async def test_purge_not_the_beyond_min_connections(
self, event_loop, mocker, min_connections):
# Mock everything, we will be calling it by hand
get_running_loop = Mock()
call_later = Mock()
asyncio_patched = mocker.patch("emcache.connection_pool.asyncio")
asyncio_patched.get_running_loop = get_running_loop
get_running_loop.return_value.call_later = call_later
max_connections = min_connections
connection_pool = ConnectionPool("localhost", 11211, max_connections,
min_connections, 60, None,
lambda _: _, False, False, None)
# we add N min expired connections that must not be removed since they are the minimum ones
expired_connections = [Mock() for _ in range(min_connections)]
for expired_connection in expired_connections:
connection_pool._unused_connections.append(expired_connection)
connection_pool._connections_last_time_used[
expired_connection] = time.monotonic() - 61
connection_pool._total_connections = min_connections
# Run the purge
connection_pool._purge_unused_connections()
# Check that the expired has not been removed the minumum connections
for expired_connection in expired_connections:
assert expired_connection in connection_pool._unused_connections
assert expired_connection in connection_pool._connections_last_time_used
assert connection_pool.total_connections == min_connections
# test specific atributes of the metrics
assert connection_pool.metrics().cur_connections == min_connections
assert connection_pool.metrics().connections_purged == 0
async def test_purge_connections(self, event_loop, mocker):
# Mock everything, we will be calling it by hand
get_running_loop = Mock()
call_later = Mock()
asyncio_patched = mocker.patch("emcache.connection_pool.asyncio")
asyncio_patched.get_running_loop = get_running_loop
get_running_loop.return_value.call_later = call_later
connection_pool = ConnectionPool("localhost", 11211, 3, 1, 60, None,
lambda _: _, False, False, None)
# Check that the call late was done with the right parameters
call_later.assert_called_with(
60, connection_pool._purge_unused_connections)
# we add three connections by hand, with different timestamps.
none_expired_connection = Mock()
expired_connection_1 = Mock()
expired_connection_2 = Mock()
connection_pool._unused_connections.append(none_expired_connection)
connection_pool._unused_connections.append(expired_connection_1)
connection_pool._unused_connections.append(expired_connection_2)
connection_pool._connections_last_time_used[
none_expired_connection] = time.monotonic()
connection_pool._connections_last_time_used[
expired_connection_1] = time.monotonic() - 61
connection_pool._connections_last_time_used[
expired_connection_2] = time.monotonic() - 61
connection_pool._total_connections = 3
# Run the purge
connection_pool._purge_unused_connections()
# Check that only one expired connection has been removed and the none expired is still there
assert expired_connection_1 not in connection_pool._unused_connections
assert expired_connection_2 in connection_pool._unused_connections
assert none_expired_connection in connection_pool._unused_connections
assert expired_connection_1 not in connection_pool._connections_last_time_used
assert expired_connection_2 in connection_pool._connections_last_time_used
assert none_expired_connection in connection_pool._connections_last_time_used
assert connection_pool.total_connections == 2
assert connection_pool.metrics().cur_connections == 2
assert connection_pool.metrics().connections_purged == 1
# Run the purge again, which should purge the other unused connection
connection_pool._purge_unused_connections()
assert expired_connection_2 not in connection_pool._unused_connections
assert none_expired_connection in connection_pool._unused_connections
assert expired_connection_2 not in connection_pool._connections_last_time_used
assert none_expired_connection in connection_pool._connections_last_time_used
assert connection_pool.total_connections == 1
assert connection_pool.metrics().cur_connections == 1
assert connection_pool.metrics().connections_purged == 2
# Run the purge again, nothing should happen
connection_pool._purge_unused_connections()
assert none_expired_connection in connection_pool._unused_connections
assert none_expired_connection in connection_pool._connections_last_time_used
assert connection_pool.total_connections == 1