#!/usr/bin/env python # test_connection.py - unit test for connection attributes # # Copyright (C) 2008-2011 James Henstridge # # 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 sys import time import threading from operator import attrgetter from StringIO import StringIO import psycopg2 import psycopg2.errorcodes import psycopg2.extensions from testutils import unittest, decorate_all_tests, skip_if_no_superuser from testutils import skip_before_postgres, skip_after_postgres, skip_before_libpq from testutils import ConnectingTestCase, skip_if_tpc_disabled from testutils import skip_if_windows from testconfig import dsn, dbname class ConnectionTests(ConnectingTestCase): 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) @skip_before_postgres(8, 4) @skip_if_no_superuser @skip_if_windows def test_cleanup_on_badconn_close(self): # ticket #148 conn = self.conn cur = conn.cursor() try: cur.execute("select pg_terminate_backend(pg_backend_pid())") except psycopg2.OperationalError, e: if e.pgcode != psycopg2.errorcodes.ADMIN_SHUTDOWN: raise except psycopg2.DatabaseError, e: # curiously when disconnected in green mode we get a DatabaseError # without pgcode. if e.pgcode is not None: raise self.assertEqual(conn.closed, 2) conn.close() self.assertEqual(conn.closed, 1) 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() if self.conn.server_version >= 90300: cur.execute("set client_min_messages=debug1") 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() if self.conn.server_version >= 90300: cur.execute("set client_min_messages=debug1") 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() if self.conn.server_version >= 90300: cur.execute("set client_min_messages=debug1") 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_('table99' in conn.notices[-1], conn.notices[-1]) def test_notices_deque(self): from collections import deque conn = self.conn self.conn.notices = deque() cur = conn.cursor() if self.conn.server_version >= 90300: cur.execute("set client_min_messages=debug1") 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(len(conn.notices), 4) self.assert_('table1' in conn.notices.popleft()) self.assert_('table2' in conn.notices.popleft()) self.assert_('table3' in conn.notices.popleft()) self.assert_('table4' in conn.notices.popleft()) self.assertEqual(len(conn.notices), 0) # not limited, but no error for i in range(0, 100, 10): sql = " ".join(["create temp table table2_%d (id serial);" % j for j in range(i, i+10)]) cur.execute(sql) self.assertEqual(len([n for n in conn.notices if 'CREATE TABLE' in n]), 100) def test_notices_noappend(self): conn = self.conn self.conn.notices = None # will make an error swallowes ok cur = conn.cursor() if self.conn.server_version >= 90300: cur.execute("set client_min_messages=debug1") cur.execute("create temp table table1 (id serial);") self.assertEqual(self.conn.notices, None) 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 = self.connect() 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], u'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 = self.connect() 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)) def test_connect_cursor_factory(self): import psycopg2.extras conn = self.connect(cursor_factory=psycopg2.extras.DictCursor) cur = conn.cursor() cur.execute("select 1 as a") self.assertEqual(cur.fetchone()['a'], 1) def test_cursor_factory(self): self.assertEqual(self.conn.cursor_factory, None) cur = self.conn.cursor() cur.execute("select 1 as a") self.assertRaises(TypeError, (lambda r: r['a']), cur.fetchone()) self.conn.cursor_factory = psycopg2.extras.DictCursor self.assertEqual(self.conn.cursor_factory, psycopg2.extras.DictCursor) cur = self.conn.cursor() cur.execute("select 1 as a") self.assertEqual(cur.fetchone()['a'], 1) self.conn.cursor_factory = None self.assertEqual(self.conn.cursor_factory, None) cur = self.conn.cursor() cur.execute("select 1 as a") self.assertRaises(TypeError, (lambda r: r['a']), cur.fetchone()) def test_cursor_factory_none(self): # issue #210 conn = self.connect() cur = conn.cursor(cursor_factory=None) self.assertEqual(type(cur), psycopg2.extensions.cursor) conn = self.connect(cursor_factory=psycopg2.extras.DictCursor) cur = conn.cursor(cursor_factory=None) self.assertEqual(type(cur), psycopg2.extras.DictCursor) def test_failed_init_status(self): class SubConnection(psycopg2.extensions.connection): def __init__(self, dsn): try: super(SubConnection, self).