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Viewing changes to bzrlib/tests/test_ui.py

  • Committer: Martin Pool
  • Date: 2010-09-15 10:40:51 UTC
  • mfrom: (5425 +trunk)
  • mto: This revision was merged to the branch mainline in revision 5426.
  • Revision ID: mbp@sourcefrog.net-20100915104051-pkjmuc2bc27buysp
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1
# Copyright (C) 2005-2010 Canonical Ltd
 
2
#
 
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.
 
7
#
 
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.
 
12
#
 
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
16
 
 
17
"""Tests for the bzrlib ui
 
18
"""
 
19
 
 
20
import os
 
21
import time
 
22
 
 
23
from StringIO import StringIO
 
24
 
 
25
from testtools.matchers import *
 
26
 
 
27
from bzrlib import (
 
28
    config,
 
29
    errors,
 
30
    remote,
 
31
    repository,
 
32
    tests,
 
33
    ui as _mod_ui,
 
34
    )
 
35
from bzrlib.symbol_versioning import (
 
36
    deprecated_in,
 
37
    )
 
38
from bzrlib.tests import (
 
39
    fixtures,
 
40
    test_progress,
 
41
    )
 
42
from bzrlib.ui import text as _mod_ui_text
 
43
from bzrlib.tests.testui import (
 
44
    ProgressRecordingUIFactory,
 
45
    )
 
46
 
 
47
 
 
48
class TestUIConfiguration(tests.TestCaseWithTransport):
 
49
 
 
50
    def test_output_encoding_configuration(self):
 
51
        enc = fixtures.generate_unicode_encodings().next()
 
52
        config.GlobalConfig().set_user_option('output_encoding',
 
53
            enc)
 
54
        ui = tests.TestUIFactory(stdin=None,
 
55
            stdout=tests.StringIOWrapper(),
 
56
            stderr=tests.StringIOWrapper())
 
57
        output = ui.make_output_stream()
 
58
        self.assertEquals(output.encoding, enc)
 
59
 
 
60
 
 
61
class TestTextUIFactory(tests.TestCase):
 
62
 
 
63
    def make_test_ui_factory(self, stdin_contents):
 
64
        ui = tests.TestUIFactory(stdin=stdin_contents,
 
65
                                 stdout=tests.StringIOWrapper(),
 
66
                                 stderr=tests.StringIOWrapper())
 
67
        return ui
 
68
 
 
69
    def test_text_factory_confirm(self):
 
70
        # turns into reading a regular boolean
 
71
        ui = self.make_test_ui_factory('n\n')
 
72
        self.assertEquals(ui.confirm_action('Should %(thing)s pass?',
 
73
            'bzrlib.tests.test_ui.confirmation',
 
74
            {'thing': 'this'},),
 
75
            False)
 
76
 
 
77
    def test_text_factory_ascii_password(self):
 
78
        ui = self.make_test_ui_factory('secret\n')
 
79
        pb = ui.nested_progress_bar()
 
80
        try:
 
81
            self.assertEqual('secret',
 
82
                             self.apply_redirected(ui.stdin, ui.stdout,
 
83
                                                   ui.stderr,
 
84
                                                   ui.get_password))
 
85
            # ': ' is appended to prompt
 
86
            self.assertEqual(': ', ui.stderr.getvalue())
 
87
            self.assertEqual('', ui.stdout.readline())
 
88
            # stdin should be empty
 
89
            self.assertEqual('', ui.stdin.readline())
 
90
        finally:
 
91
            pb.finished()
 
92
 
 
93
    def test_text_factory_utf8_password(self):
 
94
        """Test an utf8 password.
 
95
 
 
96
        We can't predict what encoding users will have for stdin, so we force
 
97
        it to utf8 to test that we transport the password correctly.
 
