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https://github.com/tokio-rs/tracing.git
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## Motivation As discussed in #383 , adds the new `set_default` method. ## Solution * Add `tracing::subscriber::set_default` which sets the default subscriber and returns a drop guard. This drop guard will reset the dispatch on drop. * Add `tracing_core::dispatcher::set_default` method which sets the default dispatch and returns a drop guard. * Update `tracing_core::dispatcher::with_default` method to use the new `tracing_core::dispatcher::set_default` method. * Add test to confirm expected behavior Fixes: #383
35 lines
894 B
Rust
35 lines
894 B
Rust
mod common;
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use common::*;
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use tracing_core::dispatcher::*;
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#[test]
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fn global_dispatch() {
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set_global_default(Dispatch::new(TestSubscriberA)).expect("global dispatch set failed");
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get_default(|current| {
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assert!(
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current.is::<TestSubscriberA>(),
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"global dispatch get failed"
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)
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});
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#[cfg(feature = "std")]
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with_default(&Dispatch::new(TestSubscriberB), || {
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get_default(|current| {
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assert!(
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current.is::<TestSubscriberB>(),
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"thread-local override of global dispatch failed"
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)
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});
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});
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get_default(|current| {
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assert!(
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current.is::<TestSubscriberA>(),
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"reset to global override failed"
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)
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});
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set_global_default(Dispatch::new(TestSubscriberA))
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.expect_err("double global dispatch set succeeded");
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}
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