/usr/lib/python3/dist-packages/psycopg2/tests/test_connection.py is in python3-psycopg2 2.4.5-1.
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# test_connection.py - unit test for connection attributes
#
# Copyright (C) 2008-2011 James Henstridge <james@jamesh.id.au>
#
# 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 os
import time
import threading
from .testutils import unittest, decorate_all_tests
from .testutils import skip_before_postgres, skip_after_postgres
from operator import attrgetter
import psycopg2
import psycopg2.extensions
from .testconfig import dsn, dbname
class ConnectionTests(unittest.TestCase):
def setUp(self):
self.conn = psycopg2.connect(dsn)
def tearDown(self):
if not self.conn.closed:
self.conn.close()
def test_closed_attribute(self):
conn = self.conn
self.assertEqual(conn.closed, False)
conn.close()
self.assertEqual(conn.closed, True)
def test_close_idempotent(self):
conn = self.conn
conn.close()
conn.close()
self.assert_(conn.closed)
def test_cursor_closed_attribute(self):
conn = self.conn
curs = conn.cursor()
self.assertEqual(curs.closed, False)
curs.close()
self.assertEqual(curs.closed, True)
# Closing the connection closes the cursor:
curs = conn.cursor()
conn.close()
self.assertEqual(curs.closed, True)
def test_reset(self):
conn = self.conn
# switch isolation level, then reset
level = conn.isolation_level
conn.set_isolation_level(0)
self.assertEqual(conn.isolation_level, 0)
conn.reset()
# now the isolation level should be equal to saved one
self.assertEqual(conn.isolation_level, level)
def test_notices(self):
conn = self.conn
cur = conn.cursor()
cur.execute("create temp table chatty (id serial primary key);")
self.assertEqual("CREATE TABLE", cur.statusmessage)
self.assert_(conn.notices)
def test_notices_consistent_order(self):
conn = self.conn
cur = conn.cursor()
cur.execute("create temp table table1 (id serial); create temp table table2 (id serial);")
cur.execute("create temp table table3 (id serial); create temp table table4 (id serial);")
self.assertEqual(4, len(conn.notices))
self.assert_('table1' in conn.notices[0])
self.assert_('table2' in conn.notices[1])
self.assert_('table3' in conn.notices[2])
self.assert_('table4' in conn.notices[3])
def test_notices_limited(self):
conn = self.conn
cur = conn.cursor()
for i in range(0, 100, 10):
sql = " ".join(["create temp table table%d (id serial);" % j for j in range(i, i+10)])
cur.execute(sql)
self.assertEqual(50, len(conn.notices))
self.assert_('table50' in conn.notices[0], conn.notices[0])
self.assert_('table51' in conn.notices[1], conn.notices[1])
self.assert_('table98' in conn.notices[-2], conn.notices[-2])
self.assert_('table99' in conn.notices[-1], conn.notices[-1])
def test_server_version(self):
self.assert_(self.conn.server_version)
def test_protocol_version(self):
self.assert_(self.conn.protocol_version in (2,3),
self.conn.protocol_version)
def test_tpc_unsupported(self):
cnn = self.conn
if cnn.server_version >= 80100:
return self.skipTest("tpc is supported")
self.assertRaises(psycopg2.NotSupportedError,
cnn.xid, 42, "foo", "bar")
@skip_before_postgres(8, 2)
def test_concurrent_execution(self):
def slave():
cnn = psycopg2.connect(dsn)
cur = cnn.cursor()
cur.execute("select pg_sleep(4)")
cur.close()
cnn.close()
t1 = threading.Thread(target=slave)
t2 = threading.Thread(target=slave)
t0 = time.time()
t1.start()
t2.start()
t1.join()
t2.join()
self.assert_(time.time() - t0 < 7,
"something broken in concurrency")
def test_encoding_name(self):
self.conn.set_client_encoding("EUC_JP")
