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from sqlalchemy.testing import eq_, assert_raises, \
assert_raises_message, ne_, expect_warnings
import sys
from sqlalchemy import event
from sqlalchemy.testing.engines import testing_engine
from sqlalchemy import create_engine, MetaData, INT, VARCHAR, Sequence, \
select, Integer, String, func, text, exc
from sqlalchemy.testing.schema import Table
from sqlalchemy.testing.schema import Column
from sqlalchemy import testing
from sqlalchemy.testing import fixtures
users, metadata = None, None
class TransactionTest(fixtures.TestBase):
__backend__ = True
@classmethod
def setup_class(cls):
global users, metadata
metadata = MetaData()
users = Table('query_users', metadata,
Column('user_id', INT, primary_key=True),
Column('user_name', VARCHAR(20)),
test_needs_acid=True,
)
users.create(testing.db)
def teardown(self):
testing.db.execute(users.delete()).close()
@classmethod
def teardown_class(cls):
users.drop(testing.db)
def test_commits(self):
connection = testing.db.connect()
transaction = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
transaction.commit()
transaction = connection.begin()
connection.execute(users.insert(), user_id=2, user_name='user2')
connection.execute(users.insert(), user_id=3, user_name='user3')
transaction.commit()
transaction = connection.begin()
result = connection.execute("select * from query_users")
assert len(result.fetchall()) == 3
transaction.commit()
connection.close()
def test_rollback(self):
"""test a basic rollback"""
connection = testing.db.connect()
transaction = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
connection.execute(users.insert(), user_id=2, user_name='user2')
connection.execute(users.insert(), user_id=3, user_name='user3')
transaction.rollback()
result = connection.execute("select * from query_users")
assert len(result.fetchall()) == 0
connection.close()
def test_raise(self):
connection = testing.db.connect()
transaction = connection.begin()
try:
connection.execute(users.insert(), user_id=1, user_name='user1')
connection.execute(users.insert(), user_id=2, user_name='user2')
connection.execute(users.insert(), user_id=1, user_name='user3')
transaction.commit()
assert False
except Exception as e:
print("Exception: ", e)
transaction.rollback()
result = connection.execute("select * from query_users")
assert len(result.fetchall()) == 0
connection.close()
def test_transaction_container(self):
def go(conn, table, data):
for d in data:
conn.execute(table.insert(), d)
testing.db.transaction(go, users, [dict(user_id=1,
user_name='user1')])
eq_(testing.db.execute(users.select()).fetchall(), [(1, 'user1'
)])
assert_raises(exc.DBAPIError, testing.db.transaction, go,
users, [{'user_id': 2, 'user_name': 'user2'},
{'user_id': 1, 'user_name': 'user3'}])
eq_(testing.db.execute(users.select()).fetchall(), [(1, 'user1'
)])
def test_nested_rollback(self):
connection = testing.db.connect()
try:
transaction = connection.begin()
try:
connection.execute(users.insert(), user_id=1,
user_name='user1')
connection.execute(users.insert(), user_id=2,
user_name='user2')
connection.execute(users.insert(), user_id=3,
user_name='user3')
trans2 = connection.begin()
try:
connection.execute(users.insert(), user_id=4,
user_name='user4')
connection.execute(users.insert(), user_id=5,
user_name='user5')
raise Exception('uh oh')
trans2.commit()
except:
trans2.rollback()
raise
transaction.rollback()
except Exception as e:
transaction.rollback()
raise
except Exception as e:
try:
assert str(e) == 'uh oh' # and not "This transaction is
# inactive"
finally:
connection.close()
def test_branch_nested_rollback(self):
connection = testing.db.connect()
try:
connection.begin()
branched = connection.connect()
assert branched.in_transaction()
branched.execute(users.insert(), user_id=1, user_name='user1')
nested = branched.begin()
branched.execute(users.insert(), user_id=2, user_name='user2')
nested.rollback()
assert not connection.in_transaction()
eq_(connection.scalar("select count(*) from query_users"), 0)
finally:
connection.close()
def test_branch_autorollback(self):
connection = testing.db.connect()
try:
branched = connection.connect()
branched.execute(users.insert(), user_id=1, user_name='user1')
try:
branched.execute(users.insert(), user_id=1, user_name='user1')
except exc.DBAPIError:
pass
finally:
connection.close()
def test_branch_orig_rollback(self):
connection = testing.db.connect()
try:
branched = connection.connect()
branched.execute(users.insert(), user_id=1, user_name='user1')
nested = branched.begin()
assert branched.in_transaction()
branched.execute(users.insert(), user_id=2, user_name='user2')
nested.rollback()
eq_(connection.scalar("select count(*) from query_users"), 1)
finally:
connection.close()
def test_branch_autocommit(self):
connection = testing.db.connect()
try:
branched = connection.connect()
branched.execute(users.insert(), user_id=1, user_name='user1')
finally:
connection.close()
eq_(testing.db.scalar("select count(*) from query_users"), 1)
@testing.requires.savepoints
def test_branch_savepoint_rollback(self):
connection = testing.db.connect()
try:
trans = connection.begin()
branched = connection.connect()
assert branched.in_transaction()
branched.execute(users.insert(), user_id=1, user_name='user1')
nested = branched.begin_nested()
branched.execute(users.insert(), user_id=2, user_name='user2')
nested.rollback()
assert connection.in_transaction()
trans.commit()
eq_(connection.scalar("select count(*) from query_users"), 1)
finally:
connection.close()
@testing.requires.two_phase_transactions
def test_branch_twophase_rollback(self):
connection = testing.db.connect()
try:
