reload_max_log_level.rs

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#![cfg(all(feature = "env-filter", feature = "tracing-log"))]

use tracing::{self, Level};

use tracing_mock::{expect, subscriber};

use tracing_subscriber::{filter::LevelFilter, prelude::*, reload};

#[test]

fn reload_max_log_level() {

    let (subscriber, finished) = subscriber::mock()

        .event(expect::event().at_level(Level::INFO))

        .event(expect::event().at_level(Level::DEBUG))

        .event(expect::event().at_level(Level::INFO))

        .only()

        .run_with_handle();

    let (filter, reload_handle) = reload::Layer::new(LevelFilter::INFO);

    subscriber.with(filter).init();

    assert!(log::log_enabled!(log::Level::Info));

    assert!(!log::log_enabled!(log::Level::Debug));

    assert!(!log::log_enabled!(log::Level::Trace));

    log::debug!("i'm disabled");

    log::info!("i'm enabled");

    reload_handle

        .reload(Level::DEBUG)

        .expect("reloading succeeds");

    assert!(log::log_enabled!(log::Level::Info));

    assert!(log::log_enabled!(log::Level::Debug));

    assert!(!log::log_enabled!(log::Level::Trace));

    log::debug!("i'm enabled now");

    log::info!("i'm still enabled, too");

    finished.assert_finished();