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// These tests require the thread-local scoped dispatcher, which only works when
// we have a standard library. The behaviour being tested should be the same
// with the standard lib disabled.
//
// The alternative would be for each of these tests to be defined in a separate
// file, which is :(
#![cfg(feature = "std")]
#[macro_use]
extern crate tracing;
use tracing::{
span,
subscriber::{with_default, Interest, Subscriber},
Event, Level, Metadata,
};
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test::wasm_bindgen_test)]
#[test]
fn event_macros_dont_infinite_loop() {
// This test ensures that an event macro within a subscriber
// won't cause an infinite loop of events.
struct TestSubscriber;
impl Subscriber for TestSubscriber {
fn register_callsite(&self, _: &Metadata<'_>) -> Interest {
// Always return sometimes so that `enabled` will be called
// (which can loop).
Interest::sometimes()
}
fn enabled(&self, meta: &Metadata<'_>) -> bool {
assert!(meta.fields().iter().any(|f| f.name() == "foo"));
event!(Level::TRACE, bar = false);
true
}
fn new_span(&self, _: &span::Attributes<'_>) -> span::Id {
span::Id::from_u64(0xAAAA)
}
fn record(&self, _: &span::Id, _: &span::Record<'_>) {}
fn record_follows_from(&self, _: &span::Id, _: &span::Id) {}
fn event(&self, event: &Event<'_>) {
assert!(event.metadata().fields().iter().any(|f| f.name() == "foo"));
event!(Level::TRACE, baz = false);
}
fn enter(&self, _: &span::Id) {}
fn exit(&self, _: &span::Id) {}
}
with_default(TestSubscriber, || {
event!(Level::TRACE, foo = false);
})
}
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