1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
|
# -*- coding: utf-8 -*-
#
# test/test_runner.py
# Part of ‘python-daemon’, an implementation of PEP 3143.
#
# Copyright © 2009–2015 Ben Finney <ben+python@benfinney.id.au>
#
# This is free software: you may copy, modify, and/or distribute this work
# under the terms of the Apache License, version 2.0 as published by the
# Apache Software Foundation.
# No warranty expressed or implied. See the file ‘LICENSE.ASF-2’ for details.
""" Unit test for ‘runner’ module.
"""
from __future__ import (absolute_import, unicode_literals)
try:
# Python 3 standard library.
import builtins
except ImportError:
# Python 2 standard library.
import __builtin__ as builtins
import os
import os.path
import sys
import tempfile
import errno
import signal
import functools
import lockfile
import mock
import testtools
from . import scaffold
from .scaffold import (basestring, unicode)
from .test_pidfile import (
FakeFileDescriptorStringIO,
setup_pidfile_fixtures,
make_pidlockfile_scenarios,
apply_lockfile_method_mocks,
)
from .test_daemon import (
setup_streams_fixtures,
)
import daemon.daemon
import daemon.runner
import daemon.pidfile
class ModuleExceptions_TestCase(scaffold.Exception_TestCase):
""" Test cases for module exception classes. """
scenarios = scaffold.make_exception_scenarios([
('daemon.runner.DaemonRunnerError', dict(
exc_type = daemon.runner.DaemonRunnerError,
min_args = 1,
types = [Exception],
)),
('daemon.runner.DaemonRunnerInvalidActionError', dict(
exc_type = daemon.runner.DaemonRunnerInvalidActionError,
min_args = 1,
types = [daemon.runner.DaemonRunnerError, ValueError],
)),
('daemon.runner.DaemonRunnerStartFailureError', dict(
exc_type = daemon.runner.DaemonRunnerStartFailureError,
min_args = 1,
types = [daemon.runner.DaemonRunnerError, RuntimeError],
)),
('daemon.runner.DaemonRunnerStopFailureError', dict(
exc_type = daemon.runner.DaemonRunnerStopFailureError,
min_args = 1,
types = [daemon.runner.DaemonRunnerError, RuntimeError],
)),
])
def make_runner_scenarios():
""" Make a collection of scenarios for testing `DaemonRunner` instances.
:return: A collection of scenarios for tests involving
`DaemonRunner` instances.
The collection is a mapping from scenario name to a dictionary of
scenario attributes.
"""
pidlockfile_scenarios = make_pidlockfile_scenarios()
scenarios = {
'simple': {
'pidlockfile_scenario_name': 'simple',
},
'pidfile-locked': {
'pidlockfile_scenario_name': 'exist-other-pid-locked',
},
}
for scenario in scenarios.values():
if 'pidlockfile_scenario_name' in scenario:
pidlockfile_scenario = pidlockfile_scenarios.pop(
scenario['pidlockfile_scenario_name'])
scenario['pid'] = pidlockfile_scenario['pid']
scenario['pidfile_path'] = pidlockfile_scenario['pidfile_path']
scenario['pidfile_timeout'] = 23
scenario['pidlockfile_scenario'] = pidlockfile_scenario
return scenarios
def set_runner_scenario(testcase, scenario_name):
""" Set the DaemonRunner test scenario for the test case.
:param testcase: The `TestCase` instance to decorate.
:param scenario_name: The name of the scenario to use.
Set the `DaemonRunner` test scenario name and decorate the
`testcase` with the corresponding scenario fixtures.
"""
scenarios = testcase.runner_scenarios
testcase.scenario = scenarios[scenario_name]
apply_lockfile_method_mocks(
testcase.mock_runner_lockfile,
testcase,
testcase.scenario['pidlockfile_scenario'])
def setup_runner_fixtures(testcase):
""" Set up common fixtures for `DaemonRunner` test cases.
:param testcase: A `TestCase` instance to decorate.
