add 8, 11, 12

src/assignments/assignment12/funnel_grade.rs

@@ -0,0 +1,33 @@
+//! Test cases for assignment12/funnel.rs
+
+#[cfg(test)]
+mod test_funnel {
+    use super::super::funnel::*;
+    use ntest::timeout;
+
+    use std::sync::mpsc::channel;
+    use std::thread;
+
+    #[test]
+    #[timeout(5000)]
+    fn test_funnel_concurrent() {
+        let (txs, rxs): (Vec<_>, Vec<_>) = (0..10).map(|_| channel::<u32>()).unzip();
+        let (tx, rx) = channel::<u32>();
+        let filter = |x: &u32| x % 2 == 0;
+
+        let thread_txs_rx = thread::spawn(move || {
+            for i in 0..100 {
+                let idx = (i * 7) % 13 * 17 % 10;
+                txs[idx].send(i as u32).unwrap();
+                if i % 2 == 0 {
+                    let x = rx.recv().unwrap();
+                    assert_eq!(x, i as u32);
+                }
+            }
+        });
+        let thread_funnel = spawn_funnel(rxs, tx, filter);
+
+        thread_txs_rx.join().unwrap();
+        thread_funnel.join().unwrap();
+    }
+}