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