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use crate::support::*;
use tracing::Level;
use tracing_subscriber::{field::Visit, layer::Filter, prelude::*};
struct FilterEvent;
impl<S> Filter<S> for FilterEvent {
fn enabled(
&self,
_meta: &tracing::Metadata<'_>,
_cx: &tracing_subscriber::layer::Context<'_, S>,
) -> bool {
true
}
fn event_enabled(
&self,
event: &tracing::Event<'_>,
_cx: &tracing_subscriber::layer::Context<'_, S>,
) -> bool {
struct ShouldEnable(bool);
impl Visit for ShouldEnable {
fn record_bool(&mut self, field: &tracing_core::Field, value: bool) {
if field.name() == "enable" {
self.0 = value;
}
}
fn record_debug(
&mut self,
_field: &tracing_core::Field,
_value: &dyn core::fmt::Debug,
) {
}
}
let mut should_enable = ShouldEnable(false);
event.record(&mut should_enable);
should_enable.0
}
}
#[test]
fn per_subscriber_event_field_filtering() {
let (expect, handle) = layer::mock()
.event(event::mock().at_level(Level::TRACE))
.event(event::mock().at_level(Level::INFO))
.done()
.run_with_handle();
let _subscriber = tracing_subscriber::registry()
.with(expect.with_filter(FilterEvent))
.set_default();
tracing::trace!(enable = true, "hello trace");
tracing::debug!("hello debug");
tracing::info!(enable = true, "hello info");
tracing::warn!(enable = false, "hello warn");
tracing::error!("hello error");
handle.assert_finished();
}
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