old_contents: #!/usr/bin/env python3
  # Copyright (c) 2017-2018 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 resendwallettransactions RPC."""
  
  from test_framework.test_framework import BitcoinTestFramework
  from test_framework.util import assert_equal, assert_raises_rpc_error
  
  class ResendWalletTransactionsTest(BitcoinTestFramework):
  
      def __init__(self):
          super().__init__()
          self.extra_args = [['--walletbroadcast=false']]
          self.num_nodes = 1
  
      def skip_test_if_missing_module(self):
          self.skip_if_no_wallet()
  
      def run_test(self):
          # Should raise RPC_WALLET_ERROR (-4) if walletbroadcast is disabled.
          assert_raises_rpc_error(-4, "Error: Wallet transaction broadcasting is disabled with -walletbroadcast", self.nodes[0].resendwallettransactions)
  
          # Should return an empty array if there aren't unconfirmed wallet transactions.
          self.stop_node(0)
          self.start_node(0, extra_args=[])
          assert_equal(self.nodes[0].resendwallettransactions(), [])
  
          # Should return an array with the unconfirmed wallet transaction.
          txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 1)
          assert_equal(self.nodes[0].resendwallettransactions(), [txid])
  
  if __name__ == '__main__':
      ResendWalletTransactionsTest().main()
  
new_contents: #!/usr/bin/env python3
  # Copyright (c) 2017-2018 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 that the wallet resends transactions periodically."""
  from collections import defaultdict
  import time
  
  from test_framework.blocktools import create_block, create_coinbase
  from test_framework.messages import ToHex
  from test_framework.mininode import P2PInterface, mininode_lock
  from test_framework.test_framework import BitcoinTestFramework
  from test_framework.util import assert_equal, wait_until
  
  class P2PStoreTxInvs(P2PInterface):
      def __init__(self):
          super().__init__()
          self.tx_invs_received = defaultdict(int)
  
      def on_inv(self, message):
          # Store how many times invs have been received for each tx.
          for i in message.inv:
              if i.type == 1:
                  # save txid
                  self.tx_invs_received[i.hash] += 1
  
  class ResendWalletTransactionsTest(BitcoinTestFramework):
      def set_test_params(self):
          self.num_nodes = 1
  
      def skip_test_if_missing_module(self):
          self.skip_if_no_wallet()
  
      def run_test(self):
          node = self.nodes[0]  # alias
  
          node.add_p2p_connection(P2PStoreTxInvs())
  
          self.log.info("Create a new transaction and wait until it's broadcast")
          txid = int(node.sendtoaddress(node.getnewaddress(), 1), 16)
  
          # Can take a few seconds due to transaction trickling
          wait_until(lambda: node.p2p.tx_invs_received[txid] >= 1, lock=mininode_lock)
  
          # Add a second peer since txs aren't rebroadcast to the same peer (see filterInventoryKnown)
          node.add_p2p_connection(P2PStoreTxInvs())
  
          self.log.info("Create a block")
          # Create and submit a block without the transaction.
          # Transactions are only rebroadcast if there has been a block at least five minutes
          # after the last time we tried to broadcast. Use mocktime and give an extra minute to be sure.
          block_time = int(time.time()) + 6 * 60
          node.setmocktime(block_time)
          block = create_block(int(node.getbestblockhash(), 16), create_coinbase(node.getblockchaininfo()['blocks']), block_time)
          block.nVersion = 3
          block.rehash()
          block.solve()
          node.submitblock(ToHex(block))
  
          # Transaction should not be rebroadcast
          node.p2ps[1].sync_with_ping()
          assert_equal(node.p2ps[1].tx_invs_received[txid], 0)
  
          self.log.info("Transaction should be rebroadcast after 30 minutes")
          # Use mocktime and give an extra 5 minutes to be sure.
          rebroadcast_time = int(time.time()) + 41 * 60
          node.setmocktime(rebroadcast_time)
          wait_until(lambda: node.p2ps[1].tx_invs_received[txid] >= 1, lock=mininode_lock)
  
  if __name__ == '__main__':
      ResendWalletTransactionsTest().main()
  
subject: Add test for wallet rebroadcasts