| #![cfg(all(feature = "env-filter", feature = "fmt"))] |
| use tracing::{self, subscriber::with_default, Span}; |
| use tracing_subscriber::{filter::EnvFilter, FmtSubscriber}; |
| |
| #[test] |
| fn duplicate_spans() { |
| let subscriber = FmtSubscriber::builder() |
| .with_env_filter(EnvFilter::new("[root]=debug")) |
| .finish(); |
| |
| with_default(subscriber, || { |
| let root = tracing::debug_span!("root"); |
| root.in_scope(|| { |
| // root: |
| assert_eq!(root, Span::current(), "Current span must be 'root'"); |
| let leaf = tracing::debug_span!("leaf"); |
| leaf.in_scope(|| { |
| // root:leaf: |
| assert_eq!(leaf, Span::current(), "Current span must be 'leaf'"); |
| root.in_scope(|| { |
| // root:leaf: |
| assert_eq!( |
| leaf, |
| Span::current(), |
| "Current span must be 'leaf' after entering twice the 'root' span" |
| ); |
| }) |
| }); |
| // root: |
| assert_eq!( |
| root, |
| Span::current(), |
| "Current span must be root ('leaf' exited, nested 'root' exited)" |
| ); |
| |
| root.in_scope(|| { |
| assert_eq!(root, Span::current(), "Current span must be root"); |
| }); |
| // root: |
| assert_eq!( |
| root, |
| Span::current(), |
| "Current span must still be root after exiting nested 'root'" |
| ); |
| }); |
| }); |
| } |