psycopg2/tests/test_async_keyword.py
Daniele Varrazzo ce9be69615 Added async_ as an alias for async
Added in argument for psycopg2.connect() and connection.__init__, and
for the connection.async attribute.
2017-02-03 04:43:49 +00:00

218 lines
7.2 KiB
Python
Executable File

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# test_async_keyword.py - test for objects using 'async' as attribute/param
#
# Copyright (C) 2017 Daniele Varrazzo <daniele.varrazzo@gmail.com>
#
# 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 psycopg2
from psycopg2 import extras
from testconfig import dsn
from testutils import (ConnectingTestCase, unittest, skip_before_postgres,
assertDsnEqual)
from test_replication import ReplicationTestCase, skip_repl_if_green
from psycopg2.extras import LogicalReplicationConnection, StopReplication
class AsyncTests(ConnectingTestCase):
def setUp(self):
ConnectingTestCase.setUp(self)
self.sync_conn = self.conn
self.conn = self.connect(async=True)
self.wait(self.conn)
curs = self.conn.cursor()
curs.execute('''
CREATE TEMPORARY TABLE table1 (
id int PRIMARY KEY
)''')
self.wait(curs)
def test_connection_setup(self):
cur = self.conn.cursor()
sync_cur = self.sync_conn.cursor()
del cur, sync_cur
self.assert_(self.conn.async)
self.assert_(not self.sync_conn.async)
# the async connection should be in isolevel 0
self.assertEquals(self.conn.isolation_level, 0)
# check other properties to be found on the connection
self.assert_(self.conn.server_version)
self.assert_(self.conn.protocol_version in (2, 3))
self.assert_(self.conn.encoding in psycopg2.extensions.encodings)
def test_async_subclass(self):
class MyConn(psycopg2.extensions.connection):
def __init__(self, dsn, async=0):
psycopg2.extensions.connection.__init__(self, dsn, async=async)
conn = self.connect(connection_factory=MyConn, async=True)
self.assert_(isinstance(conn, MyConn))
self.assert_(conn.async)
conn.close()
def test_async_connection_error_message(self):
try:
cnn = psycopg2.connect('dbname=thisdatabasedoesntexist', async=True)
self.wait(cnn)
except psycopg2.Error, e:
self.assertNotEqual(str(e), "asynchronous connection failed",
"connection error reason lost")
else:
self.fail("no exception raised")
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()
@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)
class ConnectTestCase(unittest.TestCase):
def setUp(self):
self.args = None
def connect_stub(dsn, connection_factory=None, async=False):
self.args = (dsn, connection_factory, async)
self._connect_orig = psycopg2._connect
psycopg2._connect = connect_stub
def tearDown(self):
psycopg2._connect = self._connect_orig
def test_there_has_to_be_something(self):
self.assertRaises(TypeError, psycopg2.connect)
self.assertRaises(TypeError, psycopg2.connect,
connection_factory=lambda dsn, async=False: None)
self.assertRaises(TypeError, psycopg2.connect,
async=True)
def test_factory(self):
def f(dsn, async=False):
pass
psycopg2.connect(database='foo', host='baz', connection_factory=f)
assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
self.assertEqual(self.args[1], f)
self.assertEqual(self.args[2], False)
psycopg2.connect("dbname=foo host=baz", connection_factory=f)
assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
self.assertEqual(self.args[1], f)
self.assertEqual(self.args[2], False)
def test_async(self):
psycopg2.connect(database='foo', host='baz', async=1)
assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
self.assertEqual(self.args[1], None)
self.assert_(self.args[2])
psycopg2.connect("dbname=foo host=baz", async=True)
assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
self.assertEqual(self.args[1], None)
self.assert_(self.args[2])
class AsyncReplicationTest(ReplicationTestCase):
@skip_before_postgres(9, 4) # slots require 9.4
@skip_repl_if_green
def test_async_replication(self):
conn = self.repl_connect(
connection_factory=LogicalReplicationConnection, async=1)
if conn is None:
return
cur = conn.cursor()
self.create_replication_slot(cur, output_plugin='test_decoding')
self.wait(cur)
cur.start_replication(self.slot)
self.wait(cur)
self.make_replication_events()
self.msg_count = 0
def consume(msg):
# just check the methods
"%s: %s" % (cur.io_timestamp, repr(msg))
self.msg_count += 1
if self.msg_count > 3:
cur.send_feedback(reply=True)
raise StopReplication()
cur.send_feedback(flush_lsn=msg.data_start)
# cannot be used in asynchronous mode
self.assertRaises(psycopg2.ProgrammingError, cur.consume_stream, consume)
def process_stream():
from select import select
while True:
msg = cur.read_message()
if msg:
consume(msg)
else:
select([cur], [], [])
self.assertRaises(StopReplication, process_stream)
def test_suite():
return unittest.TestLoader().loadTestsFromName(__name__)
if __name__ == "__main__":
unittest.main()