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#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vi:ts=4:et
from . import localhost
import flaky
import pycurl
import unittest, signal
import time as _time
from . import appmanager
from . import util
setup_module, teardown_module = appmanager.setup(('app', 8380))
@flaky.flaky(max_runs=3)
class PauseTest(unittest.TestCase):
def setUp(self):
self.curl = util.DefaultCurl()
def tearDown(self):
self.curl.close()
def test_pause_via_call(self):
self.check_pause(True)
def test_pause_via_return(self):
self.check_pause(False)
@util.only_unix
def check_pause(self, call):
# the app sleeps for 0.5 seconds
self.curl.setopt(pycurl.URL, 'http://%s:8380/pause' % localhost)
sio = util.BytesIO()
state = dict(paused=False, resumed=False)
if call:
def writefunc(data):
rv = sio.write(data)
if not state['paused']:
self.curl.pause(pycurl.PAUSE_ALL)
state['paused'] = True
return rv
else:
def writefunc(data):
if not state['paused']:
# cannot write to sio here, because
# curl takes pause return value to mean that
# nothing was written
state['paused'] = True
return pycurl.READFUNC_PAUSE
else:
return sio.write(data)
def resume(*args):
state['resumed'] = True
self.curl.pause(pycurl.PAUSE_CONT)
signal.signal(signal.SIGALRM, resume)
# alarm for 1 second which is 0.5 seconds more than the server side
# should sleep for
signal.alarm(1)
start = _time.time()
self.curl.setopt(pycurl.WRITEFUNCTION, writefunc)
m = pycurl.CurlMulti()
m.add_handle(self.curl)
# Number of seconds to wait for a timeout to happen
SELECT_TIMEOUT = 1.0
# Stir the state machine into action
while 1:
ret, num_handles = m.perform()
if ret != pycurl.E_CALL_MULTI_PERFORM:
break
# Keep going until all the connections have terminated
while num_handles:
# The select method uses fdset internally to determine which file descriptors
# to check.
m.select(SELECT_TIMEOUT)
while 1:
if _time.time() - start > 2:
# test is taking too long, fail
assert False, 'Test is taking too long'
ret, num_handles = m.perform()
if ret != pycurl.E_CALL_MULTI_PERFORM:
break
# Cleanup
m.remove_handle(self.curl)
m.close()
self.assertEqual('part1part2', sio.getvalue().decode())
end = _time.time()
# check that client side waited
self.assertTrue(end-start > 0.9)
assert state['resumed']
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