//! What a background task can change, and how it gets back to the ui.

use std::time::Duration;

use iris::harness::Harness;
use iris::prelude::*;

#[test]
fn a_task_update_reaches_the_tree() {
    let mut h = Harness::new((400, 200));
    let widget = rect(Color::RED).add(&mut h.rsc);
    h.set_root(widget.task_on(CursorSense::click(), async move |mut ctx| {
        ctx.update(move |_, rsc| widget(rsc).color = Color::BLUE);
    }));

    h.click((200, 100));

    assert!(
        h.await_update(Duration::from_secs(5)),
        "the task sent no update"
    );
    assert_eq!(h.rsc[widget].color, Color::BLUE);
}