src/test/run-make/libtest-thread-limit/test.rs


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#![feature(once_cell)]

use std::{io::ErrorKind, lazy::SyncOnceCell, thread::{self, Builder, ThreadId}};

static THREAD_ID: SyncOnceCell<ThreadId> = SyncOnceCell::new();

#[test]
fn spawn_thread_would_block() {
    assert_eq!(Builder::new().spawn(|| unreachable!()).unwrap_err().kind(), ErrorKind::WouldBlock);
    THREAD_ID.set(thread::current().id()).unwrap();
}

#[test]
fn run_in_same_thread() {
    assert_eq!(*THREAD_ID.get().unwrap(), thread::current().id());
}