test(list,menu,select)!: clean up internal testing patterns from harn…

…esses

lots of hard coded stuff to enable our tests. Cleaning this up for generalized client usage.

BREAKING CHANGE: menu harnesses will not automatically open menus in quick mode anymore and interactions in menu and list harnesses will not automatically go to the first item but rather the menu roots.

PiperOrigin-RevId: 561746073

list/harness.ts

@@ -35,7 +35,7 @@ export class ListHarness extends Harness<List> {
    */
   protected override async getInteractiveElement() {
     await this.element.updateComplete;
-    return (await this.getItems())[0].getInteractiveElement();
+    return this.element.renderRoot.querySelector('.list') as HTMLElement;
   }
 
   /** @return List item harnesses. */

menu/harness.ts

@@ -22,8 +22,8 @@ export class MenuHarness extends Harness<Menu> {
    */
   protected override async getInteractiveElement() {
     await this.element.updateComplete;
-    await this.show();
-    return (await this.getItems())[0].getInteractiveElement();
+    return this.element.renderRoot.querySelector('md-list')!.renderRoot
+               .querySelector('.list') as HTMLElement;
   }
 
   /** @return ListItem harnesses for the menu's items. */
@@ -32,9 +32,8 @@ export class MenuHarness extends Harness<Menu> {
         (item) => new MenuItemHarness(item as typeof item&LitElement));
   }
 
-  async show(quick = true) {
+  async show() {
     const menu = this.element;
-    menu.quick = quick;
     if (menu.open) {
       return;
     }

select/harness.ts

@@ -41,9 +41,7 @@ export class SelectHarness extends Harness<Select> {
         (item) => new SelectOptionHarness(item as typeof item&LitElement));
   }
 
-  async click(quick = true) {
-    this.element.quick = quick;
-    await this.element.updateComplete;
+  async click() {
     const field = await this.getField();
     field.click();
   }