mirror of
https://github.com/psycopg/psycopg2.git
synced 2024-11-25 18:33:44 +03:00
1a8e992fcc
The tests relied on Python2 relative import semantics. Python3 changed import semantics to always search sys.path by default. To import using a relative path it must have a leading dot. Forward compatible with newer Pythons. Works towards the goal of moving tests outside of the installed package. For more information, see PEP-328: https://www.python.org/dev/peps/pep-0328/
271 lines
8.7 KiB
Python
Executable File
271 lines
8.7 KiB
Python
Executable File
#!/usr/bin/env python
|
|
|
|
# test_replication.py - unit test for replication protocol
|
|
#
|
|
# Copyright (C) 2015 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.extras import (
|
|
PhysicalReplicationConnection, LogicalReplicationConnection, StopReplication)
|
|
|
|
from . import testconfig
|
|
import unittest
|
|
from .testutils import ConnectingTestCase
|
|
from .testutils import skip_before_postgres, skip_if_green
|
|
|
|
skip_repl_if_green = skip_if_green("replication not supported in green mode")
|
|
|
|
|
|
class ReplicationTestCase(ConnectingTestCase):
|
|
def setUp(self):
|
|
super(ReplicationTestCase, self).setUp()
|
|
self.slot = testconfig.repl_slot
|
|
self._slots = []
|
|
|
|
def tearDown(self):
|
|
# first close all connections, as they might keep the slot(s) active
|
|
super(ReplicationTestCase, self).tearDown()
|
|
|
|
import time
|
|
time.sleep(0.025) # sometimes the slot is still active, wait a little
|
|
|
|
if self._slots:
|
|
kill_conn = self.connect()
|
|
if kill_conn:
|
|
kill_cur = kill_conn.cursor()
|
|
for slot in self._slots:
|
|
kill_cur.execute("SELECT pg_drop_replication_slot(%s)", (slot,))
|
|
kill_conn.commit()
|
|
kill_conn.close()
|
|
|
|
def create_replication_slot(self, cur, slot_name=testconfig.repl_slot, **kwargs):
|
|
cur.create_replication_slot(slot_name, **kwargs)
|
|
self._slots.append(slot_name)
|
|
|
|
def drop_replication_slot(self, cur, slot_name=testconfig.repl_slot):
|
|
cur.drop_replication_slot(slot_name)
|
|
self._slots.remove(slot_name)
|
|
|
|
# generate some events for our replication stream
|
|
def make_replication_events(self):
|
|
conn = self.connect()
|
|
if conn is None:
|
|
return
|
|
cur = conn.cursor()
|
|
|
|
try:
|
|
cur.execute("DROP TABLE dummy1")
|
|
except psycopg2.ProgrammingError:
|
|
conn.rollback()
|
|
cur.execute(
|
|
"CREATE TABLE dummy1 AS SELECT * FROM generate_series(1, 5) AS id")
|
|
conn.commit()
|
|
|
|
|
|
class ReplicationTest(ReplicationTestCase):
|
|
@skip_before_postgres(9, 0)
|
|
def test_physical_replication_connection(self):
|
|
conn = self.repl_connect(connection_factory=PhysicalReplicationConnection)
|
|
if conn is None:
|
|
return
|
|
cur = conn.cursor()
|
|
cur.execute("IDENTIFY_SYSTEM")
|
|
cur.fetchall()
|
|
|
|
@skip_before_postgres(9, 0)
|
|
def test_datestyle(self):
|
|
if testconfig.repl_dsn is None:
|
|
return self.skipTest("replication tests disabled by default")
|
|
|
|
conn = self.repl_connect(
|
|
dsn=testconfig.repl_dsn, options='-cdatestyle=german',
|
|
connection_factory=PhysicalReplicationConnection)
|
|
if conn is None:
|
|
return
|
|
cur = conn.cursor()
|
|
cur.execute("IDENTIFY_SYSTEM")
|
|
cur.fetchall()
|
|
|
|
@skip_before_postgres(9, 4)
|
|
def test_logical_replication_connection(self):
|
|