98
        """
 
99
        ui = self.make_test_ui_factory(u'baz\u1234'.encode('utf8'))
 
100
        ui.stderr.encoding = ui.stdout.encoding = ui.stdin.encoding = 'utf8'
 
101
        pb = ui.nested_progress_bar()
 
102
        try:
 
103
            password = self.apply_redirected(ui.stdin, ui.stdout, ui.stderr,
 
104
                                             ui.get_password,
 
105
                                             u'Hello \u1234 %(user)s',
 
106
                                             user=u'some\u1234')
 
107
            # We use StringIO objects, we need to decode them
 
108
            self.assertEqual(u'baz\u1234', password.decode('utf8'))
 
109
            self.assertEqual(u'Hello \u1234 some\u1234: ',
 
110
                             ui.stderr.getvalue().decode('utf8'))
 
111
            # stdin and stdout should be empty
 
112
            self.assertEqual('', ui.stdin.readline())
 
113
            self.assertEqual('', ui.stdout.readline())
 
114
        finally:
 
115
            pb.finished()
 
116
 
 
117
    def test_text_ui_get_boolean(self):
 
118
        stdin = tests.StringIOWrapper("y\n" # True
 
119
                                      "n\n" # False
 
120
                                      "yes with garbage\nY\n" # True
 
121
                                      "not an answer\nno\n" # False
 
122
                                      "I'm sure!\nyes\n" # True
 
123
                                      "NO\n" # False
 
124
                                      "foo\n")
 
125
        stdout = tests.StringIOWrapper()
 
126
        stderr = tests.StringIOWrapper()
 
127
        factory = _mod_ui_text.TextUIFactory(stdin, stdout, stderr)
 
128
        self.assertEqual(True, factory.get_boolean(""))
 
129
        self.assertEqual(False, factory.get_boolean(""))
 
130
        self.assertEqual(True, factory.get_boolean(""))
 
131
        self.assertEqual(False, factory.get_boolean(""))
 
132
        self.assertEqual(True, factory.get_boolean(""))
 
133
        self.assertEqual(False, factory.get_boolean(""))
 
134
        self.assertEqual("foo\n", factory.stdin.read())
 
135
        # stdin should be empty
 
136
        self.assertEqual('', factory.stdin.readline())
 
137
 
 
138
    def test_text_ui_get_integer(self):
 
139
        stdin = tests.StringIOWrapper(
 
140
            "1\n"
 
141
            "  -2  \n"
 
142
            "hmmm\nwhat else ?\nCome on\nok 42\n4.24\n42\n")
 
143
        stdout = tests.StringIOWrapper()
 
144
        stderr = tests.StringIOWrapper()
 
145
        factory = _mod_ui_text.TextUIFactory(stdin, stdout, stderr)
 
146
        self.assertEqual(1, factory.get_integer(""))
 
147
        self.assertEqual(-2, factory.get_integer(""))
 
148
        self.assertEqual(42, factory.get_integer(""))
 
149
 
 
150
    def test_text_factory_prompt(self):
 
151
        # see <https://launchpad.net/bugs/365891>
 
152
        StringIO = tests.StringIOWrapper
 
153
        factory = _mod_ui_text.TextUIFactory(StringIO(), StringIO(), StringIO())
 
154
        factory.prompt('foo %2e')
 
155
        self.assertEqual('', factory.stdout.getvalue())
 
156
        self.assertEqual('foo %2e', factory.stderr.getvalue())
 
157
 
 
158
    def test_text_factory_prompts_and_clears(self):
 
159
        # a get_boolean call should clear the pb before prompting
 
160
        out = test_progress._TTYStringIO()
 
161
        os.environ['TERM'] = 'xterm'
 
162
        factory = _mod_ui_text.TextUIFactory(
 
163
            stdin=tests.StringIOWrapper("yada\ny\n"),
 
164
            stdout=out, stderr=out)
 
165
        factory._avail_width = lambda: 79
 
166
        pb = factory.nested_progress_bar()
 
167
        pb.show_bar = False
 
168
        pb.show_spinner = False
 
169
        pb.show_count = False
 
170
        pb.update("foo", 0, 1)
 
171
        self.assertEqual(True,
 
172
                         self.apply_redirected(None, factory.stdout,
 
173
                                               factory.stdout,
 
174
                                               factory.get_boolean,
 
175
                                               "what do you want"))
 
176
        output = out.getvalue()
 
177
        self.assertContainsRe(output,
 
178
            "| foo *\r\r  *\r*")
 
179
        self.assertContainsRe(output,
 
180
            r"what do you want\? \[y/n\]: what do you want\? \[y/n\]: ")
 
