f test exact announcement height

Author: TheBlueMatt

lightning/src/ln/functional_tests.rs

@@ -449,8 +449,10 @@ fn do_test_1_conf_open(connect_style: ConnectStyle) {
 	send_payment(&nodes[0], &[&nodes[1]], 100_000);
 
 	// After 6 confirmations, as required by the spec, we'll send announcement_signatures and
-	// broadcast the channel_announcement.
-	connect_blocks(&nodes[0], 5);
+	// broadcast the channel_announcement (but not before exactly 6 confirmations).
+	connect_blocks(&nodes[0], 4);
+	assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
+	connect_blocks(&nodes[0], 1);
 	nodes[1].node.handle_announcement_signatures(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendAnnouncementSignatures, nodes[1].node.get_our_node_id()));
 	assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());