systemd-run 0.9.0

A Rust crate for running processes as Systemd transient services.
Documentation 
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use std::time::Duration;
use systemd_run::RunUser;

#[async_std::test]
async fn test_true() {
    let r = RunUser::new("/bin/true")
        .start()
        .await
        .expect("should be able to start /bin/true")
        .wait()
        .await
        .expect("should be able to get the status of the Run");
    assert!(!r.is_failed(), "/bin/true should run successfully");
}

#[async_std::test]
#[cfg(feature = "systemd_236")]
async fn test_false() {
    let r = RunUser::new("/bin/false")
        .collect_on_fail()
        .start()
        .await
        .expect("should be able to start /bin/true")
        .wait()
        .await
        .expect("should be able to get the status of the Run");
    assert!(r.is_failed(), "/bin/false should fail");
}

#[async_std::test]
async fn test_wall_time_usage() {
    let r = RunUser::new("/bin/sleep")
        .arg("1")
        .start()
        .await
        .expect("should be able to start /bin/sleep")
        .wait()
        .await
        .expect("should be able to get the status of the Run");
    assert!(!r.is_failed(), "/bin/sleep should run successfully");
    assert!(r.wall_time_usage() > Duration::from_secs(1));
}

#[async_std::test]
#[cfg(feature = "systemd_236")]
async fn test_runtime_max() {
    let r = RunUser::new("/bin/sleep")
        .arg("2")
        .runtime_max(Duration::from_secs(1))
        .collect_on_fail()
        .start()
        .await
        .expect("should be able to start /bin/sleep")
        .wait()
        .await
        .expect("should be able to get the status of the Run");
    assert!(
        r.is_failed(),
        "/bin/sleep should have failed because of a timeout"
    );
    assert!(r.wall_time_usage() > Duration::from_secs(1));
    assert!(r.wall_time_usage() < Duration::from_secs(2));
}

#[async_std::test]
#[cfg(feature = "systemd_227")]
async fn test_current_dir() {
    const D: &'static str = concat!(env!("OUT_DIR"), "/test-aux/");
    let r = RunUser::new("/bin/cat")
        .arg("stdin.txt")
        .current_dir(D)
        .start()
        .await
        .expect("should be able to start /bin/cat stdin.txt")
        .wait()
        .await
        .expect("should be able to get the status of the Run");
    assert!(!r.is_failed(), "/bin/cat stdin.txt should run successfully");
}

#[async_std::test]
#[cfg(feature = "systemd_236")]
async fn test_timeout_stop() {
    const PATH: &'static str = concat!(env!("OUT_DIR"), "/test-aux/orga-itsuka");
    let r = RunUser::new(PATH)
        .runtime_max(Duration::from_millis(500))
        .timeout_stop(Duration::from_millis(500))
        .collect_on_fail()
        .start()
        .await
        .expect("should be able to start /bin/sleep")
        .wait()
        .await
        .expect("should be able to get the status of the Run");
    assert!(
        r.is_failed(),
        "rogue program should have failed because of a timeout"
    );
    assert!(r.wall_time_usage() > Duration::from_secs(1));
    assert!(r.wall_time_usage() < Duration::from_secs(2));
}