1 files changed, 47 insertions, 0 deletions
diff --git a/library/std/src/sync/mpsc/mpsc_queue/tests.rs b/library/std/src/sync/mpsc/mpsc_queue/tests.rs
new file mode 100644
index 00000000000..348b83424b0
--- /dev/null
+++ b/library/std/src/sync/mpsc/mpsc_queue/tests.rs
@@ -0,0 +1,47 @@
+use super::{Data, Empty, Inconsistent, Queue};
+use crate::sync::mpsc::channel;
+use crate::sync::Arc;
+use crate::thread;
+
+#[test]
+fn test_full() {
+    let q: Queue<Box<_>> = Queue::new();
+    q.push(box 1);
+    q.push(box 2);
+}
+
+#[test]
+fn test() {
+    let nthreads = 8;
+    let nmsgs = 1000;
+    let q = Queue::new();
+    match q.pop() {
+        Empty => {}
+        Inconsistent | Data(..) => panic!(),
+    }
+    let (tx, rx) = channel();
+    let q = Arc::new(q);
+
+    for _ in 0..nthreads {
+        let tx = tx.clone();
+        let q = q.clone();
+        thread::spawn(move || {
+            for i in 0..nmsgs {
+                q.push(i);
+            }
+            tx.send(()).unwrap();
+        });
+    }
+
+    let mut i = 0;
+    while i < nthreads * nmsgs {
+        match q.pop() {
+            Empty | Inconsistent => {}
+            Data(_) => i += 1,
+        }
+    }
+    drop(tx);
+    for _ in 0..nthreads {
+        rx.recv().unwrap();
+    }
+}