Function call_wrapped_async_func

tests/all/component_model/call_hook.rs:186–246

()

// Create an async Func, call it directly:
#[tokio::test]
async fn call_wrapped_async_func() -> Result<()> {
    let wat = r#"
        (component
            (import "f" (func $f))

            (core func $f_lower
                (canon lower (func $f))
            )
            (core module $m
                (import "" "" (func $f))

                (func $export
                    (call $f)
                )

                (export "export" (func $export))
            )
            (core instance $i (instantiate $m
                (with "" (instance
                    (export "" (func $f_lower))
                ))
            ))
            (func (export "export")
                (canon lift
                    (core func $i "export")
                )
            )
        )
    "#;

    let engine = Engine::default();

    let component = Component::new(&engine, wat)?;

    let mut linker = Linker::<State>::new(&engine);
    linker
        .root()
        .func_wrap_async("f", |_, _: ()| Box::new(async { Ok(()) }))?;

    let mut store = Store::new(&engine, State::default());
    store.call_hook(sync_call_hook);

    let inst = linker
        .instantiate_async(&mut store, &component)
        .await
        .expect("instantiate");

    let export = inst
        .get_typed_func::<(), ()>(&mut store, "export")
        .expect("looking up `export`");

    export.call_async(&mut store, ()).await?;

    let s = store.into_data();
    assert_eq!(s.calls_into_host, 1);
    assert_eq!(s.returns_from_host, 1);
    assert_eq!(s.calls_into_wasm, 1);
    assert_eq!(s.returns_from_wasm, 1);