# conn.encoding is 'EUCJP' now.
cur = self.conn.cursor()
psycopg2.extensions.register_type(psycopg2.extensions.UNICODE, cur)
cur.execute("select 'foo'::text;")
self.assertEqual(cur.fetchone()[0], 'foo')
def test_connect_nonnormal_envvar(self):
# We must perform encoding normalization at connection time
self.conn.close()
oldenc = os.environ.get('PGCLIENTENCODING')
os.environ['PGCLIENTENCODING'] = 'utf-8' # malformed spelling
try:
self.conn = psycopg2.connect(dsn)
finally:
if oldenc is not None:
os.environ['PGCLIENTENCODING'] = oldenc
else:
del os.environ['PGCLIENTENCODING']
def test_weakref(self):
from weakref import ref
import gc
conn = psycopg2.connect(dsn)
w = ref(conn)
conn.close()
del conn
gc.collect()
self.assert_(w() is None)
def test_commit_concurrency(self):
# The problem is the one reported in ticket #103. Because of bad
# status check, we commit even when a commit is already on its way.
# We can detect this condition by the warnings.
conn = self.conn
notices = []
stop = []
def committer():
while not stop:
conn.commit()
while conn.notices:
notices.append((2, conn.notices.pop()))
cur = conn.cursor()
t1 = threading.Thread(target=committer)
t1.start()
i = 1
for i in range(1000):
cur.execute("select %s;",(i,))
conn.commit()
while conn.notices:
notices.append((1, conn.notices.pop()))
# Stop the committer thread
stop.append(True)
self.assert_(not notices, "%d notices raised" % len(notices))
class IsolationLevelsTestCase(unittest.TestCase):
def setUp(self):
self._conns = []
conn = self.connect()
cur = conn.cursor()
try:
cur.execute("drop table isolevel;")
except psycopg2.ProgrammingError:
conn.rollback()
cur.execute("create table isolevel (id integer);")
conn.commit()
conn.close()
def tearDown(self):
# close the connections used in the test
for conn in self._conns:
if not conn.closed:
conn.close()
def connect(self):
conn = psycopg2.connect(dsn)
self._conns.append(conn)
return conn
def test_isolation_level(self):
conn = self.connect()
self.assertEqual(
conn.isolation_level,
psycopg2.extensions.ISOLATION_LEVEL_READ_COMMITTED)
def test_encoding(self):
conn = self.connect()
self.assert_(conn.encoding in psycopg2.extensions.encodings)
def test_set_isolation_level(self):
conn = self.connect()
curs = conn.cursor()
levels = [
(None, psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT),
('read uncommitted', psycopg2.extensions.ISOLATION_LEVEL_READ_UNCOMMITTED),
('read committed', psycopg2.extensions.ISOLATION_LEVEL_READ_COMMITTED),
('repeatable read', psycopg2.extensions.ISOLATION_LEVEL_REPEATABLE_READ),
('serializable', psycopg2.extensions.ISOLATION_LEVEL_SERIALIZABLE),
]
for name, level in levels:
conn.set_isolation_level(level)
# the only values available on prehistoric PG versions
if conn.server_version < 80000:
if level in (
psycopg2.extensions.ISOLATION_LEVEL_READ_UNCOMMITTED,
psycopg2.extensions.ISOLATION_LEVEL_REPEATABLE_READ):
name, level = levels[levels.index((name, level)) + 1]
self.assertEqual(conn.isolation_level, level)
curs.execute('show transaction_isolation;')
got_name = curs.fetchone()[0]
if name is None:
curs.execute('show default_transaction_isolation;')
name = curs.fetchone()[0]
self.assertEqual(name, got_name)
conn.commit()
self.assertRaises(ValueError, conn.set_isolation_level, -1)
self.assertRaises(ValueError, conn.set_isolation_level, 5)
def test_set_isolation_level_abort(self):
conn = self.connect()
cur = conn.cursor()
self.assertEqual(psycopg2.extensions.TRANSACTION_STATUS_IDLE,
conn.get_transaction_status())
cur.execute("insert into isolevel values (10);")
self.assertEqual(psycopg2.extensions.TRANSACTION_STATUS_INTRANS,
conn.get_transaction_status())
conn.set_isolation_level(
psycopg2.extensions.ISOLATION_LEVEL_SERIALIZABLE)
