add test

packages/svelte/tests/runtime-runes/samples/non-local-mutation-with-binding-7/Component.svelte

@@ -0,0 +1,7 @@
+<script>
+	let { object = $bindable() } = $props();
+</script>
+
+<button onclick={() => object.count += 1}>
+	clicks: {object.count}
+</button>

packages/svelte/tests/runtime-runes/samples/non-local-mutation-with-binding-7/_config.js

@@ -0,0 +1,13 @@
+import { test } from '../../test';
+
+export default test({
+	html: `<button>clicks: 0</button>`,
+
+	compileOptions: {
+		dev: true
+	},
+
+	warnings: [
+		"The `object` prop was passed an object that isn't reactive yet was marked as bindable. The object should be either made reactive using `$state` or should contain properties that have a `set` accessor."
+	]
+});

packages/svelte/tests/runtime-runes/samples/non-local-mutation-with-binding-7/main.svelte

@@ -0,0 +1,5 @@
+<script>
+	import Component from './Component.svelte';
+</script>
+
+<Component object={{ count: 0 }} />