test/functional/getblocktemplate_longpoll.py

   1 #!/usr/bin/env python3
   2 # Copyright (c) 2014-2017 The Bitcoin Core developers
   3 # Distributed under the MIT software license, see the accompanying
   4 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5 """Test longpolling with getblocktemplate."""
   6
   7 from test_framework.test_framework import BitcoinTestFramework
   8 from test_framework.util import *
   9
  10 import threading
  11
  12 class LongpollThread(threading.Thread):
  13     def __init__(self, node):
  14         threading.Thread.__init__(self)
  15         # query current longpollid
  16         templat = node.getblocktemplate()
  17         self.longpollid = templat['longpollid']
  18         # create a new connection to the node, we can't use the same
  19         # connection from two threads
  20         self.node = get_rpc_proxy(node.url, 1, timeout=600, coveragedir=node.coverage_dir)
  21
  22     def run(self):
  23         self.node.getblocktemplate({'longpollid':self.longpollid})
  24
  25 class GetBlockTemplateLPTest(BitcoinTestFramework):
  26     def set_test_params(self):
  27         self.num_nodes = 2
  28
  29     def run_test(self):
  30         self.log.info("Warning: this test will take about 70 seconds in the best case. Be patient.")
  31         self.nodes[0].generate(10)
  32         templat = self.nodes[0].getblocktemplate()
  33         longpollid = templat['longpollid']
  34         # longpollid should not change between successive invocations if nothing else happens
  35         templat2 = self.nodes[0].getblocktemplate()
  36         assert(templat2['longpollid'] == longpollid)
  37
  38         # Test 1: test that the longpolling wait if we do nothing
  39         thr = LongpollThread(self.nodes[0])
  40         thr.start()
  41         # check that thread still lives
  42         thr.join(5)  # wait 5 seconds or until thread exits
  43         assert(thr.is_alive())
  44
  45         # Test 2: test that longpoll will terminate if another node generates a block
  46         self.nodes[1].generate(1)  # generate a block on another node
  47         # check that thread will exit now that new transaction entered mempool
  48         thr.join(5)  # wait 5 seconds or until thread exits
  49         assert(not thr.is_alive())
  50
  51         # Test 3: test that longpoll will terminate if we generate a block ourselves
  52         thr = LongpollThread(self.nodes[0])
  53         thr.start()
  54         self.nodes[0].generate(1)  # generate a block on another node
  55         thr.join(5)  # wait 5 seconds or until thread exits
  56         assert(not thr.is_alive())
  57
  58         # Test 4: test that introducing a new transaction into the mempool will terminate the longpoll
  59         thr = LongpollThread(self.nodes[0])
  60         thr.start()
  61         # generate a random transaction and submit it
  62         min_relay_fee = self.nodes[0].getnetworkinfo()["relayfee"]
  63         # min_relay_fee is fee per 1000 bytes, which should be more than enough.
  64         (txid, txhex, fee) = random_transaction(self.nodes, Decimal("1.1"), min_relay_fee, Decimal("0.001"), 20)
  65         # after one minute, every 10 seconds the mempool is probed, so in 80 seconds it should have returned
  66         thr.join(60 + 20)
  67         assert(not thr.is_alive())
  68
  69 if __name__ == '__main__':
  70     GetBlockTemplateLPTest().main()
  71