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Viewing changes to bzrlib/tests/test_ui.py

  • Committer: Ian Clatworthy
  • Date: 2009-09-09 11:43:10 UTC
  • mto: (4634.37.2 prepare-2.0)
  • mto: This revision was merged to the branch mainline in revision 4689.
  • Revision ID: ian.clatworthy@canonical.com-20090909114310-glw7tv76i5gnx9pt
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bzrlib/tests/test_ui.py
1
 
# Copyright (C) 2005 Canonical Ltd
 
1
# Copyright (C) 2005, 2008, 2009 Canonical Ltd
2
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
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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16
16
 
17
17
"""Tests for the bzrlib ui
18
18
"""
21
21
from StringIO import StringIO
22
22
import re
23
23
import sys
 
24
import time
24
25
 
25
 
import bzrlib
26
 
import bzrlib.errors as errors
27
 
from bzrlib.progress import (
28
 
    DotsProgressBar,
29
 
    ProgressBarStack,
30
 
    TTYProgressBar,
 
26
from bzrlib import (
 
27
    errors,
 
28
    tests,
 
29
    ui as _mod_ui,
 
30
    )
 
31
from bzrlib.symbol_versioning import (
 
32
    deprecated_in,
31
33
    )
32
34
from bzrlib.tests import (
33
35
    TestCase,
34
36
    TestUIFactory,
35
37
    StringIOWrapper,
36
38
    )
37
 
from bzrlib.tests.test_progress import _TTYStringIO
 
39
from bzrlib.tests.test_progress import (
 
40
    _NonTTYStringIO,
 
41
    _TTYStringIO,
 
42
    )
38
43
from bzrlib.ui import (
 
44
    CannedInputUIFactory,
39
45
    CLIUIFactory,
40
46
    SilentUIFactory,
41
 
    )
42
 
from bzrlib.ui.text import TextUIFactory
43
 
 
44
 
 
45
 
class UITests(TestCase):
46
 
 
47
 
    def test_silent_factory(self):
48
 
        ui = SilentUIFactory()
49
 
        stdout = StringIO()
50
 
        self.assertEqual(None,
51
 
                         self.apply_redirected(None, stdout, stdout,
52
 
                                               ui.get_password))
53
 
        self.assertEqual('', stdout.getvalue())
54
 
        self.assertEqual(None,
55
 
                         self.apply_redirected(None, stdout, stdout,
56
 
                                               ui.get_password,
57
 
                                               u'Hello\u1234 %(user)s',
58
 
                                               user=u'some\u1234'))
59
 
        self.assertEqual('', stdout.getvalue())
 
47
    UIFactory,
 
48
    make_ui_for_terminal,
 
49
    )
 
50
from bzrlib.ui.text import (
 
51
    NullProgressView,
 
52
    TextProgressView,
 
53
    TextUIFactory,
 
54
    )
 
55
 
 
56
 
 
57
class UITests(tests.TestCase):
60
58
 
61
59
    def test_text_factory_ascii_password(self):
62
 
        ui = TestUIFactory(stdin='secret\n', stdout=StringIOWrapper())
 
60
        ui = tests.TestUIFactory(stdin='secret\n',
 
61
                                 stdout=tests.StringIOWrapper(),
 
62
                                 stderr=tests.StringIOWrapper())
63
63
        pb = ui.nested_progress_bar()
64
64
        try:
65
65
            self.assertEqual('secret',
66
66
                             self.apply_redirected(ui.stdin, ui.stdout,
67
 
                                                   ui.stdout,
 
67
                                                   ui.stderr,
68
68
                                                   ui.get_password))
69
69
            # ': ' is appended to prompt
70
 
            self.assertEqual(': ', ui.stdout.getvalue())
 
70
            self.assertEqual(': ', ui.stderr.getvalue())
 
71
            self.assertEqual('', ui.stdout.readline())
71
72
            # stdin should be empty
72
73
            self.assertEqual('', ui.stdin.readline())
73
74
        finally:
79
80
        We can't predict what encoding users will have for stdin, so we force
80
81
        it to utf8 to test that we transport the password correctly.
81
82
        """
82
 
        ui = TestUIFactory(stdin=u'baz\u1234'.encode('utf8'),
83
 
                           stdout=StringIOWrapper())
84
 
        ui.stdin.encoding = 'utf8'
85
 
        ui.stdout.encoding = ui.stdin.encoding
 
83
        ui = tests.TestUIFactory(stdin=u'baz\u1234'.encode('utf8'),
 
84
                                 stdout=tests.StringIOWrapper(),
 
85
                                 stderr=tests.StringIOWrapper())
 
