1 files changed, 243 insertions, 0 deletions
diff --git a/vendor/rayon-core/src/spawn/test.rs b/vendor/rayon-core/src/spawn/test.rs
new file mode 100644
index 000000000..761fafc77
--- /dev/null
+++ b/vendor/rayon-core/src/spawn/test.rs
@@ -0,0 +1,243 @@
+use crate::scope;
+use std::any::Any;
+use std::sync::mpsc::channel;
+use std::sync::Mutex;
+
+use super::{spawn, spawn_fifo};
+use crate::ThreadPoolBuilder;
+
+#[test]
+fn spawn_then_join_in_worker() {
+    let (tx, rx) = channel();
+    scope(move |_| {
+        spawn(move || tx.send(22).unwrap());
+    });
+    assert_eq!(22, rx.recv().unwrap());
+}
+
+#[test]
+fn spawn_then_join_outside_worker() {
+    let (tx, rx) = channel();
+    spawn(move || tx.send(22).unwrap());
+    assert_eq!(22, rx.recv().unwrap());
+}
+
+#[test]
+fn panic_fwd() {
+    let (tx, rx) = channel();
+
+    let tx = Mutex::new(tx);
+    let panic_handler = move |err: Box<dyn Any + Send>| {
+        let tx = tx.lock().unwrap();
+        if let Some(&msg) = err.downcast_ref::<&str>() {
+            if msg == "Hello, world!" {
+                tx.send(1).unwrap();
+            } else {
+                tx.send(2).unwrap();
+            }
+        } else {
+            tx.send(3).unwrap();
+        }
+    };
+
+    let builder = ThreadPoolBuilder::new().panic_handler(panic_handler);
+
+    builder
+        .build()
+        .unwrap()
+        .spawn(move || panic!("Hello, world!"));
+
+    assert_eq!(1, rx.recv().unwrap());
+}
+
+/// Test what happens when the thread-pool is dropped but there are
+/// still active asynchronous tasks. We expect the thread-pool to stay
+/// alive and executing until those threads are complete.
+#[test]
+fn termination_while_things_are_executing() {
+    let (tx0, rx0) = channel();
+    let (tx1, rx1) = channel();
+
+    // Create a thread-pool and spawn some code in it, but then drop
+    // our reference to it.
+    {
+        let thread_pool = ThreadPoolBuilder::new().build().unwrap();
+        thread_pool.spawn(move || {
+            let data = rx0.recv().unwrap();
+
+            // At this point, we know the "main" reference to the
+            // `ThreadPool` has been dropped, but there are still
+            // active threads. Launch one more.
+            spawn(move || {
+                tx1.send(data).unwrap();
+            });
+        });
+    }
+
+    tx0.send(22).unwrap();
+    let v = rx1.recv().unwrap();
+    assert_eq!(v, 22);
+}
+
+#[test]
+fn custom_panic_handler_and_spawn() {
+    let (tx, rx) = channel();
+
+    // Create a parallel closure that will send panics on the
+    // channel; since the closure is potentially executed in parallel
+    // with itself, we have to wrap `tx` in a mutex.
+    let tx = Mutex::new(tx);
+    let panic_handler = move |e: Box<dyn Any + Send>| {
+        tx.lock().unwrap().send(e).unwrap();
+    };
+
+    // Execute an async that will panic.
+    let builder = ThreadPoolBuilder::new().panic_handler(panic_handler);
+    builder.build().unwrap().spawn(move || {
+        panic!("Hello, world!");
+    });
+
+    // Check that we got back the panic we expected.
+    let error = rx.recv().unwrap();
+    if let Some(&msg) = error.downcast_ref::<&str>() {
+        assert_eq!(msg, "Hello, world!");
+    } else {
+        panic!("did not receive a string from panic handler");
+    }
+}
+
+#[test]
+fn custom_panic_handler_and_nested_spawn() {
+    let (tx, rx) = channel();
+
+    // Create a parallel closure that will send panics on the
+    // channel; since the closure is potentially executed in parallel
+    // with itself, we have to wrap `tx` in a mutex.
+    let tx = Mutex::new(tx);
+    let panic_handler = move |e| {
+        tx.lock().unwrap().send(e).unwrap();
+    };
+
+    // Execute an async that will (eventually) panic.
