child_process_test.rs

#[cfg(test)]
mod tests {
    use std::process::Command;
    use std::time::Duration;
    use std::{env, thread};

    #[test]
    fn child_process_hack() {
        let in_child = env::args().any(|x| x == "child_process_hack");
        if !in_child {
            return;
        }
        eprintln!("hello from child: {:?}", env::args().collect::<Vec<_>>());
        thread::sleep(Duration::from_secs(u64::MAX));
    }

    #[test]
    fn it_works() {
        let args = env::args().collect::<Vec<_>>();
        eprintln!("hello from parent: {:?}", args);
        let mut child_args = args[1..]
            .iter()
            .filter(|x| x.starts_with("--"))
            .collect::<Vec<_>>();
        let foo = "child_process_hack".to_string();
        child_args.push(&foo);
        // TODO: Maybe hook up the child's stdout so all the lines are prefixed
        // or something.
        let mut child = Command::new(&args[0])
            .args(&child_args)
            .spawn()
            .expect("WIP");
        thread::sleep(Duration::from_secs(5));
        child.kill().expect("WIP");
    }
}