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#-*- coding: iso-8859-1 -*-
# pysqlite2/test/transactions.py: tests transactions
#
# Copyright (C) 2005-2007 Gerhard Häring <gh@ghaering.de>
#
# This file is part of pysqlite.
#
# This software is provided 'as-is', without any express or implied
# warranty. In no event will the authors be held liable for any damages
# arising from the use of this software.
#
# Permission is granted to anyone to use this software for any purpose,
# including commercial applications, and to alter it and redistribute it
# freely, subject to the following restrictions:
#
# 1. The origin of this software must not be misrepresented; you must not
# claim that you wrote the original software. If you use this software
# in a product, an acknowledgment in the product documentation would be
# appreciated but is not required.
# 2. Altered source versions must be plainly marked as such, and must not be
# misrepresented as being the original software.
# 3. This notice may not be removed or altered from any source distribution.
import os, unittest
import sqlite3 as sqlite
def get_db_path():
return "sqlite_testdb"
class TransactionTests(unittest.TestCase):
def setUp(self):
try:
os.remove(get_db_path())
except OSError:
pass
self.con1 = sqlite.connect(get_db_path(), timeout=0.1)
self.cur1 = self.con1.cursor()
self.con2 = sqlite.connect(get_db_path(), timeout=0.1)
self.cur2 = self.con2.cursor()
def tearDown(self):
self.cur1.close()
self.con1.close()
self.cur2.close()
self.con2.close()
try:
os.unlink(get_db_path())
except OSError:
pass
def CheckDMLDoesNotAutoCommitBefore(self):
self.cur1.execute("create table test(i)")
self.cur1.execute("insert into test(i) values (5)")
self.cur1.execute("create table test2(j)")
self.cur2.execute("select i from test")
res = self.cur2.fetchall()
self.assertEqual(len(res), 0)
def CheckInsertStartsTransaction(self):
self.cur1.execute("create table test(i)")
self.cur1.execute("insert into test(i) values (5)")
self.cur2.execute("select i from test")
res = self.cur2.fetchall()
self.assertEqual(len(res), 0)
def CheckUpdateStartsTransaction(self):
self.cur1.execute("create table test(i)")
self.cur1.execute("insert into test(i) values (5)")
self.con1.commit()
self.cur1.execute("update test set i=6")
self.cur2.execute("select i from test")
res = self.cur2.fetchone()[0]
self.assertEqual(res, 5)
def CheckDeleteStartsTransaction(self):
self.cur1.execute("create table test(i)")
self.cur1.execute("insert into test(i) values (5)")
self.con1.commit()
self.cur1.execute("delete from test")
self.cur2.execute("select i from test")
res = self.cur2.fetchall()
self.assertEqual(len(res), 1)
def CheckReplaceStartsTransaction(self):
self.cur1.execute("create table test(i)")
self.cur1.execute("insert into test(i) values (5)")
self.con1.commit()
self.cur1.execute("replace into test(i) values (6)")
self.cur2.execute("select i from test")
res = self.cur2.fetchall()
self.assertEqual(len(res), 1)
self.assertEqual(res[0][0], 5)
def CheckToggleAutoCommit(self):
self.cur1.execute("create table test(i)")
self.cur1.execute("insert into test(i) values (5)")
self.con1.isolation_level = None
self.assertEqual(self.con1.isolation_level, None)
self.cur2.execute("select i from test")
res = self.cur2.fetchall()
self.assertEqual(len(res), 1)
self.con1.isolation_level = "DEFERRED"
self.assertEqual(self.con1.isolation_level , "DEFERRED")
self.cur1.execute("insert into test(i) values (5)")
self.cur2.execute("select i from test")
res = self.cur2.fetchall()
self.assertEqual(len(res), 1)
@unittest.skipIf(sqlite.sqlite_version_info < (3, 2, 2),
'test hangs on sqlite versions older than 3.2.2')
def CheckRaiseTimeout(self):
self.cur1.execute("create table test(i)")
self.cur1.execute("insert into test(i) values (5)")
with self.assertRaises(sqlite.OperationalError):
self.cur2.execute("insert into test(i) values (5)")
@unittest.skipIf(sqlite.sqlite_version_info < (3, 2, 2),
'test hangs on sqlite versions older than 3.2.2')
def CheckLocking(self):
"""
This tests the improved concurrency with pysqlite 2.3.4. You needed
to roll back con2 before you could commit con1.
"""
self.cur1.execute("create table test(i)")
self.cur1.execute("insert into test(i) values (5)")
with self.assertRaises(sqlite.OperationalError):
self.cur2.execute("insert into test(i) values (5)")
# NO self.con2.rollback() HERE!!!
self.con1.commit()
def CheckRollbackCursorConsistency(self):
"""
Checks if cursors on the connection are set into a "reset" state
when a rollback is done on the connection.
"""
con = sqlite.connect(":memory:")
cur = con.cursor()
cur.execute("create table test(x)")
cur.execute("insert into test(x) values (5)")
cur.execute("select 1 union select 2 union select 3")
con.rollback()
with self.assertRaises(sqlite.InterfaceError):
cur.fetchall()
class SpecialCommandTests(unittest.TestCase):
def setUp(self):
self.con = sqlite.connect(":memory:")
self.cur = self.con.cursor()
def CheckDropTable(self):
self.cur.execute("create table test(i)")
self.cur.execute("insert into test(i) values (5)")
self.cur.execute("drop table test")
def CheckPragma(self):
self.cur.execute("create table test(i)")
self.cur.execute("insert into test(i) values (5)")
self.cur.execute("pragma count_changes=1")
def tearDown(self):
self.cur.close()
self.con.close()
class TransactionalDDL(unittest.TestCase):
def setUp(self):
self.con = sqlite.connect(":memory:")
def CheckDdlDoesNotAutostartTransaction(self):
# For backwards compatibility reasons, DDL statements should not
# implicitly start a transaction.
self.con.execute("create table test(i)")
self.con.rollback()
result = self.con.execute("select * from test").fetchall()
self.assertEqual(result, [])
def CheckImmediateTransactionalDDL(self):
# You can achieve transactional DDL by issuing a BEGIN
# statement manually.
self.con.execute("begin immediate")
self.con.execute("create table test(i)")
self.con.rollback()
with self.assertRaises(sqlite.OperationalError):
self.con.execute("select * from test")
def CheckTransactionalDDL(self):
# You can achieve transactional DDL by issuing a BEGIN
# statement manually.
self.con.execute("begin")
self.con.execute("create table test(i)")
self.con.rollback()
with self.assertRaises(sqlite.OperationalError):
self.con.execute("select * from test")
def tearDown(self):
self.con.close()
def suite():
default_suite = unittest.makeSuite(TransactionTests, "Check")
special_command_suite = unittest.makeSuite(SpecialCommandTests, "Check")
ddl_suite = unittest.makeSuite(TransactionalDDL, "Check")
return unittest.TestSuite((default_suite, special_command_suite, ddl_suite))
def test():
runner = unittest.TextTestRunner()
runner.run(suite())
if __name__ == "__main__":
test()
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