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214 lines
7.3 KiB
214 lines
7.3 KiB
3 years ago
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# pysqlite2/test/transactions.py: tests transactions
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#
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# Copyright (C) 2005-2007 Gerhard Häring <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 test_dml_does_not_auto_commit_before(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 test_insert_starts_transaction(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 test_update_starts_transaction(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 test_delete_starts_transaction(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 test_replace_starts_transaction(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 test_toggle_auto_commit(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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def test_raise_timeout(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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def test_locking(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 test_rollback_cursor_consistency(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 test_drop_table(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 test_pragma(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 test_ddl_does_not_autostart_transaction(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 test_immediate_transactional_ddl(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 test_transactional_ddl(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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tests = [
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SpecialCommandTests,
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TransactionTests,
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TransactionalDDL,
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]
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return unittest.TestSuite(
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[unittest.TestLoader().loadTestsFromTestCase(t) for t in tests]
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)
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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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