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320 lines
10 KiB
Python
Executable File
320 lines
10 KiB
Python
Executable File
#!/usr/bin/env python
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# test_ctxman.py - unit test for connection and cursor used as context manager
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#
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# Copyright (C) 2012-2019 Daniele Varrazzo <daniele.varrazzo@gmail.com>
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# Copyright (C) 2020 The Psycopg Team
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#
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# psycopg2 is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# In addition, as a special exception, the copyright holders give
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# permission to link this program with the OpenSSL library (or with
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# modified versions of OpenSSL that use the same license as OpenSSL),
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# and distribute linked combinations including the two.
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#
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# You must obey the GNU Lesser General Public License in all respects for
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# all of the code used other than OpenSSL.
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#
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# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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# License for more details.
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import psycopg2
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import psycopg2.extensions as ext
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import unittest
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from .testutils import ConnectingTestCase, skip_before_postgres, skip_if_crdb
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class WithTestCase(ConnectingTestCase):
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def setUp(self):
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ConnectingTestCase.setUp(self)
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curs = self.conn.cursor()
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try:
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curs.execute("delete from test_with")
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self.conn.commit()
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except psycopg2.ProgrammingError:
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# assume table doesn't exist
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self.conn.rollback()
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curs.execute("create table test_with (id integer primary key)")
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self.conn.commit()
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class WithConnectionTestCase(WithTestCase):
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def test_with_ok(self):
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with self.conn as conn:
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self.assert_(self.conn is conn)
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self.assertEqual(conn.status, ext.STATUS_READY)
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curs = conn.cursor()
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curs.execute("insert into test_with values (1)")
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self.assertEqual(conn.status, ext.STATUS_BEGIN)
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self.assertEqual(self.conn.status, ext.STATUS_READY)
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self.assert_(not self.conn.closed)
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curs = self.conn.cursor()
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curs.execute("select * from test_with")
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self.assertEqual(curs.fetchall(), [(1,)])
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def test_with_connect_idiom(self):
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with self.connect() as conn:
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self.assertEqual(conn.status, ext.STATUS_READY)
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curs = conn.cursor()
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curs.execute("insert into test_with values (2)")
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self.assertEqual(conn.status, ext.STATUS_BEGIN)
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self.assertEqual(self.conn.status, ext.STATUS_READY)
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self.assert_(not self.conn.closed)
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curs = self.conn.cursor()
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curs.execute("select * from test_with")
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self.assertEqual(curs.fetchall(), [(2,)])
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def test_with_error_db(self):
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def f():
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with self.conn as conn:
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curs = conn.cursor()
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curs.execute("insert into test_with values ('a')")
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self.assertRaises(psycopg2.DataError, f)
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self.assertEqual(self.conn.status, ext.STATUS_READY)
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self.assert_(not self.conn.closed)
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curs = self.conn.cursor()
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curs.execute("select * from test_with")
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self.assertEqual(curs.fetchall(), [])
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def test_with_error_python(self):
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def f():
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with self.conn as conn:
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curs = conn.cursor()
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curs.execute("insert into test_with values (3)")
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1 / 0
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self.assertRaises(ZeroDivisionError, f)
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self.assertEqual(self.conn.status, ext.STATUS_READY)
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self.assert_(not self.conn.closed)
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curs = self.conn.cursor()
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curs.execute("select * from test_with")
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self.assertEqual(curs.fetchall(), [])
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def test_with_closed(self):
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def f():
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with self.conn:
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pass
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self.conn.close()
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self.assertRaises(psycopg2.InterfaceError, f)
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def test_subclass_commit(self):
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commits = []
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class MyConn(ext.connection):
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def commit(self):
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commits.append(None)
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super().commit()
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with self.connect(connection_factory=MyConn) as conn:
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curs = conn.cursor()
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curs.execute("insert into test_with values (10)")
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self.assertEqual(conn.status, ext.STATUS_READY)
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self.assert_(commits)
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curs = self.conn.cursor()
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curs.execute("select * from test_with")
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self.assertEqual(curs.fetchall(), [(10,)])
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def test_subclass_rollback(self):
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rollbacks = []
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class MyConn(ext.connection):
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def rollback(self):
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rollbacks.append(None)
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super().rollback()
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try:
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with self.connect(connection_factory=MyConn) as conn:
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curs = conn.cursor()
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curs.execute("insert into test_with values (11)")
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1 / 0
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except ZeroDivisionError:
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pass
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else:
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self.assert_("exception not raised")
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self.assertEqual(conn.status, ext.STATUS_READY)
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self.assert_(rollbacks)
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curs = conn.cursor()
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curs.execute("select * from test_with")
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self.assertEqual(curs.fetchall(), [])
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def test_cant_reenter(self):
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raised_ok = False
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with self.conn:
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try:
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with self.conn:
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pass
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except psycopg2.ProgrammingError:
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raised_ok = True
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self.assert_(raised_ok)
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# Still good
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with self.conn:
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pass
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def test_with_autocommit(self):
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self.conn.autocommit = True
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self.assertEqual(
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self.conn.info.transaction_status, ext.TRANSACTION_STATUS_IDLE
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)
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with self.conn:
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curs = self.conn.cursor()
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curs.execute("insert into test_with values (1)")
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self.assertEqual(
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self.conn.info.transaction_status,
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ext.TRANSACTION_STATUS_INTRANS,
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)
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self.assertEqual(
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self.conn.info.transaction_status, ext.TRANSACTION_STATUS_IDLE
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)
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curs.execute("select count(*) from test_with")
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self.assertEqual(curs.fetchone()[0], 1)
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self.assertEqual(
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self.conn.info.transaction_status, ext.TRANSACTION_STATUS_IDLE
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)
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def test_with_autocommit_pyerror(self):
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self.conn.autocommit = True
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raised_ok = False
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try:
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with self.conn:
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curs = self.conn.cursor()
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curs.execute("insert into test_with values (2)")
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self.assertEqual(
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self.conn.info.transaction_status,
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ext.TRANSACTION_STATUS_INTRANS,
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)
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1 / 0
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except ZeroDivisionError:
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raised_ok = True
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self.assert_(raised_ok)
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self.assertEqual(
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self.conn.info.transaction_status, ext.TRANSACTION_STATUS_IDLE
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)
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curs.execute("select count(*) from test_with")
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self.assertEqual(curs.fetchone()[0], 0)
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self.assertEqual(
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self.conn.info.transaction_status, ext.TRANSACTION_STATUS_IDLE
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)
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def test_with_autocommit_pgerror(self):
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self.conn.autocommit = True
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raised_ok = False
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try:
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with self.conn:
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curs = self.conn.cursor()
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curs.execute("insert into test_with values (2)")
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self.assertEqual(
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self.conn.info.transaction_status,
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ext.TRANSACTION_STATUS_INTRANS,
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)
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curs.execute("insert into test_with values ('x')")
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except psycopg2.errors.InvalidTextRepresentation:
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raised_ok = True
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self.assert_(raised_ok)
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self.assertEqual(
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self.conn.info.transaction_status, ext.TRANSACTION_STATUS_IDLE
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)
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curs.execute("select count(*) from test_with")
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self.assertEqual(curs.fetchone()[0], 0)
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self.assertEqual(
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self.conn.info.transaction_status, ext.TRANSACTION_STATUS_IDLE
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)
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class WithCursorTestCase(WithTestCase):
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def test_with_ok(self):
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with self.conn as conn:
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with conn.cursor() as curs:
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curs.execute("insert into test_with values (4)")
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self.assert_(not curs.closed)
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self.assertEqual(self.conn.status, ext.STATUS_BEGIN)
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self.assert_(curs.closed)
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self.assertEqual(self.conn.status, ext.STATUS_READY)
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self.assert_(not self.conn.closed)
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curs = self.conn.cursor()
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curs.execute("select * from test_with")
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self.assertEqual(curs.fetchall(), [(4,)])
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def test_with_error(self):
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try:
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with self.conn as conn:
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with conn.cursor() as curs:
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curs.execute("insert into test_with values (5)")
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1 / 0
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except ZeroDivisionError:
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pass
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self.assertEqual(self.conn.status, ext.STATUS_READY)
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self.assert_(not self.conn.closed)
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self.assert_(curs.closed)
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curs = self.conn.cursor()
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curs.execute("select * from test_with")
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self.assertEqual(curs.fetchall(), [])
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def test_subclass(self):
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closes = []
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class MyCurs(ext.cursor):
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def close(self):
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closes.append(None)
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super().close()
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with self.conn.cursor(cursor_factory=MyCurs) as curs:
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self.assert_(isinstance(curs, MyCurs))
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self.assert_(curs.closed)
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self.assert_(closes)
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@skip_if_crdb("named cursor")
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def test_exception_swallow(self):
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# bug #262: __exit__ calls cur.close() that hides the exception
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# with another error.
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try:
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with self.conn as conn:
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with conn.cursor('named') as cur:
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cur.execute("select 1/0")
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cur.fetchone()
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except psycopg2.DataError as e:
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self.assertEqual(e.pgcode, '22012')
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else:
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self.fail("where is my exception?")
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@skip_if_crdb("named cursor")
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@skip_before_postgres(8, 2)
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def test_named_with_noop(self):
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with self.conn.cursor('named'):
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pass
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def test_suite():
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return unittest.TestLoader().loadTestsFromName(__name__)
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if __name__ == "__main__":
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unittest.main()
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