test

Author: Rich-Harris

packages/svelte/tests/runtime-runes/samples/each-keyed-child-effect/_config.js

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+import { flushSync } from 'svelte';
+import { ok, test } from '../../test';
+
+let ascending = `
+<button>reverse</button>
+<p>1</p>
+<p>(1)</p>
+<p>2</p>
+<p>(2)</p>
+<p>3</p>
+<p>(3)</p>
+`;
+
+let descending = `
+<button>reverse</button>
+<p>3</p>
+<p>(3)</p>
+<p>2</p>
+<p>(2)</p>
+<p>1</p>
+<p>(1)</p>
+`;
+
+export default test({
+	html: ascending,
+
+	async test({ assert, target }) {
+		const btn = target.querySelector('button');
+		ok(btn);
+
+		flushSync(() => btn.click());
+		assert.htmlEqual(target.innerHTML, descending);
+
+		flushSync(() => btn.click());
+		assert.htmlEqual(target.innerHTML, ascending);
+
+		flushSync(() => btn.click());
+		assert.htmlEqual(target.innerHTML, descending);
+
+		flushSync(() => btn.click());
+		assert.htmlEqual(target.innerHTML, ascending);
+	}
+});

packages/svelte/tests/runtime-runes/samples/each-keyed-child-effect/main.svelte

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+<script>
+	let array = $state([1, 2, 3]);
+</script>
+
+<button onclick={() => array.reverse()}>reverse</button>
+
+{#each array as item (item)}
+	<p>{item}</p>
+	{#if true}
+		<p>({item})</p>
+	{/if}
+{/each}