1 #![cfg(feature = "registry")]
2 use tracing::level_filters::LevelFilter;
3 use tracing::Subscriber;
4 use tracing_subscriber::prelude::*;
5 
6 #[test]
just_empty_vec()7 fn just_empty_vec() {
8     // Just a None means everything is off
9     let subscriber = tracing_subscriber::registry().with(Vec::<LevelFilter>::new());
10     assert_eq!(subscriber.max_level_hint(), Some(LevelFilter::OFF));
11 }
12 
13 #[test]
layer_and_empty_vec()14 fn layer_and_empty_vec() {
15     let subscriber = tracing_subscriber::registry()
16         .with(LevelFilter::INFO)
17         .with(Vec::<LevelFilter>::new());
18     assert_eq!(subscriber.max_level_hint(), Some(LevelFilter::INFO));
19 }
20