ../first.tbz2 -r 1')
246
assert os.path.isfile('../first.tbz2')
247
self.runbzr('export ../first.tar.bz2 -r 1')
248
assert os.path.isfile('../first.tar.bz2')
249
self.runbzr('export ../first.tar.tbz2 -r 1')
250
assert os.path.isfile('../first.tar.tbz2')
251
from bz2 import BZ2File
252
tf = TarFile('../first.tar.tbz2',
253
fileobj=BZ2File('../first.tar.tbz2', 'r'))
254
assert 'first.tar/hello' in tf.getnames(), tf.getnames()
255
self.assertEqual(tf.extractfile('first.tar/hello').read(), 'foo')
256
self.runbzr('export ../first2.tar -r 1 --root pizza')
257
tf = TarFile('../first2.tar')
258
assert 'pizza/hello' in tf.getnames(), tf.getnames()
261
self.example_branch()
262
file('hello', 'wt').write('hello world!')
263
self.runbzr('commit -m fixing hello')
264
output = self.runbzr('diff -r 2..3', backtick=1)
265
self.assert_('\n+hello world!' in output)
266
output = self.runbzr('diff -r last:3..last:1', backtick=1)
267
self.assert_('\n+baz' in output)
269
def test_diff_branches(self):
270
self.build_tree(['branch1/', 'branch1/file', 'branch2/'])
271
branch = Branch.initialize('branch1')
273
branch.commit('add file')
274
copy_branch(branch, 'branch2')
275
print >> open('branch2/file', 'w'), 'new content'
276
branch2 = Branch.open('branch2')
277
branch2.commit('update file')
278
# should open branch1 and diff against branch2,
279
output = self.run_bzr_captured(['diff', '-r', 'branch:branch2', 'branch1'])
280
self.assertEquals(("=== modified file 'file'\n"
285
"+contents of branch1/file\n"
288
def test_branch(self):
289
"""Branch from one branch to another."""
292
self.example_branch()
294
self.runbzr('branch a b')
295
self.runbzr('branch a c -r 1')
297
self.runbzr('commit -m foo --unchanged')
299
# naughty - abstraction violations RBC 20050928
300
print "test_branch used to delete the stores, how is this meant to work ?"
301
#shutil.rmtree('a/.bzr/revision-store')
302
#shutil.rmtree('a/.bzr/inventory-store', ignore_errors=True)
303
#shutil.rmtree('a/.bzr/text-store', ignore_errors=True)
304
self.runbzr('branch a d --basis b')
306
def test_merge(self):
307
from bzrlib.branch import Branch
311
self.example_branch()
313
self.runbzr('branch a b')
315
file('goodbye', 'wt').write('quux')
316
self.runbzr(['commit', '-m', "more u's are always good"])
319
file('hello', 'wt').write('quuux')
320
# We can't merge when there are in-tree changes
321
self.runbzr('merge ../b', retcode=1)
322
self.runbzr(['commit', '-m', "Like an epidemic of u's"])
323
self.runbzr('merge ../b')
324
self.check_file_contents('goodbye', 'quux')
325
# Merging a branch pulls its revision into the tree
327
b = Branch.open('../b')
328
a.get_revision_xml(b.last_revision())
329
self.log('pending merges: %s', a.pending_merges())
330
# assert a.pending_merges() == [b.last_revision()], "Assertion %s %s" \
331
# % (a.pending_merges(), b.last_patch())
333
def test_merge_with_missing_file(self):
334
"""Merge handles missing file conflicts"""
338
print >> file('sub/a.txt', 'wb'), "hello"
339
print >> file('b.txt', 'wb'), "hello"
340
print >> file('sub/c.txt', 'wb'), "hello"
343
self.runbzr(('commit', '-m', 'added a'))
344
self.runbzr('branch . ../b')
345
print >> file('sub/a.txt', 'ab'), "there"
346
print >> file('b.txt', 'ab'), "there"
347
print >> file('sub/c.txt', 'ab'), "there"
348
self.runbzr(('commit', '-m', 'Added there'))
349
os.unlink('sub/a.txt')
350
os.unlink('sub/c.txt')
353
self.runbzr(('commit', '-m', 'Removed a.txt'))
355
print >> file('sub/a.txt', 'ab'), "something"
356
print >> file('b.txt', 'ab'), "something"
357
print >> file('sub/c.txt', 'ab'), "something"
358
self.runbzr(('commit', '-m', 'Modified a.txt'))
359
self.runbzr('merge ../a/')
360
assert os.path.exists('sub/a.txt.THIS')
361
assert os.path.exists('sub/a.txt.BASE')
363
self.runbzr('merge ../b/')
364
assert os.path.exists('sub/a.txt.OTHER')
365
assert os.path.exists('sub/a.txt.BASE')
368
"""Pull changes from one branch to another."""
