#tracing #logging #log #tracing-subscriber #test

tracing-span-capture

Capture and record logs for tracing span id

1 unstable release

0.0.1 Mar 29, 2023

#60 in #tracing-subscriber

26 downloads per month

MIT/Apache

12KB
76 lines

Capture and record logs for tracing span id

This crate allow testing if function emitted logs.

Example

Example how to use it with cucumber, you can find here.

use tracing::{error, span, Level};
use tracing_span_capture::{RecordedLogs, TracingSpanCaptureLayer};
use tracing_subscriber::layer::SubscriberExt;
use tracing_subscriber::util::SubscriberInitExt;

fn tested_code() {
    error!("try capture this");
}

fn main() {
    tracing_subscriber::fmt()
        .finish()
        .with(TracingSpanCaptureLayer)
        .init();

    let span = span!(Level::INFO, "");
    let record = RecordedLogs::new(&span);
    {
        let _enter = span.enter();
        tested_code();
    }
    
    let logs = record.into_logs();
    let last_log = logs.into_iter().rev().next().unwrap();
    assert_eq!(last_log.message, "try capture this");
}

License

Licensed under either of:

Dependencies

~1MB
~18K SLoC