conn = self.repl_connect(connection_factory=LogicalReplicationConnection)
|
|
if conn is None:
|
|
return
|
|
cur = conn.cursor()
|
|
cur.execute("IDENTIFY_SYSTEM")
|
|
cur.fetchall()
|
|
|
|
@skip_before_postgres(9, 4) # slots require 9.4
|
|
def test_create_replication_slot(self):
|
|
conn = self.repl_connect(connection_factory=PhysicalReplicationConnection)
|
|
if conn is None:
|
|
return
|
|
cur = conn.cursor()
|
|
|
|
self.create_replication_slot(cur)
|
|
self.assertRaises(
|
|
psycopg2.ProgrammingError, self.create_replication_slot, cur)
|
|
|
|
@skip_before_postgres(9, 4) # slots require 9.4
|
|
@skip_repl_if_green
|
|
def test_start_on_missing_replication_slot(self):
|
|
conn = self.repl_connect(connection_factory=PhysicalReplicationConnection)
|
|
if conn is None:
|
|
return
|
|
cur = conn.cursor()
|
|
|
|
self.assertRaises(psycopg2.ProgrammingError,
|
|
cur.start_replication, self.slot)
|
|
|
|
self.create_replication_slot(cur)
|
|
cur.start_replication(self.slot)
|
|
|
|
@skip_before_postgres(9, 4) # slots require 9.4
|
|
@skip_repl_if_green
|
|
def test_start_replication_expert_sql(self):
|
|
from psycopg2 import sql
|
|
conn = self.repl_connect(connection_factory=LogicalReplicationConnection)
|
|
if conn is None:
|
|
return
|
|
cur = conn.cursor()
|
|
|
|
self.create_replication_slot(cur, output_plugin='test_decoding')
|
|
cur.start_replication_expert(
|
|
sql.SQL("START_REPLICATION SLOT {slot} LOGICAL 0/00000000").format(
|
|
slot=sql.Identifier(self.slot)))
|
|
|
|
@skip_before_postgres(9, 4) # slots require 9.4
|
|
@skip_repl_if_green
|
|
def test_start_and_recover_from_error(self):
|
|
conn = self.repl_connect(connection_factory=LogicalReplicationConnection)
|
|
if conn is None:
|
|
return
|
|
cur = conn.cursor()
|
|
|
|
self.create_replication_slot(cur, output_plugin='test_decoding')
|
|
|
|
# try with invalid options
|
|
cur.start_replication(
|
|
slot_name=self.slot, options={'invalid_param': 'value'})
|
|
|
|
def consume(msg):
|
|
pass
|
|
# we don't see the error from the server before we try to read the data
|
|
self.assertRaises(psycopg2.DataError, cur.consume_stream, consume)
|
|
|
|
# try with correct command
|
|
cur.start_replication(slot_name=self.slot)
|
|
|
|
@skip_before_postgres(9, 4) # slots require 9.4
|
|
@skip_repl_if_green
|
|
def test_keepalive(self):
|
|
conn = self.repl_connect(connection_factory=LogicalReplicationConnection)
|
|
if conn is None:
|
|
return
|
|
|
|
cur = conn.cursor()
|
|
|
|
self.create_replication_slot(cur, output_plugin='test_decoding')
|
|
|
|
self.make_replication_events()
|
|
|
|
cur.start_replication(self.slot)
|
|
|
|
def consume(msg):
|
|
raise StopReplication()
|
|
|
|
self.assertRaises(StopReplication,
|
|
cur.consume_stream, consume, keepalive_interval=2)
|
|
|
|
conn.close()
|
|
|
|
@skip_before_postgres(9, 4) # slots require 9.4
|
|
@skip_repl_if_green
|
|
def test_stop_replication(self):
|
|
conn = self.repl_connect(connection_factory=LogicalReplicationConnection)
|
|
if conn is None:
|
|
return
|
|
cur = conn.cursor()
|
|
|
|
self.create_replication_slot(cur, output_plugin='test_decoding')
|
|
|
|
self.make_replication_events()
|
|
|
|
cur.start_replication(self.slot)
|
|
|
|
def consume(msg):
|
|
raise StopReplication()
|
|
self.assertRaises(StopReplication, cur.consume_stream, consume)
|
|
|
|
|
|
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()
|