86
        ui.stderr.encoding = ui.stdout.encoding = ui.stdin.encoding = 'utf8'
86
87
        pb = ui.nested_progress_bar()
87
88
        try:
88
 
            password = self.apply_redirected(ui.stdin, ui.stdout, ui.stdout,
 
89
            password = self.apply_redirected(ui.stdin, ui.stdout, ui.stderr,
89
90
                                             ui.get_password,
90
91
                                             u'Hello \u1234 %(user)s',
91
92
                                             user=u'some\u1234')
92
93
            # We use StringIO objects, we need to decode them
93
94
            self.assertEqual(u'baz\u1234', password.decode('utf8'))
94
95
            self.assertEqual(u'Hello \u1234 some\u1234: ',
95
 
                             ui.stdout.getvalue().decode('utf8'))
96
 
            # stdin should be empty
 
96
                             ui.stderr.getvalue().decode('utf8'))
 
97
            # stdin and stdout should be empty
97
98
            self.assertEqual('', ui.stdin.readline())
 
99
            self.assertEqual('', ui.stdout.readline())
98
100
        finally:
99
101
            pb.finished()
100
102
 
 
103
    def test_progress_construction(self):
 
104
        """TextUIFactory constructs the right progress view.
 
105
        """
 
106
        for (file_class, term, pb, expected_pb_class) in (
 
107
            # on an xterm, either use them or not as the user requests,
 
108
            # otherwise default on
 
109
            (_TTYStringIO, 'xterm', 'none', NullProgressView),
 
110
            (_TTYStringIO, 'xterm', 'text', TextProgressView),
 
111
            (_TTYStringIO, 'xterm', None, TextProgressView),
 
112
            # on a dumb terminal, again if there's explicit configuration do
 
113
            # it, otherwise default off
 
114
            (_TTYStringIO, 'dumb', 'none', NullProgressView),
 
115
            (_TTYStringIO, 'dumb', 'text', TextProgressView),
 
116
            (_TTYStringIO, 'dumb', None, NullProgressView),
 
117
            # on a non-tty terminal, it's null regardless of $TERM
 
118
            (StringIO, 'xterm', None, NullProgressView),
 
119
            (StringIO, 'dumb', None, NullProgressView),
 
120
            # however, it can still be forced on
 
121
            (StringIO, 'dumb', 'text', TextProgressView),
 
122
            ):
 
123
            os.environ['TERM'] = term
 
124
            if pb is None:
 
125
                if 'BZR_PROGRESS_BAR' in os.environ:
 
126
                    del os.environ['BZR_PROGRESS_BAR']
 
127
            else:
 
128
                os.environ['BZR_PROGRESS_BAR'] = pb
 
129
            stdin = file_class('')
 
130
            stderr = file_class()
 
131
            stdout = file_class()
 
132
            uif = make_ui_for_terminal(stdin, stdout, stderr)
 
133
            self.assertIsInstance(uif, TextUIFactory,
 
134
                "TERM=%s BZR_PROGRESS_BAR=%s uif=%r" % (term, pb, uif,))
 
135
            self.assertIsInstance(uif.make_progress_view(),
 
136
                expected_pb_class,
 
137
                "TERM=%s BZR_PROGRESS_BAR=%s uif=%r" % (term, pb, uif,))
 
138
 
 
139
    def test_text_ui_non_terminal(self):
 
140
        """Even on non-ttys, make_ui_for_terminal gives a text ui."""
 