branched = connection.connect()
assert not branched.in_transaction()
branched.execute(users.insert(), user_id=1, user_name='user1')
nested = branched.begin_twophase()
branched.execute(users.insert(), user_id=2, user_name='user2')
nested.rollback()
assert not connection.in_transaction()
eq_(connection.scalar("select count(*) from query_users"), 1)
finally:
connection.close()
@testing.requires.python2
@testing.requires.savepoints_w_release
def test_savepoint_release_fails_warning(self):
with testing.db.connect() as connection:
connection.begin()
with expect_warnings(
"An exception has occurred during handling of a previous "
"exception. The previous exception "
"is:.*..SQL\:.*RELEASE SAVEPOINT"
):
def go():
with connection.begin_nested() as savepoint:
connection.dialect.do_release_savepoint(
connection, savepoint._savepoint)
assert_raises_message(
exc.DBAPIError,
".*SQL\:.*ROLLBACK TO SAVEPOINT",
go
)
def test_retains_through_options(self):
connection = testing.db.connect()
try:
transaction = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
conn2 = connection.execution_options(dummy=True)
conn2.execute(users.insert(), user_id=2, user_name='user2')
transaction.rollback()
eq_(connection.scalar("select count(*) from query_users"), 0)
finally:
connection.close()
def test_nesting(self):
connection = testing.db.connect()
transaction = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
connection.execute(users.insert(), user_id=2, user_name='user2')
connection.execute(users.insert(), user_id=3, user_name='user3')
trans2 = connection.begin()
connection.execute(users.insert(), user_id=4, user_name='user4')
connection.execute(users.insert(), user_id=5, user_name='user5')
trans2.commit()
transaction.rollback()
self.assert_(connection.scalar('select count(*) from '
'query_users') == 0)
result = connection.execute('select * from query_users')
assert len(result.fetchall()) == 0
connection.close()
def test_with_interface(self):
connection = testing.db.connect()
trans = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
connection.execute(users.insert(), user_id=2, user_name='user2')
try:
connection.execute(users.insert(), user_id=2, user_name='user2.5')
except Exception as e:
trans.__exit__(*sys.exc_info())
assert not trans.is_active
self.assert_(connection.scalar('select count(*) from '
'query_users') == 0)
trans = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
trans.__exit__(None, None, None)
assert not trans.is_active
self.assert_(connection.scalar('select count(*) from '
'query_users') == 1)
connection.close()
def test_close(self):
connection = testing.db.connect()
transaction = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
connection.execute(users.insert(), user_id=2, user_name='user2')
connection.execute(users.insert(), user_id=3, user_name='user3')
trans2 = connection.begin()
connection.execute(users.insert(), user_id=4, user_name='user4')
connection.execute(users.insert(), user_id=5, user_name='user5')
assert connection.in_transaction()
trans2.close()
assert connection.in_transaction()
transaction.commit()
assert not connection.in_transaction()
self.assert_(connection.scalar('select count(*) from '
'query_users') == 5)
result = connection.execute('select * from query_users')
assert len(result.fetchall()) == 5
connection.close()
def test_close2(self):
connection = testing.db.connect()
transaction = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
connection.execute(users.insert(), user_id=2, user_name='user2')
connection.execute(users.insert(), user_id=3, user_name='user3')
trans2 = connection.begin()
connection.execute(users.insert(), user_id=4, user_name='user4')
connection.execute(users.insert(), user_id=5, user_name='user5')
assert connection.in_transaction()
trans2.close()
assert connection.in_transaction()
transaction.close()
assert not connection.in_transaction()
self.assert_(connection.scalar('select count(*) from '
'query_users') == 0)
result = connection.execute('select * from query_users')
assert len(result.fetchall()) == 0
connection.close()
@testing.requires.savepoints
def test_nested_subtransaction_rollback(self):
connection = testing.db.connect()
transaction = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
trans2 = connection.begin_nested()
connection.execute(users.insert(), user_id=2, user_name='user2')
trans2.rollback()
connection.execute(users.insert(), user_id=3, user_name='user3')
transaction.commit()
eq_(connection.execute(select([users.c.user_id]).
order_by(users.c.user_id)).fetchall(),
[(1, ), (3, )])
connection.close()
@testing.requires.savepoints
@testing.crashes('oracle+zxjdbc',
'Errors out and causes subsequent tests to '
'deadlock')
def test_nested_subtransaction_commit(self):
connection = testing.db.connect()
transaction = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
trans2 = connection.begin_nested()
connection.execute(users.insert(), user_id=2, user_name='user2')
trans2.commit()
connection.execute(users.insert(), user_id=3, user_name='user3')
transaction.commit()
eq_(connection.execute(select([users.c.user_id]).
order_by(users.c.user_id)).fetchall(),
[(1, ), (2, ), (3, )])
connection.close()
@testing.requires.savepoints
def test_rollback_to_subtransaction(self):
connection = testing.db.connect()
transaction = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
trans2 = connection.begin_nested()
connection.execute(users.insert(), user_id=2, user_name='user2')
trans3 = connection.begin()
connection.execute(users.insert(), user_id=3, user_name='user3')
trans3.rollback()
connection.execute(users.insert(), user_id=4, user_name='user4')
transaction.commit()
eq_(connection.execute(select([users.c.user_id]).
