test_basic.py
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test_basic.py
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	from __future__ import with_statement
	import sys
	import unittest
	import new

	from twisted.internet.error import ConnectionDone, ConnectionClosed
	from twisted.names.srvconnect import SRVConnector
	from twisted.internet import reactor

	from eventlet.api import timeout, exc_after, TimeoutError
	from eventlet.coros import event
	from eventlet import proc

	from msrplib.connect import MSRPConnectFactory, MSRPAcceptFactory, MSRPRelaySettings, ConnectBase
	from msrplib import protocol as pr
	from msrplib.trafficlog import TrafficLogger, StateLogger, hook_std_output
	from msrplib.transport import MSRPTransport

	# add tell() method to stdout (needed by TrafficLogger)
	hook_std_output()

	class NoisySRVConnector(SRVConnector):

	def pickServer(self):
	host, port = SRVConnector.pickServer(self)
	print 'Resolved _%s._%s.%s --> %s:%s' % (self.service, self.protocol, self.domain, host, port)
	return host, port

	ConnectBase.SRVConnectorClass = NoisySRVConnector

	class TimeoutEvent(event):
	timeout = 10

	def wait(self):
	with timeout(self.timeout):
	return event.wait(self)

	def _connect_msrp(local_event, remote_event, msrp, local_uri):
	full_local_path = msrp.prepare(local_uri)
	try:
	local_event.send(full_local_path)
	full_remote_path = remote_event.wait()
	result = msrp.complete(full_remote_path)
	assert isinstance(result, MSRPTransport), repr(result)
	return result
	finally:
	msrp.cleanup()

	class MSRPTransport_ZeroTimeout(MSRPTransport):
	RESPONSE_TIMEOUT = 0

	class MSRPTransport_NoResponse(MSRPTransport):
	count = 0
	def write_SEND_response(self, chunk, code, comment):
	# do send response to the first chunk, otherwise binding won't happen
	if not self.count:
	self.count += 1
	MSRPTransport.write_SEND_response(self, chunk, code, comment)


	class BasicTest(unittest.TestCase):
	server_relay = None
	client_relay = None
	client_traffic_logger = None # TrafficLogger.to_file(prefix='C ')
	client_state_logger = StateLogger(prefix='C ')
	server_traffic_logger = None # TrafficLogger.to_file(prefix='S ')
	server_state_logger = StateLogger(prefix='S ')
	PER_TEST_TIMEOUT = 30
	RESPONSE_TIMEOUT = 10
	debug = True
	use_tls = False
	server_credentials = None

	def setup_two_endpoints(self, clientMSRPTransport=MSRPTransport, serverMSRPTransport=MSRPTransport):
	server_path = TimeoutEvent()
	client_path = TimeoutEvent()

	client_uri = pr.URI(use_tls=self.use_tls)
	server_uri = pr.URI(use_tls=self.use_tls, credentials=self.server_credentials)

	def client():
	msrp = MSRPConnectFactory.new(self.client_relay,
	self.client_traffic_logger,
	state_logger=self.client_state_logger,
	MSRPTransportClass=clientMSRPTransport)
	return _connect_msrp(client_path, server_path, msrp, client_uri)

	def server():
	msrp = MSRPAcceptFactory.new(self.server_relay,
	self.server_traffic_logger,
	state_logger=self.server_state_logger,
	MSRPTransportClass=serverMSRPTransport)
	return _connect_msrp(server_path, client_path, msrp, server_uri)

	client = proc.spawn_link_exception(client)
	server = proc.spawn_link_exception(server)
	return client, server

	def setUp(self):
	self.timer = exc_after(self.PER_TEST_TIMEOUT, TimeoutError('per test timeout expired'))

	def tearDown(self):
	self.timer.cancel()
	del self.timer

	def assertHeaderEqual(self, header, chunk1, chunk2):
	self.assertEqual(chunk1.headers[header].decoded, chunk2.headers[header].decoded)

	def assertSameData(self, chunk1, chunk2):
	self.assertHeaderEqual('Content-Type', chunk1, chunk2)
	self.assertEqual(chunk1.data, chunk2.data)
	self.assertEqual(chunk1.contflag, chunk2.contflag)

	def deliver_chunk(self, msrp, chunk):
	e = event()
	msrp.send_chunk(chunk, e)
	with timeout(self.RESPONSE_TIMEOUT, TimeoutError('Did not received transaction response')):
	response = e.wait()
	return response

