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#!/usr/bin/env python3
# Copyright (c) 2022 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 block download
Ensure that even in IBD, we'll eventually sync chain from inbound peers
(whether we have only inbound peers or both inbound and outbound peers).
"""
from test_framework.test_framework import BitcoinTestFramework
class BlockSyncTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 3
def setup_network(self):
self.setup_nodes()
# Construct a network:
# node0 -> node1 -> node2
# So node1 has both an inbound and outbound peer.
# In our test, we will mine a block on node0, and ensure that it makes
# to to both node1 and node2.
self.connect_nodes(0, 1)
self.connect_nodes(1, 2)
def run_test(self):
self.log.info("Setup network: node0->node1->node2")
self.log.info("Mining one block on node0 and verify all nodes sync")
self.generate(self.nodes[0], 1)
self.log.info("Success!")
if __name__ == '__main__':
BlockSyncTest().main()
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