order_by(users.c.user_id)).fetchall(),
[(1, ), (4, )])
connection.close()
@testing.requires.two_phase_transactions
def test_two_phase_transaction(self):
connection = testing.db.connect()
transaction = connection.begin_twophase()
connection.execute(users.insert(), user_id=1, user_name='user1')
transaction.prepare()
transaction.commit()
transaction = connection.begin_twophase()
connection.execute(users.insert(), user_id=2, user_name='user2')
transaction.commit()
transaction.close()
transaction = connection.begin_twophase()
connection.execute(users.insert(), user_id=3, user_name='user3')
transaction.rollback()
transaction = connection.begin_twophase()
connection.execute(users.insert(), user_id=4, user_name='user4')
transaction.prepare()
transaction.rollback()
transaction.close()
eq_(connection.execute(select([users.c.user_id]).
order_by(users.c.user_id)).fetchall(),
[(1, ), (2, )])
connection.close()
# PG emergency shutdown:
# select * from pg_prepared_xacts
# ROLLBACK PREPARED '<xid>'
@testing.crashes('mysql', 'Crashing on 5.5, not worth it')
@testing.requires.skip_mysql_on_windows
@testing.requires.two_phase_transactions
@testing.requires.savepoints
def test_mixed_two_phase_transaction(self):
connection = testing.db.connect()
transaction = connection.begin_twophase()
connection.execute(users.insert(), user_id=1, user_name='user1')
transaction2 = connection.begin()
connection.execute(users.insert(), user_id=2, user_name='user2')
transaction3 = connection.begin_nested()
connection.execute(users.insert(), user_id=3, user_name='user3')
transaction4 = connection.begin()
connection.execute(users.insert(), user_id=4, user_name='user4')
transaction4.commit()
transaction3.rollback()
connection.execute(users.insert(), user_id=5, user_name='user5')
transaction2.commit()
transaction.prepare()
transaction.commit()
eq_(connection.execute(select([users.c.user_id]).
order_by(users.c.user_id)).fetchall(),
[(1, ), (2, ), (5, )])
connection.close()
@testing.requires.two_phase_transactions
@testing.requires.two_phase_recovery
def test_two_phase_recover(self):
# MySQL recovery doesn't currently seem to work correctly
# Prepared transactions disappear when connections are closed
# and even when they aren't it doesn't seem possible to use the
# recovery id.
connection = testing.db.connect()
transaction = connection.begin_twophase()
connection.execute(users.insert(), user_id=1, user_name='user1')
transaction.prepare()
connection.invalidate()
connection2 = testing.db.connect()
eq_(
connection2.execution_options(autocommit=True).
execute(select([users.c.user_id]).
order_by(users.c.user_id)).fetchall(), [])
recoverables = connection2.recover_twophase()
assert transaction.xid in recoverables
connection2.commit_prepared(transaction.xid, recover=True)
eq_(connection2.execute(select([users.c.user_id]).
order_by(users.c.user_id)).fetchall(),
[(1, )])
connection2.close()
@testing.requires.two_phase_transactions
def test_multiple_two_phase(self):
conn = testing.db.connect()
xa = conn.begin_twophase()
conn.execute(users.insert(), user_id=1, user_name='user1')
xa.prepare()
xa.commit()
xa = conn.begin_twophase()
conn.execute(users.insert(), user_id=2, user_name='user2')
xa.prepare()
xa.rollback()
xa = conn.begin_twophase()
conn.execute(users.insert(), user_id=3, user_name='user3')
xa.rollback()
xa = conn.begin_twophase()
conn.execute(users.insert(), user_id=4, user_name='user4')
xa.prepare()
xa.commit()
result = \
conn.execute(select([users.c.user_name]).
order_by(users.c.user_id))
eq_(result.fetchall(), [('user1', ), ('user4', )])
conn.close()
@testing.requires.two_phase_transactions
def test_reset_rollback_two_phase_no_rollback(self):
# test [ticket:2907], essentially that the
# TwoPhaseTransaction is given the job of "reset on return"
# so that picky backends like MySQL correctly clear out
# their state when a connection is closed without handling
# the transaction explicitly.
eng = testing_engine()
# MySQL raises if you call straight rollback() on
# a connection with an XID present
@event.listens_for(eng, "invalidate")
def conn_invalidated(dbapi_con, con_record, exception):
dbapi_con.close()
raise exception
with eng.connect() as conn:
rec = conn.connection._connection_record
raw_dbapi_con = rec.connection
xa = conn.begin_twophase()
conn.execute(users.insert(), user_id=1, user_name='user1')
assert rec.connection is raw_dbapi_con
with eng.connect() as conn:
result = \
conn.execute(select([users.c.user_name]).
