add another test case

test/runtime/samples/key-block-3/_config.js

@@ -0,0 +1,11 @@
+// key is not used in the template
+export default {
+	html: `<div></div>`,
+	async test({ assert, component, target, window }) {
+		const div = target.querySelector('div');
+
+		component.value = 5;
+		assert.htmlEqual(target.innerHTML, `<div></div>`);
+		assert.notStrictEqual(div, target.querySelector('div'));
+	}
+};

test/runtime/samples/key-block-3/main.svelte

@@ -0,0 +1,7 @@
+<script>
+	export let value = 0;
+</script>
+
+{#key value}
+	<div />
+{/key}