fn test_channel_try_buffered() {
    ch := chan int{cap: 5}
    for z in 2 .. 13 {
        if ch.try_push(z) == .not_ready {
            assert z == 7
            break
        }
    }
    mut obj := int(0)
    for ch.try_pop(mut obj) == .success {
        println(obj)
    }
    assert obj == 6
    ch <- 17
    obj = <-ch
    assert obj == 17
}