Move std::sync unit tests to integration tests

This removes two minor OnceLock tests which test private methods. The
rest of the tests should be more than enough to catch mistakes in those
private methods. Also makes ReentrantLock::try_lock public. And finally
it makes the mpmc tests actually run.

1 files changed, 0 insertions, 35 deletions

diff --git a/library/std/src/sync/barrier/tests.rs b/library/std/src/sync/barrier/tests.rs
deleted file mode 100644
index 0fbcd998812..00000000000
--- a/library/std/src/sync/barrier/tests.rs
+++ /dev/null
@@ -1,35 +0,0 @@
-use crate::sync::mpsc::{TryRecvError, channel};
-use crate::sync::{Arc, Barrier};
-use crate::thread;
-
-#[test]
-#[cfg_attr(any(target_os = "emscripten", target_os = "wasi"), ignore)] // no threads
-fn test_barrier() {
-    const N: usize = 10;
-
-    let barrier = Arc::new(Barrier::new(N));
-    let (tx, rx) = channel();
-
-    for _ in 0..N - 1 {
-        let c = barrier.clone();
-        let tx = tx.clone();
-        thread::spawn(move || {
-            tx.send(c.wait().is_leader()).unwrap();
-        });
-    }
-
-    // At this point, all spawned threads should be blocked,
-    // so we shouldn't get anything from the port
-    assert!(matches!(rx.try_recv(), Err(TryRecvError::Empty)));
-
-    let mut leader_found = barrier.wait().is_leader();
-
-    // Now, the barrier is cleared and we should get data.
-    for _ in 0..N - 1 {
-        if rx.recv().unwrap() {
-            assert!(!leader_found);
-            leader_found = true;
-        }
-    }
-    assert!(leader_found);
-}