// extern crate crossbeam_channel;

// use std::time::Duration;

// use crossbeam_channel::{after, bounded, never, tick, unbounded};

// fn ms(ms: u64) -> Duration {
//     Duration::from_millis(ms)
// }

// #[test]
// fn after_same_channel() {
//     let r = after(ms(50));

//     let r2 = r.clone();
//     assert!(r.same_channel(&r2));

//     let r3 = after(ms(50));
//     assert!(!r.same_channel(&r3));
//     assert!(!r2.same_channel(&r3));

//     let r4 = after(ms(100));
//     assert!(!r.same_channel(&r4));
//     assert!(!r2.same_channel(&r4));
// }

// #[test]
// fn array_same_channel() {
//     let (s, r) = bounded::<usize>(1);

//     let s2 = s.clone();
//     assert!(s.same_channel(&s2));

//     let r2 = r.clone();
//     assert!(r.same_channel(&r2));

//     let (s3, r3) = bounded::<usize>(1);
//     assert!(!s.same_channel(&s3));
//     assert!(!s2.same_channel(&s3));
//     assert!(!r.same_channel(&r3));
//     assert!(!r2.same_channel(&r3));
// }

// #[test]
// fn list_same_channel() {
//     let (s, r) = unbounded::<usize>();

//     let s2 = s.clone();
//     assert!(s.same_channel(&s2));

//     let r2 = r.clone();
//     assert!(r.same_channel(&r2));

//     let (s3, r3) = unbounded::<usize>();
//     assert!(!s.same_channel(&s3));
//     assert!(!s2.same_channel(&s3));
//     assert!(!r.same_channel(&r3));
//     assert!(!r2.same_channel(&r3));
// }

// #[test]
// fn never_same_channel() {
//     let r = never::<usize>();

//     let r2 = r.clone();
//     assert!(r.same_channel(&r2));

//     // Never channel are always equal to one another.
//     let r3 = never::<usize>();
//     assert!(r.same_channel(&r3));
//     assert!(r2.same_channel(&r3));
// }

// #[test]
// fn tick_same_channel() {
//     let r = tick(ms(50));

//     let r2 = r.clone();
//     assert!(r.same_channel(&r2));

//     let r3 = tick(ms(50));
//     assert!(!r.same_channel(&r3));
//     assert!(!r2.same_channel(&r3));

//     let r4 = tick(ms(100));
//     assert!(!r.same_channel(&r4));
//     assert!(!r2.same_channel(&r4));
// }

// #[test]
// fn zero_same_channel() {
//     let (s, r) = bounded::<usize>(0);

//     let s2 = s.clone();
//     assert!(s.same_channel(&s2));

//     let r2 = r.clone();
//     assert!(r.same_channel(&r2));

//     let (s3, r3) = bounded::<usize>(0);
//     assert!(!s.same_channel(&s3));
//     assert!(!s2.same_channel(&s3));
//     assert!(!r.same_channel(&r3));
//     assert!(!r2.same_channel(&r3));
// }

// #[test]
// fn different_flavors_same_channel() {
//     let (s1, r1) = bounded::<usize>(0);
//     let (s2, r2) = unbounded::<usize>();

//     assert!(!s1.same_channel(&s2));
//     assert!(!r1.same_channel(&r2));
// }