old_contents: #!/usr/bin/env python3
  # Copyright (c) 2021 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 ThreadDNSAddressSeed logic for querying DNS seeds."""
  
  from test_framework.p2p import P2PInterface
  from test_framework.test_framework import BitcoinTestFramework
  
  
  class P2PDNSSeeds(BitcoinTestFramework):
      def set_test_params(self):
          self.setup_clean_chain = True
          self.num_nodes = 1
          self.extra_args = [["-dnsseed=1"]]
  
      def run_test(self):
          self.existing_outbound_connections_test()
  
      def existing_outbound_connections_test(self):
          # Make sure addrman is populated to enter the conditional where we
          # delay and potentially skip DNS seeding.
          self.nodes[0].addpeeraddress("192.0.0.8", 8333)
  
          self.log.info("Check that we *do not* query DNS seeds if we have 2 outbound connections")
  
          self.restart_node(0)
          with self.nodes[0].assert_debug_log(expected_msgs=["P2P peers available. Skipped DNS seeding."], timeout=12):
              for i in range(2):
                  self.nodes[0].add_outbound_p2p_connection(P2PInterface(), p2p_idx=i, connection_type="outbound-full-relay")
  
  
  if __name__ == '__main__':
      P2PDNSSeeds().main()
  
new_contents: #!/usr/bin/env python3
  # Copyright (c) 2021 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 ThreadDNSAddressSeed logic for querying DNS seeds."""
  
  from test_framework.p2p import P2PInterface
  from test_framework.test_framework import BitcoinTestFramework
  
  
  class P2PDNSSeeds(BitcoinTestFramework):
      def set_test_params(self):
          self.setup_clean_chain = True
          self.num_nodes = 1
          self.extra_args = [["-dnsseed=1"]]
  
      def run_test(self):
          self.existing_outbound_connections_test()
          self.existing_block_relay_connections_test()
  
      def existing_outbound_connections_test(self):
          # Make sure addrman is populated to enter the conditional where we
          # delay and potentially skip DNS seeding.
          self.nodes[0].addpeeraddress("192.0.0.8", 8333)
  
          self.log.info("Check that we *do not* query DNS seeds if we have 2 outbound connections")
  
          self.restart_node(0)
          with self.nodes[0].assert_debug_log(expected_msgs=["P2P peers available. Skipped DNS seeding."], timeout=12):
              for i in range(2):
                  self.nodes[0].add_outbound_p2p_connection(P2PInterface(), p2p_idx=i, connection_type="outbound-full-relay")
  
      def existing_block_relay_connections_test(self):
          # Make sure addrman is populated to enter the conditional where we
          # delay and potentially skip DNS seeding. No-op when run after
          # existing_outbound_connections_test.
          self.nodes[0].addpeeraddress("192.0.0.8", 8333)
  
          self.log.info("Check that we *do* query DNS seeds if we only have 2 block-relay-only connections")
  
          self.restart_node(0)
          with self.nodes[0].assert_debug_log(expected_msgs=["Loading addresses from DNS seed"], timeout=12):
              # This mimics the "anchors" logic where nodes are likely to
              # reconnect to block-relay-only connections on startup.
              # Since we do not participate in addr relay with these connections,
              # we still want to query the DNS seeds.
              for i in range(2):
                  self.nodes[0].add_outbound_p2p_connection(P2PInterface(), p2p_idx=i, connection_type="block-relay-only")
  
  
  if __name__ == '__main__':
      P2PDNSSeeds().main()
  
subject: Test logic to query DNS seeds with block-relay-only connections