#!/usr/bin/env python

 # encoding: utf-8

 """

 BLIPConnectionTest.py

 Created by Jens Alfke on 2008-06-04.

 This source file is test/example code, and is in the public domain.

 """

 from BLIP import Connection, OutgoingRequest, kOpening

 import asyncore

 from cStringIO import StringIO

 from datetime import datetime

 import logging

 import random

 import unittest

 kSendInterval = 0.2

 kNBatchedMessages = 10

 kUrgentEvery = 4

 def randbool():

     return random.randint(0,1) == 1

 class BLIPConnectionTest(unittest.TestCase):

     def setUp(self):

         self.connection = Connection( ('localhost',46353) )

         self.nRepliesPending = 0

     def sendRequest(self):

         size = random.randint(0,32767)

         io = StringIO()

         for i in xrange(0,size):

             io.write( chr(i % 256) )

         body = io.getvalue()

         io.close

         req = OutgoingRequest(self.connection, body,{'Content-Type': 'application/octet-stream',

                                                      'User-Agent':  'PyBLIP',

                                                      'Date': datetime.now(),

                                                      'Size': size})

         req.compressed = randbool()

         req.urgent     = (random.randint(0,kUrgentEvery-1)==0)

         req.response.onComplete = self.gotResponse

         return req.send()

     def gotResponse(self, response):

         self.nRepliesPending -= 1

         logging.info("Got response!: %s (%i pending)",response,self.nRepliesPending)

         request = response.request

         assert response.body == request.body

     def testClient(self):

         lastReqTime = None

         nIterations = 0

         while nIterations < 10:

             asyncore.loop(timeout=kSendInterval,count=1)

             now = datetime.now()

             if self.connection.status!=kOpening and (not lastReqTime or (now-lastReqTime).microseconds >= kSendInterval*1.0e6):

                 lastReqTime = now

                 for i in xrange(0,kNBatchedMessages):

                     if not self.sendRequest():

                         logging.warn("Couldn't send request (connection is probably closed)")

                         break;

                     self.nRepliesPending += 1

                 nIterations += 1

     def tearDown(self):

         self.connection.close()

         asyncore.loop() # got to give it time to negotiate close; this call should exit eventually

 if __name__ == '__main__':

     logging.basicConfig(level=logging.DEBUG)

     unittest.main()