+ // Wait for the channel to be fully established
+
+ meshlink_set_channel_poll_cb(mesh_a, channel, poll_cb);
+ assert(wait_sync_flag(&poll_flag, 10));
+
+ // Check that we can send zero bytes, and that it is received
+
+ assert(meshlink_channel_send(mesh_a, channel, "", 0) == 0);
+ assert(wait_sync_flag(&small_flag, 1));
+