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from sqlalchemy import pool as pool_module
from sqlalchemy.pool import QueuePool
from sqlalchemy.testing import AssertsExecutionResults
from sqlalchemy.testing import fixtures
from sqlalchemy.testing import profiling
pool = None
class QueuePoolTest(fixtures.TestBase, AssertsExecutionResults):
__requires__ = ("cpython",)
class Connection(object):
def rollback(self):
pass
def close(self):
pass
def teardown(self):
# the tests leave some fake connections
# around which don't necessarily
# get gc'ed as quickly as we'd like,
# on backends like pypy, python3.2
pool_module._refs.clear()
def setup(self):
# create a throwaway pool which
# has the effect of initializing
# class-level event listeners on Pool,
# if not present already.
p1 = QueuePool(
creator=self.Connection,
pool_size=3,
max_overflow=-1,
use_threadlocal=True,
)
p1.connect()
global pool
pool = QueuePool(
creator=self.Connection,
pool_size=3,
max_overflow=-1,
use_threadlocal=True,
)
@profiling.function_call_count()
def test_first_connect(self):
pool.connect()
def test_second_connect(self):
conn = pool.connect()
conn.close()
@profiling.function_call_count()
def go():
conn2 = pool.connect()
return conn2
go()
def test_second_samethread_connect(self):
conn = pool.connect()
conn # strong ref
@profiling.function_call_count()
def go():
return pool.connect()
go()
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