order_by(users.c.user_id))
eq_(result.fetchall(), [])
class ResetAgentTest(fixtures.TestBase):
__backend__ = True
def test_begin_close(self):
with testing.db.connect() as connection:
trans = connection.begin()
assert connection.connection._reset_agent is trans
assert not trans.is_active
def test_begin_rollback(self):
with testing.db.connect() as connection:
trans = connection.begin()
assert connection.connection._reset_agent is trans
trans.rollback()
assert connection.connection._reset_agent is None
def test_begin_commit(self):
with testing.db.connect() as connection:
trans = connection.begin()
assert connection.connection._reset_agent is trans
trans.commit()
assert connection.connection._reset_agent is None
@testing.requires.savepoints
def test_begin_nested_close(self):
with testing.db.connect() as connection:
trans = connection.begin_nested()
assert connection.connection._reset_agent is trans
assert not trans.is_active
@testing.requires.savepoints
def test_begin_begin_nested_close(self):
with testing.db.connect() as connection:
trans = connection.begin()
trans2 = connection.begin_nested()
assert connection.connection._reset_agent is trans
assert trans2.is_active # was never closed
assert not trans.is_active
@testing.requires.savepoints
def test_begin_begin_nested_rollback_commit(self):
with testing.db.connect() as connection:
trans = connection.begin()
trans2 = connection.begin_nested()
assert connection.connection._reset_agent is trans
trans2.rollback()
assert connection.connection._reset_agent is trans
trans.commit()
assert connection.connection._reset_agent is None
@testing.requires.savepoints
def test_begin_begin_nested_rollback_rollback(self):
with testing.db.connect() as connection:
trans = connection.begin()
trans2 = connection.begin_nested()
assert connection.connection._reset_agent is trans
trans2.rollback()
assert connection.connection._reset_agent is trans
trans.rollback()
assert connection.connection._reset_agent is None
def test_begin_begin_rollback_rollback(self):
with testing.db.connect() as connection:
trans = connection.begin()
trans2 = connection.begin()
assert connection.connection._reset_agent is trans
trans2.rollback()
assert connection.connection._reset_agent is None
trans.rollback()
assert connection.connection._reset_agent is None
def test_begin_begin_commit_commit(self):
with testing.db.connect() as connection:
trans = connection.begin()
trans2 = connection.begin()
assert connection.connection._reset_agent is trans
trans2.commit()
assert connection.connection._reset_agent is trans
trans.commit()
assert connection.connection._reset_agent is None
@testing.requires.two_phase_transactions
def test_reset_via_agent_begin_twophase(self):
with testing.db.connect() as connection:
trans = connection.begin_twophase()
assert connection.connection._reset_agent is trans
@testing.requires.two_phase_transactions
def test_reset_via_agent_begin_twophase_commit(self):
with testing.db.connect() as connection:
trans = connection.begin_twophase()
assert connection.connection._reset_agent is trans
trans.commit()
assert connection.connection._reset_agent is None
@testing.requires.two_phase_transactions
def test_reset_via_agent_begin_twophase_rollback(self):
with testing.db.connect() as connection:
trans = connection.begin_twophase()
assert connection.connection._reset_agent is trans
trans.rollback()
assert connection.connection._reset_agent is None
class AutoRollbackTest(fixtures.TestBase):
__backend__ = True
@classmethod
def setup_class(cls):
global metadata
metadata = MetaData()
@classmethod
def teardown_class(cls):
metadata.drop_all(testing.db)
def test_rollback_deadlock(self):
"""test that returning connections to the pool clears any object
locks."""
conn1 = testing.db.connect()
conn2 = testing.db.connect()
users = Table('deadlock_users', metadata, Column('user_id',
INT, primary_key=True), Column('user_name',
VARCHAR(20)), test_needs_acid=True)
users.create(conn1)
conn1.execute('select * from deadlock_users')
conn1.close()
# without auto-rollback in the connection pool's return() logic,
# this deadlocks in PostgreSQL, because conn1 is returned to the
# pool but still has a lock on "deadlock_users". comment out the
# rollback in pool/ConnectionFairy._close() to see !
users.drop(conn2)
conn2.close()
class ExplicitAutoCommitTest(fixtures.TestBase):
"""test the 'autocommit' flag on select() and text() objects.
Requires PostgreSQL so that we may define a custom function which
modifies the database. """
__only_on__ = 'postgresql'
@classmethod
def setup_class(cls):
global metadata, foo
metadata = MetaData(testing.db)
foo = Table('foo', metadata, Column('id', Integer,
primary_key=True), Column('data', String(100)))
metadata.create_all()
testing.db.execute("create function insert_foo(varchar) "
"returns integer as 'insert into foo(data) "
"values ($1);select 1;' language sql")
def teardown(self):
foo.delete().execute().close()
@classmethod
def teardown_class(cls):
testing.db.execute('drop function insert_foo(varchar)')
metadata.drop_all()
def test_control(self):
# test that not using autocommit does not commit
conn1 = testing.db.connect()
conn2 = testing.db.connect()
conn1.execute(select([func.insert_foo('data1')]))
assert conn2.execute(select([foo.c.data])).fetchall() == []
conn1.execute(text("select insert_foo('moredata')"))
assert conn2.execute(select([foo.c.data])).fetchall() == []
trans = conn1.begin()
trans.commit()
assert conn2.execute(select([foo.c.data])).fetchall() \
== [('data1', ), ('moredata', )]
conn1.close()
conn2.close()
def test_explicit_compiled(self):
conn1 = testing.db.connect()
conn2 = testing.db.connect()
