1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
|
use async_recursion::async_recursion;
use futures_executor::block_on;
#[async_recursion]
async fn fib(n: u32) -> u64 {
match n {
0 => panic!("zero is not a valid argument to fib()!"),
1 | 2 => 1,
3 => 2,
_ => fib(n - 1).await + fib(n - 2).await,
}
}
#[test]
fn fibonacci_example_works() {
block_on(async move {
assert_eq!(fib(3).await, 2);
assert_eq!(fib(4).await, 3);
assert_eq!(fib(5).await, 5);
assert_eq!(fib(6).await, 8);
});
}
#[test]
fn fibonacci_example_is_send() {
fn assert_is_send(_: impl Send) {}
assert_is_send(fib(6));
}
|