Function record_derive

tests/all/component_model/macros.rs:10–124

()

#[test]
fn record_derive() -> Result<()> {
    #[derive(ComponentType, Lift, Lower, PartialEq, Eq, Debug, Copy, Clone)]
    #[component(record)]
    struct Foo {
        #[component(name = "foo-bar-baz")]
        a: i32,
        b: u32,
    }

    let engine = super::engine();
    let mut store = Store::new(&engine, ());

    // Happy path: component type matches field count, names, and types

    let component = Component::new(
        &engine,
        make_echo_component(r#"(record (field "foo-bar-baz" s32) (field "b" u32))"#, 8),
    )?;
    let instance = Linker::new(&engine).instantiate(&mut store, &component)?;

    let input = Foo { a: -42, b: 73 };
    let output = instance
        .get_typed_func::<(Foo,), (Foo,)>(&mut store, "echo")?
        .call(&mut store, (input,))?;

    assert_eq!((input,), output);

    // Sad path: field count mismatch (too few)

    let component = Component::new(
        &engine,
        make_echo_component(r#"(record (field "foo-bar-baz" s32))"#, 4),
    )?;
    let instance = Linker::new(&engine).instantiate(&mut store, &component)?;

    assert!(
        instance
            .get_typed_func::<(Foo,), (Foo,)>(&mut store, "echo")
            .is_err()
    );

    // Sad path: field count mismatch (too many)

    let component = Component::new(
        &engine,
        make_echo_component(
            r#"(record (field "foo-bar-baz" s32) (field "b" u32) (field "c" u32))"#,
            12,
        ),
    )?;
    let instance = Linker::new(&engine).instantiate(&mut store, &component)?;

    assert!(
        instance
            .get_typed_func::<(Foo,), (Foo,)>(&mut store, "echo")
            .is_err()
    );