conn1.execute(select([func.insert_foo('data1'
)]).execution_options(autocommit=True))
assert conn2.execute(select([foo.c.data])).fetchall() \
== [('data1', )]
conn1.close()
conn2.close()
def test_explicit_connection(self):
conn1 = testing.db.connect()
conn2 = testing.db.connect()
conn1.execution_options(autocommit=True).\
execute(select([func.insert_foo('data1'
)]))
eq_(conn2.execute(select([foo.c.data])).fetchall(), [('data1',
)])
# connection supersedes statement
conn1.execution_options(autocommit=False).\
execute(select([func.insert_foo('data2'
)]).execution_options(autocommit=True))
eq_(conn2.execute(select([foo.c.data])).fetchall(), [('data1',
)])
# ditto
conn1.execution_options(autocommit=True).\
execute(select([func.insert_foo('data3'
)]).execution_options(autocommit=False))
eq_(conn2.execute(select([foo.c.data])).fetchall(), [('data1',
), ('data2', ), ('data3', )])
conn1.close()
conn2.close()
def test_explicit_text(self):
conn1 = testing.db.connect()
conn2 = testing.db.connect()
conn1.execute(text("select insert_foo('moredata')"
).execution_options(autocommit=True))
assert conn2.execute(select([foo.c.data])).fetchall() \
== [('moredata', )]
conn1.close()
conn2.close()
@testing.uses_deprecated(r'autocommit on select\(\) is deprecated',
r'``autocommit\(\)`` is deprecated')
def test_explicit_compiled_deprecated(self):
conn1 = testing.db.connect()
conn2 = testing.db.connect()
conn1.execute(select([func.insert_foo('data1')],
autocommit=True))
assert conn2.execute(select([foo.c.data])).fetchall() \
== [('data1', )]
conn1.execute(select([func.insert_foo('data2')]).autocommit())
assert conn2.execute(select([foo.c.data])).fetchall() \
== [('data1', ), ('data2', )]
conn1.close()
conn2.close()
@testing.uses_deprecated(r'autocommit on text\(\) is deprecated')
def test_explicit_text_deprecated(self):
conn1 = testing.db.connect()
conn2 = testing.db.connect()
conn1.execute(text("select insert_foo('moredata')",
autocommit=True))
assert conn2.execute(select([foo.c.data])).fetchall() \
== [('moredata', )]
conn1.close()
conn2.close()
def test_implicit_text(self):
conn1 = testing.db.connect()
conn2 = testing.db.connect()
conn1.execute(text("insert into foo (data) values "
"('implicitdata')"))
assert conn2.execute(select([foo.c.data])).fetchall() \
== [('implicitdata', )]
conn1.close()
conn2.close()
tlengine = None
class TLTransactionTest(fixtures.TestBase):
__requires__ = ('ad_hoc_engines', )
__backend__ = True
@classmethod
def setup_class(cls):
global users, metadata, tlengine
tlengine = testing_engine(options=dict(strategy='threadlocal'))
metadata = MetaData()
users = Table('query_users', metadata, Column('user_id', INT,
Sequence('query_users_id_seq', optional=True),
primary_key=True), Column('user_name',
VARCHAR(20)), test_needs_acid=True)
metadata.create_all(tlengine)
def teardown(self):
tlengine.execute(users.delete()).close()
@classmethod
def teardown_class(cls):
tlengine.close()
metadata.drop_all(tlengine)
tlengine.dispose()
def setup(self):
# ensure tests start with engine closed
tlengine.close()
@testing.crashes('oracle', 'TNS error of unknown origin occurs on the buildbot.')
def test_rollback_no_trans(self):
tlengine = testing_engine(options=dict(strategy="threadlocal"))
# shouldn't fail
tlengine.rollback()
tlengine.begin()
tlengine.rollback()
# shouldn't fail
tlengine.rollback()
def test_commit_no_trans(self):
tlengine = testing_engine(options=dict(strategy="threadlocal"))
# shouldn't fail
tlengine.commit()
tlengine.begin()
tlengine.rollback()
# shouldn't fail
tlengine.commit()
def test_prepare_no_trans(self):
tlengine = testing_engine(options=dict(strategy="threadlocal"))
# shouldn't fail
tlengine.prepare()
tlengine.begin()
tlengine.rollback()
# shouldn't fail
tlengine.prepare()
def test_connection_close(self):
"""test that when connections are closed for real, transactions
are rolled back and disposed."""
c = tlengine.contextual_connect()
c.begin()
assert c.in_transaction()
c.close()
assert not c.in_transaction()
def test_transaction_close(self):
c = tlengine.contextual_connect()
t = c.begin()
tlengine.execute(users.insert(), user_id=1, user_name='user1')
tlengine.execute(users.insert(), user_id=2, user_name='user2')
t2 = c.begin()
tlengine.execute(users.insert(), user_id=3, user_name='user3')
tlengine.execute(users.insert(), user_id=4, user_name='user4')
t2.close()
result = c.execute('select * from query_users')
assert len(result.fetchall()) == 4
t.close()
external_connection = tlengine.connect()
result = external_connection.execute('select * from query_users'
)
try:
assert len(result.fetchall()) == 0
finally:
c.close()
external_connection.close()
def test_rollback(self):
"""test a basic rollback"""
tlengine.begin()
tlengine.execute(users.insert(), user_id=1, user_name='user1')
tlengine.execute(users.insert(), user_id=2, user_name='user2')
tlengine.execute(users.insert(), user_id=3, user_name='user3')
tlengine.rollback()
external_connection = tlengine.connect()
result = external_connection.execute('select * from query_users'
)
try:
assert len(result.fetchall()) == 0
finally:
external_connection.close()
def test_commit(self):
"""test a basic commit"""
tlengine.begin()
tlengine.execute(users.insert(), user_id=1, user_name='user1')
tlengine.execute(users.insert(), user_id=2, user_name='user2')
tlengine.execute(users.insert(), user_id=3, user_name='user3')
tlengine.commit()
external_connection = tlengine.connect()
result = external_connection.execute('select * from query_users'
)
try:
assert len(result.fetchall()) == 3
finally:
external_connection.close()
def test_with_interface(self):
trans = tlengine.begin()
tlengine.execute(users.insert(), user_id=1, user_name='user1')
