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
|
#!/usr/bin/env python
# test_notify.py - unit test for async notifications
#
# Copyright (C) 2010-2019 Daniele Varrazzo <daniele.varrazzo@gmail.com>
# Copyright (C) 2020 The Psycopg Team
#
# psycopg2 is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# In addition, as a special exception, the copyright holders give
# permission to link this program with the OpenSSL library (or with
# modified versions of OpenSSL that use the same license as OpenSSL),
# and distribute linked combinations including the two.
#
# You must obey the GNU Lesser General Public License in all respects for
# all of the code used other than OpenSSL.
#
# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
# License for more details.
import unittest
from collections import deque
import psycopg2
from psycopg2 import extensions
from psycopg2.extensions import Notify
from .testutils import ConnectingTestCase, skip_if_crdb, slow
from .testconfig import dsn
import sys
import time
import select
from subprocess import Popen, PIPE
@skip_if_crdb
class NotifiesTests(ConnectingTestCase):
def autocommit(self, conn):
"""Set a connection in autocommit mode."""
conn.set_isolation_level(extensions.ISOLATION_LEVEL_AUTOCOMMIT)
def listen(self, name):
"""Start listening for a name on self.conn."""
curs = self.conn.cursor()
curs.execute("LISTEN " + name)
curs.close()
def notify(self, name, sec=0, payload=None):
"""Send a notification to the database, eventually after some time."""
if payload is None:
payload = ''
else:
payload = ", %r" % payload
script = ("""\
import time
time.sleep(%(sec)s)
import %(module)s as psycopg2
import %(module)s.extensions as ext
conn = psycopg2.connect(%(dsn)r)
conn.set_isolation_level(ext.ISOLATION_LEVEL_AUTOCOMMIT)
print(conn.info.backend_pid)
curs = conn.cursor()
curs.execute("NOTIFY " %(name)r %(payload)r)
curs.close()
conn.close()
""" % {
'module': psycopg2.__name__,
'dsn': dsn, 'sec': sec, 'name': name, 'payload': payload})
return Popen([sys.executable, '-c', script], stdout=PIPE)
@slow
def test_notifies_received_on_poll(self):
self.autocommit(self.conn)
self.listen('foo')
proc = self.notify('foo', 1)
t0 = time.time()
select.select([self.conn], [], [], 5)
t1 = time.time()
self.assert_(0.99 < t1 - t0 < 4, t1 - t0)
pid = int(proc.communicate()[0])
self.assertEqual(0, len(self.conn.notifies))
self.assertEqual(extensions.POLL_OK, self.conn.poll())
self.assertEqual(1, len(self.conn.notifies))
self.assertEqual(pid, self.conn.notifies[0][0])
self.assertEqual('foo', self.conn.notifies[0][1])
@slow
def test_many_notifies(self):
self.autocommit(self.conn)
for name in ['foo', 'bar', 'baz']:
self.listen(name)
pids = {}
for name in ['foo', 'bar', 'baz', 'qux']:
pids[name] = int(self.notify(name).communicate()[0])
self.assertEqual(0, len(self.conn.notifies))
for i in range(10):
self.assertEqual(extensions.POLL_OK, self.conn.poll())
self.assertEqual(3, len(self.conn.notifies))
names = dict.fromkeys(['foo', 'bar', 'baz'])
for (pid, name) in self.conn.notifies:
self.assertEqual(pids[name], pid)
names.pop(name) # raise if name found twice
@slow
def test_notifies_received_on_execute(self):
self.autocommit(self.conn)
self.listen('foo')
pid = int(self.notify('foo').communicate()[0])
self.assertEqual(0, len(self.conn.notifies))
self.conn.cursor().execute('select 1;')
self.assertEqual(1, len(self.conn.notifies))
self.assertEqual(pid, self.conn.notifies[0][0])
self.assertEqual('foo', self.conn.notifies[0][1])
@slow
def test_notify_object(self):
self.autocommit(self.conn)
self.listen('foo')
self.notify('foo').communicate()
time.sleep(0.5)
self.conn.poll()
notify = self.conn.notifies[0]
self.assert_(isinstance(notify, psycopg2.extensions.Notify))
@slow
def test_notify_attributes(self):
self.autocommit(self.conn)
self.listen('foo')
pid = int(self.notify('foo').communicate()[0])
time.sleep(0.5)
self.conn.poll()
self.assertEqual(1, len(self.conn.notifies))
notify = self.conn.notifies[0]
self.assertEqual(pid, notify.pid)
self.assertEqual('foo', notify.channel)
self.assertEqual('', notify.payload)
@slow
def test_notify_payload(self):
if self.conn.info.server_version < 90000:
return self.skipTest("server version %s doesn't support notify payload"
% self.conn.info.server_version)
self.autocommit(self.conn)
self.listen('foo')
pid = int(self.notify('foo', payload="Hello, world!").communicate()[0])
time.sleep(0.5)
self.conn.poll()
self.assertEqual(1, len(self.conn.notifies))
notify = self.conn.notifies[0]
self.assertEqual(pid, notify.pid)
self.assertEqual('foo', notify.channel)
self.assertEqual('Hello, world!', notify.payload)
@slow
def test_notify_deque(self):
self.autocommit(self.conn)
self.conn.notifies = deque()
self.listen('foo')
self.notify('foo').communicate()
time.sleep(0.5)
self.conn.poll()
notify = self.conn.notifies.popleft()
self.assert_(isinstance(notify, psycopg2.extensions.Notify))
self.assertEqual(len(self.conn.notifies), 0)
@slow
def test_notify_noappend(self):
self.autocommit(self.conn)
self.conn.notifies = None
self.listen('foo')
self.notify('foo').communicate()
time.sleep(0.5)
self.conn.poll()
self.assertEqual(self.conn.notifies, None)
def test_notify_init(self):
n = psycopg2.extensions.Notify(10, 'foo')
self.assertEqual(10, n.pid)
self.assertEqual('foo', n.channel)
self.assertEqual('', n.payload)
(pid, channel) = n
self.assertEqual((pid, channel), (10, 'foo'))
n = psycopg2.extensions.Notify(42, 'bar', 'baz')
self.assertEqual(42, n.pid)
self.assertEqual('bar', n.channel)
self.assertEqual('baz', n.payload)
(pid, channel) = n
self.assertEqual((pid, channel), (42, 'bar'))
def test_compare(self):
data = [(10, 'foo'), (20, 'foo'), (10, 'foo', 'bar'), (10, 'foo', 'baz')]
for d1 in data:
for d2 in data:
n1 = psycopg2.extensions.Notify(*d1)
n2 = psycopg2.extensions.Notify(*d2)
self.assertEqual((n1 == n2), (d1 == d2))
self.assertEqual((n1 != n2), (d1 != d2))
def test_compare_tuple(self):
self.assertEqual((10, 'foo'), Notify(10, 'foo'))
self.assertEqual((10, 'foo'), Notify(10, 'foo', 'bar'))
self.assertNotEqual((10, 'foo'), Notify(20, 'foo'))
self.assertNotEqual((10, 'foo'), Notify(10, 'bar'))
def test_hash(self):
self.assertEqual(hash((10, 'foo')), hash(Notify(10, 'foo')))
self.assertNotEqual(hash(Notify(10, 'foo', 'bar')),
hash(Notify(10, 'foo')))
def test_suite():
return unittest.TestLoader().loadTestsFromName(__name__)
if __name__ == "__main__":
unittest.main()
|