181
        # stdin should have been totally consumed
 
182
        self.assertEqual('', factory.stdin.readline())
 
183
 
 
184
    def test_text_tick_after_update(self):
 
185
        ui_factory = _mod_ui_text.TextUIFactory(stdout=tests.StringIOWrapper(),
 
186
                                                stderr=tests.StringIOWrapper())
 
187
        pb = ui_factory.nested_progress_bar()
 
188
        try:
 
189
            pb.update('task', 0, 3)
 
190
            # Reset the clock, so that it actually tries to repaint itself
 
191
            ui_factory._progress_view._last_repaint = time.time() - 1.0
 
192
            pb.tick()
 
193
        finally:
 
194
            pb.finished()
 
195
 
 
196
    def test_text_ui_getusername(self):
 
197
        factory = _mod_ui_text.TextUIFactory(None, None, None)
 
198
        factory.stdin = tests.StringIOWrapper("someuser\n\n")
 
199
        factory.stdout = tests.StringIOWrapper()
 
200
        factory.stderr = tests.StringIOWrapper()
 
201
        factory.stdout.encoding = "utf8"
 
202
        # there is no output from the base factory
 
203
        self.assertEqual("someuser",
 
204
                         factory.get_username('Hello %(host)s', host='some'))
 
205
        self.assertEquals("Hello some: ", factory.stderr.getvalue())
 
206
        self.assertEquals('', factory.stdout.getvalue())
 
207
        self.assertEqual("", factory.get_username("Gebruiker"))
 
208
        # stdin should be empty
 
209
        self.assertEqual('', factory.stdin.readline())
 
210
 
 
211
    def test_text_ui_getusername_utf8(self):
 
212
        ui = tests.TestUIFactory(stdin=u'someuser\u1234'.encode('utf8'),
 
213
                                 stdout=tests.StringIOWrapper(),
 
214
                                 stderr=tests.StringIOWrapper())
 
215
        ui.stderr.encoding = ui.stdout.encoding = ui.stdin.encoding = "utf8"
 
216
        pb = ui.nested_progress_bar()
 
217
        try:
 
218
            # there is no output from the base factory
 
219
            username = self.apply_redirected(ui.stdin, ui.stdout, ui.stderr,
 
220
                ui.get_username, u'Hello\u1234 %(host)s', host=u'some\u1234')
 
221
            self.assertEquals(u"someuser\u1234", username.decode('utf8'))
 
222
            self.assertEquals(u"Hello\u1234 some\u1234: ",
 
223
                              ui.stderr.getvalue().decode("utf8"))
 
224
            self.assertEquals('', ui.stdout.getvalue())
 
225
        finally:
 
226
            pb.finished()
 
227
 
 
228
    def test_quietness(self):
 
229
        os.environ['BZR_PROGRESS_BAR'] = 'text'
 
230
        ui_factory = _mod_ui_text.TextUIFactory(None,
 
231
            test_progress._TTYStringIO(),
 
232
            test_progress._TTYStringIO())
 
233
        self.assertIsInstance(ui_factory._progress_view,
 
234
            _mod_ui_text.TextProgressView)
 
235
        ui_factory.be_quiet(True)
 
236
        self.assertIsInstance(ui_factory._progress_view,
 
237
            _mod_ui_text.NullProgressView)
 
238
 
 
239
    def test_text_ui_show_user_warning(self):
 
240
        from bzrlib.repofmt.groupcompress_repo import RepositoryFormat2a
 
241
        from bzrlib.repofmt.pack_repo import RepositoryFormatKnitPack5
 
242
        err = StringIO()
 
243
        out = StringIO()
 
244
        ui = tests.TextUIFactory(stdin=None, stdout=out, stderr=err)
 
245
        remote_fmt = remote.RemoteRepositoryFormat()
 
246
        remote_fmt._network_name = RepositoryFormatKnitPack5().network_name()
 
247
        ui.show_user_warning('cross_format_fetch', from_format=RepositoryFormat2a(),
 
248
            to_format=remote_fmt)
 
249
        self.assertEquals('', out.getvalue())
 
250
        self.assertEquals("Doing on-the-fly conversion from RepositoryFormat2a() to "
 
251
            "RemoteRepositoryFormat(_network_name='Bazaar RepositoryFormatKnitPack5 "
 