+    const PANICS: usize = 3;
+    let builder = ThreadPoolBuilder::new().panic_handler(panic_handler);
+    builder.build().unwrap().spawn(move || {
+        // launch 3 nested spawn-asyncs; these should be in the same
+        // thread-pool and hence inherit the same panic handler
+        for _ in 0..PANICS {
+            spawn(move || {
+                panic!("Hello, world!");
+            });
+        }
+    });
+
+    // Check that we get back the panics we expected.
+    for _ in 0..PANICS {
+        let error = rx.recv().unwrap();
+        if let Some(&msg) = error.downcast_ref::<&str>() {
+            assert_eq!(msg, "Hello, world!");
+        } else {
+            panic!("did not receive a string from panic handler");
+        }
+    }
+}
+
+macro_rules! test_order {
+    ($outer_spawn:ident, $inner_spawn:ident) => {{
+        let builder = ThreadPoolBuilder::new().num_threads(1);
+        let pool = builder.build().unwrap();
+        let (tx, rx) = channel();
+        pool.install(move || {
+            for i in 0..10 {
+                let tx = tx.clone();
+                $outer_spawn(move || {
+                    for j in 0..10 {
+                        let tx = tx.clone();
+                        $inner_spawn(move || {
+                            tx.send(i * 10 + j).unwrap();
+                        });
+                    }
+                });
+            }
+        });
+        rx.iter().collect::<Vec<i32>>()
+    }};
+}
+
+#[test]
+fn lifo_order() {
+    // In the absence of stealing, `spawn()` jobs on a thread will run in LIFO order.
+    let vec = test_order!(spawn, spawn);
+    let expected: Vec<i32> = (0..100).rev().collect(); // LIFO -> reversed
+    assert_eq!(vec, expected);
+}
+
+#[test]
+fn fifo_order() {
+    // In the absence of stealing, `spawn_fifo()` jobs on a thread will run in FIFO order.
+    let vec = test_order!(spawn_fifo, spawn_fifo);
+    let expected: Vec<i32> = (0..100).collect(); // FIFO -> natural order
+    assert_eq!(vec, expected);
+}
+
+#[test]
+fn lifo_fifo_order() {
+    // LIFO on the outside, FIFO on the inside
+    let vec = test_order!(spawn, spawn_fifo);
+    let expected: Vec<i32> = (0..10)
+        .rev()
+        .flat_map(|i| (0..10).map(move |j| i * 10 + j))
+        .collect();
+    assert_eq!(vec, expected);
+}
+
+#[test]
+fn fifo_lifo_order() {
+    // FIFO on the outside, LIFO on the inside
+    let vec = test_order!(spawn_fifo, spawn);
+    let expected: Vec<i32> = (0..10)
+        .flat_map(|i| (0..10).rev().map(move |j| i * 10 + j))
+        .collect();
+    assert_eq!(vec, expected);
+}
+
+macro_rules! spawn_send {
+    ($spawn:ident, $tx:ident, $i:expr) => {{
+        let tx = $tx.clone();
+        $spawn(move || tx.send($i).unwrap());
+    }};
+}
+
+/// Test mixed spawns pushing a series of numbers, interleaved such
+/// such that negative values are using the second kind of spawn.
+macro_rules! test_mixed_order {
+    ($pos_spawn:ident, $neg_spawn:ident) => {{
+        let builder = ThreadPoolBuilder::new().num_threads(1);
+        let pool = builder.build().unwrap();
+        let (tx, rx) = channel();
+        pool.install(move || {
+            spawn_send!($pos_spawn, tx, 0);
+            spawn_send!($neg_spawn, tx, -1);
+            spawn_send!($pos_spawn, tx, 1);
+            spawn_send!($neg_spawn, tx, -2);
+            spawn_send!($pos_spawn, tx, 2);
+            spawn_send!($neg_spawn, tx, -3);
+            spawn_send!($pos_spawn, tx, 3);
+        });
+        rx.iter().collect::<Vec<i32>>()
+    }};
+}
+
+#[test]
+fn mixed_lifo_fifo_order() {
+    let vec = test_mixed_order!(spawn, spawn_fifo);
+    let expected = vec![3, -1, 2, -2, 1, -3, 0];
+    assert_eq!(vec, expected);
+}
+
+#[test]
+fn mixed_fifo_lifo_order() {
+    let vec = test_mixed_order!(spawn_fifo, spawn);
+    let expected = vec![0, -3, 1, -2, 2, -1, 3];
+    assert_eq!(vec, expected);
+}