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Viewing changes to bzrlib/tests/test_ui.py

  • Committer: John Arbash Meinel
  • Date: 2008-09-09 15:09:12 UTC
  • mto: This revision was merged to the branch mainline in revision 3699.
  • Revision ID: john@arbash-meinel.com-20080909150912-wyttm8he1zsls2ck
Use the right timing function on win32

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bzrlib/tests/test_ui.py
1
 
# Copyright (C) 2005, 2008, 2009 Canonical Ltd
 
1
# Copyright (C) 2005 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., 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
"""Tests for the bzrlib ui
18
18
"""
21
21
from StringIO import StringIO
22
22
import re
23
23
import sys
24
 
import time
25
24
 
26
 
from bzrlib import (
27
 
    errors,
28
 
    tests,
29
 
    ui as _mod_ui,
30
 
    )
31
 
from bzrlib.symbol_versioning import (
32
 
    deprecated_in,
 
25
import bzrlib
 
26
import bzrlib.errors as errors
 
27
from bzrlib.progress import (
 
28
    DotsProgressBar,
 
29
    ProgressBarStack,
 
30
    TTYProgressBar,
33
31
    )
34
32
from bzrlib.tests import (
35
33
    TestCase,
36
34
    TestUIFactory,
37
35
    StringIOWrapper,
38
36
    )
39
 
from bzrlib.tests.test_progress import (
40
 
    _NonTTYStringIO,
41
 
    _TTYStringIO,
42
 
    )
 
37
from bzrlib.tests.test_progress import _TTYStringIO
43
38
from bzrlib.ui import (
44
 
    CannedInputUIFactory,
45
39
    CLIUIFactory,
46
40
    SilentUIFactory,
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):
 
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())
58
60
 
59
61
    def test_text_factory_ascii_password(self):
60
 
        ui = tests.TestUIFactory(stdin='secret\n',
61
 
                                 stdout=tests.StringIOWrapper(),
62
 
                                 stderr=tests.StringIOWrapper())
 
62
        ui = TestUIFactory(stdin='secret\n', stdout=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.stderr,
 
67
                                                   ui.stdout,
68
68
                                                   ui.get_password))
69
69
            # ': ' is appended to prompt
70
 
            self.assertEqual(': ', ui.stderr.getvalue())
71
 
            self.assertEqual('', ui.stdout.readline())
 
70
            self.assertEqual(': ', ui.stdout.getvalue())
72
71
            # stdin should be empty
73
72
            self.assertEqual('', ui.stdin.readline())
74
73
        finally:
80
79
        We can't predict what encoding users will have for stdin, so we force
81
80
        it to utf8 to test that we transport the password correctly.
82
81
        """
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'
 
82
        ui = TestUIFactory(stdin=u'baz\u1234'.encode('utf8'),
 
83
                           stdout=StringIOWrapper())
 
84
        ui.stdin.encoding = 'utf8'
 
85
        ui.stdout.encoding = ui.stdin.encoding
87
86
        pb = ui.nested_progress_bar()
88
87
        try:
89
 
            password = self.apply_redirected(ui.stdin, ui.stdout, ui.stderr,
 
88
            password = self.apply_redirected(ui.stdin, ui.stdout, ui.stdout,
90
89
                                             ui.get_password,
91
90
                                             u'Hello \u1234 %(user)s',
92
91
                                             user=u'some\u1234')
93
92
            # We use StringIO objects, we need to decode them
94
93
            self.assertEqual(u'baz\u1234', password.decode('utf8'))
95
94
            self.assertEqual(u'Hello \u1234 some\u1234: ',
96
 
                             ui.stderr.getvalue().decode('utf8'))
97
 
            # stdin and stdout should be empty
 
95
                             ui.stdout.getvalue().decode('utf8'))
 
96
            # stdin should be empty
98
97
            self.assertEqual('', ui.stdin.readline())
99
 
            self.assertEqual('', ui.stdout.readline())
100
98
        finally:
101
99
            pb.finished()
102
100
 
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
 
 
153
101
    def test_progress_note(self):
154
102
        stderr = StringIO()
155
103
        stdout = StringIO()
156
 
        ui_factory = TextUIFactory(stdin=StringIO(''),
157
 
            stderr=stderr,
158
 
            stdout=stdout)
 
104
        ui_factory = TextUIFactory(bar_type=TTYProgressBar)
159
105
        pb = ui_factory.nested_progress_bar()
160
106
        try:
 
107
            pb.to_messages_file = stdout
 
108
            ui_factory._progress_bar_stack.bottom().to_file = stderr
161
109
            result = pb.note('t')
162
110
            self.assertEqual(None, result)
163
111
            self.assertEqual("t\n", stdout.getvalue())
169
117
            pb.finished()
170
118
 
171
119
    def test_progress_note_clears(self):
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)
 
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)
181
126
        pb = ui_factory.nested_progress_bar()
182
127
        try:
 
128
            pb.to_messages_file = stdout
 
129
            ui_factory._progress_bar_stack.bottom().to_file = stderr
183
130
            # Create a progress update that isn't throttled
 
131
            pb.start_time -= 10
184
132
            pb.update('x', 1, 1)
185
133
            result = pb.note('t')
186
134
            self.assertEqual(None, result)
194
142
 
195
143
    def test_progress_nested(self):
196
144
        # test factory based nested and popping.
197
 
        ui = TextUIFactory(None, None, None)
 
145
        ui = TextUIFactory()
198
146
        pb1 = ui.nested_progress_bar()
199
147
        pb2 = ui.nested_progress_bar()
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,))
 
148
        self.assertRaises(errors.MissingProgressBarFinish, pb1.finished)
206
149
        pb2.finished()
207
150
        pb1.finished()
208
151
 
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")
 
152
    def test_progress_stack(self):
 
153
        # test the progress bar stack which the default text factory 
 
154
        # uses.
 
155
        stderr = StringIO()
217
156
        stdout = StringIO()
218
 
        stderr = StringIO()
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(""))
 
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(""))
225
194
        self.assertEqual(False, factory.get_boolean(""))
226
195
        self.assertEqual("foo\n", factory.stdin.read())
227
196
        # stdin should be empty
228
197
        self.assertEqual('', factory.stdin.readline())
229
198
 
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())
 
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)
236
217
 
237
218
    def test_text_factory_prompts_and_clears(self):
238
219
        # a get_boolean call should clear the pb before prompting
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)
 
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)
247
228
        self.assertEqual(True,
248
229
                         self.apply_redirected(None, factory.stdout,
249
230
                                               factory.stdout,
250
231
                                               factory.get_boolean,
251
232
                                               "what do you want"))
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"))
 
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())
283
237
        # stdin should be empty
284
238
        self.assertEqual('', factory.stdin.readline())
285
239
 
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)