Decorate the `testcase` with attributes to be fixtures for tests
involving `DaemonRunner` instances.
"""
setup_pidfile_fixtures(testcase)
setup_streams_fixtures(testcase)
testcase.runner_scenarios = make_runner_scenarios()
patcher_stderr = mock.patch.object(
sys, "stderr",
new=FakeFileDescriptorStringIO())
testcase.fake_stderr = patcher_stderr.start()
testcase.addCleanup(patcher_stderr.stop)
simple_scenario = testcase.runner_scenarios['simple']
testcase.mock_runner_lockfile = mock.MagicMock(
spec=daemon.pidfile.TimeoutPIDLockFile)
apply_lockfile_method_mocks(
testcase.mock_runner_lockfile,
testcase,
simple_scenario['pidlockfile_scenario'])
testcase.mock_runner_lockfile.path = simple_scenario['pidfile_path']
patcher_lockfile_class = mock.patch.object(
daemon.pidfile, "TimeoutPIDLockFile",
return_value=testcase.mock_runner_lockfile)
patcher_lockfile_class.start()
testcase.addCleanup(patcher_lockfile_class.stop)
class TestApp(object):
def __init__(self):
self.stdin_path = testcase.stream_file_paths['stdin']
self.stdout_path = testcase.stream_file_paths['stdout']
self.stderr_path = testcase.stream_file_paths['stderr']
self.pidfile_path = simple_scenario['pidfile_path']
self.pidfile_timeout = simple_scenario['pidfile_timeout']
run = mock.MagicMock(name="TestApp.run")
testcase.TestApp = TestApp
patcher_runner_daemoncontext = mock.patch.object(
daemon.runner, "DaemonContext", autospec=True)
patcher_runner_daemoncontext.start()
testcase.addCleanup(patcher_runner_daemoncontext.stop)
testcase.test_app = testcase.TestApp()
testcase.test_program_name = "bazprog"
testcase.test_program_path = os.path.join(
"/foo/bar", testcase.test_program_name)
testcase.valid_argv_params = {
'start': [testcase.test_program_path, 'start'],
'stop': [testcase.test_program_path, 'stop'],
'restart': [testcase.test_program_path, 'restart'],
}
def fake_open(filename, mode=None, buffering=None):
if filename in testcase.stream_files_by_path:
result = testcase.stream_files_by_path[filename]
else:
result = FakeFileDescriptorStringIO()
result.mode = mode
result.buffering = buffering
return result
mock_open = mock.mock_open()
mock_open.side_effect = fake_open
func_patcher_builtin_open = mock.patch.object(
builtins, "open",
new=mock_open)
func_patcher_builtin_open.start()
testcase.addCleanup(func_patcher_builtin_open.stop)
func_patcher_os_kill = mock.patch.object(os, "kill")
func_patcher_os_kill.start()
testcase.addCleanup(func_patcher_os_kill.stop)
patcher_sys_argv = mock.patch.object(
sys, "argv",
new=testcase.valid_argv_params['start'])
patcher_sys_argv.start()
testcase.addCleanup(patcher_sys_argv.stop)
testcase.test_instance = daemon.runner.DaemonRunner(testcase.test_app)
testcase.scenario = NotImplemented
class DaemonRunner_BaseTestCase(scaffold.TestCase):
""" Base class for DaemonRunner test case classes. """
def setUp(self):
""" Set up test fixtures. """
super(DaemonRunner_BaseTestCase, self).setUp()
setup_runner_fixtures(self)
set_runner_scenario(self, 'simple')
class DaemonRunner_TestCase(DaemonRunner_BaseTestCase):
""" Test cases for DaemonRunner class. """
def setUp(self):
""" Set up test fixtures. """
super(DaemonRunner_TestCase, self).setUp()
func_patcher_parse_args = mock.patch.object(
daemon.runner.DaemonRunner, "parse_args")
func_patcher_parse_args.start()
self.addCleanup(func_patcher_parse_args.stop)
