vendor/tracing-subscriber/tests/option.rs

   1 #![cfg(feature = "registry")]
   2 use tracing::level_filters::LevelFilter;
   3 use tracing::Subscriber;
   4 use tracing_subscriber::prelude::*;
   5
   6 // This test is just used to compare to the tests below
   7 #[test]
   8 fn just_layer() {
   9     let subscriber = tracing_subscriber::registry().with(LevelFilter::INFO);
  10     assert_eq!(subscriber.max_level_hint(), Some(LevelFilter::INFO));
  11 }
  12
  13 #[test]
  14 fn subscriber_and_option_some_layer() {
  15     let subscriber = tracing_subscriber::registry()
  16         .with(LevelFilter::INFO)
  17         .with(Some(LevelFilter::DEBUG));
  18     assert_eq!(subscriber.max_level_hint(), Some(LevelFilter::DEBUG));
  19 }
  20
  21 #[test]
  22 fn subscriber_and_option_none_layer() {
  23     // None means the other layer takes control
  24     let subscriber = tracing_subscriber::registry()
  25         .with(LevelFilter::ERROR)
  26         .with(None::<LevelFilter>);
  27     assert_eq!(subscriber.max_level_hint(), Some(LevelFilter::ERROR));
  28 }
  29
  30 #[test]
  31 fn just_option_some_layer() {
  32     // Just a None means everything is off
  33     let subscriber = tracing_subscriber::registry().with(None::<LevelFilter>);
  34     assert_eq!(subscriber.max_level_hint(), Some(LevelFilter::OFF));
  35 }
  36
  37 #[test]
  38 fn just_option_none_layer() {
  39     let subscriber = tracing_subscriber::registry().with(Some(LevelFilter::ERROR));
  40     assert_eq!(subscriber.max_level_hint(), Some(LevelFilter::ERROR));
  41 }