141
        stdin = _NonTTYStringIO('')
 
142
        stderr = _NonTTYStringIO()
 
143
        stdout = _NonTTYStringIO()
 
144
        for term_type in ['dumb', None, 'xterm']:
 
145
            if term_type is None:
 
146
                del os.environ['TERM']
 
147
            else:
 
148
                os.environ['TERM'] = term_type
 
149
            uif = make_ui_for_terminal(stdin, stdout, stderr)
 
150
            self.assertIsInstance(uif, TextUIFactory,
 
151
                'TERM=%r' % (term_type,))
 
152
 
101
153
    def test_progress_note(self):
102
154
        stderr = StringIO()
103
155
        stdout = StringIO()
104
 
        ui_factory = TextUIFactory(bar_type=TTYProgressBar)
 
156
        ui_factory = TextUIFactory(stdin=StringIO(''),
 
157
            stderr=stderr,
 
158
            stdout=stdout)
105
159
        pb = ui_factory.nested_progress_bar()
106
160
        try:
107
 
            pb.to_messages_file = stdout
108
 
            ui_factory._progress_bar_stack.bottom().to_file = stderr
109
161
            result = pb.note('t')
110
162
            self.assertEqual(None, result)
111
163
            self.assertEqual("t\n", stdout.getvalue())
117
169
            pb.finished()
118
170
 
119
171
    def test_progress_note_clears(self):
120
 
        stderr = StringIO()
121
 
        stdout = StringIO()
122
 
        # The PQM redirects the output to a file, so it
123
 
        # defaults to creating a Dots progress bar. we
124
 
        # need to force it to believe we are a TTY
125
 
        ui_factory = TextUIFactory(bar_type=TTYProgressBar)
 
172
        stderr = _TTYStringIO()
 
173
        stdout = _TTYStringIO()
 
174
        # so that we get a TextProgressBar
 
175
        os.environ['TERM'] = 'xterm'
 
176
        ui_factory = TextUIFactory(
 
177
            stdin=StringIO(''),
 
178
            stdout=stdout, stderr=stderr)
 
179
        self.assertIsInstance(ui_factory._progress_view,
 
180
            TextProgressView)
126
181
        pb = ui_factory.nested_progress_bar()
127
182
        try:
128
 
            pb.to_messages_file = stdout
129
 
            ui_factory._progress_bar_stack.bottom().to_file = stderr
130
183
            # Create a progress update that isn't throttled
131
 
            pb.start_time -= 10
132
184
            pb.update('x', 1, 1)
133
185
            result = pb.note('t')
134
186
            self.assertEqual(None, result)
142
194
 
143
195
    def test_progress_nested(self):
144
196
        # test factory based nested and popping.
145
 
        ui = TextUIFactory()
 
197
        ui = TextUIFactory(None, None, None)
146
198
        pb1 = ui.nested_progress_bar()
147
199
        pb2 = ui.nested_progress_bar()
148
 
        self.assertRaises(errors.MissingProgressBarFinish, pb1.finished)
 
200
        # You do get a warning if the outermost progress bar wasn't finished
 
201
        # first - it's not clear if this is really useful or if it should just
 
202
        # become orphaned -- mbp 20090120
 
203
        warnings, _ = self.callCatchWarnings(pb1.finished)
 
204
        if len(warnings) != 1:
 
205
            self.fail("unexpected warnings: %r" % (warnings,))
149
206
        pb2.finished()
150
207
        pb1.finished()
151
208
 
152
 
    def test_progress_stack(self):
153
 
        # test the progress bar stack which the default text factory 
154
 
        # uses.
 
209
    def test_text_ui_get_boolean(self):
 
210
        stdin = StringIO("y\n" # True
 
211
                         "n\n" # False
 
212
                         "yes with garbage\nY\n" # True
 
213
                         "not an answer\nno\n" # False
 
214
                         "I'm sure!\nyes\n" # True
 
215
                         "NO\n" # False
 
216
                         "foo\n")
 