self.assertEqual(psycopg2.extensions.TRANSACTION_STATUS_IDLE,
conn.get_transaction_status())
cur.execute("select count(*) from isolevel;")
self.assertEqual(0, cur.fetchone()[0])
cur.execute("insert into isolevel values (10);")
self.assertEqual(psycopg2.extensions.TRANSACTION_STATUS_INTRANS,
conn.get_transaction_status())
conn.set_isolation_level(
psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT)
self.assertEqual(psycopg2.extensions.TRANSACTION_STATUS_IDLE,
conn.get_transaction_status())
cur.execute("select count(*) from isolevel;")
self.assertEqual(0, cur.fetchone()[0])
cur.execute("insert into isolevel values (10);")
self.assertEqual(psycopg2.extensions.TRANSACTION_STATUS_IDLE,
conn.get_transaction_status())
conn.set_isolation_level(
psycopg2.extensions.ISOLATION_LEVEL_READ_COMMITTED)
self.assertEqual(psycopg2.extensions.TRANSACTION_STATUS_IDLE,
conn.get_transaction_status())
cur.execute("select count(*) from isolevel;")
self.assertEqual(1, cur.fetchone()[0])
def test_isolation_level_autocommit(self):
cnn1 = self.connect()
cnn2 = self.connect()
cnn2.set_isolation_level(psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT)
cur1 = cnn1.cursor()
cur1.execute("select count(*) from isolevel;")
self.assertEqual(0, cur1.fetchone()[0])
cnn1.commit()
cur2 = cnn2.cursor()
cur2.execute("insert into isolevel values (10);")
cur1.execute("select count(*) from isolevel;")
self.assertEqual(1, cur1.fetchone()[0])
def test_isolation_level_read_committed(self):
cnn1 = self.connect()
cnn2 = self.connect()
cnn2.set_isolation_level(psycopg2.extensions.ISOLATION_LEVEL_READ_COMMITTED)
cur1 = cnn1.cursor()
cur1.execute("select count(*) from isolevel;")
self.assertEqual(0, cur1.fetchone()[0])
cnn1.commit()
cur2 = cnn2.cursor()
cur2.execute("insert into isolevel values (10);")
cur1.execute("insert into isolevel values (20);")
cur2.execute("select count(*) from isolevel;")
self.assertEqual(1, cur2.fetchone()[0])
cnn1.commit()
cur2.execute("select count(*) from isolevel;")
self.assertEqual(2, cur2.fetchone()[0])
cur1.execute("select count(*) from isolevel;")
self.assertEqual(1, cur1.fetchone()[0])
cnn2.commit()
cur1.execute("select count(*) from isolevel;")
self.assertEqual(2, cur1.fetchone()[0])
def test_isolation_level_serializable(self):
cnn1 = self.connect()
cnn2 = self.connect()
cnn2.set_isolation_level(psycopg2.extensions.ISOLATION_LEVEL_SERIALIZABLE)
cur1 = cnn1.cursor()
cur1.execute("select count(*) from isolevel;")
self.assertEqual(0, cur1.fetchone()[0])
cnn1.commit()
cur2 = cnn2.cursor()
cur2.execute("insert into isolevel values (10);")
cur1.execute("insert into isolevel values (20);")
cur2.execute("select count(*) from isolevel;")
self.assertEqual(1, cur2.fetchone()[0])
cnn1.commit()
cur2.execute("select count(*) from isolevel;")
self.assertEqual(1, cur2.fetchone()[0])
cur1.execute("select count(*) from isolevel;")
self.assertEqual(1, cur1.fetchone()[0])
cnn2.commit()
cur1.execute("select count(*) from isolevel;")
self.assertEqual(2, cur1.fetchone()[0])
cur2.execute("select count(*) from isolevel;")
self.assertEqual(2, cur2.fetchone()[0])
def test_isolation_level_closed(self):
cnn = self.connect()
cnn.close()
self.assertRaises(psycopg2.InterfaceError, getattr,
cnn, 'isolation_level')
self.assertRaises(psycopg2.InterfaceError,
cnn.set_isolation_level, 0)
self.assertRaises(psycopg2.InterfaceError,
cnn.set_isolation_level, 1)
class ConnectionTwoPhaseTests(unittest.TestCase):
def setUp(self):
self._conns = []
self.make_test_table()
self.clear_test_xacts()
def tearDown(self):
self.clear_test_xacts()
# close the connections used in the test
for conn in self._conns:
if not conn.closed:
conn.close()
def clear_test_xacts(self):
"""Rollback all the prepared transaction in the testing db."""