372
self.example_branch()
373
self.runbzr('pull', retcode=1)
374
self.runbzr('missing', retcode=1)
375
self.runbzr('missing .')
376
self.runbzr('missing')
378
self.runbzr('pull /', retcode=1)
382
self.runbzr('branch a b')
386
self.runbzr('add subdir')
387
self.runbzr('commit -m blah --unchanged')
390
b = Branch.open('../b')
391
assert a.revision_history() == b.revision_history()[:-1]
392
self.runbzr('pull ../b')
393
assert a.revision_history() == b.revision_history()
394
self.runbzr('commit -m blah2 --unchanged')
396
self.runbzr('commit -m blah3 --unchanged')
397
self.runbzr('pull ../a', retcode=1)
398
print "DECIDE IF PULL CAN CONVERGE, blackbox.py"
401
self.runbzr('merge ../b')
402
self.runbzr('commit -m blah4 --unchanged')
403
os.chdir('../b/subdir')
404
self.runbzr('pull ../../a')
405
assert a.revision_history()[-1] == b.revision_history()[-1]
406
self.runbzr('commit -m blah5 --unchanged')
407
self.runbzr('commit -m blah6 --unchanged')
409
self.runbzr('pull ../a')
411
self.runbzr('commit -m blah7 --unchanged')
412
self.runbzr('merge ../b')
413
self.runbzr('commit -m blah8 --unchanged')
414
self.runbzr('pull ../b')
415
self.runbzr('pull ../b')
417
def test_locations(self):
418
"""Using and remembering different locations"""
422
self.runbzr('commit -m unchanged --unchanged')
423
self.runbzr('pull', retcode=1)
424
self.runbzr('merge', retcode=1)
425
self.runbzr('branch . ../b')
428
self.runbzr('branch . ../c')
429
self.runbzr('pull ../c')
432
self.runbzr('pull ../b')
434
self.runbzr('pull ../c')
435
self.runbzr('branch ../c ../d')
436
shutil.rmtree('../c')
441
self.runbzr('pull', retcode=1)
442
self.runbzr('pull ../a --remember')
445
def test_add_reports(self):
446
"""add command prints the names of added files."""
447
b = Branch.initialize('.')
448
self.build_tree(['top.txt', 'dir/', 'dir/sub.txt'])
449
out = self.run_bzr_captured(['add'], retcode = 0)[0]
450
# the ordering is not defined at the moment
451
results = sorted(out.rstrip('\n').split('\n'))
452
self.assertEquals(['added dir',
453
'added dir'+os.sep+'sub.txt',
457
def test_unknown_command(self):
458
"""Handling of unknown command."""
459
out, err = self.run_bzr_captured(['fluffy-badger'],
461
self.assertEquals(out, '')
462
err.index('unknown command')
464
def test_conflicts(self):
465
"""Handling of merge conflicts"""
468
file('hello', 'wb').write("hi world")
469
file('answer', 'wb').write("42")
472
self.runbzr('commit -m base')
473
self.runbzr('branch . ../other')
474
self.runbzr('branch . ../this')
476
file('hello', 'wb').write("Hello.")
