f - Add handle unkown peer test 2

Add update_channel_config API coverage

Author: ViktorT-11

lightning/src/ln/channelmanager.rs

@@ -7562,6 +7562,7 @@ mod tests {
 	use util::errors::APIError;
 	use util::events::{Event, MessageSendEvent, MessageSendEventsProvider, ClosureReason};
 	use util::test_utils;
+	use util::config::ChannelConfig;
 	use chain::keysinterface::KeysInterface;
 
 	#[cfg(feature = "std")]
@@ -8337,6 +8338,8 @@ mod tests {
 
 		check_unkown_peer_error(nodes[0].node.force_close_without_broadcasting_txn(&channel_id, &unkown_public_key), unkown_public_key);
 
+		check_unkown_peer_error(nodes[0].node.update_channel_config(&unkown_public_key, &[channel_id], &ChannelConfig::default()), unkown_public_key);
+
 		nodes[0].node.handle_shutdown(&unkown_public_key, &InitFeatures::known(), &shutdown_msg);
 		check_unkown_peer_msg_event(&nodes[0], unkown_public_key, channel_id);