f add test

Author: TheBlueMatt

lightning-invoice/src/utils.rs

@@ -734,6 +734,33 @@ mod test {
 		match_invoice_routes(Some(5000), &nodes[0], scid_aliases);
 	}
 
+	#[test]
+	fn test_hints_has_only_online_channels() {
+		let chanmon_cfgs = create_chanmon_cfgs(3);
+		let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
+		let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
+		let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
+		let chan_a = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 0, 10_000_000, 0, channelmanager::provided_init_features(), channelmanager::provided_init_features());
+		let chan_b = create_unannounced_chan_between_nodes_with_value(&nodes, 2, 0, 10_000_000, 0, channelmanager::provided_init_features(), channelmanager::provided_init_features());
+
+		// With both peers connected we should get all hints
+		let mut scid_aliases = HashSet::new();
+		scid_aliases.insert(chan_a.0.short_channel_id_alias.unwrap());
+		scid_aliases.insert(chan_b.0.short_channel_id_alias.unwrap());
+
+		match_invoice_routes(Some(5000), &nodes[0], scid_aliases.clone());
+
+		// With only one peer connected other hints should go away
+		scid_aliases.remove(&chan_b.0.short_channel_id_alias.unwrap());
+		nodes[0].node.peer_disconnected(&nodes[2].node.get_our_node_id(), false);
+		match_invoice_routes(Some(5000), &nodes[0], scid_aliases.clone());
+
+		// With both peers disconnected we should just get all the hints
+		scid_aliases.insert(chan_b.0.short_channel_id_alias.unwrap());
+		nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
+		match_invoice_routes(Some(5000), &nodes[0], scid_aliases);
+	}
+
 	#[test]
 	fn test_forwarding_info_not_assigned_channel_excluded_from_hints() {
 		let chanmon_cfgs = create_chanmon_cfgs(3);