From d5f785bd7eecc581cf53495a7d1903c9df106693 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Sat, 12 Apr 2025 17:13:17 -0400
Subject: [PATCH] add a failing test

---
 .../samples/state-onchange-child/_config.js         | 11 +++++++++++
 .../samples/state-onchange-child/main.svelte        | 13 +++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 packages/svelte/tests/runtime-runes/samples/state-onchange-child/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/state-onchange-child/main.svelte

diff --git a/packages/svelte/tests/runtime-runes/samples/state-onchange-child/_config.js b/packages/svelte/tests/runtime-runes/samples/state-onchange-child/_config.js
new file mode 100644
index 0000000000..76380eddc9
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/state-onchange-child/_config.js
@@ -0,0 +1,11 @@
+import { flushSync } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	async test({ assert, target, logs }) {
+		const btn = target.querySelector('button');
+
+		flushSync(() => btn?.click());
+		assert.deepEqual(logs, ['b changed']);
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/state-onchange-child/main.svelte b/packages/svelte/tests/runtime-runes/samples/state-onchange-child/main.svelte
new file mode 100644
index 0000000000..e1f6093422
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/state-onchange-child/main.svelte
@@ -0,0 +1,13 @@
+<script>
+	let a = $state({});
+
+	let b = $state({ count: 0 }, {
+		onchange() {
+			console.log('b changed');
+		}
+	});
+
+	a.b = b;
+</script>
+
+<button onclick={()=> b.count++}>{b.count}</button>