217
        stdout = StringIO()
155
218
        stderr = StringIO()
156
 
        stdout = StringIO()
157
 
        # make a stack, which accepts parameters like a pb.
158
 
        stack = ProgressBarStack(to_file=stderr, to_messages_file=stdout)
159
 
        # but is not one
160
 
        self.assertFalse(getattr(stack, 'note', False))
161
 
        pb1 = stack.get_nested()
162
 
        pb2 = stack.get_nested()
163
 
        self.assertRaises(errors.MissingProgressBarFinish, pb1.finished)
164
 
        pb2.finished()
165
 
        pb1.finished()
166
 
        # the text ui factory never actually removes the stack once its setup.
167
 
        # we need to be able to nest again correctly from here.
168
 
        pb1 = stack.get_nested()
169
 
        pb2 = stack.get_nested()
170
 
        self.assertRaises(errors.MissingProgressBarFinish, pb1.finished)
171
 
        pb2.finished()
172
 
        pb1.finished()
173
 
 
174
 
    def test_text_factory_setting_progress_bar(self):
175
 
        # we should be able to choose the progress bar type used.
176
 
        factory = TextUIFactory(bar_type=DotsProgressBar)
177
 
        bar = factory.nested_progress_bar()
178
 
        bar.finished()
179
 
        self.assertIsInstance(bar, DotsProgressBar)
180
 
 
181
 
    def test_cli_stdin_is_default_stdin(self):
182
 
        factory = CLIUIFactory()
183
 
        self.assertEqual(sys.stdin, factory.stdin)
184
 
 
185
 
    def assert_get_bool_acceptance_of_user_input(self, factory):
186
 
        factory.stdin = StringIO("y\nyes with garbage\n"
187
 
                                 "yes\nn\nnot an answer\n"
188
 
                                 "no\nfoo\n")
189
 
        factory.stdout = StringIO()
190
 
        # there is no output from the base factory
191
 
        self.assertEqual(True, factory.get_boolean(""))
192
 
        self.assertEqual(True, factory.get_boolean(""))
193
 
        self.assertEqual(False, factory.get_boolean(""))
 
219
        factory = TextUIFactory(stdin, stdout, stderr)
 
220
        self.assertEqual(True, factory.get_boolean(""))
 
221
        self.assertEqual(False, factory.get_boolean(""))
 
222
        self.assertEqual(True, factory.get_boolean(""))
 
223
        self.assertEqual(False, factory.get_boolean(""))
 
224
        self.assertEqual(True, factory.get_boolean(""))
194
225
        self.assertEqual(False, factory.get_boolean(""))
195
226
        self.assertEqual("foo\n", factory.stdin.read())
196
227
        # stdin should be empty
197
228
        self.assertEqual('', factory.stdin.readline())
198
229
 
199
 
    def test_silent_ui_getbool(self):
200
 
        factory = SilentUIFactory()
201
 
        self.assert_get_bool_acceptance_of_user_input(factory)
202
 
 
203
 
    def test_silent_factory_prompts_silently(self):
204
 
        factory = SilentUIFactory()
205
 
        stdout = StringIO()
206
 
        factory.stdin = StringIO("y\n")
207
 
        self.assertEqual(True,
208
 
                         self.apply_redirected(None, stdout, stdout,
209
 
                                               factory.get_boolean, "foo"))
210
 
        self.assertEqual("", stdout.getvalue())
211
 
        # stdin should be empty
212
 
        self.assertEqual('', factory.stdin.readline())
213
 
 
214
 
    def test_text_ui_getbool(self):
215
 
        factory = TextUIFactory()
216
 
        self.assert_get_bool_acceptance_of_user_input(factory)
 
230
    def test_text_factory_prompt(self):
 
231
        # see <https://launchpad.net/bugs/365891>
 
232
        factory = TextUIFactory(StringIO(), StringIO(), StringIO())
 
233
        factory.prompt('foo %2e')
 
234
        self.assertEqual('', factory.stdout.getvalue())
 
235
        self.assertEqual('foo %2e', factory.stderr.getvalue())
217
236
 
218
237
    def test_text_factory_prompts_and_clears(self):
219
238
        # a get_boolean call should clear the pb before prompting
220
 
        factory = TextUIFactory(bar_type=DotsProgressBar)
221
 
        factory.stdout = _TTYStringIO()
222
 
        factory.stdin = StringIO("yada\ny\n")
223
 
        pb = self.apply_redirected(factory.stdin, factory.stdout,
224
 
                                   factory.stdout, factory.nested_progress_bar)
225
 
        pb.start_time = None
226
 
        self.apply_redirected(factory.stdin, factory.stdout,
227
 
                              factory.stdout, pb.update, "foo", 0, 1)
 
239
        out = _TTYStringIO()
 
240
        os.environ['TERM'] = 'xterm'
 
241
        factory = TextUIFactory(stdin=StringIO("yada\ny\n"), stdout=out, stderr=out)
 
