Setup database before running any of the test

help
9

I don't think this works:

use std::sync::atomic::{AtomicBool, Ordering};

static INITIALISED: AtomicBool = AtomicBool::new(false);

async fn reset_and_seed_db() {
    if INITIALISED.swap(true, Ordering::SeqCst) {
        return;
    }
    std::thread::sleep(std::time::Duration::from_millis(100));
    println!("Doing stuff. (This must happen first!)")
}

async fn foo() {
    reset_and_seed_db().await;
    println!("I hope stuff has been done.");
}

#[tokio::main]
async fn main() {
    let t1 = tokio::spawn(foo());
    let t2 = tokio::spawn(foo());
    let (r1, r2) = tokio::join!(t1, t2);
    r1.unwrap();
    r2.unwrap();
}

(Playground)

Output:

I hope stuff has been done.
Doing stuff. (This must happen first!)
I hope stuff has been done.

P.S.: What you really need is an async(!) mutex like @Heliozoa suggested, because you want to suspend the other tasks until initialization is complete. (see Playground with tokio's Mutex)