#!/usr/bin/env python # -*- coding: utf-8 -*- # test_async_keyword.py - test for objects using 'async' as attribute/param # # Copyright (C) 2017 Daniele Varrazzo # # 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()