477
file('answer', 'wb').write("Is anyone there?")
478
self.runbzr('commit -m other')
480
file('hello', 'wb').write("Hello, world")
481
self.runbzr('mv answer question')
482
file('question', 'wb').write("What do you get when you multiply six"
484
self.runbzr('commit -m this')
485
self.runbzr('merge ../other')
486
result = self.runbzr('conflicts', backtick=1)
487
self.assertEquals(result, "hello\nquestion\n")
488
result = self.runbzr('status', backtick=1)
489
assert "conflicts:\n hello\n question\n" in result, result
490
self.runbzr('resolve hello')
491
result = self.runbzr('conflicts', backtick=1)
492
self.assertEquals(result, "question\n")
493
self.runbzr('commit -m conflicts', retcode=1)
494
self.runbzr('resolve --all')
495
result = self.runbzr('conflicts', backtick=1)
496
self.runbzr('commit -m conflicts')
497
self.assertEquals(result, "")
499
def listdir_sorted(dir):
140
505
class OldTests(ExternalBase):
141
# old tests moved from ./testbzr
506
"""old tests moved from ./testbzr."""
143
509
from os import chdir, mkdir
144
510
from os.path import exists
147
512
runbzr = self.runbzr
148
backtick = self.backtick
513
capture = self.capture
149
514
progress = self.log
151
516
progress("basic branch creation")
318
assert os.path.exists('branch1')
319
assert not os.path.exists('branch2')
320
# Can't create a branch if it already exists
321
runbzr('branch branch1', retcode=1)
322
# Can't create a branch if its parent doesn't exist
323
runbzr('branch /unlikely/to/exist', retcode=1)
324
runbzr('branch branch1 branch2')
325
assert exists('branch2')
326
assert exists('branch2/sub1')
327
assert exists('branch2/sub1/hello.txt')
329
runbzr('branch --revision 0 branch1 branch3')
330
assert not exists('branch3/sub1/hello.txt')
331
runbzr('branch --revision 0..3 branch1 branch4', retcode=1)
335
runbzr('pull', retcode=1)
336
runbzr('pull ../branch2')
339
runbzr('commit --unchanged -m empty')
341
chdir('../../branch2')
343
runbzr('commit --unchanged -m empty')
345
runbzr('commit --unchanged -m empty')
346
runbzr('pull', retcode=1)
349
progress('status after remove')
350
mkdir('status-after-remove')
351
# see mail from William Dodé, 2005-05-25
352
# $ bzr init; touch a; bzr add a; bzr commit -m "add a"
353
# * looking for changes...
358
# bzr: local variable 'kind' referenced before assignment
359
# at /vrac/python/bazaar-ng/bzrlib/diff.py:286 in compare_trees()
360
# see ~/.bzr.log for debug information
361
chdir('status-after-remove')
363
file('a', 'w').write('foo')
365
runbzr(['commit', '-m', 'add a'])
373
progress("recursive and non-recursive add")
378
fp = os.path.join('foo', 'test.txt')
382
runbzr('add --no-recurse foo')
383
runbzr('file-id foo')
384
runbzr('file-id ' + fp, 1) # not versioned yet
385
runbzr('commit -m add-dir-only')
387
self.runbzr('file-id ' + fp, 1) # still not versioned
389
self.runbzr('add foo')
390
self.runbzr('file-id ' + fp)
391
self.runbzr('commit -m add-sub-file')
397
class RevertCommand(ExternalBase):
401
file('hello', 'wt').write('foo')
402
self.runbzr('add hello')
403
self.runbzr('commit -m setup hello')
405
file('hello', 'wt').write('bar')
406
self.runbzr('revert hello')
407
self.check_file_contents('hello', 'foo')
680
os.symlink("NOWHERE1", "link1")
682
assert self.capture('unknowns') == ''
683
runbzr(['commit', '-m', '1: added symlink link1'])
687
assert self.capture('unknowns') == ''
688
os.symlink("NOWHERE2", "d1/link2")
689
assert self.capture('unknowns') == 'd1/link2\n'
690
# is d1/link2 found when adding d1
692
assert self.capture('unknowns') == ''
693
os.symlink("NOWHERE3", "d1/link3")
694
assert self.capture('unknowns') == 'd1/link3\n'
695
runbzr(['commit', '-m', '2: added dir, symlink'])
697
runbzr('rename d1 d2')
698
runbzr('move d2/link2 .')