tlengine.execute(users.insert(), user_id=2, user_name='user2')
trans.commit()
trans = tlengine.begin()
tlengine.execute(users.insert(), user_id=3, user_name='user3')
trans.__exit__(Exception, "fake", None)
trans = tlengine.begin()
tlengine.execute(users.insert(), user_id=4, user_name='user4')
trans.__exit__(None, None, None)
eq_(
tlengine.execute(users.select().order_by(users.c.user_id)).fetchall(),
[
(1, 'user1'),
(2, 'user2'),
(4, 'user4'),
]
)
def test_commits(self):
connection = tlengine.connect()
assert connection.execute('select count(*) from query_users'
).scalar() == 0
connection.close()
connection = tlengine.contextual_connect()
transaction = connection.begin()
connection.execute(users.insert(), user_id=1, user_name='user1')
transaction.commit()
transaction = connection.begin()
connection.execute(users.insert(), user_id=2, user_name='user2')
connection.execute(users.insert(), user_id=3, user_name='user3')
transaction.commit()
transaction = connection.begin()
result = connection.execute('select * from query_users')
l = result.fetchall()
assert len(l) == 3, 'expected 3 got %d' % len(l)
transaction.commit()
connection.close()
def test_rollback_off_conn(self):
# test that a TLTransaction opened off a TLConnection allows
# that TLConnection to be aware of the transactional context
conn = tlengine.contextual_connect()
trans = conn.begin()
conn.execute(users.insert(), user_id=1, user_name='user1')
conn.execute(users.insert(), user_id=2, user_name='user2')
conn.execute(users.insert(), user_id=3, user_name='user3')
trans.rollback()
external_connection = tlengine.connect()
result = external_connection.execute('select * from query_users'
)
try:
assert len(result.fetchall()) == 0
finally:
conn.close()
external_connection.close()
def test_morerollback_off_conn(self):
# test that an existing TLConnection automatically takes place
# in a TLTransaction opened on a second TLConnection
conn = tlengine.contextual_connect()
conn2 = tlengine.contextual_connect()
trans = conn2.begin()
conn.execute(users.insert(), user_id=1, user_name='user1')
conn.execute(users.insert(), user_id=2, user_name='user2')
conn.execute(users.insert(), user_id=3, user_name='user3')
trans.rollback()
external_connection = tlengine.connect()
result = external_connection.execute('select * from query_users'
)
try:
assert len(result.fetchall()) == 0
finally:
conn.close()
conn2.close()
external_connection.close()
def test_commit_off_connection(self):
conn = tlengine.contextual_connect()
trans = conn.begin()
conn.execute(users.insert(), user_id=1, user_name='user1')
conn.execute(users.insert(), user_id=2, user_name='user2')
conn.execute(users.insert(), user_id=3, user_name='user3')
trans.commit()
external_connection = tlengine.connect()
result = external_connection.execute('select * from query_users'
)
try:
assert len(result.fetchall()) == 3
finally:
conn.close()
external_connection.close()
def test_nesting_rollback(self):
"""tests nesting of transactions, rollback at the end"""
external_connection = tlengine.connect()
self.assert_(external_connection.connection
is not tlengine.contextual_connect().connection)
tlengine.begin()
tlengine.execute(users.insert(), user_id=1, user_name='user1')
tlengine.execute(users.insert(), user_id=2, user_name='user2')
tlengine.execute(users.insert(), user_id=3, user_name='user3')
tlengine.begin()
tlengine.execute(users.insert(), user_id=4, user_name='user4')
tlengine.execute(users.insert(), user_id=5, user_name='user5')
tlengine.commit()
tlengine.rollback()
try:
self.assert_(external_connection.scalar(
'select count(*) from query_users'
) == 0)
finally:
external_connection.close()
def test_nesting_commit(self):
"""tests nesting of transactions, commit at the end."""
external_connection = tlengine.connect()
self.assert_(external_connection.connection
is not tlengine.contextual_connect().connection)
tlengine.begin()
tlengine.execute(users.insert(), user_id=1, user_name='user1')
tlengine.execute(users.insert(), user_id=2, user_name='user2')
tlengine.execute(users.insert(), user_id=3, user_name='user3')
tlengine.begin()
tlengine.execute(users.insert(), user_id=4, user_name='user4')
tlengine.execute(users.insert(), user_id=5, user_name='user5')
tlengine.commit()
tlengine.commit()
try:
self.assert_(external_connection.scalar(
'select count(*) from query_users'
) == 5)
finally:
external_connection.close()
def test_mixed_nesting(self):
"""tests nesting of transactions off the TLEngine directly
inside of transactions off the connection from the TLEngine"""
external_connection = tlengine.connect()
self.assert_(external_connection.connection
is not tlengine.contextual_connect().connection)
conn = tlengine.contextual_connect()
trans = conn.begin()
trans2 = conn.begin()
tlengine.execute(users.insert(), user_id=1, user_name='user1')
tlengine.execute(users.insert(), user_id=2, user_name='user2')
tlengine.execute(users.insert(), user_id=3, user_name='user3')
tlengine.begin()
tlengine.execute(users.insert(), user_id=4, user_name='user4')
tlengine.begin()
tlengine.execute(users.insert(), user_id=5, user_name='user5')
tlengine.execute(users.insert(), user_id=6, user_name='user6')
tlengine.execute(users.insert(), user_id=7, user_name='user7')
tlengine.commit()
tlengine.execute(users.insert(), user_id=8, user_name='user8')
tlengine.commit()
trans2.commit()
trans.rollback()
conn.close()
try:
self.assert_(external_connection.scalar(
'select count(*) from query_users'
) == 0)
finally:
external_connection.close()
def test_more_mixed_nesting(self):
"""tests nesting of transactions off the connection from the
TLEngine inside of transactions off the TLEngine directly."""
