add another another failing test

Author: tombl

src/client/tests/renderable.test.ts

@@ -605,3 +605,33 @@ test('invalidating grandparent during child render triggers update', () => {
 	invalidate(middle)
 	assert_eq(el.innerHTML, 'loading')
 })
+
+test('invalidating parent during child render when reusing renderable keeps child stale', () => {
+	const { root, el } = setup()
+
+	const parent = {
+		render() {
+			return child
+		},
+	}
+
+	const child = {
+		stage: 'initial',
+		did_invalidate: false,
+
+		render() {
+			const output = this.stage
+
+			if (!this.did_invalidate) {
+				this.did_invalidate = true
+				this.stage = 'updated'
+				invalidate(parent)
+			}
+
+			return output
+		},
+	}
+
+	root.render(parent)
+	assert_eq(el.innerHTML, 'updated')
+})