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//! Tests for iteration over receivers.
use crossbeam_channel::unbounded;
use crossbeam_utils::thread::scope;
#[test]
fn nested_recv_iter() {
let (s, r) = unbounded::<i32>();
let (total_s, total_r) = unbounded::<i32>();
scope(|scope| {
scope.spawn(move |_| {
let mut acc = 0;
for x in r.iter() {
acc += x;
}
total_s.send(acc).unwrap();
});
s.send(3).unwrap();
s.send(1).unwrap();
s.send(2).unwrap();
drop(s);
assert_eq!(total_r.recv().unwrap(), 6);
})
.unwrap();
}
#[test]
fn recv_iter_break() {
let (s, r) = unbounded::<i32>();
let (count_s, count_r) = unbounded();
scope(|scope| {
scope.spawn(move |_| {
let mut count = 0;
for x in r.iter() {
if count >= 3 {
break;
} else {
count += x;
}
}
count_s.send(count).unwrap();
});
s.send(2).unwrap();
s.send(2).unwrap();
s.send(2).unwrap();
let _ = s.send(2);
drop(s);
assert_eq!(count_r.recv().unwrap(), 4);
})
.unwrap();
}
#[test]
fn recv_try_iter() {
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 == 6 {
return;
}
}
request_s.send(()).unwrap();
}
});
for _ in request_r.iter() {
if response_s.send(2).is_err() {
break;
}
}
})
.unwrap();
}
#[test]
fn recv_into_iter_owned() {
let mut iter = {
let (s, r) = unbounded::<i32>();
s.send(1).unwrap();
s.send(2).unwrap();
r.into_iter()
};
assert_eq!(iter.next().unwrap(), 1);
assert_eq!(iter.next().unwrap(), 2);
assert!(iter.next().is_none());
}
#[test]
fn recv_into_iter_borrowed() {
let (s, r) = unbounded::<i32>();
s.send(1).unwrap();
s.send(2).unwrap();
drop(s);
let mut iter = (&r).into_iter();
assert_eq!(iter.next().unwrap(), 1);
assert_eq!(iter.next().unwrap(), 2);
assert!(iter.next().is_none());
}
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