tests

test/runtime/samples/action-update-this/_config.js

@@ -0,0 +1,15 @@
+export default {
+	props: { text: "first" },
+	test({ assert, target, component }) {
+		assert.htmlEqual(target.innerHTML, "<button>first</button>");
+		component.text = "second";
+		assert.htmlEqual(target.innerHTML, "<button>second</button>");
+		let last_text;
+		component.text = "third";
+		component.on_destroy = (text) => {
+			last_text = text;
+		};
+		component.$destroy();
+		assert.equal(last_text, "third");
+	},
+};

test/runtime/samples/action-update-this/main.svelte

@@ -0,0 +1,18 @@
+<script>
+	export let on_destroy;
+	export let text;
+	function tooltip(node, text) {
+		node.textContent = text;
+		return {
+			node,
+			update(text) {
+				this.node.textContent = text;
+			},
+			destroy() {
+				on_destroy(this.node.textContent);
+			},
+		};
+	}
+</script>
+
+<button use:tooltip={text} />