each test

packages/svelte/tests/runtime-runes/samples/async-each/_config.js

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+import { tick } from 'svelte';
+import { deferred } from '../../../../src/internal/shared/utils.js';
+import { test } from '../../test';
+
+/** @type {ReturnType<typeof deferred>} */
+let d;
+
+export default test({
+	html: `<p>pending</p>`,
+
+	get props() {
+		d = deferred();
+
+		return {
+			promise: d.promise
+		};
+	},
+
+	async test({ assert, target, component }) {
+		d.resolve(['a', 'b', 'c']);
+		await Promise.resolve();
+		await Promise.resolve();
+		await Promise.resolve();
+		await tick();
+		assert.htmlEqual(target.innerHTML, '<p>a</p><p>b</p><p>c</p>');
+
+		d = deferred();
+		component.promise = d.promise;
+		await tick();
+		assert.htmlEqual(target.innerHTML, '<p>pending</p>');
+
+		d.resolve(['d', 'e', 'f']);
+		await Promise.resolve();
+		await tick();
+		assert.htmlEqual(target.innerHTML, '<p>d</p><p>e</p><p>f</p>');
+	}
+});

packages/svelte/tests/runtime-runes/samples/async-each/main.svelte

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+<script>
+	let { promise } = $props();
+</script>
+
+<svelte:boundary>
+	{#each await promise as item}
+		<p>{item}</p>
+	{/each}
+
+	{#snippet pending()}
+		<p>pending</p>
+	{/snippet}
+</svelte:boundary>