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import testbase
import unittest, sys, datetime
import tables
db = testbase.db
from sqlalchemy import *
class TransactionTest(testbase.PersistTest):
def setUpAll(self):
global users, metadata
metadata = MetaData()
users = Table('query_users', metadata,
Column('user_id', INT, primary_key = True),
Column('user_name', VARCHAR(20)),
)
users.create(testbase.db)
def tearDown(self):
testbase.db.connect().execute(users.delete())
def tearDownAll(self):
users.drop(testbase.db)
@testbase.unsupported('mysql')
def testrollback(self):
"""test a basic rollback"""
connection = testbase.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 testnesting(self):
connection = testbase.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(1) from query_users") == 0)
result = connection.execute("select * from query_users")
assert len(result.fetchall()) == 0
connection.close()
class AutoRollbackTest(testbase.PersistTest):
def setUpAll(self):
global metadata
metadata = MetaData()
def tearDownAll(self):
metadata.drop_all(testbase.db)
def testrollback_deadlock(self):
"""test that returning connections to the pool clears any object locks."""
conn1 = testbase.db.connect()
conn2 = testbase.db.connect()
users = Table('deadlock_users', metadata,
Column('user_id', INT, primary_key = True),
Column('user_name', VARCHAR(20)),
)
users.create(conn1)
conn1.execute("select * from deadlock_users")
conn1.close()
# without auto-rollback in the connection pool's return() logic, this deadlocks in Postgres,
# 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 TLTransactionTest(testbase.PersistTest):
def setUpAll(self):
global users, metadata, tlengine
tlengine = create_engine(testbase.db_uri, strategy='threadlocal', echo=True)
metadata = MetaData()
users = Table('query_users', metadata,
Column('user_id', INT, primary_key = True),
Column('user_name', VARCHAR(20)),
)
users.create(tlengine)
def tearDown(self):
tlengine.execute(users.delete())
def tearDownAll(self):
users.drop(tlengine)
tlengine.dispose()
@testbase.unsupported('mysql')
def testrollback(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()
@testbase.unsupported('mysql')
def testcommit(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()
@testbase.unsupported('mysql', 'sqlite')
def testnesting(self):
"""tests nesting of tranacstions"""
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(1) from query_users") == 0)
finally:
external_connection.close()
if __name__ == "__main__":
testbase.main()
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