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fcc083dc12
There is no need to import testutils.unittest instead of simply unittest. They are simple aliases. Use system unittest to be more regular, consistent as well as idiomatic with the wider Python community.
224 lines
7.2 KiB
Python
Executable File
224 lines
7.2 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 Daniele Varrazzo <daniele.varrazzo@gmail.com>
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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
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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(MyConn, self).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(MyConn, self).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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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(MyCurs, self).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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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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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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