Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 536 insertions, 0 deletions

diff --git a/vendor/flume/tests/list.rs b/vendor/flume/tests/list.rs
new file mode 100644
index 0000000..851af88
--- /dev/null
+++ b/vendor/flume/tests/list.rs
@@ -0,0 +1,536 @@
+//! Tests for the list channel flavor.
+
+extern crate crossbeam_utils;
+extern crate rand;
+
+use std::any::Any;
+use std::sync::atomic::AtomicUsize;
+use std::sync::atomic::Ordering;
+use std::thread;
+use std::time::Duration;
+
+use flume::{unbounded, Receiver};
+use flume::{RecvError, RecvTimeoutError, TryRecvError};
+use flume::{SendError, SendTimeoutError, TrySendError};
+use crossbeam_utils::thread::scope;
+use rand::{thread_rng, Rng};
+
+fn ms(ms: u64) -> Duration {
+    Duration::from_millis(ms)
+}
+
+#[test]
+fn smoke() {
+    let (s, r) = unbounded();
+    s.try_send(7).unwrap();
+    assert_eq!(r.try_recv(), Ok(7));
+
+    s.send(8).unwrap();
+    assert_eq!(r.recv(), Ok(8));
+
+    assert_eq!(r.try_recv(), Err(TryRecvError::Empty));
+    assert_eq!(r.recv_timeout(ms(1000)), Err(RecvTimeoutError::Timeout));
+}
+
+#[test]
+fn capacity() {
+    let (s, r) = unbounded::<()>();
+    assert_eq!(s.capacity(), None);
+    assert_eq!(r.capacity(), None);
+}
+
+#[test]
+fn len_empty_full() {
+    let (s, r) = unbounded();
+
+    assert_eq!(s.len(), 0);
+    assert_eq!(s.is_empty(), true);
+    assert_eq!(s.is_full(), false);
+    assert_eq!(r.len(), 0);
+    assert_eq!(r.is_empty(), true);
+    assert_eq!(r.is_full(), false);
+
+    s.send(()).unwrap();
+
+    assert_eq!(s.len(), 1);
+    assert_eq!(s.is_empty(), false);
+    assert_eq!(s.is_full(), false);
+    assert_eq!(r.len(), 1);
+    assert_eq!(r.is_empty(), false);
+    assert_eq!(r.is_full(), false);
+
+    r.recv().unwrap();
+
+    assert_eq!(s.len(), 0);
+    assert_eq!(s.is_empty(), true);
+    assert_eq!(s.is_full(), false);
+    assert_eq!(r.len(), 0);
+    assert_eq!(r.is_empty(), true);
+    assert_eq!(r.is_full(), false);
+}
+
+#[test]
+fn try_recv() {
+    let (s, r) = unbounded();
+
+    scope(|scope| {
+        scope.spawn(move |_| {
+            assert_eq!(r.try_recv(), Err(TryRecvError::Empty));
+            thread::sleep(ms(1500));
+            assert_eq!(r.try_recv(), Ok(7));
+            thread::sleep(ms(500));
+            assert_eq!(r.try_recv(), Err(TryRecvError::Disconnected));
+        });
+        scope.spawn(move |_| {
+            thread::sleep(ms(1000));
+            s.send(7).unwrap();
+        });
+    })
+    .unwrap();
+}
+
+#[test]
+fn recv() {
+    let (s, r) = unbounded();
+
+    scope(|scope| {
+        scope.spawn(move |_| {
+            assert_eq!(r.recv(), Ok(7));
+            thread::sleep(ms(1000));
+            assert_eq!(r.recv(), Ok(8));
+            thread::sleep(ms(1000));
+            assert_eq!(r.recv(), Ok(9));
+            assert!(r.recv().is_err());
+        });
+        scope.spawn(move |_| {
+            thread::sleep(ms(1500));
+            s.send(7).unwrap();
+            s.send(8).unwrap();
+            s.send(9).unwrap();
+        });
+    })
+    .unwrap();
+}
+
+#[test]
+fn recv_timeout() {
+    let (s, r) = unbounded::<i32>();
+
+    scope(|scope| {
+        scope.spawn(move |_| {
+            assert_eq!(r.recv_timeout(ms(1000)), Err(RecvTimeoutError::Timeout));
+            assert_eq!(r.recv_timeout(ms(1000)), Ok(7));
+            assert_eq!(
+                r.recv_timeout(ms(1000)),
+                Err(RecvTimeoutError::Disconnected)
+            );
+        });
+        scope.spawn(move |_| {
+            thread::sleep(ms(1500));
+            s.send(7).unwrap();
+        });
+    })
+    .unwrap();
+}
+
+#[test]
+fn try_send() {
+    let (s, r) = unbounded();
+    for i in 0..1000 {
+        assert_eq!(s.try_send(i), Ok(()));
+    }
+
+    drop(r);
+    assert_eq!(s.try_send(777), Err(TrySendError::Disconnected(777)));
+}
+
+#[test]
+fn send() {
+    let (s, r) = unbounded();
+    for i in 0..1000 {
+        assert_eq!(s.send(i), Ok(()));
+    }
+
+    drop(r);
+    assert_eq!(s.send(777), Err(SendError(777)));
+}
+
+#[test]
+fn send_timeout() {
+    let (s, r) = unbounded();
+    for i in 0..1000 {
+        assert_eq!(s.send_timeout(i, ms(i as u64)), Ok(()));