699
runbzr('move link1 d2')
700
assert os.readlink("./link2") == "NOWHERE2"
701
assert os.readlink("d2/link1") == "NOWHERE1"
702
runbzr('add d2/link3')
704
runbzr(['commit', '-m', '3: rename of dir, move symlinks, add link3'])
707
os.symlink("TARGET 2", "link2")
708
os.unlink("d2/link1")
709
os.symlink("TARGET 1", "d2/link1")
711
assert self.capture("relpath d2/link1") == "d2/link1\n"
712
runbzr(['commit', '-m', '4: retarget of two links'])
714
runbzr('remove d2/link1')
715
assert self.capture('unknowns') == 'd2/link1\n'
716
runbzr(['commit', '-m', '5: remove d2/link1'])
717
# try with the rm alias
718
runbzr('add d2/link1')
719
runbzr(['commit', '-m', '6: add d2/link1'])
720
runbzr('rm d2/link1')
721
assert self.capture('unknowns') == 'd2/link1\n'
722
runbzr(['commit', '-m', '7: remove d2/link1'])
726
runbzr('rename d2/link3 d1/link3new')
727
assert self.capture('unknowns') == 'd2/link1\n'
728
runbzr(['commit', '-m', '8: remove d2/link1, move/rename link3'])
732
runbzr(['export', '-r', '1', 'exp1.tmp'])
734
assert listdir_sorted(".") == [ "link1" ]
735
assert os.readlink("link1") == "NOWHERE1"
738
runbzr(['export', '-r', '2', 'exp2.tmp'])
740
assert listdir_sorted(".") == [ "d1", "link1" ]
743
runbzr(['export', '-r', '3', 'exp3.tmp'])
745
assert listdir_sorted(".") == [ "d2", "link2" ]
746
assert listdir_sorted("d2") == [ "link1", "link3" ]
747
assert os.readlink("d2/link1") == "NOWHERE1"
748
assert os.readlink("link2") == "NOWHERE2"
751
runbzr(['export', '-r', '4', 'exp4.tmp'])
753
assert listdir_sorted(".") == [ "d2", "link2" ]
754
assert os.readlink("d2/link1") == "TARGET 1"
755
assert os.readlink("link2") == "TARGET 2"
756
assert listdir_sorted("d2") == [ "link1", "link3" ]
759
runbzr(['export', '-r', '5', 'exp5.tmp'])
761
assert listdir_sorted(".") == [ "d2", "link2" ]
762
assert os.path.islink("link2")
763
assert listdir_sorted("d2")== [ "link3" ]
766
runbzr(['export', '-r', '8', 'exp6.tmp'])
768
self.assertEqual(listdir_sorted("."), [ "d1", "d2", "link2"])
769
assert listdir_sorted("d1") == [ "link3new" ]
770
assert listdir_sorted("d2") == []
771
assert os.readlink("d1/link3new") == "NOWHERE3"
774
progress("skipping symlink tests")
777
class HttpTests(TestCaseWithWebserver):
778
"""Test bzr ui commands against remote branches."""
780
def test_branch(self):
782
branch = Branch.initialize('from')
783
branch.commit('empty commit for nonsense', allow_pointless=True)
784
url = self.get_remote_url('from')
785
self.run_bzr('branch', url, 'to')
786
branch = Branch.open('to')
787
self.assertEqual(1, len(branch.revision_history()))