cnn = self.connect()
cnn.set_isolation_level(0)
cur = cnn.cursor()
try:
cur.execute(
"select gid from pg_prepared_xacts where database = %s",
(dbname,))
except psycopg2.ProgrammingError:
cnn.rollback()
cnn.close()
return
gids = [ r[0] for r in cur ]
for gid in gids:
cur.execute("rollback prepared %s;", (gid,))
cnn.close()
def make_test_table(self):
cnn = self.connect()
cur = cnn.cursor()
try:
cur.execute("DROP TABLE test_tpc;")
except psycopg2.ProgrammingError:
cnn.rollback()
cur.execute("CREATE TABLE test_tpc (data text);")
cnn.commit()
cnn.close()
def count_xacts(self):
"""Return the number of prepared xacts currently in the test db."""
cnn = self.connect()
cur = cnn.cursor()
cur.execute("""
select count(*) from pg_prepared_xacts
where database = %s;""",
(dbname,))
rv = cur.fetchone()[0]
cnn.close()
return rv
def count_test_records(self):
"""Return the number of records in the test table."""
cnn = self.connect()
cur = cnn.cursor()
cur.execute("select count(*) from test_tpc;")
rv = cur.fetchone()[0]
cnn.close()
return rv
def connect(self):
conn = psycopg2.connect(dsn)
self._conns.append(conn)
return conn
def test_tpc_commit(self):
cnn = self.connect()
xid = cnn.xid(1, "gtrid", "bqual")
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
cnn.tpc_begin(xid)
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_BEGIN)
cur = cnn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_commit');")
self.assertEqual(0, self.count_xacts())
self.assertEqual(0, self.count_test_records())
cnn.tpc_prepare()
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_PREPARED)
self.assertEqual(1, self.count_xacts())
self.assertEqual(0, self.count_test_records())
cnn.tpc_commit()
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(0, self.count_xacts())
self.assertEqual(1, self.count_test_records())
def test_tpc_commit_one_phase(self):
cnn = self.connect()
xid = cnn.xid(1, "gtrid", "bqual")
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
cnn.tpc_begin(xid)
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_BEGIN)
cur = cnn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_commit_1p');")
self.assertEqual(0, self.count_xacts())
self.assertEqual(0, self.count_test_records())
cnn.tpc_commit()
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(0, self.count_xacts())
self.assertEqual(1, self.count_test_records())
def test_tpc_commit_recovered(self):
cnn = self.connect()
xid = cnn.xid(1, "gtrid", "bqual")
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
cnn.tpc_begin(xid)
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_BEGIN)
cur = cnn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_commit_rec');")
self.assertEqual(0, self.count_xacts())
self.assertEqual(0, self.count_test_records())
cnn.tpc_prepare()
cnn.close()
self.assertEqual(1, self.count_xacts())
self.assertEqual(0, self.count_test_records())
cnn = self.connect()
