Function call_wrapped_async_func

tests/all/call_hook.rs:118–169

()

// Create an async Func, call it directly:
#[tokio::test]
async fn call_wrapped_async_func() -> Result<(), Error> {
    let engine = Engine::default();
    let mut store = Store::new(&engine, State::default());
    store.call_hook(sync_call_hook);
    let f = Func::wrap_async(
        &mut store,
        |caller: Caller<State>, (a, b, c, d): (i32, i64, f32, f64)| {
            Box::new(async move {
                // Calling this func will switch context into wasm, then back to host:
                assert_eq!(caller.data().context, vec![Context::Wasm, Context::Host]);

                assert_eq!(
                    caller.data().calls_into_host,
                    caller.data().returns_from_host + 1
                );
                assert_eq!(
                    caller.data().calls_into_wasm,
                    caller.data().returns_from_wasm + 1
                );

                assert_eq!(a, 1);
                assert_eq!(b, 2);
                assert_eq!(c, 3.0);
                assert_eq!(d, 4.0);
            })
        },
    );

    f.call_async(
        &mut store,
        &[Val::I32(1), Val::I64(2), 3.0f32.into(), 4.0f64.into()],
        &mut [],
    )
    .await?;

    // One switch from vm to host to call f, another in return from f.
    assert_eq!(store.data().calls_into_host, 1);
    assert_eq!(store.data().returns_from_host, 1);
    assert_eq!(store.data().calls_into_wasm, 1);
    assert_eq!(store.data().returns_from_wasm, 1);

    f.typed::<(i32, i64, f32, f64), ()>(&store)?
        .call_async(&mut store, (1, 2, 3.0, 4.0))
        .await?;

    assert_eq!(store.data().calls_into_host, 2);
    assert_eq!(store.data().returns_from_host, 2);
    assert_eq!(store.data().calls_into_wasm, 2);
    assert_eq!(store.data().returns_from_wasm, 2);

    Ok(())
}

// Use the Linker to define a sync func, call it through WebAssembly:
#[test]