MainNavPageLink { public NavigationPageItem getRoot() { return root; } @Inject  MainNavPageLink(
      @Self NavigationManager navigationManager,
      @RequestAttribute(name = "levels", injectionStrategy = InjectionStrategy.OPTIONAL) @Default(intValues = 1) int levels); NavigationPageItem getRoot();  }
@Test void testGetRoot() throws Exception { underTest = new MainNavPageLink(navigationManager, 5); verify(navigationManager).getMainNavigation(5); assertSame(navigationPageItem, underTest.getRoot()); }