xid = cnn.xid(1, "gtrid", "bqual")
cnn.tpc_commit(xid)
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(0, self.count_xacts())
self.assertEqual(1, self.count_test_records())
def test_tpc_rollback(self):
cnn = self.connect()
xid = cnn.xid(1, "gtrid", "bqual")
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
cnn.tpc_begin(xid)
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_BEGIN)
cur = cnn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_rollback');")
self.assertEqual(0, self.count_xacts())
self.assertEqual(0, self.count_test_records())
cnn.tpc_prepare()
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_PREPARED)
self.assertEqual(1, self.count_xacts())
self.assertEqual(0, self.count_test_records())
cnn.tpc_rollback()
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(0, self.count_xacts())
self.assertEqual(0, self.count_test_records())
def test_tpc_rollback_one_phase(self):
cnn = self.connect()
xid = cnn.xid(1, "gtrid", "bqual")
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
cnn.tpc_begin(xid)
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_BEGIN)
cur = cnn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_rollback_1p');")
self.assertEqual(0, self.count_xacts())
self.assertEqual(0, self.count_test_records())
cnn.tpc_rollback()
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(0, self.count_xacts())
self.assertEqual(0, self.count_test_records())
def test_tpc_rollback_recovered(self):
cnn = self.connect()
xid = cnn.xid(1, "gtrid", "bqual")
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
cnn.tpc_begin(xid)
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_BEGIN)
cur = cnn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_commit_rec');")
self.assertEqual(0, self.count_xacts())
self.assertEqual(0, self.count_test_records())
cnn.tpc_prepare()
cnn.close()
self.assertEqual(1, self.count_xacts())
self.assertEqual(0, self.count_test_records())
cnn = self.connect()
xid = cnn.xid(1, "gtrid", "bqual")
cnn.tpc_rollback(xid)
self.assertEqual(cnn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(0, self.count_xacts())
self.assertEqual(0, self.count_test_records())
def test_status_after_recover(self):
cnn = self.connect()
self.assertEqual(psycopg2.extensions.STATUS_READY, cnn.status)
xns = cnn.tpc_recover()
self.assertEqual(psycopg2.extensions.STATUS_READY, cnn.status)
cur = cnn.cursor()
cur.execute("select 1")
self.assertEqual(psycopg2.extensions.STATUS_BEGIN, cnn.status)
xns = cnn.tpc_recover()
self.assertEqual(psycopg2.extensions.STATUS_BEGIN, cnn.status)
def test_recovered_xids(self):
# insert a few test xns
cnn = self.connect()
cnn.set_isolation_level(0)
cur = cnn.cursor()
cur.execute("begin; prepare transaction '1-foo';")
cur.execute("begin; prepare transaction '2-bar';")
# read the values to return
cur.execute("""
select gid, prepared, owner, database
from pg_prepared_xacts
where database = %s;""",
