1. Denis Bilenko
  2. gevent

Source

gevent / greentest / test__refcount.py

# Copyright (c) 2008 AG Projects
# Author: Denis Bilenko
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

"""This test checks that socket instances (not gevent.socket.socket but underlying sockets)
are not leaked by the hub.
"""
from _socket import socket
class Socket(socket):
    "Something we can have a weakref to"

import _socket
_socket.socket = Socket

from gevent import monkey; monkey.patch_all()

#import sys
import greentest
from pprint import pformat
from thread import start_new_thread
from time import sleep
import weakref
import gc

import socket
socket._realsocket = Socket


SOCKET_TIMEOUT = 0.1

def init_server():
    s = socket.socket()
    s.settimeout(SOCKET_TIMEOUT)
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    s.bind(('127.0.0.1', 0))
    s.listen(5)
    return s

def handle_request(s, raise_on_timeout):
    try:
        conn, address = s.accept()
    except socket.timeout:
        if raise_on_timeout:
            raise
        else:
            return
    #print 'handle_request - accepted'
    res = conn.recv(100)
    assert res == 'hello', `res`
    #print 'handle_request - recvd %r' % res
    res = conn.send('bye')
    #print 'handle_request - sent %r' % res
    #print 'handle_request - conn refcount: %s' % sys.getrefcount(conn)
    #conn.close()

def make_request(port):
    #print 'make_request'
    s = socket.socket()
    s.connect(('127.0.0.1', port))
    #print 'make_request - connected'
    res = s.send('hello')
    #print 'make_request - sent %s' % res
    res = s.recv(100)
    assert res == 'bye', `res`
    #print 'make_request - recvd %r' % res
    #s.close()

def run_interaction(run_client):
    s = init_server()
    start_new_thread(handle_request, (s, run_client))
    if run_client:
        port = s.getsockname()[1]
        start_new_thread(make_request, (port, ))
    sleep(0.1+SOCKET_TIMEOUT)
    #print sys.getrefcount(s._sock)
    #s.close()
    return weakref.ref(s._sock)

def run_and_check(run_client):
    w = run_interaction(run_client=run_client)
    if w():
        print pformat(gc.get_referrers(w()))
        for x in gc.get_referrers(w()):
            print pformat(x)
            for y in gc.get_referrers(x):
                print '-', pformat(y)
        raise AssertionError('server should be dead by now')

class test(greentest.TestCase):

    def test_clean_exit(self):
        run_and_check(True)
        run_and_check(True)

    def test_timeout_exit(self):
        run_and_check(False)
        run_and_check(False)

if __name__=='__main__':
    greentest.main()