+    }
+
+    drop(r);
+    assert_eq!(
+        s.send_timeout(777, ms(0)),
+        Err(SendTimeoutError::Disconnected(777))
+    );
+}
+
+#[test]
+fn send_after_disconnect() {
+    let (s, r) = unbounded();
+
+    s.send(1).unwrap();
+    s.send(2).unwrap();
+    s.send(3).unwrap();
+
+    drop(r);
+
+    assert_eq!(s.send(4), Err(SendError(4)));
+    assert_eq!(s.try_send(5), Err(TrySendError::Disconnected(5)));
+    assert_eq!(
+        s.send_timeout(6, ms(0)),
+        Err(SendTimeoutError::Disconnected(6))
+    );
+}
+
+#[test]
+fn recv_after_disconnect() {
+    let (s, r) = unbounded();
+
+    s.send(1).unwrap();
+    s.send(2).unwrap();
+    s.send(3).unwrap();
+
+    drop(s);
+
+    assert_eq!(r.recv(), Ok(1));
+    assert_eq!(r.recv(), Ok(2));
+    assert_eq!(r.recv(), Ok(3));
+    assert!(r.recv().is_err());
+}
+
+#[test]
+fn len() {
+    let (s, r) = unbounded();
+
+    assert_eq!(s.len(), 0);
+    assert_eq!(r.len(), 0);
+
+    for i in 0..50 {
+        s.send(i).unwrap();
+        assert_eq!(s.len(), i + 1);
+    }
+
+    for i in 0..50 {
+        r.recv().unwrap();
+        assert_eq!(r.len(), 50 - i - 1);
+    }
+
+    assert_eq!(s.len(), 0);
+    assert_eq!(r.len(), 0);
+}
+
+#[test]
+fn disconnect_wakes_receiver() {
+    let (s, r) = unbounded::<()>();
+
+    scope(|scope| {
+        scope.spawn(move |_| {
+            assert!(r.recv().is_err());
+        });
+        scope.spawn(move |_| {
+            thread::sleep(ms(1000));
+            drop(s);
+        });
+    })
+    .unwrap();
+}
+
+#[test]
+fn spsc() {
+    const COUNT: usize = 100_000;
+
+    let (s, r) = unbounded();
+
+    scope(|scope| {
+        scope.spawn(move |_| {
+            for i in 0..COUNT {
+                assert_eq!(r.recv(), Ok(i));
+            }
+            assert!(r.recv().is_err());
+        });
+        scope.spawn(move |_| {
+            for i in 0..COUNT {
+                s.send(i).unwrap();
+            }
+        });
+    })
+    .unwrap();
+}
+
+#[test]
+fn mpmc() {
+    const COUNT: usize = 25_000;
+    const THREADS: usize = 4;
+
+    let (s, r) = unbounded::<usize>();
+    let v = (0..COUNT).map(|_| AtomicUsize::new(0)).collect::<Vec<_>>();
+
+    scope(|scope| {
+        for _ in 0..THREADS {
+            scope.spawn(|_| {
+                for _ in 0..COUNT {
+                    let n = r.recv().unwrap();
+                    v[n].fetch_add(1, Ordering::SeqCst);
+                }
+            });
+        }
+        for _ in 0..THREADS {
+            scope.spawn(|_| {
+                for i in 0..COUNT {
+                    s.send(i).unwrap();
+                }
+            });
+        }
+    })
+    .unwrap();
+
+    assert_eq!(r.try_recv(), Err(TryRecvError::Empty));
+
+    for c in v {
+        assert_eq!(c.load(Ordering::SeqCst), THREADS);
+    }
+}
+
+#[test]
+fn stress_oneshot() {
+    const COUNT: usize = 10_000;
+
+    for _ in 0..COUNT {
+        let (s, r) = unbounded();
+
+        scope(|scope| {
+            scope.spawn(|_| r.recv().unwrap());
+            scope.spawn(|_| s.send(0).unwrap());
+        })
+        .unwrap();
+    }
+}
+
+#[test]
+fn stress_iter() {
+    const COUNT: usize = 100_000;
+
+    let (request_s, request_r) = unbounded();
+    let (response_s, response_r) = unbounded();
+
+    scope(|scope| {
+        scope.spawn(move |_| {
+            let mut count = 0;
+            loop {
+                for x in response_r.try_iter() {
+                    count += x;
+                    if count == COUNT {
+                        return;
+                    }
+                }
+                request_s.send(()).unwrap();
+            }
+        });
+
+        for _ in request_r.iter() {
+            if response_s.send(1).is_err() {
+                break;
+            }
+        }
+    })
+    .unwrap();
+}
+
+#[test]
+fn stress_timeout_two_threads() {
+    const COUNT: usize = 100;
+
+    let (s, r) = unbounded();
+
+    scope(|scope| {
+        scope.spawn(|_| {
+            for i in 0..COUNT {
+                if i % 2 == 0 {
+                    thread::sleep(ms(50));
+                }
+                s.send(i).unwrap();
+            }
+        });
