dfir_rs 0.16.0

DFIR runtime for Rust, used by Hydro.
Documentation 
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use dfir_rs::scheduled::ticks::TickInstant;
use dfir_rs::util::collect_ready;
use dfir_rs::{assert_graphvis_snapshots, dfir_syntax};
use multiplatform_test::multiplatform_test;

#[multiplatform_test]
pub fn test_reduce_tick() {
    let (items_send, items_recv) = dfir_rs::util::unbounded_channel::<u32>();
    let (result_send, mut result_recv) = dfir_rs::util::unbounded_channel::<u32>();

    let mut df = dfir_rs::dfir_syntax! {
        source_stream(items_recv)
            -> reduce::<'tick>(|acc: &mut u32, next: u32| *acc += next)
            -> for_each(|v| result_send.send(v).unwrap());
    };
    assert_graphvis_snapshots!(df);
    assert_eq!(TickInstant::new(0), df.current_tick());

    items_send.send(1).unwrap();
    items_send.send(2).unwrap();
    df.run_tick_sync();

    assert_eq!(TickInstant::new(1), df.current_tick());
    assert_eq!(&[3], &*collect_ready::<Vec<_>, _>(&mut result_recv));

    items_send.send(3).unwrap();
    items_send.send(4).unwrap();
    df.run_tick_sync();

    assert_eq!(TickInstant::new(2), df.current_tick());
    assert_eq!(&[7], &*collect_ready::<Vec<_>, _>(&mut result_recv));
}

#[multiplatform_test]
pub fn test_reduce_static() {
    let (items_send, items_recv) = dfir_rs::util::unbounded_channel::<u32>();
    let (result_send, mut result_recv) = dfir_rs::util::unbounded_channel::<u32>();

    let mut df = dfir_rs::dfir_syntax! {
        source_stream(items_recv)
            -> reduce::<'static>(|acc: &mut u32, next: u32| *acc += next)
            -> for_each(|v| result_send.send(v).unwrap());
    };
    assert_graphvis_snapshots!(df);
    assert_eq!(TickInstant::new(0), df.current_tick());

    items_send.send(1).unwrap();
    items_send.send(2).unwrap();
    df.run_tick_sync();

    assert_eq!(TickInstant::new(1), df.current_tick());
    assert_eq!(&[3], &*collect_ready::<Vec<_>, _>(&mut result_recv));

    items_send.send(3).unwrap();
    items_send.send(4).unwrap();
    df.run_tick_sync();

    assert_eq!(TickInstant::new(2), df.current_tick());
    assert_eq!(&[10], &*collect_ready::<Vec<_>, _>(&mut result_recv));
}

#[multiplatform_test]
pub fn test_reduce_sum() {
    let (items_send, items_recv) = dfir_rs::util::unbounded_channel::<usize>();

    let mut df = dfir_syntax! {
        source_stream(items_recv)
            -> reduce(|a: &mut _, b| *a += b)
            -> for_each(|v| print!("{:?}", v));
    };
    assert_graphvis_snapshots!(df);
    assert_eq!(TickInstant::new(0), df.current_tick());
    df.run_tick_sync();
    assert_eq!(TickInstant::new(1), df.current_tick());

    print!("\nA: ");

    items_send.send(9).unwrap();
    items_send.send(2).unwrap();
    items_send.send(5).unwrap();
    df.run_tick_sync();
    assert_eq!(TickInstant::new(2), df.current_tick());

    print!("\nB: ");

    items_send.send(9).unwrap();
    items_send.send(5).unwrap();
    items_send.send(2).unwrap();
    items_send.send(0).unwrap();
    items_send.send(3).unwrap();
    df.run_tick_sync();
    assert_eq!(TickInstant::new(3), df.current_tick());

    println!();
}

// TODO(inline): uses intra-tick cycles, not supported in inline codegen
// /// This tests graph reachability along with an accumulation (in this case sum of vertex ids).
// /// This is to test fixed-point being reched before the accumulation running.
// #[multiplatform_test]
// pub fn test_reduce() {
//     // An edge in the input data = a pair of `usize` vertex IDs.
//     let (pairs_send, pairs_recv) = dfir_rs::util::unbounded_channel::<(usize, usize)>();
//
//     let mut df = dfir_syntax! {
//         reached_vertices = union() -> map(|v| (v, ()));
//         source_iter(vec![0]) -> [0]reached_vertices;
//
//         my_join_tee = join() -> map(|(_src, ((), dst))| dst) -> tee();
//         reached_vertices -> [0]my_join_tee;
//         source_stream(pairs_recv) -> [1]my_join_tee;
//
//         my_join_tee[0] -> [1]reached_vertices;
//         my_join_tee[1] -> reduce(|a: &mut _, b| *a += b) -> for_each(|sum| println!("{}", sum));
//     };
//     assert_graphvis_snapshots!(df);
//     assert_eq!(
//         (TickInstant::new(0), 0),
//         (df.current_tick(), df.current_stratum())
//     );
//     df.run_tick_sync();
//     assert_eq!(
//         (TickInstant::new(1), 0),
//         (df.current_tick(), df.current_stratum())
//     );
//
//     println!("A");
//
//     pairs_send.send((0, 1)).unwrap();
//     pairs_send.send((2, 4)).unwrap();
//     pairs_send.send((3, 4)).unwrap();
//     pairs_send.send((1, 2)).unwrap();
//     df.run_tick_sync();
//     assert_eq!(
//         (TickInstant::new(2), 0),
//         (df.current_tick(), df.current_stratum())
//     );
//
//     println!("B");
//
//     pairs_send.send((0, 3)).unwrap();
//     pairs_send.send((0, 3)).unwrap();
//     df.run_tick_sync();
//     assert_eq!(
//         (TickInstant::new(3), 0),
//         (df.current_tick(), df.current_stratum())
//     );
// }

// TODO(inline): uses loop {} blocks, not supported in inline codegen
// #[test]
// fn test_reduce_loop_lifetime() {
//     let (result1_send, mut result1_recv) = dfir_rs::util::unbounded_channel::<_>();
//     let (result2_send, mut result2_recv) = dfir_rs::util::unbounded_channel::<_>();
//
//     let mut df = dfir_syntax! {
//         a = source_iter(0..10);
//         loop {
//             b = a -> batch() -> tee();
//             loop {
//                 b -> repeat_n(5)
//                     -> reduce::<'none>(|old: &mut _, val| {
//                         *old += val;
//                     })
//                     -> for_each(|v| result1_send.send(v).unwrap());
//
//                 b -> repeat_n(5)
//                     -> reduce::<'loop>(|old: &mut _, val| {
//                         *old += val;
//                     })
//                     -> for_each(|v| result2_send.send(v).unwrap());
//             };
//         };
//     };
//     df.run_available_sync();
//
//     // `'none` resets each iteration.
//     assert_eq!(
//         &[45, 45, 45, 45, 45],
//         &*collect_ready::<Vec<_>, _>(&mut result1_recv)
//     );
//     // `'loop` accumulates across iterations.
//     assert_eq!(
//         &[45, 90, 135, 180, 225],
//         &*collect_ready::<Vec<_>, _>(&mut result2_recv)
//     );
// }