(dbname,))
okvals = cur.fetchall()
okvals.sort()
cnn = self.connect()
xids = cnn.tpc_recover()
xids = [ xid for xid in xids if xid.database == dbname ]
xids.sort(key=attrgetter('gtrid'))
# check the values returned
self.assertEqual(len(okvals), len(xids))
for (xid, (gid, prepared, owner, database)) in zip (xids, okvals):
self.assertEqual(xid.gtrid, gid)
self.assertEqual(xid.prepared, prepared)
self.assertEqual(xid.owner, owner)
self.assertEqual(xid.database, database)
def test_xid_encoding(self):
cnn = self.connect()
xid = cnn.xid(42, "gtrid", "bqual")
cnn.tpc_begin(xid)
cnn.tpc_prepare()
cnn = self.connect()
cur = cnn.cursor()
cur.execute("select gid from pg_prepared_xacts where database = %s;",
(dbname,))
self.assertEqual('42_Z3RyaWQ=_YnF1YWw=', cur.fetchone()[0])
def test_xid_roundtrip(self):
for fid, gtrid, bqual in [
(0, "", ""),
(42, "gtrid", "bqual"),
(0x7fffffff, "x" * 64, "y" * 64),
]:
cnn = self.connect()
xid = cnn.xid(fid, gtrid, bqual)
cnn.tpc_begin(xid)
cnn.tpc_prepare()
cnn.close()
cnn = self.connect()
xids = [ xid for xid in cnn.tpc_recover()
if xid.database == dbname ]
self.assertEqual(1, len(xids))
xid = xids[0]
self.assertEqual(xid.format_id, fid)
self.assertEqual(xid.gtrid, gtrid)
self.assertEqual(xid.bqual, bqual)
cnn.tpc_rollback(xid)
def test_unparsed_roundtrip(self):
for tid in [
'',
'hello, world!',
'x' * 199, # PostgreSQL's limit in transaction id length
]:
cnn = self.connect()
cnn.tpc_begin(tid)
cnn.tpc_prepare()
cnn.close()
cnn = self.connect()
xids = [ xid for xid in cnn.tpc_recover()
if xid.database == dbname ]
self.assertEqual(1, len(xids))
xid = xids[0]
self.assertEqual(xid.format_id, None)
self.assertEqual(xid.gtrid, tid)
self.assertEqual(xid.bqual, None)
cnn.tpc_rollback(xid)
def test_xid_construction(self):
from psycopg2.extensions import Xid
x1 = Xid(74, 'foo', 'bar')
self.assertEqual(74, x1.format_id)
self.assertEqual('foo', x1.gtrid)
self.assertEqual('bar', x1.bqual)
def test_xid_from_string(self):
from psycopg2.extensions import Xid
x2 = Xid.from_string('42_Z3RyaWQ=_YnF1YWw=')
self.assertEqual(42, x2.format_id)
self.assertEqual('gtrid', x2.gtrid)
self.assertEqual('bqual', x2.bqual)
x3 = Xid.from_string('99_xxx_yyy')
self.assertEqual(None, x3.format_id)
self.assertEqual('99_xxx_yyy', x3.gtrid)
self.assertEqual(None, x3.bqual)
def test_xid_to_string(self):
from psycopg2.extensions import Xid
x1 = Xid.from_string('42_Z3RyaWQ=_YnF1YWw=')
self.assertEqual(str(x1), '42_Z3RyaWQ=_YnF1YWw=')
x2 = Xid.from_string('99_xxx_yyy')
self.assertEqual(str(x2), '99_xxx_yyy')
def test_xid_unicode(self):
cnn = self.connect()
x1 = cnn.xid(10, 'uni', 'code')
cnn.tpc_begin(x1)
cnn.tpc_prepare()
cnn.reset()
xid = [ xid for xid in cnn.tpc_recover()
if xid.database == dbname ][0]
self.assertEqual(10, xid.format_id)
self.assertEqual('uni', xid.gtrid)
self.assertEqual('code', xid.bqual)
def test_xid_unicode_unparsed(self):