__init__(dsn) except Exception: pass c = SubConnection("dbname=thereisnosuchdatabasemate password=foobar") self.assert_(c.closed, "connection failed so it must be closed") self.assert_('foobar' not in c.dsn, "password was not obscured") class ParseDsnTestCase(ConnectingTestCase): def test_parse_dsn(self): from psycopg2 import ProgrammingError from psycopg2.extensions import parse_dsn self.assertEqual(parse_dsn('dbname=test user=tester password=secret'), dict(user='tester', password='secret', dbname='test'), "simple DSN parsed") self.assertRaises(ProgrammingError, parse_dsn, "dbname=test 2 user=tester password=secret") self.assertEqual(parse_dsn("dbname='test 2' user=tester password=secret"), dict(user='tester', password='secret', dbname='test 2'), "DSN with quoting parsed") # Can't really use assertRaisesRegexp() here since we need to # make sure that secret is *not* exposed in the error messgage # (and it also requires python >= 2.7). raised = False try: # unterminated quote after dbname: parse_dsn("dbname='test 2 user=tester password=secret") except ProgrammingError, e: raised = True self.assertTrue(str(e).find('secret') < 0, "DSN was not exposed in error message") except e: self.fail("unexpected error condition: " + repr(e)) self.assertTrue(raised, "ProgrammingError raised due to invalid DSN") @skip_before_libpq(9, 2) def test_parse_dsn_uri(self): from psycopg2.extensions import parse_dsn self.assertEqual(parse_dsn('postgresql://tester:secret@/test'), dict(user='tester', password='secret', dbname='test'), "valid URI dsn parsed") raised = False try: # extra '=' after port value parse_dsn(dsn='postgresql://tester:secret@/test?port=1111=x') except psycopg2.ProgrammingError, e: raised = True self.assertTrue(str(e).find('secret') < 0, "URI was not exposed in error message") except e: self.fail("unexpected error condition: " + repr(e)) self.assertTrue(raised, "ProgrammingError raised due to invalid URI") def test_unicode_value(self): from psycopg2.extensions import parse_dsn snowman = u"\u2603" d = parse_dsn('dbname=' + snowman) if sys.version_info[0] < 3: self.assertEqual(d['dbname'], snowman.encode('utf8')) else: self.assertEqual(d['dbname'], snowman) def test_unicode_key(self): from psycopg2.extensions import parse_dsn snowman = u"\u2603" self.assertRaises(psycopg2.ProgrammingError, parse_dsn, snowman + '=' + snowman) def test_bad_param(self): from psycopg2.extensions import parse_dsn self.assertRaises(TypeError, parse_dsn, None) self.assertRaises(TypeError, parse_dsn, 42) class IsolationLevelsTestCase(ConnectingTestCase): def setUp(self): ConnectingTestCase.setUp(self) 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 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(ConnectingTestCase): def setUp(self): ConnectingTestCase.setUp(self) self.make_test_table() self.clear_test_xacts() def tearDown(self): self.clear_test_xacts() ConnectingTestCase.tearDown(self) 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 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, u'uni', u'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(u"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) def test_tpc_recover_non_dbapi_connection(self): from psycopg2.extras import RealDictConnection cnn = self.connect(connection_factory=RealDictConnection) cnn.tpc_begin('dict-connection') cnn.tpc_prepare() cnn.reset() xids = cnn.tpc_recover() xid = [ xid for xid in xids if xid.database == dbname ][0] self.assertEqual(None, xid.format_id) self.assertEqual('dict-connection', xid.gtrid) self.assertEqual(None, xid.bqual) decorate_all_tests(ConnectionTwoPhaseTests, skip_if_tpc_disabled) class TransactionControlTests(ConnectingTestCase): 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(ConnectingTestCase): 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()