sigmut 0.0.2

a state management framework designed to be used as a foundation for UI frameworks.
Documentation 
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use std::future::pending;

use assert_call::{call, CallRecorder};

use crate::{core::Runtime, effect_async, utils::test_helpers::call_on_drop, State};

#[test]
fn test_effect_async() {
    let mut rt = Runtime::new();
    let mut cr = CallRecorder::new();
    let s = State::new(10);

    let e = effect_async({
        let s = s.to_signal();
        move |mut sc| {
            let s = s.clone();
            async move { call!("{}", sc.with(|sc| s.get(sc))) }
        }
    });
    cr.verify(());

    rt.update();
    cr.verify("10");

    rt.update();
    cr.verify(()); // not called again because state did not change

    s.set(20, rt.ac());
    rt.update();
    cr.verify("20"); // called again because state changed

    s.set(30, rt.ac());
    drop(e);
    cr.verify(()); // not called again because effect was dropped
}

#[test]
fn cancel_on_changed() {
    let mut rt = Runtime::new();

    let mut cr = CallRecorder::new();
    let s = State::new(10);

    let _e = effect_async({
        let s = s.to_signal();
        move |mut sc| {
            let s = s.clone();
            async move {
                let value = sc.with(|sc| s.get(sc));
                let _on_drop = call_on_drop(format!("drop_{value}"));
                call!("{value}");
                pending::<()>().await;
            }
        }
    });
    cr.verify(());

    rt.update();
    cr.verify("10");

    rt.update();
    cr.verify(()); // not called again because state did not change

    s.set(20, rt.ac());
    rt.update();
    cr.verify(["drop_10", "20"]); // called again because state changed
}

#[test]
fn cancel_on_drop() {
    let mut rt = Runtime::new();

    let mut cr = CallRecorder::new();
    let s = State::new(10);

    let e = effect_async({
        let s = s.to_signal();
        move |mut sc| {
            let s = s.clone();
            async move {
                let value = sc.with(|sc| s.get(sc));
                let _on_drop = call_on_drop(format!("drop_{value}"));
                call!("{value}");
                pending::<()>().await;
            }
        }
    });
    cr.verify(());

    rt.update();
    cr.verify("10");

    drop(e);
    cr.verify("drop_10");
}