Migrate legacy hook tests to html2

__tests__/assets/esm/createRenderHook.js

@@ -0,0 +1,32 @@
+import { BasicWebChat, Composer } from 'botframework-webchat/component';
+import { createElement } from 'react';
+import { createRoot } from 'react-dom/client';
+
+function RunFunction({ fn }) {
+  fn();
+
+  return false;
+}
+
+export default function createRenderHook(
+  /** @type {HTMLElement} */
+  element,
+  props,
+  { renderWebChat } = {}
+) {
+  const root = createRoot(element);
+
+  return fn =>
+    new Promise(resolve =>
+      root.render(
+        createElement(
+          Composer,
+          props,
+          ...[
+            ...(renderWebChat ? [createElement(BasicWebChat)] : []),
+            createElement(RunFunction, { fn: () => resolve(fn?.()), key: Date.now() })
+          ]
+        )
+      )
+    );
+}