external_connection = tlengine.connect()
self.assert_(external_connection.connection
is not tlengine.contextual_connect().connection)
tlengine.begin()
connection = tlengine.contextual_connect()
connection.execute(users.insert(), user_id=1, user_name='user1')
tlengine.begin()
connection.execute(users.insert(), user_id=2, user_name='user2')
connection.execute(users.insert(), user_id=3, user_name='user3')
trans = connection.begin()
connection.execute(users.insert(), user_id=4, user_name='user4')
connection.execute(users.insert(), user_id=5, user_name='user5')
trans.commit()
tlengine.commit()
tlengine.rollback()
connection.close()
try:
self.assert_(external_connection.scalar(
'select count(*) from query_users'
) == 0)
finally:
external_connection.close()
@testing.requires.savepoints
def test_nested_subtransaction_rollback(self):
tlengine.begin()
tlengine.execute(users.insert(), user_id=1, user_name='user1')
tlengine.begin_nested()
tlengine.execute(users.insert(), user_id=2, user_name='user2')
tlengine.rollback()
tlengine.execute(users.insert(), user_id=3, user_name='user3')
tlengine.commit()
tlengine.close()
eq_(tlengine.execute(select([users.c.user_id]).
order_by(users.c.user_id)).fetchall(),
[(1, ), (3, )])
tlengine.close()
@testing.requires.savepoints
@testing.crashes('oracle+zxjdbc',
'Errors out and causes subsequent tests to '
'deadlock')
def test_nested_subtransaction_commit(self):
tlengine.begin()
tlengine.execute(users.insert(), user_id=1, user_name='user1')
tlengine.begin_nested()
tlengine.execute(users.insert(), user_id=2, user_name='user2')
tlengine.commit()
tlengine.execute(users.insert(), user_id=3, user_name='user3')
tlengine.commit()
tlengine.close()
eq_(tlengine.execute(select([users.c.user_id]).
order_by(users.c.user_id)).fetchall(),
[(1, ), (2, ), (3, )])
tlengine.close()
@testing.requires.savepoints
def test_rollback_to_subtransaction(self):
tlengine.begin()
tlengine.execute(users.insert(), user_id=1, user_name='user1')
tlengine.begin_nested()
tlengine.execute(users.insert(), user_id=2, user_name='user2')
tlengine.begin()
tlengine.execute(users.insert(), user_id=3, user_name='user3')
tlengine.rollback()
tlengine.rollback()
tlengine.execute(users.insert(), user_id=4, user_name='user4')
tlengine.commit()
tlengine.close()
eq_(tlengine.execute(select([users.c.user_id]).
order_by(users.c.user_id)).fetchall(),
[(1, ), (4, )])
tlengine.close()
def test_connections(self):
"""tests that contextual_connect is threadlocal"""
c1 = tlengine.contextual_connect()
c2 = tlengine.contextual_connect()
assert c1.connection is c2.connection
c2.close()
assert not c1.closed
assert not tlengine.closed
@testing.requires.independent_cursors
def test_result_closing(self):
"""tests that contextual_connect is threadlocal"""
r1 = tlengine.execute(select([1]))
r2 = tlengine.execute(select([1]))
row1 = r1.fetchone()
row2 = r2.fetchone()
r1.close()
assert r2.connection is r1.connection
assert not r2.connection.closed
assert not tlengine.closed
# close again, nothing happens since resultproxy calls close()
# only once
r1.close()
assert r2.connection is r1.connection
assert not r2.connection.closed
assert not tlengine.closed
r2.close()
assert r2.connection.closed
assert tlengine.closed
@testing.crashes('oracle+cx_oracle', 'intermittent failures on the buildbot')
def test_dispose(self):
eng = testing_engine(options=dict(strategy='threadlocal'))
result = eng.execute(select([1]))
eng.dispose()
eng.execute(select([1]))
@testing.requires.two_phase_transactions
def test_two_phase_transaction(self):
tlengine.begin_twophase()
tlengine.execute(users.insert(), user_id=1, user_name='user1')
tlengine.prepare()
tlengine.commit()
tlengine.begin_twophase()
tlengine.execute(users.insert(), user_id=2, user_name='user2')
tlengine.commit()
tlengine.begin_twophase()
tlengine.execute(users.insert(), user_id=3, user_name='user3')
tlengine.rollback()
tlengine.begin_twophase()
tlengine.execute(users.insert(), user_id=4, user_name='user4')
tlengine.prepare()
tlengine.rollback()
eq_(tlengine.execute(select([users.c.user_id]).