# Create a new instance now with our custom patches.
self.test_instance = daemon.runner.DaemonRunner(self.test_app)
def test_instantiate(self):
""" New instance of DaemonRunner should be created. """
self.assertIsInstance(self.test_instance, daemon.runner.DaemonRunner)
def test_parses_commandline_args(self):
""" Should parse commandline arguments. """
self.test_instance.parse_args.assert_called_with()
def test_has_specified_app(self):
""" Should have specified application object. """
self.assertIs(self.test_app, self.test_instance.app)
def test_sets_pidfile_none_when_pidfile_path_is_none(self):
""" Should set ‘pidfile’ to ‘None’ when ‘pidfile_path’ is ‘None’. """
pidfile_path = None
self.test_app.pidfile_path = pidfile_path
expected_pidfile = None
instance = daemon.runner.DaemonRunner(self.test_app)
self.assertIs(expected_pidfile, instance.pidfile)
def test_error_when_pidfile_path_not_string(self):
""" Should raise ValueError when PID file path not a string. """
pidfile_path = object()
self.test_app.pidfile_path = pidfile_path
expected_error = ValueError
self.assertRaises(
expected_error,
daemon.runner.DaemonRunner, self.test_app)
def test_error_when_pidfile_path_not_absolute(self):
""" Should raise ValueError when PID file path not absolute. """
pidfile_path = "foo/bar.pid"
self.test_app.pidfile_path = pidfile_path
expected_error = ValueError
self.assertRaises(
expected_error,
daemon.runner.DaemonRunner, self.test_app)
def test_creates_lock_with_specified_parameters(self):
""" Should create a TimeoutPIDLockFile with specified params. """
pidfile_path = self.scenario['pidfile_path']
pidfile_timeout = self.scenario['pidfile_timeout']
daemon.pidfile.TimeoutPIDLockFile.assert_called_with(
pidfile_path, pidfile_timeout)
def test_has_created_pidfile(self):
""" Should have new PID lock file as `pidfile` attribute. """
expected_pidfile = self.mock_runner_lockfile
instance = self.test_instance
self.assertIs(
expected_pidfile, instance.pidfile)
def test_daemon_context_has_created_pidfile(self):
""" DaemonContext component should have new PID lock file. """
expected_pidfile = self.mock_runner_lockfile
daemon_context = self.test_instance.daemon_context
self.assertIs(
expected_pidfile, daemon_context.pidfile)
def test_daemon_context_has_specified_stdin_stream(self):
""" DaemonContext component should have specified stdin file. """
test_app = self.test_app
expected_file = self.stream_files_by_name['stdin']
daemon_context = self.test_instance.daemon_context
self.assertEqual(expected_file, daemon_context.stdin)
def test_daemon_context_has_stdin_in_read_mode(self):
""" DaemonContext component should open stdin file for read. """
expected_mode = 'rt'
daemon_context = self.test_instance.daemon_context
self.assertIn(expected_mode, daemon_context.stdin.mode)
def test_daemon_context_has_specified_stdout_stream(self):
""" DaemonContext component should have specified stdout file. """
test_app = self.test_app
expected_file = self.stream_files_by_name['stdout']
daemon_context = self.test_instance.daemon_context
self.assertEqual(expected_file, daemon_context.stdout)
def test_daemon_context_has_stdout_in_append_mode(self):
""" DaemonContext component should open stdout file for append. """
expected_mode = 'w+t'
daemon_context = self.test_instance.daemon_context
self.assertIn(expected_mode, daemon_context.stdout.mode)
def test_daemon_context_has_specified_stderr_stream(self):
""" DaemonContext component should have specified stderr file. """
test_app = self.test_app
expected_file = self.stream_files_by_name['stderr']
daemon_context = self.test_instance.daemon_context
self.assertEqual(expected_file, daemon_context.stderr)
def test_daemon_context_has_stderr_in_append_mode(self):
""" DaemonContext component should open stderr file for append. """
expected_mode = 'w+t'
daemon_context = self.test_instance.daemon_context
self.assertIn(expected_mode, daemon_context.stderr.mode)
def test_daemon_context_has_stderr_with_no_buffering(self):
""" DaemonContext component should open stderr file unbuffered. """
expected_buffering = 0
daemon_context = self.test_instance.daemon_context
self.assertEqual(
expected_buffering, daemon_context.stderr.buffering)
class DaemonRunner_usage_exit_TestCase(DaemonRunner_BaseTestCase):
""" Test cases for DaemonRunner.usage_exit method. """
def test_raises_system_exit(self):
""" Should raise SystemExit exception. """
instance = self.test_instance
argv = [self.test_program_path]
self.assertRaises(
SystemExit,
instance._usage_exit, argv)
def test_message_follows_conventional_format(self):
""" Should emit a conventional usage message. """
instance = self.test_instance
argv = [self.test_program_path]
expected_stderr_output = """\
usage: {progname} ...