252
            "(bzr 1.6)\\n').\nThis may take some time. Upgrade the repositories to "
 
253
            "the same format for better performance.\n",
 
254
            err.getvalue())
 
255
        # and now with it suppressed please
 
256
        err = StringIO()
 
257
        out = StringIO()
 
258
        ui = tests.TextUIFactory(stdin=None, stdout=out, stderr=err)
 
259
        ui.suppressed_warnings.add('cross_format_fetch')
 
260
        ui.show_user_warning('cross_format_fetch', from_format=RepositoryFormat2a(),
 
261
            to_format=remote_fmt)
 
262
        self.assertEquals('', out.getvalue())
 
263
        self.assertEquals('', err.getvalue())
 
264
 
 
265
 
 
266
class TestTextUIOutputStream(tests.TestCase):
 
267
    """Tests for output stream that synchronizes with progress bar."""
 
268
 
 
269
    def test_output_clears_terminal(self):
 
270
        stdout = tests.StringIOWrapper()
 
271
        stderr = tests.StringIOWrapper()
 
272
        clear_calls = []
 
273
 
 
274
        uif =  _mod_ui_text.TextUIFactory(None, stdout, stderr)
 
275
        uif.clear_term = lambda: clear_calls.append('clear')
 
276
 
 
277
        stream = _mod_ui_text.TextUIOutputStream(uif, uif.stdout)
 
278
        stream.write("Hello world!\n")
 
279
        stream.write("there's more...\n")
 
280
        stream.writelines(["1\n", "2\n", "3\n"])
 
281
 
 
282
        self.assertEqual(stdout.getvalue(),
 
283
            "Hello world!\n"
 
284
            "there's more...\n"
 
285
            "1\n2\n3\n")
 
286
        self.assertEqual(['clear', 'clear', 'clear'],
 
287
            clear_calls)
 
288
 
 
289
        stream.flush()
 
290
 
 
291
 
 
292
class UITests(tests.TestCase):
 
293
 
 
294
    def test_progress_construction(self):
 
295
        """TextUIFactory constructs the right progress view.
 
296
        """
 
297
        TTYStringIO = test_progress._TTYStringIO
 
298
        FileStringIO = tests.StringIOWrapper
 
299
        for (file_class, term, pb, expected_pb_class) in (
 
300
            # on an xterm, either use them or not as the user requests,
 
301
            # otherwise default on
 
302
            (TTYStringIO, 'xterm', 'none', _mod_ui_text.NullProgressView),
 
303
            (TTYStringIO, 'xterm', 'text', _mod_ui_text.TextProgressView),
 
304
            (TTYStringIO, 'xterm', None, _mod_ui_text.TextProgressView),
 
305
            # on a dumb terminal, again if there's explicit configuration do
 
306
            # it, otherwise default off
 
307
            (TTYStringIO, 'dumb', 'none', _mod_ui_text.NullProgressView),
 
308
            (TTYStringIO, 'dumb', 'text', _mod_ui_text.TextProgressView),
 
309
            (TTYStringIO, 'dumb', None, _mod_ui_text.NullProgressView),
 
310
            # on a non-tty terminal, it's null regardless of $TERM
 
311
            (FileStringIO, 'xterm', None, _mod_ui_text.NullProgressView),
 
312
            (FileStringIO, 'dumb', None, _mod_ui_text.NullProgressView),
 
313
            # however, it can still be forced on
 
314
            (FileStringIO, 'dumb', 'text', _mod_ui_text.TextProgressView),
 
315
            ):
 
316
            os.environ['TERM'] = term
 
317
            if pb is None:
 
318
                if 'BZR_PROGRESS_BAR' in os.environ:
 
319
                    del os.environ['BZR_PROGRESS_BAR']
 
320
            else:
 
321
                os.environ['BZR_PROGRESS_BAR'] = pb
 
322
            stdin = file_class('')
 
323
            stderr = file_class()
 
324
            stdout = file_class()
 
325
            uif = _mod_ui.make_ui_for_terminal(stdin, stdout, stderr)
 
326
            self.assertIsInstance(uif, _mod_ui_text.TextUIFactory,
 
327
                "TERM=%s BZR_PROGRESS_BAR=%s uif=%r" % (term, pb, uif,))
 
328
            self.assertIsInstance(uif.make_progress_view(),
 
329
                expected_pb_class,
 
330
                "TERM=%s BZR_PROGRESS_BAR=%s uif=%r" % (term, pb, uif,))
 
331
 
 
332
    def test_text_ui_non_terminal(self):
 
333
        """Even on non-ttys, make_ui_for_terminal gives a text ui."""
 
