add test

packages/svelte/tests/runtime-runes/samples/effect-root-3/_config.js

@@ -0,0 +1,28 @@
+import { flushSync } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	async test({ assert, target, logs }) {
+		const [b1, b2, b3] = target.querySelectorAll('button');
+
+		flushSync(() => {
+			b1.click();
+			b2.click();
+		});
+
+		assert.deepEqual(logs, [0, 1]);
+
+		flushSync(() => {
+			b3.click();
+		});
+
+		assert.deepEqual(logs, [0, 1, 'cleanup 1', 'cleanup 2']);
+
+		flushSync(() => {
+			b1.click();
+			b2.click();
+		});
+
+		assert.deepEqual(logs, [0, 1, 'cleanup 1', 'cleanup 2']);
+	}
+});

packages/svelte/tests/runtime-runes/samples/effect-root-3/main.svelte

@@ -0,0 +1,11 @@
+<script>
+	import { with_root } from './root.svelte.js';
+	let x = $state(0);
+	let y = $state(0);
+
+	const cleanup = with_root(() => x)
+</script>
+
+<button onclick={() => x++}>{x}</button>
+<button onclick={() => y++}>{y}</button>
+<button onclick={cleanup}>cleanup</button>

packages/svelte/tests/runtime-runes/samples/effect-root-3/root.svelte.js

@@ -0,0 +1,20 @@
+export function with_root(get_x) {
+	const cleanup = $effect.root(() => {
+		$effect(() => {
+			console.log(get_x());
+		});
+
+		const nested_cleanup = $effect.root(() => {
+			return () => {
+				console.log('cleanup 2');
+			};
+		});
+
+		return () => {
+			console.log('cleanup 1');
+			nested_cleanup();
+		};
+	});
+
+	return cleanup;
+}