1 files changed, 73 insertions, 0 deletions
diff --git a/test/functional/getblocktemplate_longpoll.py b/test/functional/getblocktemplate_longpoll.py
new file mode 100755
index 0000000000..bbe1dda5f7
--- /dev/null
+++ b/test/functional/getblocktemplate_longpoll.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+# Copyright (c) 2014-2016 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test longpolling with getblocktemplate."""
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import *
+
+import threading
+
+class LongpollThread(threading.Thread):
+    def __init__(self, node):
+        threading.Thread.__init__(self)
+        # query current longpollid
+        templat = node.getblocktemplate()
+        self.longpollid = templat['longpollid']
+        # create a new connection to the node, we can't use the same
+        # connection from two threads
+        self.node = get_rpc_proxy(node.url, 1, timeout=600)
+
+    def run(self):
+        self.node.getblocktemplate({'longpollid':self.longpollid})
+
+class GetBlockTemplateLPTest(BitcoinTestFramework):
+    def __init__(self):
+        super().__init__()
+        self.num_nodes = 4
+        self.setup_clean_chain = False
+
+    def run_test(self):
+        self.log.info("Warning: this test will take about 70 seconds in the best case. Be patient.")
+        self.nodes[0].generate(10)
+        templat = self.nodes[0].getblocktemplate()
+        longpollid = templat['longpollid']
+        # longpollid should not change between successive invocations if nothing else happens
+        templat2 = self.nodes[0].getblocktemplate()
+        assert(templat2['longpollid'] == longpollid)
+
+        # Test 1: test that the longpolling wait if we do nothing
+        thr = LongpollThread(self.nodes[0])
+        thr.start()
+        # check that thread still lives
+        thr.join(5)  # wait 5 seconds or until thread exits
+        assert(thr.is_alive())
+
+        # Test 2: test that longpoll will terminate if another node generates a block
+        self.nodes[1].generate(1)  # generate a block on another node
+        # check that thread will exit now that new transaction entered mempool
+        thr.join(5)  # wait 5 seconds or until thread exits
+        assert(not thr.is_alive())
+
+        # Test 3: test that longpoll will terminate if we generate a block ourselves
+        thr = LongpollThread(self.nodes[0])
+        thr.start()
+        self.nodes[0].generate(1)  # generate a block on another node
+        thr.join(5)  # wait 5 seconds or until thread exits
+        assert(not thr.is_alive())
+
+        # Test 4: test that introducing a new transaction into the mempool will terminate the longpoll
+        thr = LongpollThread(self.nodes[0])
+        thr.start()
+        # generate a random transaction and submit it
+        min_relay_fee = self.nodes[0].getnetworkinfo()["relayfee"]
+        # min_relay_fee is fee per 1000 bytes, which should be more than enough.
+        (txid, txhex, fee) = random_transaction(self.nodes, Decimal("1.1"), min_relay_fee, Decimal("0.001"), 20)
+        # after one minute, every 10 seconds the mempool is probed, so in 80 seconds it should have returned
+        thr.join(60 + 20)
+        assert(not thr.is_alive())
+
+if __name__ == '__main__':
+    GetBlockTemplateLPTest().main()
+