order_by(users.c.user_id)).fetchall(),
[(1, ), (2, )])
class IsolationLevelTest(fixtures.TestBase):
__requires__ = ('isolation_level', 'ad_hoc_engines')
__backend__ = True
def _default_isolation_level(self):
if testing.against('sqlite'):
return 'SERIALIZABLE'
elif testing.against('postgresql'):
return 'READ COMMITTED'
elif testing.against('mysql'):
return "REPEATABLE READ"
else:
assert False, "default isolation level not known"
def _non_default_isolation_level(self):
if testing.against('sqlite'):
return 'READ UNCOMMITTED'
elif testing.against('postgresql'):
return 'SERIALIZABLE'
elif testing.against('mysql'):
return "SERIALIZABLE"
else:
assert False, "non default isolation level not known"
def test_engine_param_stays(self):
eng = testing_engine()
isolation_level = eng.dialect.get_isolation_level(
eng.connect().connection)
level = self._non_default_isolation_level()
ne_(isolation_level, level)
eng = testing_engine(options=dict(isolation_level=level))
eq_(
eng.dialect.get_isolation_level(
eng.connect().connection),
level
)
# check that it stays
conn = eng.connect()
eq_(
eng.dialect.get_isolation_level(conn.connection),
level
)
conn.close()
conn = eng.connect()
eq_(
eng.dialect.get_isolation_level(conn.connection),
level
)
conn.close()
def test_default_level(self):
eng = testing_engine(options=dict())
isolation_level = eng.dialect.get_isolation_level(
eng.connect().connection)
eq_(isolation_level, self._default_isolation_level())
def test_reset_level(self):
eng = testing_engine(options=dict())
conn = eng.connect()
eq_(
eng.dialect.get_isolation_level(conn.connection),
self._default_isolation_level()
)
eng.dialect.set_isolation_level(
conn.connection, self._non_default_isolation_level()
)
eq_(
eng.dialect.get_isolation_level(conn.connection),
self._non_default_isolation_level()
)
eng.dialect.reset_isolation_level(conn.connection)
eq_(
eng.dialect.get_isolation_level(conn.connection),
self._default_isolation_level()
)
conn.close()
def test_reset_level_with_setting(self):
eng = testing_engine(
options=dict(
isolation_level=self._non_default_isolation_level()))
conn = eng.connect()
eq_(eng.dialect.get_isolation_level(conn.connection),
self._non_default_isolation_level())
eng.dialect.set_isolation_level(
conn.connection,
self._default_isolation_level())
eq_(eng.dialect.get_isolation_level(conn.connection),
self._default_isolation_level())
eng.dialect.reset_isolation_level(conn.connection)
eq_(eng.dialect.get_isolation_level(conn.connection),
self._non_default_isolation_level())
conn.close()
def test_invalid_level(self):
eng = testing_engine(options=dict(isolation_level='FOO'))
assert_raises_message(
exc.ArgumentError,
"Invalid value '%s' for isolation_level. "
"Valid isolation levels for %s are %s" %
("FOO",
eng.dialect.name, ", ".join(eng.dialect._isolation_lookup)),
eng.connect
)
def test_connection_invalidated(self):
eng = testing_engine()
conn = eng.connect()
c2 = conn.execution_options(
isolation_level=self._non_default_isolation_level())
c2.invalidate()
c2.connection
# TODO: do we want to rebuild the previous isolation?
# for now, this is current behavior so we will leave it.
eq_(c2.get_isolation_level(), self._default_isolation_level())
def test_per_connection(self):
from sqlalchemy.pool import QueuePool
eng = testing_engine(
options=dict(
poolclass=QueuePool,
pool_size=2, max_overflow=0))
c1 = eng.connect()
c1 = c1.execution_options(
isolation_level=self._non_default_isolation_level()
)
c2 = eng.connect()
eq_(
eng.dialect.get_isolation_level(c1.connection),
self._non_default_isolation_level()
)
eq_(
eng.dialect.get_isolation_level(c2.connection),
self._default_isolation_level()
)
c1.close()
c2.close()
c3 = eng.connect()
eq_(
eng.dialect.get_isolation_level(c3.connection),
self._default_isolation_level()
)
c4 = eng.connect()
eq_(
eng.dialect.get_isolation_level(c4.connection),
self._default_isolation_level()
)
c3.close()
c4.close()
def test_warning_in_transaction(self):
eng = testing_engine()
c1 = eng.connect()
with expect_warnings(
"Connection is already established with a Transaction; "
"setting isolation_level may implicitly rollback or commit "
"the existing transaction, or have no effect until next "
"transaction"
):
with c1.begin():
c1 = c1.execution_options(
isolation_level=self._non_default_isolation_level()
)
eq_(
eng.dialect.get_isolation_level(c1.connection),
self._non_default_isolation_level()
)
# stays outside of transaction
eq_(
eng.dialect.get_isolation_level(c1.connection),
self._non_default_isolation_level()
)
def test_per_statement_bzzt(self):
assert_raises_message(
exc.ArgumentError,
r"'isolation_level' execution option may only be specified "
r"on Connection.execution_options\(\), or "
r"per-engine using the isolation_level "
r"argument to create_engine\(\).",
select([1]).execution_options,
isolation_level=self._non_default_isolation_level()
)
def test_per_engine(self):
# new in 0.9
eng = create_engine(
testing.db.url,
execution_options={
'isolation_level':
self._non_default_isolation_level()}
)
conn = eng.connect()
eq_(
eng.dialect.get_isolation_level(conn.connection),
self._non_default_isolation_level()
)
def test_isolation_level_accessors_connection_default(self):
eng = create_engine(
testing.db.url
)
with eng.connect() as conn:
eq_(conn.default_isolation_level, self._default_isolation_level())
with eng.connect() as conn:
eq_(conn.get_isolation_level(), self._default_isolation_level())
def test_isolation_level_accessors_connection_option_modified(self):
eng = create_engine(
testing.db.url
)
with eng.connect() as conn:
c2 = conn.execution_options(
isolation_level=self._non_default_isolation_level())
eq_(conn.default_isolation_level, self._default_isolation_level())
eq_(conn.get_isolation_level(),
self._non_default_isolation_level())
eq_(c2.get_isolation_level(), self._non_default_isolation_level())
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