	# instead of the following, hook logger interface and check that there's no data on the wire
	# def assertNoIncoming(self, seconds, *connections):
	# for connection in connections:
	# with timeout(seconds, None):
	# res = connection.receive_chunk()
	# raise AssertionError('received %r' % res)
	# for connection in connections:
	# assert not connection.incoming, connection.incoming
	# assert connection.reader_job.poll() is None
	# assert connection.connected
	#
	def _make_hello(self, msrp):
	x = msrp.make_chunk(data='hello')
	x.add_header(pr.ContentTypeHeader('text/plain'))
	return x

	def _send_chunk(self, sender, receiver):
	x = self._make_hello(sender)
	response = self.deliver_chunk(sender, x)
	assert response.code == 200, response
	y = receiver.receive_chunk()
	self.assertSameData(x, y)

	def test_send_chunk(self):
	client, server = proc.waitall(self.setup_two_endpoints())
	#client = client.wait()
	#server = server.wait()
	self._send_chunk(client, server)
	self._send_chunk(server, client)
	#self.assertNoIncoming(0.1, client, server)

	def test_send_chunk_response_localtimeout(self):
	client, server = proc.waitall(self.setup_two_endpoints(clientMSRPTransport=MSRPTransport_ZeroTimeout))
	x = self._make_hello(client)
	response = self.deliver_chunk(client, x)
	assert response.code == 408, response
	y = server.receive_chunk()
	self.assertSameData(x, y)
	#self.assertNoIncoming(0.1, client, server)

	def test_close_connection__receive(self):
	client, server = proc.waitall(self.setup_two_endpoints())
	assert isinstance(client, MSRPTransport), repr(client)
	client.loseConnection()
	self.assertRaises(ConnectionDone, server.receive_chunk)
	self.assertRaises(ConnectionDone, server.send_chunk, self._make_hello(server))
	self.assertRaises(ConnectionDone, client.receive_chunk)
	self.assertRaises(ConnectionDone, client.send_chunk, self._make_hello(client))

	def test_reader_failed__receive(self):
	# if reader fails with an exception, receive_chunk and send_chunk methods
	# raise that exception
	# the other party should get ConnectionClosed
	client, server = proc.waitall(self.setup_two_endpoints())
	class MyError(Exception):
	pass
	client.reader_job.kill(MyError("Killing client's reader_job"))
	self.assertRaises(MyError, client.receive_chunk)
	self.assertRaises(MyError, client.send_chunk, self._make_hello(client))
	self.assertRaises(ConnectionClosed, server.receive_chunk)
	self.assertRaises(ConnectionClosed, server.send_chunk, self._make_hello(server))

	def test_reader_failed__send(self):
	# if reader fails with an exception, receive_chunk and send_chunk methods
	# raise that exception
	# the other party should get ConnectionClosed
	client, server = proc.waitall(self.setup_two_endpoints())
	class MyError(Exception):
	pass
	client.reader_job.kill(MyError("Killing client's reader_job"))
	self.assertRaises(MyError, client.send_chunk, self._make_hello(client))
	self.assertRaises(MyError, client.receive_chunk)
	#The following does not raise as it copies chunk into twisted's buffer
	#TODO: get rid of write buffer in eventlet.twistedutil - this may help
	#TODO: send error in the reader to the event too, use deliver_event
	#self.assertRaises(ConnectionClosed, server.send_chunk, self._make_hello(server))
	self.assertRaises(ConnectionClosed, server.receive_chunk)

	from gnutls.crypto import X509PrivateKey, X509Certificate
	from gnutls.interfaces.twisted import X509Credentials

	class BasicTestTLS(BasicTest):
	use_tls = True
	cert = X509Certificate(open('valid.crt').read())
	key = X509PrivateKey(open('valid.key').read())
	server_credentials = X509Credentials(cert, key)


	from optparse import OptionParser
	parser = OptionParser()
	parser.add_option('--domain')
	parser.add_option('--username')
	parser.add_option('--password')
	parser.add_option('--host')
	parser.add_option('--port', default=2855)
	parser.add_option('--log-client', action='store_true', default=False)
	parser.add_option('--log-server', action='store_true', default=False)
	options, _args = parser.parse_args()

	if options.log_client:
	BasicTest.client_traffic_logger = TrafficLogger.to_file(prefix='C ')
	if options.log_server:
	BasicTest.server_traffic_logger = TrafficLogger.to_file(prefix='S ')

	relays = []
	# SRV:
	if options.domain is not None:
	relays.append(MSRPRelaySettings(options.domain, options.username, options.password))
	# explicit host:
	if options.host is not None:
	assert options.domain is not None
	relays.append(MSRPRelaySettings(options.domain, options.username, options.password, options.host, options.port))

	if relays:
	print relays

	configs = []
	for relay in relays:
	configs.append({'server_relay': relay, 'client_relay': None})
	configs.append({'server_relay': relay, 'client_relay': relay})

	def get_config_name(config):
	result = []
	for name, relay in config.items():
	if relay is not None:
	x = name
	print name, relay.host
	if relay.host is None:
	x += '_srv'
	result.append(x)
	return '_'.join(result)

	def make_tests_for_other_configurations(TestClass):
	klass = TestClass.__name__
	for config in configs:
	config_name = get_config_name(config)
	klass_name = klass + '_' + config_name
	while klass_name in globals():
	klass_name += '_x'
	new_class = new.classobj(klass_name, (TestClass, ), config)
	print klass_name
	globals()[klass_name] = new_class

	make_tests_for_other_configurations(BasicTest)

	if __name__=='__main__':
	test = unittest.defaultTestLoader.loadTestsFromModule(sys.modules['__main__'])
	testRunner = unittest.TextTestRunner().run(test)

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