Popup menus are managed using MenuItem components. The PopupMenuInterceptor class offers a single run() method which launches a given Trigger and returns the displayed MenuItem.

For instance:

MenuItem menu = PopupMenuInterceptor.run(table.triggerRightClick(2, 4));
assertTrue(menu.contentEquals("Cut", "Copy", "Paste", "Delete"));

You can also use a more compact formatting:

PopupMenuInterceptor
  .run(table.triggerRightClick(2, 4))
  .getSubMenu("Copy")
  .click();