""".format(
progname=self.test_program_name)
self.assertRaises(
SystemExit,
instance._usage_exit, argv)
self.assertOutputCheckerMatch(
expected_stderr_output, self.fake_stderr.getvalue())
class DaemonRunner_parse_args_TestCase(DaemonRunner_BaseTestCase):
""" Test cases for DaemonRunner.parse_args method. """
def setUp(self):
""" Set up test fixtures. """
super(DaemonRunner_parse_args_TestCase, self).setUp()
func_patcher_usage_exit = mock.patch.object(
daemon.runner.DaemonRunner, "_usage_exit",
side_effect=NotImplementedError)
func_patcher_usage_exit.start()
self.addCleanup(func_patcher_usage_exit.stop)
def test_emits_usage_message_if_insufficient_args(self):
""" Should emit a usage message and exit if too few arguments. """
instance = self.test_instance
argv = [self.test_program_path]
exc = self.assertRaises(
NotImplementedError,
instance.parse_args, argv)
daemon.runner.DaemonRunner._usage_exit.assert_called_with(argv)
def test_emits_usage_message_if_unknown_action_arg(self):
""" Should emit a usage message and exit if unknown action. """
instance = self.test_instance
progname = self.test_program_name
argv = [self.test_program_path, 'bogus']
exc = self.assertRaises(
NotImplementedError,
instance.parse_args, argv)
daemon.runner.DaemonRunner._usage_exit.assert_called_with(argv)
def test_should_parse_system_argv_by_default(self):
""" Should parse sys.argv by default. """
instance = self.test_instance
expected_action = 'start'
argv = self.valid_argv_params['start']
with mock.patch.object(sys, "argv", new=argv):
instance.parse_args()
self.assertEqual(expected_action, instance.action)
def test_sets_action_from_first_argument(self):
""" Should set action from first commandline argument. """
instance = self.test_instance
for name, argv in self.valid_argv_params.items():
expected_action = name
instance.parse_args(argv)
self.assertEqual(expected_action, instance.action)
try:
ProcessLookupError
except NameError:
# Python 2 uses OSError.
ProcessLookupError = functools.partial(OSError, errno.ESRCH)
class DaemonRunner_do_action_TestCase(DaemonRunner_BaseTestCase):
""" Test cases for DaemonRunner.do_action method. """
def test_raises_error_if_unknown_action(self):
""" Should emit a usage message and exit if action is unknown. """
instance = self.test_instance
instance.action = 'bogus'
expected_error = daemon.runner.DaemonRunnerInvalidActionError
self.assertRaises(
expected_error,
instance.do_action)
class DaemonRunner_do_action_start_TestCase(DaemonRunner_BaseTestCase):
""" Test cases for DaemonRunner.do_action method, action 'start'. """
def setUp(self):
""" Set up test fixtures. """
super(DaemonRunner_do_action_start_TestCase, self).setUp()
self.test_instance.action = 'start'
def test_raises_error_if_pidfile_locked(self):
""" Should raise error if PID file is locked. """
instance = self.test_instance
instance.daemon_context.open.side_effect = lockfile.AlreadyLocked
pidfile_path = self.scenario['pidfile_path']
expected_error = daemon.runner.DaemonRunnerStartFailureError
expected_message_content = pidfile_path
exc = self.assertRaises(
expected_error,
instance.do_action)
self.assertIn(expected_message_content, unicode(exc))
def test_breaks_lock_if_no_such_process(self):
""" Should request breaking lock if PID file process is not running. """
set_runner_scenario(self, 'pidfile-locked')
instance = self.test_instance
self.mock_runner_lockfile.read_pid.return_value = (
self.scenario['pidlockfile_scenario']['pidfile_pid'])
pidfile_path = self.scenario['pidfile_path']
test_pid = self.scenario['pidlockfile_scenario']['pidfile_pid']
expected_signal = signal.SIG_DFL
test_error = ProcessLookupError("Not running")
os.kill.side_effect = test_error
instance.do_action()
os.kill.assert_called_with(test_pid, expected_signal)
self.mock_runner_lockfile.break_lock.assert_called_with()
def test_requests_daemon_context_open(self):
""" Should request the daemon context to open. """
instance = self.test_instance
instance.do_action()
instance.daemon_context.open.assert_called_with()
def test_emits_start_message_to_stderr(self):
""" Should emit start message to stderr. """
instance = self.test_instance
expected_stderr = """\
started with pid {pid:d}
""".format(
pid=self.scenario['pid'])
instance.do_action()
self.assertOutputCheckerMatch(
expected_stderr, self.fake_stderr.getvalue())
def test_requests_app_run(self):
""" Should request the application to run. """
instance = self.test_instance
instance.do_action()
self.test_app.run.assert_called_with()
class DaemonRunner_do_action_stop_TestCase(DaemonRunner_BaseTestCase):
""" Test cases for DaemonRunner.do_action method, action 'stop'. """
def setUp(self):
""" Set up test fixtures. """
super(DaemonRunner_do_action_stop_TestCase, self).setUp()
set_runner_scenario(self, 'pidfile-locked')
self.test_instance.action = 'stop'
self.mock_runner_lockfile.is_locked.return_value = True
self.mock_runner_lockfile.i_am_locking.return_value = False
self.mock_runner_lockfile.read_pid.return_value = (
self.scenario['pidlockfile_scenario']['pidfile_pid'])
def test_raises_error_if_pidfile_not_locked(self):
""" Should raise error if PID file is not locked. """
set_runner_scenario(self, 'simple')
instance = self.test_instance
self.mock_runner_lockfile.is_locked.return_value = False
self.mock_runner_lockfile.i_am_locking.return_value = False
self.mock_runner_lockfile.read_pid.return_value = (
self.scenario['pidlockfile_scenario']['pidfile_pid'])
pidfile_path = self.scenario['pidfile_path']
expected_error = daemon.runner.DaemonRunnerStopFailureError
expected_message_content = pidfile_path
exc = self.assertRaises(
expected_error,
instance.do_action)
self.assertIn(expected_message_content, unicode(exc))
def test_breaks_lock_if_pidfile_stale(self):
""" Should break lock if PID file is stale. """
instance = self.test_instance
pidfile_path = self.scenario['pidfile_path']
test_pid = self.scenario['pidlockfile_scenario']['pidfile_pid']
expected_signal = signal.SIG_DFL
test_error = OSError(errno.ESRCH, "Not running")
os.kill.side_effect = test_error
instance.do_action()
