[英]How to test loopback socket connections with python?
我想测试一个复杂的类,该类包装了socket
模块的一些方法: connect
, sendall
和recv
。 特别是,我想测试此类的recv
方法。
下面的工作示例代码显示了我如何做到这一点(为了简单testsocket
,以基本的基本形式, testsocket
将对应于复杂的包装器类):
import socket
# This is just a socket for testing purposes, binds to the loopback device
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind(("127.0.0.1", 1234))
sock.listen(5)
# This is the socket later part of the complex socket wrapper.
# It just contains calls to connect, sendall and recv
testsocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
testsocket.connect(("127.0.0.1", 1234))
testsocket.sendall("test_send")
# The testing socket connects to a client
(client, adr) = sock.accept()
print client.recv(1024)
# Now I can do the actual test: Test the receive method of the socket
# wrapped in the complex class
client.sendall("test_recv")
print testsocket.recv(1024) # <-- This is what I want to test !!
# close everything
testsocket.close()
client.close()
sock.close()
但是为了测试testsocket.recv
我需要在之前使用testsocket.sendall
。
是否可以以简单的方式(无分叉或无线程)修改此代码,以测试testsocket.recv
而不使用方法testsocket.sendall
?
使用socket.socketpair
怎么socket.socketpair
? :
import socket
client, testsocket = socket.socketpair()
client.sendall("test_recv")
print testsocket.recv(1024)
testsocket.close()
client.close()
注意仅在Unix中可用。
使用mock
import mock
testsocket = mock.Mock()
testsocket.configure_mock(**{'recv.return_value': 'test_recv'})
print testsocket.recv(1024)
您不能在同一进程/线程中运行客户端和服务器套接字,因为server.recv()
是阻塞调用
我的惯例:
import socket, threading
# Protocols supported
TCP = (0x00)
UDP = (0x01)
UDP_Multicast = (0x02)
# Client/ Server mode
CLIENT = (0x00)
SERVER = (0x01)
# Data to be sent
data = 'Test. Please Ignore'
# Server processing
def simple_processing(data):
print "messsage : ", data
def start_socket( protocol, client, processing_callback):
# switch on protocol
if protocol == TCP:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
else:
return
# switch on client
if client == SERVER:
# Server mode = listening to incoming datas
sock.bind(("127.0.0.1", 1234))
sock.listen(5)
(sock, adr) = sock.accept()
processing_callback( sock.recv(1024) ) # processing data
elif client == CLIENT:
# Client mode : connecting and sending data
sock.connect(("127.0.0.1", 1234))
sock.sendall(data)
else:
return
sock.close()
def test():
# Thread creations
server = threading.Thread( target = start_socket,
args=( TCP,
SERVER,
simple_processing, )
)
client = threading.Thread( target= start_socket,
args=( TCP,
CLIENT,
None)
)
server.start()
client.start()
# Join : wait on every thread to finish
client.join()
server.join()
if __name__ == '__main__':
# Launch the test
test()
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