# We don't expect people shooting snowmen as transaction ids,
# so if something explodes in an encode error I don't mind.
# Let's just check uniconde is accepted as type.
cnn = self.connect()
cnn.set_client_encoding('utf8')
cnn.tpc_begin("transaction-id")
cnn.tpc_prepare()
cnn.reset()
xid = [ xid for xid in cnn.tpc_recover()
if xid.database == dbname ][0]
self.assertEqual(None, xid.format_id)
self.assertEqual('transaction-id', xid.gtrid)
self.assertEqual(None, xid.bqual)
def test_cancel_fails_prepared(self):
cnn = self.connect()
cnn.tpc_begin('cancel')
cnn.tpc_prepare()
self.assertRaises(psycopg2.ProgrammingError, cnn.cancel)
from .testutils import skip_if_tpc_disabled
decorate_all_tests(ConnectionTwoPhaseTests, skip_if_tpc_disabled)
class TransactionControlTests(unittest.TestCase):
def setUp(self):
self.conn = psycopg2.connect(dsn)
def tearDown(self):
if not self.conn.closed:
self.conn.close()
def test_closed(self):
self.conn.close()
self.assertRaises(psycopg2.InterfaceError,
self.conn.set_session,
psycopg2.extensions.ISOLATION_LEVEL_SERIALIZABLE)
def test_not_in_transaction(self):
cur = self.conn.cursor()
cur.execute("select 1")
self.assertRaises(psycopg2.ProgrammingError,
self.conn.set_session,
psycopg2.extensions.ISOLATION_LEVEL_SERIALIZABLE)
def test_set_isolation_level(self):
cur = self.conn.cursor()
self.conn.set_session(
psycopg2.extensions.ISOLATION_LEVEL_SERIALIZABLE)
cur.execute("SHOW default_transaction_isolation;")
self.assertEqual(cur.fetchone()[0], 'serializable')
self.conn.rollback()
self.conn.set_session(
psycopg2.extensions.ISOLATION_LEVEL_REPEATABLE_READ)
cur.execute("SHOW default_transaction_isolation;")
if self.conn.server_version > 80000:
self.assertEqual(cur.fetchone()[0], 'repeatable read')
else:
self.assertEqual(cur.fetchone()[0], 'serializable')
self.conn.rollback()
self.conn.set_session(
isolation_level=psycopg2.extensions.ISOLATION_LEVEL_READ_COMMITTED)
cur.execute("SHOW default_transaction_isolation;")
self.assertEqual(cur.fetchone()[0], 'read committed')
self.conn.rollback()
self.conn.set_session(
isolation_level=psycopg2.extensions.ISOLATION_LEVEL_READ_UNCOMMITTED)
cur.execute("SHOW default_transaction_isolation;")
if self.conn.server_version > 80000:
self.assertEqual(cur.fetchone()[0], 'read uncommitted')
else:
self.assertEqual(cur.fetchone()[0], 'read committed')
self.conn.rollback()
def test_set_isolation_level_str(self):
cur = self.conn.cursor()
self.conn.set_session("serializable")
cur.execute("SHOW default_transaction_isolation;")
self.assertEqual(cur.fetchone()[0], 'serializable')
self.conn.rollback()
self.conn.set_session("repeatable read")
cur.execute("SHOW default_transaction_isolation;")
if self.conn.server_version > 80000:
self.assertEqual(cur.fetchone()[0], 'repeatable read')
else:
self.assertEqual(cur.fetchone()[0], 'serializable')
self.conn.rollback()
self.conn.set_session("read committed")
cur.execute("SHOW default_transaction_isolation;")
self.assertEqual(cur.fetchone()[0], 'read committed')
self.conn.rollback()
self.conn.set_session("read uncommitted")
cur.execute("SHOW default_transaction_isolation;")
if self.conn.server_version > 80000:
self.assertEqual(cur.fetchone()[0], 'read uncommitted')
else:
self.assertEqual(cur.fetchone()[0], 'read committed')
self.conn.rollback()
def test_bad_isolation_level(self):
self.assertRaises(ValueError, self.conn.set_session, 0)
self.assertRaises(ValueError, self.conn.set_session, 5)
self.assertRaises(ValueError, self.conn.set_session, 'whatever')
def test_set_read_only(self):
cur = self.conn.cursor()
self.conn.set_session(readonly=True)
cur.execute("SHOW default_transaction_read_only;")
self.assertEqual(cur.fetchone()[0], 'on')
self.conn.rollback()
cur.execute("SHOW default_transaction_read_only;")
self.assertEqual(cur.fetchone()[0], 'on')
self.conn.rollback()
cur = self.conn.cursor()
self.conn.set_session(readonly=None)
cur.execute("SHOW default_transaction_read_only;")
self.assertEqual(cur.fetchone()[0], 'on')
self.conn.rollback()
self.conn.set_session(readonly=False)
cur.execute("SHOW default_transaction_read_only;")
self.assertEqual(cur.fetchone()[0], 'off')
self.conn.rollback()
def test_set_default(self):
