signal_drop_signal.rs

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#![warn(rust_2018_idioms)]

#![cfg(feature = "full")]

#![cfg(unix)]

mod support {

    pub mod signal;

use support::signal::send_signal;

use tokio::signal::unix::{signal, SignalKind};

#[tokio::test]

async fn dropping_signal_does_not_deregister_any_other_instances() {

    let kind = SignalKind::user_defined1();

    // Signals should not starve based on ordering

    let first_duplicate_signal = signal(kind).expect("failed to register first duplicate signal");

    let mut sig = signal(kind).expect("failed to register signal");

    let second_duplicate_signal = signal(kind).expect("failed to register second duplicate signal");

    drop(first_duplicate_signal);

    drop(second_duplicate_signal);

    send_signal(libc::SIGUSR1);

    let _ = sig.recv().await;