334
        stdin = test_progress._NonTTYStringIO('')
 
335
        stderr = test_progress._NonTTYStringIO()
 
336
        stdout = test_progress._NonTTYStringIO()
 
337
        for term_type in ['dumb', None, 'xterm']:
 
338
            if term_type is None:
 
339
                del os.environ['TERM']
 
340
            else:
 
341
                os.environ['TERM'] = term_type
 
342
            uif = _mod_ui.make_ui_for_terminal(stdin, stdout, stderr)
 
343
            self.assertIsInstance(uif, _mod_ui_text.TextUIFactory,
 
344
                'TERM=%r' % (term_type,))
 
345
 
 
346
 
 
347
class SilentUITests(tests.TestCase):
 
348
 
 
349
    def test_silent_factory_get_password(self):
 
350
        # A silent factory that can't do user interaction can't get a
 
351
        # password.  Possibly it should raise a more specific error but it
 
352
        # can't succeed.
 
353
        ui = _mod_ui.SilentUIFactory()
 
354
        stdout = tests.StringIOWrapper()
 
355
        self.assertRaises(
 
356
            NotImplementedError,
 
357
            self.apply_redirected,
 
358
            None, stdout, stdout, ui.get_password)
 
359
        # and it didn't write anything out either
 
360
        self.assertEqual('', stdout.getvalue())
 
361
 
 
362
    def test_silent_ui_getbool(self):
 
363
        factory = _mod_ui.SilentUIFactory()
 
364
        stdout = tests.StringIOWrapper()
 
365
        self.assertRaises(
 
366
            NotImplementedError,
 
367
            self.apply_redirected,
 
368
            None, stdout, stdout, factory.get_boolean, "foo")
 
369
 
 
370
 
 
371
class TestUIFactoryTests(tests.TestCase):
 
372
 
 
373
    def test_test_ui_factory_progress(self):
 
374
        # there's no output; we just want to make sure this doesn't crash -
 
375
        # see https://bugs.launchpad.net/bzr/+bug/408201
 
376
        ui = tests.TestUIFactory()
 
377
        pb = ui.nested_progress_bar()
 
378
        pb.update('hello')
 
379
        pb.tick()
 
380
        pb.finished()
 
381
 
 
382
 
 
383
class CannedInputUIFactoryTests(tests.TestCase):
 
384
 
 
385
    def test_canned_input_get_input(self):
 
386
        uif = _mod_ui.CannedInputUIFactory([True, 'mbp', 'password', 42])
 
387
        self.assertEqual(True, uif.get_boolean('Extra cheese?'))
 
388
        self.assertEqual('mbp', uif.get_username('Enter your user name'))
 
389
        self.assertEqual('password',
 
390
                         uif.get_password('Password for %(host)s',
 
391
                                          host='example.com'))
 
392
        self.assertEqual(42, uif.get_integer('And all that jazz ?'))
 
393
 
 
394
 
 
395
class TestBoolFromString(tests.TestCase):
 
396
 
 
397
    def assertIsTrue(self, s, accepted_values=None):
 
398
        res = _mod_ui.bool_from_string(s, accepted_values=accepted_values)
 
399
        self.assertEquals(True, res)
 
400
 
 
401
    def assertIsFalse(self, s, accepted_values=None):
 
402
        res = _mod_ui.bool_from_string(s, accepted_values=accepted_values)
 
403
        self.assertEquals(False, res)
 
404
 
 
405
    def assertIsNone(self, s, accepted_values=None):
 
406
        res = _mod_ui.bool_from_string(s, accepted_values=accepted_values)
 
407
        self.assertIs(None, res)
 
408
 
 
409
    def test_know_valid_values(self):
 
410
        self.assertIsTrue('true')
 
411
        self.assertIsFalse('false')
 