cur = self.conn.cursor()
cur.execute("SHOW default_transaction_isolation;")
default_isolevel = cur.fetchone()[0]
cur.execute("SHOW default_transaction_read_only;")
default_readonly = cur.fetchone()[0]
self.conn.rollback()
self.conn.set_session(isolation_level='serializable', readonly=True)
self.conn.set_session(isolation_level='default', readonly='default')
cur.execute("SHOW default_transaction_isolation;")
self.assertEqual(cur.fetchone()[0], default_isolevel)
cur.execute("SHOW default_transaction_read_only;")
self.assertEqual(cur.fetchone()[0], default_readonly)
@skip_before_postgres(9, 1)
def test_set_deferrable(self):
cur = self.conn.cursor()
self.conn.set_session(readonly=True, deferrable=True)
cur.execute("SHOW default_transaction_read_only;")
self.assertEqual(cur.fetchone()[0], 'on')
cur.execute("SHOW default_transaction_deferrable;")
self.assertEqual(cur.fetchone()[0], 'on')
self.conn.rollback()
cur.execute("SHOW default_transaction_deferrable;")
self.assertEqual(cur.fetchone()[0], 'on')
self.conn.rollback()
self.conn.set_session(deferrable=False)
cur.execute("SHOW default_transaction_read_only;")
self.assertEqual(cur.fetchone()[0], 'on')
cur.execute("SHOW default_transaction_deferrable;")
self.assertEqual(cur.fetchone()[0], 'off')
self.conn.rollback()
@skip_after_postgres(9, 1)
def test_set_deferrable_error(self):
self.assertRaises(psycopg2.ProgrammingError,
self.conn.set_session, readonly=True, deferrable=True)
class AutocommitTests(unittest.TestCase):
def setUp(self):
self.conn = psycopg2.connect(dsn)
def tearDown(self):
if not self.conn.closed:
self.conn.close()
def test_closed(self):
self.conn.close()
self.assertRaises(psycopg2.InterfaceError,
setattr, self.conn, 'autocommit', True)
# The getter doesn't have a guard. We may change this in future
# to make it consistent with other methods; meanwhile let's just check
# it doesn't explode.
try:
self.assert_(self.conn.autocommit in (True, False))
except psycopg2.InterfaceError:
pass
def test_default_no_autocommit(self):
self.assert_(not self.conn.autocommit)
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
cur = self.conn.cursor()
cur.execute('select 1;')
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_BEGIN)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_INTRANS)
self.conn.rollback()
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
def test_set_autocommit(self):
self.conn.autocommit = True
self.assert_(self.conn.autocommit)
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
cur = self.conn.cursor()
cur.execute('select 1;')
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
self.conn.autocommit = False
self.assert_(not self.conn.autocommit)
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
cur.execute('select 1;')
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_BEGIN)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_INTRANS)
def test_set_intrans_error(self):
cur = self.conn.cursor()
cur.execute('select 1;')
self.assertRaises(psycopg2.ProgrammingError,
setattr, self.conn, 'autocommit', True)
def test_set_session_autocommit(self):
self.conn.set_session(autocommit=True)
self.assert_(self.conn.autocommit)
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
cur = self.conn.cursor()
cur.execute('select 1;')
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
self.conn.set_session(autocommit=False)
self.assert_(not self.conn.autocommit)
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
cur.execute('select 1;')
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_BEGIN)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_INTRANS)
self.conn.rollback()
self.conn.set_session('serializable', readonly=True, autocommit=True)
self.assert_(self.conn.autocommit)
cur.execute('select 1;')
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
cur.execute("SHOW default_transaction_isolation;")
self.assertEqual(cur.fetchone()[0], 'serializable')
cur.execute("SHOW default_transaction_read_only;")
self.assertEqual(cur.fetchone()[0], 'on')
def test_suite():
return unittest.TestLoader().loadTestsFromName(__name__)
if __name__ == "__main__":
unittest.main()
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