242
        pb = factory.nested_progress_bar()
 
243
        pb.show_bar = False
 
244
        pb.show_spinner = False
 
245
        pb.show_count = False
 
246
        pb.update("foo", 0, 1)
228
247
        self.assertEqual(True,
229
248
                         self.apply_redirected(None, factory.stdout,
230
249
                                               factory.stdout,
231
250
                                               factory.get_boolean,
232
251
                                               "what do you want"))
233
 
        output = factory.stdout.getvalue()
234
 
        self.assertEqual("foo: .\n"
235
 
                         "what do you want? [y/n]: what do you want? [y/n]: ",
236
 
                         factory.stdout.getvalue())
 
252
        output = out.getvalue()
 
253
        self.assertContainsRe(factory.stdout.getvalue(),
 
254
            "foo *\r\r  *\r*")
 
255
        self.assertContainsRe(factory.stdout.getvalue(),
 
256
            r"what do you want\? \[y/n\]: what do you want\? \[y/n\]: ")
 
257
        # stdin should have been totally consumed
 
258
        self.assertEqual('', factory.stdin.readline())
 
259
 
 
260
    def test_text_tick_after_update(self):
 
261
        ui_factory = TextUIFactory(stdout=StringIO(), stderr=StringIO())
 
262
        pb = ui_factory.nested_progress_bar()
 
263
        try:
 
264
            pb.update('task', 0, 3)
 
265
            # Reset the clock, so that it actually tries to repaint itself
 
266
            ui_factory._progress_view._last_repaint = time.time() - 1.0
 
267
            pb.tick()
 
268
        finally:
 
269
            pb.finished()
 
270
 
 
271
    def test_text_ui_getusername(self):
 
272
        factory = TextUIFactory(None, None, None)
 
273
        factory.stdin = StringIO("someuser\n\n")
 
274
        factory.stdout = StringIO()
 
275
        factory.stderr = StringIO()
 
276
        factory.stdout.encoding = "utf8"
 
277
        # there is no output from the base factory
 
278
        self.assertEqual("someuser",
 
279
                         factory.get_username('Hello %(host)s', host='some'))
 
280
        self.assertEquals("Hello some: ", factory.stderr.getvalue())
 
281
        self.assertEquals('', factory.stdout.getvalue())
 
282
        self.assertEqual("", factory.get_username("Gebruiker"))
237
283
        # stdin should be empty
238
284
        self.assertEqual('', factory.stdin.readline())
239
285
 
 
286
    def test_text_ui_getusername_utf8(self):
 
287
        ui = tests.TestUIFactory(stdin=u'someuser\u1234'.encode('utf8'),
 
288
                                 stdout=tests.StringIOWrapper(),
 
289
                                 stderr=tests.StringIOWrapper())
 
290
        ui.stderr.encoding = ui.stdout.encoding = ui.stdin.encoding = "utf8"
 
291
        pb = ui.nested_progress_bar()
 
292
        try:
 
293
            # there is no output from the base factory
 
294
            username = self.apply_redirected(ui.stdin, ui.stdout, ui.stderr,
 
295
                ui.get_username, u'Hello\u1234 %(host)s', host=u'some\u1234')
 
296
            self.assertEquals(u"someuser\u1234", username.decode('utf8'))
 
297
            self.assertEquals(u"Hello\u1234 some\u1234: ",
 
298
                              ui.stderr.getvalue().decode("utf8"))
 
299
            self.assertEquals('', ui.stdout.getvalue())
 
300
        finally:
 
301
            pb.finished()
 
302
 
 
303
 
 
304
class CLIUITests(TestCase):
 
305
 
 
306
    def test_cli_factory_deprecated(self):
 
307
        uif = self.applyDeprecated(deprecated_in((1, 18, 0)),
 
308
            CLIUIFactory,
 
309
            StringIO(), StringIO(), StringIO())
 
310
        self.assertIsInstance(uif, UIFactory)
 
311
 
 
312
 
 
313
class SilentUITests(TestCase):
 
314
 
 
315
    def test_silent_factory_get_password(self):
 
316
        # A silent factory that can't do user interaction can't get a
 
317
        # password.  Possibly it should raise a more specific error but it
 
318
        # can't succeed.
 
