text: #!/usr/bin/env python3
  # Copyright (c) 2015 The Bitcoin Core developers
  # Copyright (c) 2015-2017 The Bitcoin Unlimited developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #
  # Test ZMQ interface
  #
  
  from test_framework.test_framework import BitcoinTestFramework
  from test_framework.util import *
  import zmq
  import struct
  
  import http.client
  import urllib.parse
  
  class ZMQTest (BitcoinTestFramework):
  
      port = 28332
  
      def setup_nodes(self):
          self.zmqContext = zmq.Context()
          self.zmqSubSocket = self.zmqContext.socket(zmq.SUB)
          self.zmqSubSocket.setsockopt(zmq.SUBSCRIBE, b"hashblock")
          self.zmqSubSocket.setsockopt(zmq.SUBSCRIBE, b"hashtx")
          self.zmqSubSocket.linger = 500
          self.zmqSubSocket.connect("tcp://127.0.0.1:%i" % self.port)
          return start_nodes(4, self.options.tmpdir, extra_args=[
              ['-zmqpubhashtx=tcp://127.0.0.1:'+str(self.port), '-zmqpubhashblock=tcp://127.0.0.1:'+str(self.port)],
              [],
              [],
              []
              ])
  
      def run_test(self):
          try:
              self.sync_all()
  
              genhashes = self.nodes[0].generate(1)
              self.sync_all()
  
              print("listen...")
              msg = self.zmqSubSocket.recv_multipart()
              topic = msg[0]
              body = msg[1]
  
              msg = self.zmqSubSocket.recv_multipart()
              topic = msg[0]
              body = msg[1]
              blkhash = bytes_to_hex_str(body)
  
              assert_equal(genhashes[0], blkhash) #blockhash from generate must be equal to the hash received over zmq
  
              n = 10
              genhashes = self.nodes[1].generate(n)
              self.sync_all()
  
              zmqHashes = []
              for x in range(0,n*2):
                  msg = self.zmqSubSocket.recv_multipart()
                  topic = msg[0]
                  body = msg[1]
                  if topic == b"hashblock":
                      zmqHashes.append(bytes_to_hex_str(body))
  
              for x in range(0,n):
                  assert_equal(genhashes[x], zmqHashes[x]) #blockhash from generate must be equal to the hash received over zmq
  
              #test tx from a second node
              hashRPC = self.nodes[1].sendtoaddress(self.nodes[0].getnewaddress(), 1.0)
              self.sync_all()
  
              # now we should receive a zmq msg because the tx was broadcast
              msg = self.zmqSubSocket.recv_multipart()
              topic = msg[0]
              body = msg[1]
              hashZMQ = ""
              if topic == b"hashtx":
                  hashZMQ = bytes_to_hex_str(body)
  
              assert_equal(hashRPC, hashZMQ) #blockhash from generate must be equal to the hash received over zmq
          finally:
              self.zmqSubSocket.close()
              self.zmqSubSocket = None
              self.zmqContext.destroy()
              self.zmqContext = None
  
  
  if __name__ == '__main__':
      ZMQTest ().main ()
  
  def Test():
      ZMQTest ().main ()
   
  