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
|
import gc
import sys
import time
import blinker
from nose.tools import assert_raises
jython = sys.platform.startswith('java')
def collect():
if jython:
gc.collect()
time.sleep(0.1)
def test_meta_connect():
sentinel = []
def meta_received(sender, **kw):
sentinel.append(dict(kw, sender=sender))
assert not blinker.receiver_connected.receivers
blinker.receiver_connected.connect(meta_received)
assert not sentinel
def receiver(sender, **kw):
pass
sig = blinker.Signal()
sig.connect(receiver)
assert sentinel == [dict(sender=sig,
receiver_arg=receiver,
sender_arg=blinker.ANY,
weak_arg=True)]
blinker.receiver_connected._clear_state()
def test_meta_connect_failure():
def meta_received(sender, **kw):
raise TypeError('boom')
assert not blinker.receiver_connected.receivers
blinker.receiver_connected.connect(meta_received)
def receiver(sender, **kw):
pass
sig = blinker.Signal()
assert_raises(TypeError, sig.connect, receiver)
assert not sig.receivers
assert not sig._by_receiver
assert sig._by_sender == {blinker.base.ANY_ID: set()}
blinker.receiver_connected._clear_state()
def test_singletons():
ns = blinker.Namespace()
assert not ns
s1 = ns.signal('abc')
assert s1 is ns.signal('abc')
assert s1 is not ns.signal('def')
assert 'abc' in ns
collect()
# weak by default, already out of scope
assert 'def' not in ns
del s1
collect()
assert 'abc' not in ns
def test_weak_receiver():
sentinel = []
def received(sender, **kw):
sentinel.append(kw)
sig = blinker.Signal()
# XXX: weirdly, under jython an explicit weak=True causes this test
# to fail, leaking a strong ref to the receiver somewhere.
# http://bugs.jython.org/issue1586
if jython:
sig.connect(received) # weak=True by default.
else:
sig.connect(received, weak=True)
del received
collect()
assert not sentinel
sig.send()
assert not sentinel
assert not sig.receivers
values_are_empty_sets_(sig._by_receiver)
values_are_empty_sets_(sig._by_sender)
def test_strong_receiver():
sentinel = []
def received(sender):
sentinel.append(sender)
fn_id = id(received)
sig = blinker.Signal()
sig.connect(received, weak=False)
del received
collect()
assert not sentinel
sig.send()
assert sentinel
assert [id(fn) for fn in sig.receivers.values()] == [fn_id]
def test_instancemethod_receiver():
sentinel = []
class Receiver(object):
def __init__(self, bucket):
self.bucket = bucket
def received(self, sender):
self.bucket.append(sender)
receiver = Receiver(sentinel)
sig = blinker.Signal()
sig.connect(receiver.received)
assert not sentinel
sig.send()
assert sentinel
del receiver
collect()
sig.send()
assert len(sentinel) == 1
def test_filtered_receiver():
sentinel = []
def received(sender):
sentinel.append(sender)
sig = blinker.Signal()
sig.connect(received, 123)
assert not sentinel
sig.send()
assert not sentinel
sig.send(123)
assert sentinel == [123]
sig.send()
assert sentinel == [123]
sig.disconnect(received, 123)
sig.send(123)
assert sentinel == [123]
sig.connect(received, 123)
sig.send(123)
assert sentinel == [123, 123]
sig.disconnect(received)
sig.send(123)
assert sentinel == [123, 123]
def test_filtered_receiver_weakref():
sentinel = []
def received(sender):
sentinel.append(sender)
class Object(object):
pass
obj = Object()
sig = blinker.Signal()
sig.connect(received, obj)
assert not sentinel
sig.send(obj)
assert sentinel == [obj]
del sentinel[:]
del obj
collect()
# general index isn't cleaned up
assert sig.receivers
# but receiver/sender pairs are
values_are_empty_sets_(sig._by_receiver)
values_are_empty_sets_(sig._by_sender)
def test_decorated_receiver():
sentinel = []
class Object(object):
pass
obj = Object()
sig = blinker.Signal()
@sig.connect_via(obj)
def receiver(sender, **kw):
sentinel.append(kw)
assert not sentinel
sig.send()
assert not sentinel
sig.send(1)
assert not sentinel
sig.send(obj)
assert sig.receivers
del receiver
collect()
assert sig.receivers
def test_no_double_send():
sentinel = []
def received(sender):
sentinel.append(sender)
sig = blinker.Signal()
sig.connect(received, 123)
sig.connect(received)
assert not sentinel
sig.send()
assert sentinel == [None]
sig.send(123)
assert sentinel == [None, 123]
sig.send()
assert sentinel == [None, 123, None]
def test_has_receivers():
received = lambda sender: None
sig = blinker.Signal()
assert not sig.has_receivers_for(None)
assert not sig.has_receivers_for(blinker.ANY)
sig.connect(received, 'xyz')
assert not sig.has_receivers_for(None)
assert not sig.has_receivers_for(blinker.ANY)
assert sig.has_receivers_for('xyz')
class Object(object):
pass
o = Object()
sig.connect(received, o)
assert sig.has_receivers_for(o)
del received
collect()
assert not sig.has_receivers_for('xyz')
assert list(sig.receivers_for('xyz')) == []
assert list(sig.receivers_for(o)) == []
sig.connect(lambda sender: None, weak=False)
assert sig.has_receivers_for('xyz')
assert sig.has_receivers_for(o)
assert sig.has_receivers_for(None)
assert sig.has_receivers_for(blinker.ANY)
assert sig.has_receivers_for('xyz')
def test_instance_doc():
sig = blinker.Signal(doc='x')
assert sig.__doc__ == 'x'
sig = blinker.Signal('x')
assert sig.__doc__ == 'x'
def test_named_blinker():
sig = blinker.NamedSignal('squiznart')
assert 'squiznart' in repr(sig)
def values_are_empty_sets_(dictionary):
for val in dictionary.values():
assert val == set()
if sys.version_info < (2, 5):
def test_context_manager_warning():
sig = blinker.Signal()
receiver = lambda sender: None
assert_raises(RuntimeError, sig.temporarily_connected_to, receiver)
|