+
+        scope.spawn(|_| {
+            for i in 0..COUNT {
+                if i % 2 == 0 {
+                    thread::sleep(ms(50));
+                }
+                loop {
+                    if let Ok(x) = r.recv_timeout(ms(10)) {
+                        assert_eq!(x, i);
+                        break;
+                    }
+                }
+            }
+        });
+    })
+    .unwrap();
+}
+
+#[test]
+fn drops() {
+    static DROPS: AtomicUsize = AtomicUsize::new(0);
+
+    #[derive(Debug, PartialEq)]
+    struct DropCounter;
+
+    impl Drop for DropCounter {
+        fn drop(&mut self) {
+            DROPS.fetch_add(1, Ordering::SeqCst);
+        }
+    }
+
+    let mut rng = thread_rng();
+
+    for _ in 0..100 {
+        let steps = rng.gen_range(0..10_000);
+        let additional = rng.gen_range(0..1000);
+
+        DROPS.store(0, Ordering::SeqCst);
+        let (s, r) = unbounded::<DropCounter>();
+
+        scope(|scope| {
+            scope.spawn(|_| {
+                for _ in 0..steps {
+                    r.recv().unwrap();
+                }
+            });
+
+            scope.spawn(|_| {
+                for _ in 0..steps {
+                    s.send(DropCounter).unwrap();
+                }
+            });
+        })
+        .unwrap();
+
+        for _ in 0..additional {
+            s.try_send(DropCounter).unwrap();
+        }
+
+        assert_eq!(DROPS.load(Ordering::SeqCst), steps);
+        drop(s);
+        drop(r);
+        assert_eq!(DROPS.load(Ordering::SeqCst), steps + additional);
+    }
+}
+
+#[test]
+fn linearizable() {
+    const COUNT: usize = 25_000;
+    const THREADS: usize = 4;
+
+    let (s, r) = unbounded();
+
+    scope(|scope| {
+        for _ in 0..THREADS {
+            scope.spawn(|_| {
+                for _ in 0..COUNT {
+                    s.send(0).unwrap();
+                    r.try_recv().unwrap();
+                }
+            });
+        }
+    })
+    .unwrap();
+}
+
+// #[test]
+// fn fairness() {
+//     const COUNT: usize = 10_000;
+
+//     let (s1, r1) = unbounded::<()>();
+//     let (s2, r2) = unbounded::<()>();
+
+//     for _ in 0..COUNT {
+//         s1.send(()).unwrap();
+//         s2.send(()).unwrap();
+//     }
+
+//     let mut hits = [0usize; 2];
+//     for _ in 0..COUNT {
+//         select! {
+//             recv(r1) -> _ => hits[0] += 1,
+//             recv(r2) -> _ => hits[1] += 1,
+//         }
+//     }
+//     assert!(hits.iter().all(|x| *x >= COUNT / hits.len() / 2));
+// }
+
+// #[test]
+// fn fairness_duplicates() {
+//     const COUNT: usize = 10_000;
+
+//     let (s, r) = unbounded();
+
+//     for _ in 0..COUNT {
+//         s.send(()).unwrap();
+//     }
+
+//     let mut hits = [0usize; 5];
+//     for _ in 0..COUNT {
+//         select! {
+//             recv(r) -> _ => hits[0] += 1,
+//             recv(r) -> _ => hits[1] += 1,
+//             recv(r) -> _ => hits[2] += 1,
+//             recv(r) -> _ => hits[3] += 1,
+//             recv(r) -> _ => hits[4] += 1,
+//         }
+//     }
+//     assert!(hits.iter().all(|x| *x >= COUNT / hits.len() / 2));
+// }
+
+// #[test]
+// fn recv_in_send() {
+//     let (s, r) = unbounded();
+//     s.send(()).unwrap();
+
+//     select! {
+//         send(s, assert_eq!(r.recv(), Ok(()))) -> _ => {}
+//     }
+// }
+
+#[test]
+fn channel_through_channel() {
+    const COUNT: usize = 1000;
+
+    type T = Box<dyn Any + Send>;
+
+    let (s, r) = unbounded::<T>();
+
+    scope(|scope| {
+        scope.spawn(move |_| {
+            let mut s = s;
+
+            for _ in 0..COUNT {
+                let (new_s, new_r) = unbounded();
+                let new_r: T = Box::new(Some(new_r));
+
+                s.send(new_r).unwrap();
+                s = new_s;
+            }
+        });
+
+        scope.spawn(move |_| {
+            let mut r = r;
+
+            for _ in 0..COUNT {
+                r = r
+                    .recv()
+                    .unwrap()
+                    .downcast_mut::<Option<Receiver<T>>>()
+                    .unwrap()
+                    .take()
+                    .unwrap()
+            }
+        });
+    })
+    .unwrap();
+}