shared api for tests

packages/aria-voyager/tests/listbox/-shared.ts

@@ -1,5 +1,7 @@
 import { appendItemToList, createListElement } from '../components/list';
 
+import type { Listbox } from '../../src';
+
 export function withMultiSelect(list: HTMLElement): HTMLElement {
   list.setAttribute('aria-multiselectable', 'true');
 
@@ -21,3 +23,19 @@ export function createListWithFruits() {
 export function createMultiSelectListWithFruits() {
   return withFruitItems(withMultiSelect(createListElement(document.body)));
 }
+
+export function getItems(list: Listbox) {
+  return {
+    firstItem: list.items[0],
+    secondItem: list.items[1],
+    thirdItem: list.items[2],
+    fourthItem: list.items[3],
+    fifthItem: list.items[4],
+    sixthItem: list.items[5],
+    // ...
+    fourthLastItem: list.items.at(-4) as HTMLElement,
+    thirdLastItem: list.items.at(-3) as HTMLElement,
+    secondLastItem: list.items.at(-2) as HTMLElement,
+    lastItem: list.items.at(-1) as HTMLElement
+  };
+}