self.mock_runner_lockfile.break_lock.assert_called_with()
def test_sends_terminate_signal_to_process_from_pidfile(self):
""" Should send SIGTERM to the daemon process. """
instance = self.test_instance
test_pid = self.scenario['pidlockfile_scenario']['pidfile_pid']
expected_signal = signal.SIGTERM
instance.do_action()
os.kill.assert_called_with(test_pid, expected_signal)
def test_raises_error_if_cannot_send_signal_to_process(self):
""" Should raise error if cannot send signal to daemon process. """
instance = self.test_instance
test_pid = self.scenario['pidlockfile_scenario']['pidfile_pid']
pidfile_path = self.scenario['pidfile_path']
test_error = OSError(errno.EPERM, "Nice try")
os.kill.side_effect = test_error
expected_error = daemon.runner.DaemonRunnerStopFailureError
expected_message_content = unicode(test_pid)
exc = self.assertRaises(
expected_error,
instance.do_action)
self.assertIn(expected_message_content, unicode(exc))
@mock.patch.object(daemon.runner.DaemonRunner, "_start")
@mock.patch.object(daemon.runner.DaemonRunner, "_stop")
class DaemonRunner_do_action_restart_TestCase(DaemonRunner_BaseTestCase):
""" Test cases for DaemonRunner.do_action method, action 'restart'. """
def setUp(self):
""" Set up test fixtures. """
super(DaemonRunner_do_action_restart_TestCase, self).setUp()
set_runner_scenario(self, 'pidfile-locked')
self.test_instance.action = 'restart'
def test_requests_stop_then_start(
self,
mock_func_daemonrunner_start, mock_func_daemonrunner_stop):
""" Should request stop, then start. """
instance = self.test_instance
instance.do_action()
mock_func_daemonrunner_start.assert_called_with()
mock_func_daemonrunner_stop.assert_called_with()
@mock.patch.object(sys, "stderr")
class emit_message_TestCase(scaffold.TestCase):
""" Test cases for ‘emit_message’ function. """
def test_writes_specified_message_to_stream(self, mock_stderr):
""" Should write specified message to stream. """
test_message = self.getUniqueString()
expected_content = "{message}\n".format(message=test_message)
daemon.runner.emit_message(test_message, stream=mock_stderr)
mock_stderr.write.assert_called_with(expected_content)
def test_writes_to_specified_stream(self, mock_stderr):
""" Should write message to specified stream. """
test_message = self.getUniqueString()
mock_stream = mock.MagicMock()
daemon.runner.emit_message(test_message, stream=mock_stream)
mock_stream.write.assert_called_with(mock.ANY)
def test_writes_to_stderr_by_default(self, mock_stderr):
""" Should write message to ‘sys.stderr’ by default. """
test_message = self.getUniqueString()
daemon.runner.emit_message(test_message)
mock_stderr.write.assert_called_with(mock.ANY)
class is_pidfile_stale_TestCase(scaffold.TestCase):
""" Test cases for ‘is_pidfile_stale’ function. """
def setUp(self):
""" Set up test fixtures. """
super(is_pidfile_stale_TestCase, self).setUp()
func_patcher_os_kill = mock.patch.object(os, "kill")
func_patcher_os_kill.start()
self.addCleanup(func_patcher_os_kill.stop)
os.kill.return_value = None
self.test_pid = self.getUniqueInteger()
self.test_pidfile = mock.MagicMock(daemon.pidfile.TimeoutPIDLockFile)
self.test_pidfile.read_pid.return_value = self.test_pid
def test_returns_false_if_no_pid_in_file(self):
""" Should return False if the pidfile contains no PID. """
self.test_pidfile.read_pid.return_value = None
expected_result = False
result = daemon.runner.is_pidfile_stale(self.test_pidfile)
self.assertEqual(expected_result, result)
def test_returns_false_if_process_exists(self):
""" Should return False if the process with its PID exists. """
expected_result = False
result = daemon.runner.is_pidfile_stale(self.test_pidfile)
self.assertEqual(expected_result, result)
def test_returns_true_if_process_does_not_exist(self):
""" Should return True if the process does not exist. """
test_error = ProcessLookupError("No such process")
del os.kill.return_value
os.kill.side_effect = test_error
expected_result = True
result = daemon.runner.is_pidfile_stale(self.test_pidfile)
self.assertEqual(expected_result, result)
# Local variables:
# coding: utf-8
# mode: python
# End:
# vim: fileencoding=utf-8 filetype=python :
|