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
|
import threading
import time
import unittest
import cherrypy
from cherrypy._cpcompat import get_daemon, set
from cherrypy.process import wspbus
msg = "Listener %d on channel %s: %s."
class PublishSubscribeTests(unittest.TestCase):
def get_listener(self, channel, index):
def listener(arg=None):
self.responses.append(msg % (index, channel, arg))
return listener
def test_builtin_channels(self):
b = wspbus.Bus()
self.responses, expected = [], []
for channel in b.listeners:
for index, priority in enumerate([100, 50, 0, 51]):
b.subscribe(channel, self.get_listener(channel, index), priority)
for channel in b.listeners:
b.publish(channel)
expected.extend([msg % (i, channel, None) for i in (2, 1, 3, 0)])
b.publish(channel, arg=79347)
expected.extend([msg % (i, channel, 79347) for i in (2, 1, 3, 0)])
self.assertEqual(self.responses, expected)
def test_custom_channels(self):
b = wspbus.Bus()
self.responses, expected = [], []
custom_listeners = ('hugh', 'louis', 'dewey')
for channel in custom_listeners:
for index, priority in enumerate([None, 10, 60, 40]):
b.subscribe(channel, self.get_listener(channel, index), priority)
for channel in custom_listeners:
b.publish(channel, 'ah so')
expected.extend([msg % (i, channel, 'ah so') for i in (1, 3, 0, 2)])
b.publish(channel)
expected.extend([msg % (i, channel, None) for i in (1, 3, 0, 2)])
self.assertEqual(self.responses, expected)
def test_listener_errors(self):
b = wspbus.Bus()
self.responses, expected = [], []
channels = [c for c in b.listeners if c != 'log']
for channel in channels:
b.subscribe(channel, self.get_listener(channel, 1))
# This will break since the lambda takes no args.
b.subscribe(channel, lambda: None, priority=20)
for channel in channels:
self.assertRaises(wspbus.ChannelFailures, b.publish, channel, 123)
expected.append(msg % (1, channel, 123))
self.assertEqual(self.responses, expected)
class BusMethodTests(unittest.TestCase):
def log(self, bus):
self._log_entries = []
def logit(msg, level):
self._log_entries.append(msg)
bus.subscribe('log', logit)
def assertLog(self, entries):
self.assertEqual(self._log_entries, entries)
def get_listener(self, channel, index):
def listener(arg=None):
self.responses.append(msg % (index, channel, arg))
return listener
def test_start(self):
b = wspbus.Bus()
self.log(b)
self.responses = []
num = 3
for index in range(num):
b.subscribe('start', self.get_listener('start', index))
b.start()
try:
# The start method MUST call all 'start' listeners.
self.assertEqual(set(self.responses),
set([msg % (i, 'start', None) for i in range(num)]))
# The start method MUST move the state to STARTED
# (or EXITING, if errors occur)
self.assertEqual(b.state, b.states.STARTED)
# The start method MUST log its states.
self.assertLog(['Bus STARTING', 'Bus STARTED'])
finally:
# Exit so the atexit handler doesn't complain.
b.exit()
def test_stop(self):
b = wspbus.Bus()
self.log(b)
self.responses = []
num = 3
for index in range(num):
b.subscribe('stop', self.get_listener('stop', index))
b.stop()
# The stop method MUST call all 'stop' listeners.
self.assertEqual(set(self.responses),
set([msg % (i, 'stop', None) for i in range(num)]))
# The stop method MUST move the state to STOPPED
self.assertEqual(b.state, b.states.STOPPED)
# The stop method MUST log its states.
self.assertLog(['Bus STOPPING', 'Bus STOPPED'])
def test_graceful(self):
b = wspbus.Bus()
self.log(b)
self.responses = []
num = 3
for index in range(num):
b.subscribe('graceful', self.get_listener('graceful', index))
b.graceful()
# The graceful method MUST call all 'graceful' listeners.
self.assertEqual(set(self.responses),
set([msg % (i, 'graceful', None) for i in range(num)]))
# The graceful method MUST log its states.
self.assertLog(['Bus graceful'])
def test_exit(self):
b = wspbus.Bus()
self.log(b)
self.responses = []
num = 3
for index in range(num):
b.subscribe('stop', self.get_listener('stop', index))
b.subscribe('exit', self.get_listener('exit', index))
b.exit()
# The exit method MUST call all 'stop' listeners,
# and then all 'exit' listeners.
self.assertEqual(set(self.responses),
set([msg % (i, 'stop', None) for i in range(num)] +
[msg % (i, 'exit', None) for i in range(num)]))
# The exit method MUST move the state to EXITING
self.assertEqual(b.state, b.states.EXITING)
# The exit method MUST log its states.
self.assertLog(['Bus STOPPING', 'Bus STOPPED', 'Bus EXITING', 'Bus EXITED'])
def test_wait(self):
b = wspbus.Bus()
def f(method):
time.sleep(0.2)
getattr(b, method)()
for method, states in [('start', [b.states.STARTED]),
('stop', [b.states.STOPPED]),
('start', [b.states.STARTING, b.states.STARTED]),
('exit', [b.states.EXITING]),
]:
threading.Thread(target=f, args=(method,)).start()
b.wait(states)
# The wait method MUST wait for the given state(s).
if b.state not in states:
self.fail("State %r not in %r" % (b.state, states))
def test_block(self):
b = wspbus.Bus()
self.log(b)
def f():
time.sleep(0.2)
b.exit()
def g():
time.sleep(0.4)
threading.Thread(target=f).start()
threading.Thread(target=g).start()
threads = [t for t in threading.enumerate() if not get_daemon(t)]
self.assertEqual(len(threads), 3)
b.block()
# The block method MUST wait for the EXITING state.
self.assertEqual(b.state, b.states.EXITING)
# The block method MUST wait for ALL non-main, non-daemon threads to finish.
threads = [t for t in threading.enumerate() if not get_daemon(t)]
self.assertEqual(len(threads), 1)
# The last message will mention an indeterminable thread name; ignore it
self.assertEqual(self._log_entries[:-1],
['Bus STOPPING', 'Bus STOPPED',
'Bus EXITING', 'Bus EXITED',
'Waiting for child threads to terminate...'])
def test_start_with_callback(self):
b = wspbus.Bus()
self.log(b)
try:
events = []
def f(*args, **kwargs):
events.append(("f", args, kwargs))
def g():
events.append("g")
b.subscribe("start", g)
b.start_with_callback(f, (1, 3, 5), {"foo": "bar"})
# Give wait() time to run f()
time.sleep(0.2)
# The callback method MUST wait for the STARTED state.
self.assertEqual(b.state, b.states.STARTED)
# The callback method MUST run after all start methods.
self.assertEqual(events, ["g", ("f", (1, 3, 5), {"foo": "bar"})])
finally:
b.exit()
def test_log(self):
b = wspbus.Bus()
self.log(b)
self.assertLog([])
# Try a normal message.
expected = []
for msg in ["O mah darlin'"] * 3 + ["Clementiiiiiiiine"]:
b.log(msg)
expected.append(msg)
self.assertLog(expected)
# Try an error message
try:
foo
except NameError:
b.log("You are lost and gone forever", traceback=True)
lastmsg = self._log_entries[-1]
if "Traceback" not in lastmsg or "NameError" not in lastmsg:
self.fail("Last log message %r did not contain "
"the expected traceback." % lastmsg)
else:
self.fail("NameError was not raised as expected.")
if __name__ == "__main__":
unittest.main()
|