319
        ui = SilentUIFactory()
 
320
        stdout = StringIO()
 
321
        self.assertRaises(
 
322
            NotImplementedError,
 
323
            self.apply_redirected,
 
324
            None, stdout, stdout, ui.get_password)
 
325
        # and it didn't write anything out either
 
326
        self.assertEqual('', stdout.getvalue())
 
327
 
 
328
    def test_silent_ui_getbool(self):
 
329
        factory = SilentUIFactory()
 
330
        stdout = StringIO()
 
331
        self.assertRaises(
 
332
            NotImplementedError,
 
333
            self.apply_redirected,
 
334
            None, stdout, stdout, factory.get_boolean, "foo")
 
335
 
 
336
 
 
337
class TestUIFactoryTests(TestCase):
 
338
 
 
339
    def test_test_ui_factory_progress(self):
 
340
        # there's no output; we just want to make sure this doesn't crash -
 
341
        # see https://bugs.edge.launchpad.net/bzr/+bug/408201
 
342
        ui = TestUIFactory()
 
343
        pb = ui.nested_progress_bar()
 
344
        pb.update('hello')
 
345
        pb.tick()
 
346
        pb.finished()
 
347
 
 
348
 
 
349
class CannedInputUIFactoryTests(TestCase):
 
350
    
 
351
    def test_canned_input_get_input(self):
 
352
        uif = CannedInputUIFactory([True, 'mbp', 'password'])
 
353
        self.assertEqual(uif.get_boolean('Extra cheese?'), True)
 
354
        self.assertEqual(uif.get_username('Enter your user name'), 'mbp')
 
355
        self.assertEqual(uif.get_password('Password for %(host)s', host='example.com'),
 
356
            'password')
 
357
 
 
358
 
 
359
class TestBoolFromString(tests.TestCase):
 
360
 
 
361
    def assertIsTrue(self, s, accepted_values=None):
 
362
        res = _mod_ui.bool_from_string(s, accepted_values=accepted_values)
 
363
        self.assertEquals(True, res)
 
364
 
 
365
    def assertIsFalse(self, s, accepted_values=None):
 
366
        res = _mod_ui.bool_from_string(s, accepted_values=accepted_values)
 
367
        self.assertEquals(False, res)
 
368
 
 
369
    def assertIsNone(self, s, accepted_values=None):
 
370
        res = _mod_ui.bool_from_string(s, accepted_values=accepted_values)
 
371
        self.assertIs(None, res)
 
372
 
 
373
    def test_know_valid_values(self):
 
374
        self.assertIsTrue('true')
 
375
        self.assertIsFalse('false')
 
376
        self.assertIsTrue('1')
 
377
        self.assertIsFalse('0')
 
378
        self.assertIsTrue('on')
 
379
        self.assertIsFalse('off')
 
380
        self.assertIsTrue('yes')
 
381
        self.assertIsFalse('no')
 
382
        self.assertIsTrue('y')
 
383
        self.assertIsFalse('n')
 
384
        # Also try some case variations
 
385
        self.assertIsTrue('True')
 
386
        self.assertIsFalse('False')
 
387
        self.assertIsTrue('On')
 
388
        self.assertIsFalse('Off')
 
389
        self.assertIsTrue('ON')
 
390
        self.assertIsFalse('OFF')
 
391
        self.assertIsTrue('oN')
 
392
        self.assertIsFalse('oFf')
 
393
 
 
394
    def test_invalid_values(self):
 
395
        self.assertIsNone(None)
 
396
        self.assertIsNone('doubt')
 
397
        self.assertIsNone('frue')
 
398
        self.assertIsNone('talse')
 
399
        self.assertIsNone('42')
 
400
 
 
401
    def test_provided_values(self):
 
402
        av = dict(y=True, n=False, yes=True, no=False)
 
403
        self.assertIsTrue('y', av)
 
404
        self.assertIsTrue('Y', av)
 
405
        self.assertIsTrue('Yes', av)
 
406
        self.assertIsFalse('n', av)
 
407
        self.assertIsFalse('N', av)
 
408
        self.assertIsFalse('No', av)
 
409
        self.assertIsNone('1', av)
 
410
        self.assertIsNone('0', av)
 
411
        self.assertIsNone('on', av)
 
412
        self.assertIsNone('off', av)