Merge bitcoin#22568: test: add addr-fetch peer connection state and t…

…imeout coverage

f8d8eb5 test: add addr-fetch timeout connection coverage in p2p_addrfetch.py (Jon Atack)
9321086 test: add assert_getpeerinfo method and coverage in p2p_addrfetch.py (Jon Atack)

Pull request description:

  This patch adds additional addr-fetch peer connection state and timeout coverage as a follow-up to bitcoin#22096.

ACKs for top commit:
  Saviour1001:
    Tested ACK <code>[f8d8eb5](https://github.com/bitcoin/bitcoin/pull/22568/commits/f8d8eb5fdaa93b6e5b77fd901b94927dc3a0473e)</code>
  mzumsande:
    Code review ACK f8d8eb5

Tree-SHA512: 9a13a705d1da6b308d6dcbc6930575205e2e88bfe9f2e7cb4e0c4c40d26538430e6b02c6c772d0cee64e534777348291469a139f99afbf9d4f93f31b9e7b0818

test/functional/p2p_addrfetch.py

@@ -21,18 +21,24 @@
 
 
 class P2PAddrFetch(BitcoinTestFramework):
-
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 1
 
+    def assert_getpeerinfo(self, *, peer_ids):
+        num_peers = len(peer_ids)
+        info = self.nodes[0].getpeerinfo()
+        assert_equal(len(info), num_peers)
+        for n in range(0, num_peers):
+            assert_equal(info[n]['id'], peer_ids[n])
+            assert_equal(info[n]['connection_type'], 'addr-fetch')
+
     def run_test(self):
         node = self.nodes[0]
         self.log.info("Connect to an addr-fetch peer")
-        peer = node.add_outbound_p2p_connection(P2PInterface(), p2p_idx=0, connection_type="addr-fetch")
-        info = node.getpeerinfo()
-        assert_equal(len(info), 1)
-        assert_equal(info[0]['connection_type'], 'addr-fetch')
+        peer_id = 0
+        peer = node.add_outbound_p2p_connection(P2PInterface(), p2p_idx=peer_id, connection_type="addr-fetch")
+        self.assert_getpeerinfo(peer_ids=[peer_id])
 
         self.log.info("Check that we send getaddr but don't try to sync headers with the addr-fetch peer")
         peer.sync_send_with_ping()
@@ -45,17 +51,28 @@ def run_test(self):
         msg = msg_addr()
         msg.addrs = [ADDR]
         peer.send_and_ping(msg)
-        assert_equal(len(node.getpeerinfo()), 1)
+        self.assert_getpeerinfo(peer_ids=[peer_id])
 
         self.log.info("Check that answering with larger addr messages leads to disconnect")
         msg.addrs = [ADDR] * 2
         peer.send_message(msg)
         peer.wait_for_disconnect(timeout=5)
 
         self.log.info("Check timeout for addr-fetch peer that does not send addrs")
-        peer = node.add_outbound_p2p_connection(P2PInterface(), p2p_idx=1, connection_type="addr-fetch")
-        node.setmocktime(int(time.time()) + 301)  # Timeout: 5 minutes
+        peer_id = 1
+        peer = node.add_outbound_p2p_connection(P2PInterface(), p2p_idx=peer_id, connection_type="addr-fetch")
+
+        time_now = int(time.time())
+        self.assert_getpeerinfo(peer_ids=[peer_id])
+
+        # Expect addr-fetch peer connection to be maintained up to 5 minutes.
+        node.setmocktime(time_now + 295)
+        self.assert_getpeerinfo(peer_ids=[peer_id])
+
+        # Expect addr-fetch peer connection to be disconnected after 5 minutes.
+        node.setmocktime(time_now + 301)
         peer.wait_for_disconnect(timeout=5)
+        self.assert_getpeerinfo(peer_ids=[])
 
 
 if __name__ == '__main__':