/usr/lib/python2.7/dist-packages/psycopg2/tests/test_cancel.py is in python-psycopg2 2.5.4+dfsg-1.
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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 | #!/usr/bin/env python
# -*- coding: utf-8 -*-
# test_cancel.py - unit test for query cancellation
#
# Copyright (C) 2010-2011 Jan Urbański <wulczer@wulczer.org>
#
# 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 threading
import psycopg2
import psycopg2.extensions
from psycopg2 import extras
from testconfig import dsn
from testutils import unittest, ConnectingTestCase, skip_before_postgres
class CancelTests(ConnectingTestCase):
def setUp(self):
ConnectingTestCase.setUp(self)
cur = self.conn.cursor()
cur.execute('''
CREATE TEMPORARY TABLE table1 (
id int PRIMARY KEY
)''')
self.conn.commit()
def test_empty_cancel(self):
self.conn.cancel()
@skip_before_postgres(8, 2)
def test_cancel(self):
errors = []
def neverending(conn):
cur = conn.cursor()
try:
self.assertRaises(psycopg2.extensions.QueryCanceledError,
cur.execute, "select pg_sleep(60)")
# make sure the connection still works
conn.rollback()
cur.execute("select 1")
self.assertEqual(cur.fetchall(), [(1, )])
except Exception, e:
errors.append(e)
raise
def canceller(conn):
cur = conn.cursor()
try:
conn.cancel()
except Exception, e:
errors.append(e)
raise
thread1 = threading.Thread(target=neverending, args=(self.conn, ))
# wait a bit to make sure that the other thread is already in
# pg_sleep -- ugly and racy, but the chances are ridiculously low
thread2 = threading.Timer(0.3, canceller, args=(self.conn, ))
thread1.start()
thread2.start()
thread1.join()
thread2.join()
self.assertEqual(errors, [])
@skip_before_postgres(8, 2)
def test_async_cancel(self):
async_conn = psycopg2.connect(dsn, async=True)
self.assertRaises(psycopg2.OperationalError, async_conn.cancel)
extras.wait_select(async_conn)
cur = async_conn.cursor()
cur.execute("select pg_sleep(10000)")
self.assertTrue(async_conn.isexecuting())
async_conn.cancel()
self.assertRaises(psycopg2.extensions.QueryCanceledError,
extras.wait_select, async_conn)
cur.execute("select 1")
extras.wait_select(async_conn)
self.assertEqual(cur.fetchall(), [(1, )])
def test_async_connection_cancel(self):
async_conn = psycopg2.connect(dsn, async=True)
async_conn.close()
self.assertTrue(async_conn.closed)
def test_suite():
return unittest.TestLoader().loadTestsFromName(__name__)
if __name__ == "__main__":
unittest.main()
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