412
        self.assertIsTrue('1')
 
413
        self.assertIsFalse('0')
 
414
        self.assertIsTrue('on')
 
415
        self.assertIsFalse('off')
 
416
        self.assertIsTrue('yes')
 
417
        self.assertIsFalse('no')
 
418
        self.assertIsTrue('y')
 
419
        self.assertIsFalse('n')
 
420
        # Also try some case variations
 
421
        self.assertIsTrue('True')
 
422
        self.assertIsFalse('False')
 
423
        self.assertIsTrue('On')
 
424
        self.assertIsFalse('Off')
 
425
        self.assertIsTrue('ON')
 
426
        self.assertIsFalse('OFF')
 
427
        self.assertIsTrue('oN')
 
428
        self.assertIsFalse('oFf')
 
429
 
 
430
    def test_invalid_values(self):
 
431
        self.assertIsNone(None)
 
432
        self.assertIsNone('doubt')
 
433
        self.assertIsNone('frue')
 
434
        self.assertIsNone('talse')
 
435
        self.assertIsNone('42')
 
436
 
 
437
    def test_provided_values(self):
 
438
        av = dict(y=True, n=False, yes=True, no=False)
 
439
        self.assertIsTrue('y', av)
 
440
        self.assertIsTrue('Y', av)
 
441
        self.assertIsTrue('Yes', av)
 
442
        self.assertIsFalse('n', av)
 
443
        self.assertIsFalse('N', av)
 
444
        self.assertIsFalse('No', av)
 
445
        self.assertIsNone('1', av)
 
446
        self.assertIsNone('0', av)
 
447
        self.assertIsNone('on', av)
 
448
        self.assertIsNone('off', av)
 
449
 
 
450
 
 
451
class TestConfirmationUserInterfacePolicy(tests.TestCase):
 
452
 
 
453
    def test_confirm_action_default(self):
 
454
        base_ui = _mod_ui.NoninteractiveUIFactory()
 
455
        for answer in [True, False]:
 
456
            self.assertEquals(
 
457
                _mod_ui.ConfirmationUserInterfacePolicy(base_ui, answer, {})
 
458
                .confirm_action("Do something?",
 
459
                    "bzrlib.tests.do_something", {}),
 
460
                answer)
 
461
 
 
462
    def test_confirm_action_specific(self):
 
463
        base_ui = _mod_ui.NoninteractiveUIFactory()
 
464
        for default_answer in [True, False]:
 
465
            for specific_answer in [True, False]:
 
466
                for conf_id in ['given_id', 'other_id']:
 
467
                    wrapper = _mod_ui.ConfirmationUserInterfacePolicy(
 
468
                        base_ui, default_answer, dict(given_id=specific_answer))
 
469
                    result = wrapper.confirm_action("Do something?", conf_id, {})
 
470
                    if conf_id == 'given_id':
 
471
                        self.assertEquals(result, specific_answer)
 
472
                    else:
 
473
                        self.assertEquals(result, default_answer)
 
474
 
 
475
    def test_repr(self):
 
476
        base_ui = _mod_ui.NoninteractiveUIFactory()
 
477
        wrapper = _mod_ui.ConfirmationUserInterfacePolicy(
 
478
            base_ui, True, dict(a=2))
 
479
        self.assertThat(repr(wrapper),
 
480
            Equals("ConfirmationUserInterfacePolicy("
 
481
                "NoninteractiveUIFactory(), True, {'a': 2})"))
 
482
 
 
483
 
 
484
class TestProgressRecordingUI(tests.TestCase):
 
485
    """Test test-oriented UIFactory that records progress updates"""
 
486
 
 
487
    def test_nested_ignore_depth_beyond_one(self):
 
488
        # we only want to capture the first level out progress, not
 
489
        # want sub-components might do. So we have nested bars ignored.
 
490
        factory = ProgressRecordingUIFactory()
 
491
        pb1 = factory.nested_progress_bar()
 
492
        pb1.update('foo', 0, 1)
 
493
        pb2 = factory.nested_progress_bar()
 
494
        pb2.update('foo', 0, 1)
 
495
        pb2.finished()
 
496
        pb1.finished()
 
497
        self.assertEqual([("update", 0, 1, 'foo')], factory._calls)