add async-effect-after-await test

Author: Rich-Harris

packages/svelte/tests/runtime-runes/samples/async-effect-after-await/Child.svelte

@@ -0,0 +1,7 @@
+<script>
+	await 1;
+
+	$effect(() => {
+		console.log('hello');
+	});
+</script>

packages/svelte/tests/runtime-runes/samples/async-effect-after-await/_config.js

@@ -0,0 +1,9 @@
+import { tick } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	async test({ assert, logs }) {
+		await tick();
+		assert.deepEqual(logs, ['hello']);
+	}
+});

packages/svelte/tests/runtime-runes/samples/async-effect-after-await/main.svelte

@@ -0,0 +1,9 @@
+<script>
+	import Child from './Child.svelte';
+</script>
+
+<svelte:boundary>
+	<Child />
+
+	{#snippet pending()}{/snippet}
+</svelte:boundary>