chore: Test mock should also update getPopupContainer

Author: zombieJ

src/mock.tsx

@@ -4,11 +4,17 @@ import { generateTrigger } from './index';
 interface MockPortalProps {
   didUpdate: () => void;
   children: React.ReactElement;
+  getContainer: () => HTMLElement;
 }
 
-const MockPortal: React.FC<MockPortalProps> = ({ didUpdate, children }) => {
+const MockPortal: React.FC<MockPortalProps> = ({
+  didUpdate,
+  children,
+  getContainer,
+}) => {
   React.useEffect(() => {
     didUpdate();
+    getContainer();
   });
 
   return children;